Дисертації з теми "Tunnelling and underground project"
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LABAGNARA, DAVIDE. "Environmental and occupational risk assessment and management in tunnelling and underground projects." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2544372.
Повний текст джерелаАнотація:
Construction is one of Europe’s biggest industries, providing jobs for nearly 13 million people. This represents nearly 8 % of the working population in Europe (only the public sector and retail employ more).
It is also one of the most hazardous industries. More construction workers are killed, injured or suffer health impairments than in any other industry, and one of the most critical section in the construction sector is the underground construction.
In particular the effect on workers’ health is of serious concern. It is difficult to be precise about the true scale of the health problem, but all studies indicate the problem is huge. Every year many thousands of workers suffer from work related diseases. These include musculoskeletal disorders, noise induced hearing loss, skin diseases, and other diseases as a consequence of exposure to noxious substances.
Additionally, the economic costs of poor safety and health are vast. One national study estimates that they typically account for up to 8.5% of a construction project’s costs.
The creation of underground space has significant impact on quality of life, working conditions, employment and environment. Innovative use of underground space will have a great impact. European Union policies include an upgrading of the Trans European road network (TREN), in order to improve interstate transport. This implies the construction of a significant number of tunnels (approx. 2100 km of tunnels will have to be constructed in Europe by the year 2030).
Underground space will be increasingly used to alleviate pressing problems that will confront the European society in the next 20 years: traffic congestion, increasing urbanization (mega cities), lack of space and pollution of air and water.
In Italy, the construction of rail and road tunnels through the Alps and the Apennines is very important in terms of connection and moreover, the requirements of transport systems, for civil use spaces and for innovative service networks is one of the reasons for the increase of underground works in urban areas more densely populated.
The hydrogeological, geological, operational and environmental criticalities as met in such geological structures can nevertheless require increased care in the aforesaid situations.
Projects under construction have further highlighted the importance of tunnels for the elimination of traditional surface, territorial and environmental constraints, but also for the necessary acquisition of consensus through the most comprehensive analysis and management of risks related to the effective fulfilment of such projects, in order both to meet the needs of the end users, and to preserve the dwellers and environmental safety conditions in terms of correct sustainable development.
The most important changes in such a point of view occurred since the end of the last century, and suggest the need of a more effective and comprehensive approach to the concept of infrastructure. For this purpose it is nowadays required a horizontal approach, whereby different disciplines (technical, structural, architectural, environmental, financial and occupational safety) can interact and mutually stimulate in order to face the complex issues of underground works project.
For these reasons, the designer's role becomes crucial to develop underground projects that respect a sustainable development approach; designer must know innovative and advanced technologies, materials and procedures, aimed at optimizing the economical, environmental and social development.
Even the public client, responsible for government priorities and objectives of the intervention, is fundamental for the orientation of the operational choices of designers and builders of infrastructures.
In fact, especially in the last decade, a number of guidelines and recommendations were issued by International, European and Italian authorities, the most effective of them based on the introduction of the prevention in the design phase and on a quality based risk management.
The design and construction of underground operations require by the Designer and Contractor/s a decision making based on multiple factors (environmental, technological, etc.) that have specific characteristics and particular criticalities, far more than other industrial contexts, since they are often characterized by considerable uncertainty in their definition during the development of the project.
In this context the Designer must identify the best option among several available solutions -which have different implications in terms of technical, operational, environmental and financial risks- while the Contractor/s must make a constant check on the preservation of design conditions, in order to control the validity of work and environmental safety requirements.
Furthermore, for maintaining the correct safety conditions, it is of primary importance the application of Hazard Identification Techniques referring to different design solutions, and the definition of suitable confidence limits in order to provide the work manager with suitable instruments to constantly evaluate the yard situation and to avoid the overcoming of the aforesaid limits.
The PhD research project has therefore to cover the most common criticalities encountered in tunnelling and underground works projects such as:
- the presence of pollutants, and in particular carcinogenic minerals, such as, for example, the crystalline silica, which is recognized class A1 carcinogen (carcinogenic certain to humans) by the International Agency for Research on Cancer -IARC- since 1997 (and reaffirmed by the same organization in 2011) and the types of fibrous silicate included in the formal definition of asbestos, which there is no discussion on the ascription to the class A1;
- the design and management of the construction yard: the presence of limited working spaces, the high concentration of high power machinery and the use of iterative work cycles, together with reduced time for the excavation, make mandatory the need to plan the interference among concomitant operations in order to prevent accident;
- the control of the safety conditions: it is of primary importance the application of Hazard Identification Techniques referring to the choice of suitable confidence limits in order to make available for the work manager the instruments to constantly evaluate the yard situation to avoid the overcoming of the aforesaid limits and referring to the choice of equipment and procedures to minimize accidents at work.
Taking into account the best available techniques, the principles of Quality and Prevention through Design approach, the PhD research has also set criteria for the identification and evaluation of the above mentioned criticalities in order to develop an expert system, finalized to make available an integrated system to optimize the economic, environmental and operational safety for the underground works activities in order to proceed rationally to choose the best solution.
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Anderson, John Muter. "The identification and control of risk in underground construction." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/7117.
Повний текст джерелаАнотація:
As the surface areas of cities throughout the world become ever more congested/ and the quality of life deteriorates, those in authority are increasingly turning to the engineering use of created space underground. Transportation systems have been located at least partly underground for generations - particularly in London. Dozens of cities throughout the rest of the world are presently engaged in underground construction, not only for rail transportation schemes, but also for communications purposes, water supply, sewerage, roads, car parks, shopping centres, concert halls, museums and art galleries. Outside the cities underground construction continues to be used for hydro-electric purposes, gas storage, inter-city highways and rail systems, and for nuclear waste storage. This international engineering research study looks at the risks involved in underground construction, and in particular the nature of risks to people directly engaged on this work and to other persons who may be affected by the works and also looks at the nature of risks to the built and natural environment. The study brings together many details of past incidents and disasters that have occurred internationally, and from a broad analysis of the types and causes of failures of one type or another, looks to how such incidents may be prevented in the future. The identification and control of risk in underground engineering projects is seen as the duty and responsibility of all the main parties to the project - the client or promoter of the project, the engineering designers, and those chosen to undertake the construction work. Key components of a broad risk control strategy are described which are applicable regardless of the project's location or what the final purpose of the underground construction work might be. Within this study there are two international Case Studies to illustrate good and poor practice in the identification and control of risk in these types of projects.
3
Gleason, Johanna. "The underground railroad." CSUSB ScholarWorks, 1993. https://scholarworks.lib.csusb.edu/etd-project/685.
Повний текст джерела
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Barakat, Mohamed Ali. "Measurements of ground settlement and building deformations due to tunnelling." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338158.
Повний текст джерела
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Lam, Tai-hing, and 林大慶. "Decompression sickness and dysbaric osteonecrosis in a compressed air tunnelling project in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B3026909X.
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Surarak, Chanaton. "Geotechnical Aspects of the Bangkok MRT Blue Line Project." Thesis, Griffith University, 2011. http://hdl.handle.net/10072/367320.
Повний текст джерелаАнотація:
This dissertation is on the geotechnical aspects of the completed Bangkok MRT Blue Line
Project and its extension which is currently under design. There were 18 cut and cover
subway stations and nearly 22 km of tunnels constructed by the use of earth pressure balanced
shield tunnel boring machines. The soil profile model up to depths of 60 to 65 m consists of
seven layers: Weathered Crust and Backfill Material; Very Soft to Soft Bangkok Clay;
Medium Stiff Clay; Stiff to Hard Clay; Medium Dense to Very Dense Sand; Very Stiff to
Hard Clay; and Very Dense Sand.
The strength and deformation characteristics of the Bangkok subsoils are determined from
laboratory tests (mainly oedometer and triaxial tests) and in-situ field tests (such as vane tests
and pressuremeter tests). Additionally, the small strain behaviour is also investigated using
Bender element tests in the laboratory and cross hole seismic tests in the field. The soil
parameters needed for the deformation analyses are determined for the Mohr Coulomb
Model, Soft Soil Model, Hardening Soil Model, and the Hardening Soil Model with Small
Strain Stiffness.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Griffith School of Engineering
Science, Environment, Engineering and Technology
Full Text
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Savage, Erin. "Investigating Rock Mass Conditions and Implications for Tunnelling and Construction of the Amethyst Hydro Project, Harihari." Thesis, University of Canterbury. Geological Sciences, 2013. http://hdl.handle.net/10092/7881.
Повний текст джерелаАнотація:
The Amethyst hydro project was proposed on the West Coast of New Zealand as an answer to the increasing demand for power in the area. A previous hydro project in the area was deemed unviable to reopen so the current project was proposed. The scheme involves diverting water from the Amethyst Ravine down through penstocks in a 1040m tunnel and out to a powerhouse on the floodplain of the Wanganui River. The tunnel section of the scheme is the focus of this thesis. It has been excavated using drill and blast methods and is horseshoe shaped, with 3.5x3.5m dimensions.
The tunnel was excavated into Haast Schist through its whole alignment, although the portal section was driven into debris flow material. The tunnel alignment and outflow portal is approximately 2km Southeast of the Alpine Fault, the right lateral thrusting surface expression of a tectonically complex and major plate boundary. The Amethyst Ravine at the intake portal is fault controlled, and this continuing regional tectonic
regime has had an impact on the engineering strength of the rockmass through the orientation of defects. The rock is highly metamorphosed (gneissic in places) and is cut through with a number of large shears.
Scanline mapping of the tunnel was completed along with re-logging of some core
and data collection of all records kept during tunneling. Structural analysis was
undertaken, along with looking at groundwater flow data over the length of the tunnel,
in order to break the tunnel up into domains of similar rock characteristics and
investigate the rockmass strength of the tunnel from first principles. A structural model, hydrological model and rockmass model were assembled, each showing the change in characteristics over the length of the tunnel. The data was then modeled using the 3DEC numerical modelling software.
It was found that the shear zones form major structural controls on the rockmass, and schistosity changes drastically to either side of these zones. Schistosity in general
steepens in dip up the tunnel and dip direction becomes increasingly parallel to the tunnel alignment. Water is linked to shear position, and a few major incursions of water (up to 205 l/s) can be linked to large (1.6m thick) shear zones. Modeling illustrated that the tunnel is most likely to deform through the invert, with movement also capable of occurring in the right rib above the springline and to a lesser extent in the left rib below the springline. This is due to the angle of schistosity and the interaction of joints, which act as cut off planes.
The original support classes for tunnel construction were based on Barton’s Q-system, but due to complicated interactions between shears, foliations and joint sets, the
designed support classes have been inadequate in places, leading to increased cost due to the use of supplementary support. Modeling has shown that the halos of bolts are
insufficient due to the >1m spacing, which fails to support blocks which can be smaller than this in places due to the close spacing of the schistosity.
It is recommended that a more broad support type be used in place of discreet solutions such as rock bolts, in order to most efficiently optimize the support classes and most effectively support the rock mass.
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Gautam, Umesh. "STABILITY ASSESSMMENT OF THE UNDERGROUND SETTLING BASIN CAVERNS OF SUPER MADI HYDROELECTRIC PROJECT,NEPAL." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for geologi og bergteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20105.
Повний текст джерелаАнотація:
Super Madi Hydrolectric Project (SMHEP) is located in Kaski District of Nepal. It is a run of river scheme with a installed capacity of 44 MW, net head of 295m and design discharge of 18 m^3⁄s.It has planned to build for the fulfillment to minimize the load-shedding problem of Nepal in the current scenario. This project lies in the lower part of the Higher Himalaya, mainly dominated by high-grade metamorphic rocks like gneiss and schists.Major task involve in this thesis work is to check for proper alignment of existing layout, assessment of stability condition with proper support system. Selection of best alternative alignment of cavern with its best shape and size are also another major work in this thesis. Optimum support estimation for the best alternative has also been done. Conclusion and final recommendations are based on stability condition and degree of rock support requirements.Geological and topographical site condition of headworks restrict for exposed settling basin therefore underground settling basin cavern in the left hill side has been selected. Rock mass in the settling basin area is slightly deformed, foliated micaous and banded gneiss with thin layer of schist. Analysis is based on assumption of ``No significant faults and shear zones across the alignment of settling basin cavern``.Both alternatives with axis orientation of N145E have been selected for the analysis. Shape of the caverns in both alternatives are inverted D. Existing alternative consists of two parallel settling basin caverns with a clear spacing of 9.5 m. Average width and height for both the caverns of existing alternative (Alternative I) are 8.4 m and 15 m whereas for proposed alternative (Alternative II) are 18.3 m and 20 m are respectively.Stress-strength factor plays a vital role for overall stability condition of the cavern. Stress induced problems such as rock bursting and spalling in hard rock whereas squeezing in weak rock is assumed. Some Empirical, Analytical, and Numerical approaches have been used for stability assessment and for designing of proper rock support system.RMR and Q-system of rock mass classification are used to classify the rock masses. Grimstad and Barton (1993) method is used in the analysis of rock bursting problem and squeezing problem. As a Semi-analytical approach ``Hoek and Marionos approach`` has been used for squeezing analysis.Numerical approaches have many benefits over empirical and analytical approaches, specifically in complex geometry like settling basin cavern. Rocscience software for numerical analysis such as Phase^2 and Un-wedge has been used. Generalized Hoek and Brown failure criterion are used to determine the state of stresses, strength factors, and deformations around the periphery of the caverns in Phase^2 . To analyze the wedge failure due to low shear strength of joints, empirical approach suggested by Barton and Bandis is used in the numerical analysis through rocscience software-Unwedge.Comparative study of empirical, analytical, and numerical approaches of analysis have been carried out for assessment of stability conditions. Finally, some recommendations to improve the analysis results have been performed.
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Ranasooriya, Jayantha. "The reliability of rock mass classification systems as underground excavation support design tools." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/846.
Повний текст джерелаАнотація:
This thesis examines the reliability of rock mass classification systems available for underground excavation support design. These methods are sometimes preferred to rational methods of support design particularly if detailed information required for the latter mentioned methods is lacking. The classification approach requires no analysis of any specific failure mechanisms or the forces required to stabilise unstable rocks, yet, the support measures thus designed are considered to deal with all possible failure mechanisms in a rock mass.Amongst the several rock mass classification methods developed for application in underground excavation engineering, two have stood out. These are known as rock mass rating (RMR) and tunnelling quality index (Q), introduced by Bieniawski (1973) and Barton et al. (1974), respectively. Over the years, the two methods have been revised and updated so as to improve their reliability as support design tools, yet the two methods are know to have limitations and their reliability has long been a subject of considerable debate. Nevertheless, attempts to assess their reliability in a systematic manner have been limited. Further, some practitioners in the field of rock engineering continue to use these methods as the sole methods of support design for underground rock excavations. The objective of thesis, therefore, is to contribute to a better understanding of the reliability of the two classification methods.This study considered that the reliability of the RMR and Q methods can be assessed by comparing their support predictions with those derived by other applicable methods and also with the actual support installed. Such an assessment can best be carried out during excavation of an underground opening because representative data can be collected by direct observation of the as-excavated ground conditions and monitoring the performance of the support installed. In this context, the geotechnical data obtained during the construction of several case tunnels were reviewed and the two classification methods were applied. The effectiveness of their support predictions was then evaluated against the potential failures that can be predicted by some of the applicable rational methods. Since the rock masses intersected in the case tunnels are jointed, mostly the structurally controlled failure modes were analysed. The support measures predicted by the two methods were compared with each other and with the actual support installed in the case tunnels. Further, the RMR and Q vales assigned to the case tunnels were correlated to observe any relationship between the two.The study showed that the RMR and Q predicted support measures are not always compatible. In some circumstances, the two methods can either overestimate or under estimate support requirements.
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西山, 要一, and Yoichi NISHIYAMA. "The conservation project of underground tomb with wall painting in Burj al Shamali, Tyre, Lebanon." 名古屋大学年代測定資料研究センター, 2012. http://hdl.handle.net/2237/18142.
Повний текст джерела
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Schropp, Christian [Verfasser]. "Integrated mineral processing in underground mining operations and impact on the mine project / Christian Schropp." Düren : Shaker, 2019. http://d-nb.info/1198599790/34.
Повний текст джерела
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Hung, Vinnie. "Modeling uncertainty in the New York City no. 7 subway line extension project using Decision Aids for Tunnelling (DAT)." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/73787.
Повний текст джерелаАнотація:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 67-69).
Given the frequent cost overruns and schedule delays associated with underground construction projects, it is imperative that a detailed estimate of both be developed and considered prior to starting construction. The Decision Aids for Tunnelling (DAT) allow engineers to consider the uncertainties associated with project ground conditions, construction activities, and problem events, and to determine distributions of total cost and time for completion of construction. This is done by simulating the geological conditions in each DAT simulation and then using the resulting conditions in further simulations of construction processes. As each simulation will only produce one resulting point with a value for cost and a value for time, numerous simulations must be run by the DAT in order to produce a complete scatter gram with a distribution of total possible costs and duration. This thesis utilizes the DAT to develop a distribution for the total cost and duration of constructing the New York City Number 7 Subway Line Extension Project's Running Tunnels using a tunnel boring machine. The results will show the applicability of the DAT, given pre-construction geologic information and post-construction TBM progress data but only total cost. As is to be expected, subsurface conditions were limited to pre-construction baseline information. Despite these limitations, use of available data by the DAT generated a scattergram, forecasting a range of possible cost and duration outcomes.
by Vinnie Hung.
M.Eng.
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Nikolaev, Simon. "Evaluation of high pressures in grouting using RTGC - a case study." Thesis, KTH, Jord- och bergmekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175147.
Повний текст джерелаАнотація:
“Real time grouting control method” är ett koncept för att övervaka och bedöma spridningen av injekteringsbruk under injektering. Målet är att kunna använda penetrationsavstånd som stopkriterium och att kunna övervaka hur injekteringsarbetet fortskrider i realtid, vilket skulle göra injekteringsarbetet mer tids- och kostnadseffektivt. Teorin har prövats med data från ett tunnelprojekt i Sverige med kristallint berg från prekambrium-eran, och med data från dammprojekt i Iran och Laos med sedimentärt berg, samtliga med lovande resultat. RTGC-teorin har nyligen vidareutvecklats, där bedömningar och begränsningar angående jacking föreslås, utifrån en kombination av injekteringstryck och spridning av injekteringsbruk. Teorin har tvecklats både för elastisk jacking, där deformationer kan kompenseras för, och för plastisk jacking, där deformationerna är permanenta. Effekterna av höga tryck och jacking kan uppskattas och de eventuella negativa konsekvenserna kvantifieras. Mer specifikt ligger fokus på vilken påverkan sprickdeformationer kan ha på penetrationsavståndet och på transmissiviteten i en spricka. Syftet med detta examensarbete har varit att undersöka vilka effekter höga injekteringstryck har på injekteringsprocessen av en tunnel med avseende på jacking. I examensarbetet har teorin för RTGC använts för att analysera data från ett järnvägstunnelsprojekt i Norge, där betydligt högre injekteringstryck än i Sverige generellt sett används. Teorin har kunnat appliceras på data framgångsrikt, även om mindre anpassningar varit nödvändiga. Orsaken till anpassningarna är att teorin främst är utvecklad för ett mer eller mindre konstant injekteringstryck, samtidigt som ett varierande injekteringstryck i viss utsträckning använts i det norska projektet. Resultaten tyder på att det skulle vara möjligt att spara både tid och pengar med hjälp av RTGC, genom att minska åtgången av både tid och injekteringsbruk. Resultaten antyder även att höga injekteringstryck kan orsaka betydande jacking om geologin och sprickornas orientering och längd är ogynnsamma. Om och i vilken utsträckning jackingen påverkar den slutliga tätningen av bergmassan har emellertid inte kunnat studeras i detta projekt, då data kring inläckage ej varit tillgänglig vid genomförandet av analysen. Vidare visas, trots vissa antaganden och förenklingar i den geologiska modellen, att denna teoretiska modell möjliggör en bedömning av effekterna som injekteringstrycket har på det slutliga resultatet. Detta bör kunna användas för att välja ett optimalt injekteringstryck.The “Real Time Grouting Control Method” is a concept for governing the grout spread during a grouting operation. The goal is to be able to use the penetration length as stop criterion and to be able to monitor the progress of the grouting operation in real-time, which would make grouting operations more efficient in terms of time and cost. The theory has been tested with data from tunnelling projects in Sweden with pre-cambium rock, and with data from dam projects in Iran and in Laos with sedimentary rock, all with promising results. Recently there have been developments in the RTGC-theory that propose jacking limits based on a combination of grout pressure and spread of grout, both for elastic jacking, where deformations can be compensated for, and ultimate jacking, where deformations are permanent. With the theory, the effects of high pressures and elastic jacking can be assessed, and the negative consequences of elastic jacking can be quantified. Specifically, the focus is on the effect that fracture deformation may have on the distance that the grout penetratesinto a fracture, and on the transmissivity of a fracture. The aim of this thesis is to evaluate what effects high grouting pressures may have on the grouting process with respect to jacking. To obtain this, the theory is used to analyse data from a railway tunnel project in Norway, where considerably higher grouting pressures than in Sweden are used. The application of the theory has been successful, even though some minor adaptions have been necessary. The reason for the adaptions is that the RTGC-theory is developed for a more or less constant grouting pressure, while a varying pressure to some extent has been applied in the Norwegian project. The results suggest that using RTGC could save time and money by reducing grouting time and grout volume. The results also suggest that the high grouting pressures may cause considerable jacking if the geology and fracture situation is unfavourable. If and to what extent the jacking affects the final tightness of the rock mass has however not been possible to determine, given that data regarding measured leakage has not been available at the time for this analysis. It is shown that despite assumptions and simplifications in the geological model, using this theoretical approach enables the estimation of the effect that the grouting pressure has on the outcome of the performed grouting, arguably allowing for the optimum grouting pressure to be selected.
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Olufe, Oludare Joseph. "Study of Production Drifts Stability and Assessment of Reinforcement Requirements at LKAB Konsuln Test-Mine Levels 436 and 486 Using Geologic Structures Data, and Modelling Software – Dips and Unwedge: a Part of dp1 Project (Mine Layout and Technology) of the Sustainable Underground Mining (Sum) Project." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-434644.
Повний текст джерелаАнотація:
Study of Production Drifts Stability and Assessment of Reinforcement Requirements at LKAB Konsuln Test-Mine Levels 436 and 486 Using Geologic Structures Data, and Modelling Software - Dips and Unwedge: a Part of dp1 Project (Mine Layout and Technology) of the Sustainable Underground Mining (Sum) Project Oludare Joseph Olufe Global population has been on exponential increase over the past half century. The population explosion is driving massive urbanization and infrastructure developments across the globe, which result in huge demand for metals, especially steel. The trend is forecasted to continue to rise steeply in for the next two decades. This is putting enormous strain on metals mining, especially because new surface economic deposits are rare to come by. Therefore, mining is steadily going deeper in many of the mining destinations across the world. Mining at great depths present unique challenges, particularly regarding stability of excavations at depths. Rock falls, rock burst, excavation collapse are common occurrences associated with deep mining. In regions with high seismicity potentials the frequency and consequences could be very high. Over the past decade ground instability has become a significant challenge confronting mining at LKAB deep mines. There had been incidents that resulted in long term closure of sections of the mines, with resultant adverse economic impacts. More undesirable is loss of live of personnel. The study was conducted at the Konsuln test mine levels 436 and 486, aimed to investigate the impacts of geologic structures on excavations instability at depths, at the Kiruna iron ore mines, on one hand. And on the other hand, evaluate the influence of geologic structures on ground reinforcements at the mine. Structural data were collected and analysed using Dips program to define orientation of major structures. The results were used for wedge analysis and excavations stability modelling using Unwedge program. Important rock mechanical parameters were defined based on data provided, and others based on literatures. A design factor of safety of 1.5 was used. Results from the study established that structures have significant impact on excavations instability at the Konsuln mine. 100% of the production drifts studied has minimum of four wedges formed in its perimeters. Out of this approximately 37% has factor of safety lower than 1.5. Evaluation of reinforcements (shotcrete and rock bolts) implemented in the mine found that approximately 15% of the total wedges formed in the production drifts has factor of safety less that 1.5 after both shotcrete and rock bolt reinforcements had been implement. Also, approximately 5% of the total wedges has apex height longer the rock bolt length. It was therefore concluded that structurally induced instability is a major contributor to excavations instability at the Kiruna mine. The study approach presented a new methodology to understand and provide robust solution to ground instability problem at the mine.
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Saad, Lina. "Omfattningsändringar i infrastrukturprojekt : En fallstudie med fokus på ett tunnelbaneprojekt i tidiga skeden." Thesis, KTH, Fastigheter och byggande, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298311.
Повний текст джерелаАнотація:
Transportinfrastruktursystem spelar en viktig roll i stadsutvecklingen. Nyttjandet av underjordiska utrymmen för transportsystem ökar alltmer och används som potentiella lösningar för att lösa urbaniseringsproblem. För att möta den snabba befolkningstillväxt som Stockholm står inför initierade regeringen Stockholmsöverenskommelsen 2013 som innebar en omfattande utbyggnad av tunnelbanenätet samt en ökad bostadsbebyggelse. Tunnelbaneutbyggnaden är i Sverige den första att genomföras på trettio år och projektet har i det tidiga skedet redan ändrats i omfattning i två etapper. Syftet med studien är att bidra till en ökad förståelse inom området inför framtida projekt av samma karaktär. Målsättningen är att undersöka vilka faktorer som påverkar projektets benägenhet att ändras och hur dessa faktorer i sin tur påverkar projektledarens möjligheter att leda projektet. Problemet avgränsas till ett beställarperspektiv i tidiga skeden och studeras i en svensk kontext. Forskningen har genomförts som en kvalitativ fallstudie. Fallstudien består av dels en intervjustudie dels en dokumentstudie. Det studerade fallet representerar projekt Akalla-Barkarby som är ett av de delprojekt som ingår i Stockholmsöverenskommelsen. Studien har identifierat ett antal faktorer som antas påverka projektomfattningen till en större benägenhet att ändras. Dessa faktorer är relaterade till dels de förutsättningar som låg till grund för projektet i och med investeringsbeslutet dels komplexiteten i projektsystemet. Dessa faktorer skapar osäkerheter och begränsar projektledarens möjligheter att leda projektet.Transportation infrastructure systems play an important role in urban development. The use of underground spaces for transport systems is increasing and is viewed as a potential solution to solve urbanization problems. To meet the rapid population growth that Stockholm is facing, the government initiated the Stockholm Agreement in 2013, which entailed an extensive expansion of the metro system and an increased housing development. The metro system expansion in Sweden is the first to be completed in thirty years and the project has in the early stages already changed in scope twice. The purpose of the study is to contribute to an increased understanding in the field for future projects of the same nature. The aim is to investigate the factors that affect the project's propensity to change and how these factors in turn affect the project manager's opportunities to lead the project. The problem is limited to a Client perspective in the early stages and is studied in a Swedish context. The research has been carried out as a qualitative case study. The case study consists partly of an interview study and partly of a document study. The case represents the Akalla - Barkarby project, which is one of the sub-projects included in the Stockholm Agreement. The study has identified several factors that are assumed to influence the project scope to a greater tendency to change. These factors are related partly to the preconditions of the project based in the investment decision and partly to the complexity of the project system. These factors create uncertainties and limit the project manager's opportunities to lead the project.
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Paterni, Maria Luisa. "First Assessment by groundwater modelling of the water influx in cavities linked to the future underground Einstein Telescope in the three borders region(D, NL, Be)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21543/.
Повний текст джерелаАнотація:
In the three borders region of Belgium, The Netherlands and Germany a gravitational waves observation centre named Einstein Telescope project is under consideration. The centre would consist mainly in three underground cavities linked by three tunnels forming a triangle with 10 km sides. This master thesis work has the aim of studying the water influx induced by the construction of the Einstein Telescope. As a first step, the present work is focused on the numerical simulation of the groundwater around the future cavities and tunnels. The model is carried out with the use of GMS-MODFLOW using the finite difference technique. Two conceptual models have been simulated. A first conceptual model has been simulated with the presence of the underground cavities (corresponding to one of the triangle corner) and the sensitivity analysis has been performed to show how the model is sensitive to the change of parameters such as the hydraulic conductivity of the geological media and the conductance of the drains, representing the cavities. The study of the induced groundwater flow has been done for three different cases with the designed hydraulic conductivity of the different geological formations. Then, an additional sensitivity analysis has been performed changing the hydraulic conductivity of all the geological formations with the exception of the one containing the simulated cavity. Another scenario has been simulated with the presence of one underground tunnel, for predicting the groundwater quantity that will be drained by a typical tunnel section. The modelling of the tunnel has been done for showing the response of the groundwater flow model in terms of drained flow. In both models, the drawdown has been also estimated.
17
AMIGONI, LIVIO. "Shababs on the Move: Ethnography on the Underground Migratory Routes from Sudan to the United Kingdom." Doctoral thesis, Università degli studi di Genova, 2022. https://hdl.handle.net/11567/1099305.
Повний текст джерелаАнотація:
The present research project aimed to investigate the struggles undocumented Sudanese migrant face to circumvent legal and geographical borders and to gain some form of citizenship. I focused on the kind of journeys, referred to as sombok, their precondition, narration and social practices implemented along the irregular routes from Sudan to the United Kingdom. In doing so, particular interest was paid to the production, circulation and resilience of migratory knowledge roaming in transnational networks and resulting in consequent mobility patterns, tenaciously and ceaselessly reproduced. Indeed, despite the increasing difficulties, due to massive investment in border patrolling and externalisation of controls, it is apparent that this does not deter people from migrating and neither does it prevent arrivals and movements in Europe.
18
Dostál, Tomáš. "Návrh ražby a primárního ostění tunelu na stavbě vysokorychlostního železničního spojení." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409747.
Повний текст джерелаАнотація:
As part of modernization of the Brno-Přerov railway line, is in the section between village Blažovice and town Vyškov desined tunnel composed of two monorail tubes about 640 meters length. Tubes are situated in neogenic clay with an overburden height of 11 meters. This master thesis deals with design suitable tunnel exavation, primary lining with static calculation and geotechnical monitoring.
19
Nováková, Zuzana. "Podzemní garáže v Brně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225514.
Повний текст джерелаАнотація:
The thesis focuses on the design of the underground garage in the centre of Brno under the Petrov hill. The main target of the thesis is to design spatial arrangement of the underground space and its feasibility study. In the following parts the design of the structural solution and its check calculation is carried out.
20
Stromecký, Jiří. "Hotel." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227495.
Повний текст джерелаАнотація:
My thesis project addresses a newly built hotel in the city of Brno. This work aims to describe the project documentation for the building construction. It is a freestanding building on flat terrain. The building has four floors and a basement. Located in the basement is a parking garage, technical equipment, and an area for sports and recreation. On the first floor there is a reception area, a restaurant, a cafe, retail space, and an outdoor terrace. The second and third floors are designed to accommodate guests with single and double rooms. In addition to the guest rooms there are two apartments, two rooms with handicapped access, children's play areas, and open common areas. The fourth floor includes guest room accommodations (single and double rooms), two board room offices, and two individual offices. The hotel management office is also located there along with a snack bar and an additional meeting room. The outer structure of the hotel consists of reinforced concrete skeleton, with bricked envelope of liaporbetonovým blocks. The skeleton is based on the footings. The building is covered with two mA single pass roofs, one of which is designed as vegetation. The building is insulated.
21
Sviták, Tomáš. "Domov pokojného stáří." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240446.
Повний текст джерелаАнотація:
The subject of this thesis is a design documentation for new construction of the elderly house in Austerlitz. The building has one underground and two or three floors. Designed capacity is 40 clients in the house. In addition to the accommodation of seniors also provides catering facility, motivational activities and other services connected with the activities of the senior home under the Act on Social Services. From a structural point of view it is an object of a wall brick supporting system, ceiling structures are made of panels of prestressed concrete. Roofs are designed flat single shell.
22
Beranová, Iveta. "Motel." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265638.
Повний текст джерелаАнотація:
The diploma thesis deals with the processing of project documentation. Specifically, the parts A, B, C, D.1.1 and D.1.3 of Annex 6 to Regulation No. 499/2006 Coll., On construction documentation, as amended by Decree No. 62/2013 Coll. The documentation refers to a motel with restaurant designed for 50 guests. The plot is located in Troubsko. The motel is divided into three separate buildings. In the main building is reception, restaurant with kitchen and offices. The building has ground floor and underground floor. The accommodation is divided into two one-storey buildings. The buildings are formed by separate units with 4 or 2 rooms which are connected by one roof. All buildings are designed with flat green roof. There is parking lot for public and restaurant guests, for accommodated guests ans private parking for employees and supply is solved on the plot. The buildings are based on plain concrete foundation strips. Vertical load-bearing structures are designed from sand-lime. Horizontal load-bearing structures are designed from precast filigree slabs. Partitions are designed from autoclaved aerated concrete blocks. The facade is thermally insulated by EPS boards. The 3% slope of the roof is achieved by using tapered EPS boards. Vegetation (stone crops) will be planted on the roof. part of this thesis is static calculation and design of staircase slab from reinforced concrete.
23
Malý, Jiří. "Sidlo stavební firmy." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227550.
Повний текст джерелаАнотація:
This thesis processes project documentation for headquarters of construction company. Main purpose of building is to facilitate administrative nd manufacturing needs of the company. Building contains of reception, offices, meeting room, restrooms and lock rooms for employees, elevator and workshops. There is underground garage in the basement. Building is going to be situated in Stritez u Policky. Building takes up 1088m2 of land. Vertical structures are mainlymade of concrete and brick blocks. Horizontal structures are made of reinforced concrete panels, roof structure is made of wooden trusses.
24
Slováček, Ondřej. "Stavebně technologický projekt polyfunkčního domu Sokolská 5 v Olomouci." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372119.
Повний текст джерелаАнотація:
The subject of this diploma thesis is the elaboration of the building project of Polyfunkční dům Sokolská 5. In the course of the diploma thesis is elaborated a summary technical report, report of building site and drawings for individual stages. The implementation of the waterproofing of the base structure and the reinforced concrete monolithic skeleton are subject to technological regulations and control and test plans. In this work the object time and financial plan, the use of machines and mechanisms and health and safety at work are also solved. For the main building objects, an item budget and a detailed schedule are prepared. Part of this work is also the calculation of the heat transfer through the envelope of the building.
25
Kolařík, Jan. "Analýza developerského projektu na výstavbu administrativního objektu v Brně." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-233120.
Повний текст джерелаАнотація:
The aim of this diploma thesis is determine feasibility and profitability of property development project at particular lands in Brno. Solution of problem includes both, the legislative part that determines possibility lands focused on change of territorial plan and the financial part that estimates costs and revenues in project balance and potencial profits for investor, if project will be realized. Main result of this diploma thesis is to answer the question, if property development project should be realized at particular lands in question and estimate future value of lands and project. Diploma thesis \uv{Analysis of the development project for the construction of an administrative building in Brno} is useful for everyone, who needs estimate potential of a land for profit from realization of property development project.
26
KONG, WANG-PU, and 汪溥剛. "A comparison study of underground pipeline constructions: open-face shield tunnelling versus closed-type shield tunnelling in gravel formation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/80846468200758732892.
Повний текст джерелаАнотація:
碩士逢甲大學
土木工程所
99
Through several construction experience and tests, engineers have developed one tunnel technology, named Shield Tunneling Method. Recently, because difficulties in getting lands for construction in urban areas and several problems during construction such as voice, vibration, road excavation, and route changing affect the construction of underground systems, new system has to be constructed in much deeper stratum. Thus, Shield Tunneling Method becomes more common in several constructions such as MRT, sewage treatment systems, and water and electricity supply systems. This study analyzes the gravel layer construction process associated with Shield Tunneling Method in the sewage treatment system in Central Taiwan Science Park. According to the status of geology and groundwater factors, we analyze the benefits of Open and Close Shield Machines respectively and discuss the relationship between effectiveness and entering timing of Shield Machines. By adding cost factors, this paper tries to find out the optimal portfolios of Shield Machines for references of later constructions. The following are the results of this study. (1) Stratum and underground water would reduce the effectiveness of Open Shield Machines. (2) Stratum would affect the operation of Close Shield Machine, but the effects of underground water on operation of Close Shield Machine are small. (3) After considering the relationship between effectiveness and entering timing of Shield Machines, we find that whether the construction can be finished on time or not depends on the processing time of machines. In addition, after evaluating cost factors, we can further understand that the number of accomplishment increases with the level of cost.
27
Chien, Chen-Chih, and 陳志堅. "The Analysis of Constructing Underground Station of MRT using Shield Tunnelling Method." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/00460956504063403904.
Повний текст джерелаАнотація:
碩士國立臺灣海洋大學
河海工程學系
100
This analysis highlights on the requisite to develop Shield Tunnelling Method for underground station in Taiwan by referring to the examples of underground station constructions and MRT’s operation systems in other countries, and comparing to the future construction sites like station LG02, LG03 in Taipei as well. The construction of MRT in metropolitan will bring severe impact on both traffic and business. Recently, building MRT with underground construction is the efforts to lessen the impact. On the other hand, underground constructing within crowded buildings is risky for both constructors and civilians. For past years, the cut-and-cover method for MRT station has been adopted. Nevertheless, the difficulties that the method has encountered include the limited width of roads, existed drainage culvert, utilities and sewer pipelines or even passing through constructed MRT lines. In order to avoid the constructed MRT lines and existed pipelines, diminish earthworks, and consider eco sustainability, as well as reduce the influence caused by MRT construction on traffic and environment, assuming new philosophy in planning MRT routes and decreasing the difficulties on construction-site is crucial. Therefore, Shield Tunnelling Method for underground station construction plays an important role for the solution of above predicaments. The research articulates the challenges and strategies of developing Shield Tunnelling Method for underground station construction in Taiwan, which will provide not only reference resources for further efforts but also benefit MRT-route-net planning in the future.
28
HSI-MING, WU, and 吳喜民. "The Effectiveness Assessment of Kaohsiung Underground Railway Project Team." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/xsfa24.
Повний текст джерелаАнотація:
碩士國立高雄應用科技大學
土木工程與防災科技研究所
105
Railway underground engineering is one of the major public works in recent years. There are many uncertain construction variances within a striped region. Thus, the schedule of engineering project will be often delayed. In order to solve such problem, this study used the method of Causes & Effects Chart to investigate the project teams for gathering seven quality control items. The data analyzed by Analytical Hierarchy Process (AHP) to obtain their impedance factors. For taking the underground engineering of railway in Kaohsiung area as an example, the results show that the feasibility and accuracy of this model can be used as a future similar type of project planning reference.
29
Han, H. "FDEM simulation of tunnelling‑induced rock failure, fracture and collapse and their control in deep underground." Thesis, 2021. https://eprints.utas.edu.au/45886/.
Повний текст джерелаАнотація:
In recent decades, more and more underground tunnels have been designed and constructed in worldwide to meet the multiple needs of modern society, such as for transportation, mining, and oil exploitation. For tunnelling in deep underground, the evaluation and prediction of the developments of rock failure, fracture and collapse around the tunnel are of significant importance in ensuring the quality of the tunnels constructed and in preventing potential accidents. However, in some complex practical cases the rock fracture and fragmentation mechanisms under the influences of multiple effective factors on the sites have not been well understood yet, which are worthwhile for further study. Recently, to numerically study the progressive rock fracture process from continuum to discontinuum behaviour, combined finite-discrete element method (FDEM) has been increasingly developed and applied in simulating and analyzing underground engineering problems. In this work, an in-house FDEM computer program parallelized using general-purpose graphic process unit (GPGPU) is further developed with some new features implemented in order to achieve realistic simulations of the whole rock failure, fracture and collapse progressive processes induced by tunnelling in deep underground and their control. Using the GPGPU-parallelized FDEM code, a series of studies based on practical tunnelling cases are conducted to reveal the underlying rock failure, fracture and collapse mechanisms in these cases. In each study, the rock fracture initiation and propagation, as well as the rock block and fragment expulsion, ejection and flyout that could be difficult to capture on the site or via other research methods are vividly reproduced in the FDEM numerical modellings, followed by the investigations of the influences of various factors on rock fracture patterns and damage evolutions. Through these studies, firstly the occurrences and developments of rock fractures and rockbursts around a deep tunnel excavated by tunnel boring machine (TBM) under high in-situ stresses are investigated. It is found that some crucial geological and geotechnical characteristics of the site have significant effects on the rockburst development. For the modelled tunnelling case in which the in-situ major principal stress is along the vertical direction, the pre-existing fault near the tunnel could aggravate the rockburst incident at the tunnel roof and the tunnel side close to the fault, while a lower in-situ lateral pressure coefficient could contribute to the alleviation of the rockburst development around the tunnel. Besides, the tunnel shape plays a significant role in determining the initiation locations and patterns of the stress concentration zones and accordingly the fracture initiation and propagation behaviours that result in rockbursts around the tunnel. The effectiveness and efficiency of the proposed method in the investigation of the rockburst development mechanisms in deep tunnelling are embodied through the study. Then, the rock fracture and fragmentation process and the development of resultant excavation damaged zone (EDZ) during tunnelling by drilling and blasting in deep underground are simulated. The combination of in-situ stress field, equation-of-state based blast loading, and fracturing in tension and shear with gas flow loading of fractures for modelling the complex dynamic interactions from multiple blast rounds is achieved successfully for the first time using FDEM. For the modelled tunnelling case involving multiple contour blast rounds, it is found that in-situ stresses suppress the propagation of long fractures and removing the in-situ stresses results in smoother sidewall fracturing with more damage in the crown and invert. Increasing rock heterogeneity, above a threshold, induces more fractures. Increasing the detonation timing between blast-holes induces more damage into the rock mass and fragmentation in the burden. Moreover, longer decay time ratios and higher decoupling ratios result in additional rock fracture and fragmentation around the tunnel. The proposed method is highly flexible in investigating the influences of various factors on the rock fracture pattern and EDZ development around the tunnel, and its capability to show the realistic rock fracture and fragmentation processes contributes to the better understanding of these influences. Finally, numerical simulations are conducted to investigate the rock dynamic fracture mechanism by destress blasting and its application in controlling the violent fracture of rock during tunnelling in deep underground. The effectiveness of the destress blasting application in preventing potential rockburst in deep tunnelling is further studied, and it is found that the success of the destress blasting application is highly dependent on its design itself such as the arrangement of the blast-holes and the explosive charges. The developed code is innovative and robust in finding the balance between multi-factors and reducing the tremendous efforts to successfully apply the destress blasting in controlling the tunnelling-induced rockbursts in deep underground. Outcomes of these studies show that the in-house GPGPU-parallelized FDEM code provides a powerful tool to realistically investigate complex rock failure, fracture and collapse processes and their control during tunnelling in deep underground, which overcomes the obstacles of the conventional numerical simulation approaches in modelling the progressive rock fracture processes from continuum to discontinuum behaviours in deep tunnelling and therefore fills the research gaps on this topic. The research outcomes in this thesis are also of guiding importance for certain tunnelling designs and constructions in practice, and the proposed method is expected to be used for the evaluation and prediction of the developments of rock failure, fracture and collapse in many other tunnelling scenarios in future studies.
30
Ping-Huang, Yi, and 黃一平. "BIM applied to the study of water underground pipeline project." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/64922515454770560050.
Повний текст джерелаАнотація:
碩士中國科技大學
建築研究所
102
Most of Taiwan's water pipeline buried beneath the city roads, urban roads in the current pipeline in addition to the presence of water pipelines, there are rain water, electricity, telecommunications, gas, pipeline and fiber, such as pipelines, roads and in conformity with the existing management units for burial depth has specification, various pipeline burial depth of 120 cm from the top of the road surface pipe standard, but in the early construction of various pipelines buried or when, due to fewer pipeline type and quantity, not been able to follow the above specification and construction. Even though the open-cut construction and dominated early, but often difficult, because in 84 years by the industry from abroad to promote short tube construction method and propulsion machinery and equipment, but in promoting continuous improvement to enhance the engineering, development and mechanical properties Next, by the early cut-and-cover construction method to today's advance, shield and other construction methods, engineering from the early ground surface excavation to today's underground rapid transit, rail, water supply and drainage channels, joint pipeline project and highway tunnels, so that the construction method is increasingly is widely used. With the underground construction methods and building information model (Building Information Modeling, referred to as BIM) technology matures, BIM has become a trend in the world of industrial design, although the country also has the use of BIM technology successfully applied for the case of imported works, but According to the literature collection technology is currently used mostly for domestic BIM engineering and building construction on the MRT project, not yet applied to the underground pipeline project, a large underground pipeline to be divided into five major pipelines, water and sewage pipelines but only need to consider the condition more, the research on water pipeline project to collect and collate the relevant literature to do, and to apply for the water pipeline project during the import BIM, how to effectively solve the low performance problems caused by lack of information and help staff effectively control the overall information and to facilitate the flow of information sharing, can effectively integrate the construction of water pipelines, and enhance knowledge management and various stages of value-added professional information to improve the quality of water pipeline and operating performance and specific management mechanism, and thus greatly enhance the industrial capacity to enhance the local construction industry and global standards and sustainable development.
31
Scussel, Dario. "A new approach to the polyaxial stress numerical analysis of underground openings." Thesis, 2012. http://hdl.handle.net/10413/9114.
Повний текст джерелаАнотація:
The traditional design methodologies for tunnel and underground excavations are divided in to
three categories: Empirical, Analytical, and Observational approaches, whereas in the last years the
Numerical approach has strongly become popular both for the intrinsic simplicity of the software
packages and their ability to manage problems unsolvable with the classic methods.
In this thesis, the underground openings have been analyzed using constitutive models other than
the Mohr-Coulomb theory. FLAC is used for the analysis and the software has been implemented to
include the Polyaxial Strength Criterion. The details of the modifications made in the software are
presented and the results are compared with the Singh's elasto-plastic stress distribution in
squeezing grounds.
The applicability of the Polyaxial Strength Criterion has been therefore extended to all the
numerical suites designed for geo-mechanical purposes (FEM, FDM, …) and the obtained results
compared to the observations of deformation and radial squeezing pressure of the instrumented
tunnels in the Chibro-Khodri underground power station.
This study will develop better comprehension of the behavior of the underground openings and also
provide a useful tool to the designers in the planning stages.Thesis (Ph.D.)-University of KwaZulu-Natal, Durban, 2012.
32
you-Her, Cheng, and 何昌祐. "The Assessment of Railway Construction Risk Factors- Kaohsiung Railway Underground Project." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/94029363000824675617.
Повний текст джерелаАнотація:
碩士國立高雄應用科技大學
土木工程與防災科技研究所
100
Railroad reconstruction is one of the major public transportation projects in Taiwan. Inparticular,underground railroad reconstruction can improve traffic conditions,eliminate trafficaccidents,and provide valuable land in metropolitan area. Nevertheless,the cost of constructionis high,project duration is long,and risk involved is high. According to TRA reports, ther are 17 railroad reconstruction related accidents, including broken of electricity power line, improper handling of steel bar cage,improper installation of power line connection, and worker injuries due to unauthorized access. Inlight of this, this research sets to investigate the underground railroad reconstruction risk factors,by studying the undergoing underground railroad reconstruction projects at Kaohsiung City. This research intends to indentify constructor’s risk factors involved in underground railroad reconstruction projects and relative weightings for these risk factors. TOstudy the constructor’s current practice in analyzing project risk before tendring, the researchers interviewed several industry experts. Using modified Delphi method and AHP, riskfactors associated with railroad reconstruction are idea tified and associate weightings are obtained. The research results provide valuable information for constructors to indentify risk factors in the early stage and enablethem to respond early to improve the overall cost and schedule performance.
33
Perras, Matthew A. "Tunnelling in horizontally laminated ground: The influence of lamination thickness on anisotropic behaviour and practical observations from the Niagara Tunnel Project." Thesis, 2009. http://hdl.handle.net/1974/5160.
Повний текст джерелаАнотація:
The Niagara Tunnel Project is a 10.4 km long water diversion tunnel being excavated under the city of Niagara Falls, Ontario by a 14.4 m diameter tunnel boring machine. This tunnel has descended through the entire stratigraphy of the Niagara Escarpment, including dolomites, limestones, sandstones, shales and interbedded zones of these rock types, passed under St. Davids Buried Gorge ascending to surface. Working at the tunnel provided an opportunity to assess and
document the horizontally laminated ground behaviour for this large diameter circular tunnel and provided the backdrop for this study. A detailed understanding of the geological history was necessary.
Modelling of laminations, ranging between 0.16 to 16 m in thickness, was conducted to
determine critical behaviour and cut-offs for failure modes. A critical normalized lamination thickness (thickness/radius) of 0.9 was found to exist, above which the excavation response is similar to the equivalent isotropic model, and below which the laminated behaviour corresponds
to a characteristic failure mode controlled by bed deflections and bed parallel shear. Initially, as the normalized lamination thickness is decreased below 0.9, the stresses are channeled through
the crown beam which concentrates the yield and increases the crown deflections. This results in crown beam failure. As the lamination thickness decreases, further the stresses are shed to multiple laminations increasing the displacements significantly and changing the shape and extent
of the yield zone. From multiple lamination coupling to self-limiting yield the development of chimney style failure is controlled by the degree of tensile yielding. Tensile yielding first begins
in the haunch area and progressively extends above the crown, as the lamination thickness
decreases, until a self-limiting plastic yield zone shape is reached at normalized lamination thicknesses below 0.026. Incorporation of discrete anisotropy is necessary to accurately model
the excavation response in horizontally laminated ground.Thesis (Master, Geological Sciences & Geological Engineering) -- Queen's University, 2009-09-15 16:34:47.134
34
Haile, Andrew Thurlo. "A mechanistic evaluation and design of tunnel support systems for deep level South African mines." Thesis, 1999. http://hdl.handle.net/10413/9077.
Повний текст джерелаАнотація:
The design of support systems, comprising rock bolt reinforcement and fabric containment
components for tunnels in deep level mining environments does not currently cater well for
adverse rock mass conditions. This often results in periodic failure of the support system,
particularly under dynamic (rockburst) conditions with the potential for total collapse of the
excavation. The design of support systems is currently based either on empirical design
guidelines often not applicable to this environment or simple mechanistic models.
This thesis details a methodology for the rational design of tunnel support systems based on a
mechanistic evaluation of the interaction between the components of a support system and a
highly discontinuous rock mass structure. This analysis is conducted under both static and
dynamic loading conditions. Due to the highly complex and variable nature of the rock mass
structure and the dynamic loading environment, a large component of the practical work on the
evaluation of the mechanisms of rock mass deformation and support interaction is based on
rockburst case studies. The understanding gained from these investigations is further
evaluated by means of laboratory testing of the performance of the components of the support
systems and numerical modelling of the interaction of the components of the support system
with the rock mass.
Due to the complex nature of this design environment the methodology developed in this thesis
is but a step towards our greater understanding of the behaviour of the rock mass, and the
interaction of support systems in the stabilisation of tunnel excavations. However, in
comparison to the current design, this methodology now allows the design engineer to make
better estimations of the anticipated demand on the different components of the support
systems, under a defined rock mass environment on engineering principles. This
understanding will give the design engineer greater flexibility, and confidence to design the
appropriate tunnel support system for a specific rock mass and loading condition based on the
often limited availability of different support units in the underground mining environment.Thesis (Ph.D.)-University of Natal, Durban, 1999.
35
Wu, Yu-Chou, and 吳宇宙. "The Study of percentage of completion of basic design of orbital project using the example of Kaohsiung railway underground project." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/31295657027814728367.
Повний текст джерелаАнотація:
碩士國立高雄應用科技大學
土木工程與防災科技研究所
97
During the tender stage of a orbital projects, clients usually provide tender documents which have specification and a set of basic design for bidders to prepare the tender proposal. The tender proposal here generally includes initial design, detailed construction/shop drawings and price quotation. In a turnkey project, the design drawing is not fully completed so uncertainty of cost and construction period is comparatively high. The percentage of design which the client completes in the basic design stage may affect the progress of the procurement and construction of the project significantly. If the percentage is high, the input of ideas and construction feasibility of the contractor is restrained and the chance of giving variation order may be increased. In contrast, if this percentage is low, detailed design provided by the contractor may not be able to satisfy the need of the client. This study is based on the case history of Kaohsiung railway underground project. Various matters are selected for possible indices for discussion of percentage of completion of basic design. The interviews with experts were carried out in order to collect data of influences on cost, construction periods and disputes in the construction from percentage of completion of basic design. The aim of this study is to explore the optimum percentage of completion of basic design and then can provide related information to be a reference for construction of rapid transit system in Taiwan later on. This research analysis plan base supposes completion to push by the descriptive note number estimates approximately 21%-32%, pushes by the person number of months estimates approximately 32%-37%, serves the expense to push estimates approximately 26%, but base of the Gaoxiong KMRT supposes completion to push by the descriptive note number estimates approximately 16%-20%, pushes by the person number of months estimates approximately 21%, to serve the expense to push estimates approximately 17.3%-18.5%, the Gaoxiong railray underground base supposes completion to compare the Gaoxiong KMRT to be high. Key words: Orbital， Basic design， Percentage of completion， Underground civil works
36
WU, CIAO-PEI, and 吳喬培. "Professional Construction Supervision Service Contract Dispute Resolution -Case Study on Kaohsiung Railway Underground Project." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/29354457097591112426.
Повний текст джерелаАнотація:
碩士國立高雄應用科技大學
土木工程與防災科技研究所
101
In recent years, it has become a trend that the construction supervision is outsourced to the consulting/engineering companies among public construction projects. This is mainly caused by the downsizing of the government organization and lack of experienced engineers. As a result, there are more and more contract disputes for professional construction supervision services. In view of this, this research intends to investigate the current practice of construction supervision services and dispute resolution measures through literature review, case study and expert interviews. Especially, the “gray area” in the contracts, drawings and specifications are examined for Kaohsiung Railway Underground projects. In addition, construction dispute cases are studied and dispute resolution measures are analyzed. The research results conclude that the construction supervision services provided by the consultants/engineers should include both quality inspection and clarification of the contracts. The consultants/engineers should clarify the responsibility parties when disputes occurred and seek resolutions among the owners, designers and contractors. Through case study, contract dispute resolution measures are analyzed and summarized for future reference. It is found that the construction supervision plays an important role in coordination and communication between the owners, designers and contractors in contract disputes. The findings in the research provide valuable reference for the construction supervision providers when encountering contract disputes.
37
Wu, Yun-Ching, and 吳昀慶. "A case study of Tainan Railway Underground project: Decision-making processes of urban regime." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2tnswh.
Повний текст джерелаАнотація:
碩士國立臺灣大學
建築與城鄉研究所
107
This thesis aims to use the “Urban Regime Theory” to analyze Tainan’s Railway Underground projects, with a focus on the decision-making process of the above controversial plan. Traditional railway route cut through every city center in Taiwan. Since 1989, the first Underground Project has been done in Taipei city. This infrastructure reconstruction policy has claimed to improve traffic issues, encourage urban renewal, and make development balanced nearby the railway area. However, the significant financial burden of building and maintaining the cost of the railway. In addition, some researchers pointed out that the railway may influence the operation of the TRA system because of the financial problem. The railway underground project tends to increase the ‘’Self-Liquidating Ratio’’ by developing land and privatization of public spaces nearby the railway area. However, the financial plans are rarely accurate, furthermore, they have forced eviction. Despite these problems, this project is still being widely promoted by local politicians. In the case of Tainan, the local urban regime is led by specific party faction governance with complex power and interest. By cooperating with bureaucracies, interest groups, media, professional communities, the specific party faction executed the project boldly. I conclude that this urban regime governance model would be averse to Tainan’s social justice and damaged the government''s finance.
38
chiage, chi-wi, and 蔣奇偉. "A Study of the Hai-an Rd''s underground shopping mall project in Tainan City." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/46596938434286128014.
Повний текст джерелаАнотація:
碩士長榮大學
土地管理與開發研究所(在職專班)
97
''Private participation'' such as BOT (Build, Operate and Transfer) or ROT (Rehabilitate, Operate and Transfer) is the major approach adopted by governments to stimulate the public construction recently, for instance, the construction cases of Taiwan High Speed Rail and the National Museum of Marine Biology and Aquarium in Pingtong County. In the course of encouragement of private participation in the public construction, the project of Hai-an Road Underground Shopping Mall in Tainan City started up in 1993. The underground revitalization project was hauled off owing to be regulated by different laws and strategies. Meanwhile, another similar project, focusing street decoration on the ground, was contracted to revive the southwest area of Tainan City indirectly. This paper is conducted by means of analyzing and inducing references, case study and interview based on the theory concerning the BOT pattern of the private participation in public construction. Moreover, the author points out problems occurred in procedure of the Hai-an Road project management by reviewing the BOT strategy of the case. Hence, the author makes an attempt to find out the possible effects and the correspondent resolution of the case from different perspectives of public and private sectors. Therefore, the author figures out appropriate strategies or patterns in the future as a reference for local governments.
39
Chiang, Chung-Hua, and 江俊華. "Analysis of Schedule Risk Management and Prevention on Large Mechanical and Electrical Engineering Project - Taking Kaohsiung Underground Railway Project as an Example." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/e3w69g.
Повний текст джерелаАнотація:
碩士國立高雄應用科技大學
工業工程與管理系碩士在職專班
104
Project risk management in the implementation of the project life cycle is very important to the progress of construction projects. In the construction process, uncertainties are often encountered. If project risks are not identified, quantified and controlled, these risks are likely to cause project difficulties, and the project will not be completed within contract deadline requirements. As a result, it cannot create the best interests of the project objectives. This study adapted AHP construction questionnaire. Through filling out questionnaires that involve decision-making problems with multiple evaluation criteria by experts in project management fields, assessment factors for priority can be obtained through a systematic approach. By preventing making bad decisions, the purpose of project risk control is achieved. This study uses Electrical and Mechanical Engineering Project of Kaohsiung Railway Underground Program as an example to identify the common seen engineering project risk factors in the aspects of project planning. It is found that subject company uses these 5 items including bad cash flow、unqualified engineer、procurement omission、construction sequence error、imcompliance of as-built and design as main influences factors for planning risk control for an engineering project. By analyzing the important factors and proposing methods to improvement, the purpose of prevention and risk control can be achieved.
40
HSU, WEN-CHIEH, and 許文婕. "Land Justice and Analysis of Regional Differences related to the Underground Railway Construction Project in Tainan." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/66067637974905521387.
Повний текст джерелаАнотація:
碩士國立高雄師範大學
地理學系
104
Construction of the railway system in Tainan began during Qing Dynasty and was completed during Japanese rule of Taiwan. The Tainan train station is now being preserved as a historic site, while the railway divides the city into the east and the west sides, each featuring different landscapes. The planning and development of underground railway in Tainan is currently based on the government’s proposal to “acquire land on east of the original railway, for moving the railway eastward and underground,” which is evaluated as the most efficient and convenient. However, the public sector’s communication with citizens on this issue appears to be insufficient. There are supportive, neutral and opposing voices among households to be relocated. The opponents propose to “move the railway directly beneath its original location, during which the residents are willing to yield land to facilitate construction, but the land needs to be returned to the residents after the construction is completed.” They have also organized a committee to counteract influence from the government. It has become a consensus that the railway in Tainan needs to be relocated underground, in a way that would cause minimal impact. The plan to relocate the railway eastward is used as an example to show that people at different standpoints would have different interpretation and expectations of land justice.
41
YU-WEIHSU and 許昱薇. "Usefulness of communication platform in mitigating controversy: An experimental Case Study on Tainan City railway underground project." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/85aup4.
Повний текст джерелаАнотація:
碩士國立成功大學
交通管理科學系
104
In recently year, conflicts such as the recent labor issues resulting in government policies can not be implemented, such as these events occurred worldwide. Therefore, this study use Grounded theory collected underground railway event in various field experts, academics and stakeholders, as content of neutral platform. Questionnaire will be down before browse platform and after browse platform, but can not be sure the sample is directly related to relocates, and statistical methods paired-samples t test analysis to understand how neutral platform influence people's thinking. The result found that, given a clear information, it will change its mind, and it will be more concerned about the development of the underground railway after understanding more deeply. The results shows the neutral platform can that the public see the diversity of event, and more concerned about the development of events, help to promote policy.
42
Lin, Chen-Wen, and 林志文. "The Political Economy of Delaying：The Case of Hai-an Rd's underground shopping mall project in Tainan city." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/40289217928029382560.
Повний текст джерелаАнотація:
碩士國立成功大學
政治經濟學研究所
95
The project of Hai-an Rd’s underground shopping mall in Tainan City has been begun since the year of 1993. It was aimed at finishing the project within 780 workdays. However, for more than 13 years, it has not been finished yet. The project has been wasted the government resources at least NT$ 2.2 billion. Base on “Principal-agent theory” Literature Analysis, Case study, and Interview research methods are applied to examine the main reasons resulting in the delay of Hai-an Rd’s underground shopping mall. This research will analyze each interaction among the City Hall, City Council, and interest groups (manufactures) as well as its role leading to the project procrastinating. Thus, this research will focus on the following issues: 1. Does the bureaucracy lead to Hai-an Rd’s underground shopping mall procrastinating? What kind of role does the bureaucracy play in the project? 2. Does Tainan City Council lead to Hai-an Rd’s underground shopping mall procrastinating? What kind of role does Tainan City Council play in the project? 3. Do interest groups (manufactures) lead to Hai-an Rd’s underground shopping mall procrastinating? What kind of role do interest groups (manufactures) play in the project? 4. What kind of role do the interactions among the bureaucracy, City Council, and interest groups play in the project? From the research results, the reasons can be (1) the project was dominated by the City Hall bureaucracy. However, compensation for lawsuits caused by the lack of professional knowledge affected the progress of the project. (2) Tainan City Council didn’t dominate the whole project distinctively; therefore “Adverse selection” and “Moral Hazard” were showed. (3) The entanglements resulted from compensation between manufactures and City Government rose continuously.
43
Hung-ChanLo and 羅鴻展. "Three-Dimensional Deep Excavation Simulation and UAV Image Processing - A Preliminary Research of Tainan Underground Railway Project." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/mn92ka.
Повний текст джерела
44
LU, LI-HAN, and 魯勵瀚. "The interruption and countermeasure to the resident and traffic along the railway during the construction of Taipei railway underground project." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/35120323034235653401.
Повний текст джерела
45
Tzu-YunHuang and 黃子芸. "Urban Planning System Study from the View of Actor-centered Institutionalism: A Case Study of Tainan Urban District Railway Underground Project." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/k3vzug.
Повний текст джерелаАнотація:
碩士國立成功大學
都市計劃學系
107
This study focuses on institutions of urban planning system in Taiwan. By aiming to apply actor-centered institutionalism (ACI) framework to study decision-making process of Tainan urban district railway project, this study proposed a research design and used literature analysis, participant observation, in-depth interviews and stakeholder analysis in order to deepen the understanding of how institutions influence the power of plan in planning practices. The study results show that, the interactions between actors and the decision-making of the project are mainly influenced and limited by the institutional environment as following: 1. The hierarchy relationship of Business Initiation and Urban Planning Division makes the review of the Urban Planning Commission only as a procedure without its review function. 2. The multi-interaction relationship between Urban Planning Commission and competent authority, with the power they have, makes the decision-making process only for its legality instead of its legitimacy and rationality. In view of this, this study provides two recommendations: 1. Empower and implement the public participation system. 2. Adjust Urban Planning Commission and the urban planning review system.
46
Li-Ping, Chen, and 陳莉萍. "The study of Cross River Railway on Construction Safety and Maintenance Management–A Project of Underground Railway Tunnel Construction in Kaohsiung City." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/u9h42h.
Повний текст джерелаАнотація:
碩士國立高雄應用科技大學
土木工程與防災科技研究所
103
Underground Railway Tunnel Construction or Railway in 3D Construction has great benefit to city development. Once the construction finished and operated, those undeveloped areas due to railway blocked will be highly improved. In the future, railway system collocating with Kaohsiung MRT, Light Rail Rapid Transit and Taiwan High Speed Rail will consist into a convenient traffic network, enable to distribute large number of crowds and create a new era for city redevelopment in Kaohsiung. In this study, by applying the project of Love River underground railway tunnel construction in Kaohsiung as an example to explore the Hazard Identification of across river railway construction. The questionnaires were issued to the owners who worked in the underground railway tunnel project of Love River in Kaohsiung, supervision units and contractors, etc.. A total of 180 copies were distributed, and 152 copies were returned. The questionnaires were analyzed by SPSS 20.0. through Descriptive Statistics, Reliability Analysis, Independent t-test, Descriptive Statistics Analysis, One-Way ANOVA, Regression Analysis. The study summarized the result of the analysis and presented recommendation as a guide to the future research. The results found that “Construction equipment is too risky to operate in waterfront space,” “Construction prone river seepage water gushing and people drowning,” “Engineers addict to alcoholic beverages,” and “Engineers neglect personal protective equipment" were considered to be the most difficulties under control by the 152 respondents. At the same time, “Facilities for railway engineering manufacturers should fully understand the relevant laws”, and “Railway construction should be participated by contractors who have relevant experience” were agreed by most respondents in order to reduce accidents from happening by applying their experience to judge the best way to work. The information of the study drawn from literature review and questionnaires, to investigate the importance of cross-river railway construction safety, maintenance and management through actual cases and make useful recommendation for Kaohsiung underground railway or other related works to be successfully completed and minimize the industrial safety hazards and accidents.
47
Chou, Yi-Ling, and 周易陵. "A study for Selection and Fee Calculation of Technical Services Providers Entrusted by Entities－ Take the Railway Underground Project as the Example." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/80857943616433376109.
Повний текст джерелаАнотація:
碩士國立臺灣大學
土木工程學研究所
95
Since 「Regulations for Selection and Fee Calculation of Technical Services Providers Entrusted by Entities」Promulgated by Public Construction Commission Executive Yuan in 1999. The calculation of service fees shall be selected among the following methods：(1)Cost plus fee, (2) A percentage to construction expense, (3) Monthly, daily or hourly payment, (4) Consolidated pricing or unit pricing methods. But the entity applies the method of a percentage to construction expense for work usually for easy budget. It had violated the original intension of the regulation. And the technical services fees for professional construction management were not adjusted for 10 years nearly. Along with economic environment change and the increase of services quality and contents requested by the entity, the business of professional construction management (PCM) firms was in distress day by day. Therefore, for conforms to the fair principle, ensure the quality of work and right of the safeguard PCM firms, the current regulation of percentage of the technical services fees to construction expense for professional construction management current regulation has to adjust necessarily and urgently. The thesis takes the railway underground project as the example to discuss the reasonable technical services fees to construction expense for professional construction management. The railway underground project is one of the most difficult civil works. It has a unique characteristic- Must in not affect the existing railway transportation under each railway reconstruction project. The degree of difficulty is very high, but the technical services fees are the same as other civil construction. It is not fair to PCM firm. Therefore for enable the entities understand clearly the PCM firms carry out this type project to need the cost reasonably, the thesis suggests a calculation of professional construction management of technical services and takes two railway underground projects as examples. When the project type correction factor is 1.79, the result is close to other researches over the years, and higher than the regulations. It proves that the suggestive calculation is reasonable and the regulations have the revised range.
48
Feng, Tien-Ming, and 馮天明. "The Application of Self-Compacting Concrete to Underground Diaphragm Wall [Take the Project of Neihu district’s public sport center,Taipei as example]." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/48763444233775766402.
Повний текст джерелаАнотація:
碩士國立交通大學
工學院碩士在職專班營建技術與管理組
95
Abstract Similar to the development of technology, materials and construction methods of civil engineering have also become innovative. Because of this, engineers have obtained better workability, quality of construction and benefits. At present, domestic civil and architectural engineering promote the use of Self-Compacting Concrete (SCC) and seem to be very successful. However, SCC seems to be used less in underground diaphragm walls. Therefore, in our project, we use SCC in underground diaphragm walls and show the pouring process and the results of collections and the comparison analysis. We hope to provide valuable references for similar projects. In addition to the basic tests of strength and mixture of SCC, (such as the strength of compression, bending and splitting, and the characteristics of shrinkage, creep and bonding), this study mainly discusses several problems of the process of pouring SCC into underground diaphragm walls, (such as workability and the quality management), wall deformation after digging, strength detection, leaking examination of diaphragm wall units and cost comparison. By providing a series of examinations and records, we hope to develop the related practical data for reference.
49
Hsue, Yi-Wen, and 許奕文. "Discussion on the Underground Pipeline Corrosion Prevention and Maintenance of PetrochemicalIndustry–Taking the Pipeline Construction of Da-Lin Refinery Plant Project as Example." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/cc62xx.
Повний текст джерелаАнотація:
碩士國立高雄應用科技大學
土木工程與防災科技研究所
103
Petrochemical industry in Taiwan flourishingly developed along with the industrial development. However the pipeline systems may be corrosion, leaks, obstruction, or damage after long-term use. Shocked disaster of petrochemical industry such as Kaohsiung Blast accident last August 1, and Mailiao 6th Naphtha Cracking Plant accidents caused huge damage. One cannot overlook the danger of petrochemical pipeline leaking disaster. Corrosion-resistant coating material of pipelines, which were used over 30 year in Da-Lin refinery plant and its cover soil was affected by the sea tide, was scale off when the new pipeline system construction processed. In this study, we the corrosion-resistant coating material were tested to simulate the aging effect and find the reason for scaling off. Aging test were done by using commercially available 20% concentration of hydrochloric acid and coating material were immersed in this acid solution for 1, 2, 4, 8, 24, and 48 hours. Weight deduction and corrosion depth measurement, tensile strength test and penetration test were done for each immersion period. Experimental results display that corrosion depth and weight deduction happened fast at first 2 hours, and the corrosion-resistant coating material became brittle and easily cracked. Tensile strength decreases with the increase of etching time. Penetration index decrease fast from original 12 to 8, and stop at 7 which is the minimum value of the specification. Those experimental results clearly show that corrosion-resistant coating material will lose function after long-term soaking at sea tide environment. Once petrochemical pipeline leak and cause a fire, it will lead to a major work safety accident. Therefore, it is important to increase environment control before underground pipeline construction and increase inspection frequency after pipeline using. It must have a stratagem to control the pipeline corrosion, consider the related risk, and prepare the anti-corrosion protection to extend the service life and safety of petrochemical pipelines.
50
Chang, Yun-Dung, and 張運東. "The Study of percentage of completion of basic design of turnkey project using the example of underground section of Kaohsiung metro civil works." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/19185034683084156206.
Повний текст джерелаАнотація:
碩士國立高雄應用科技大學
土木工程與防災科技研究所
97
During the tender stage of a turnkey projects, clients usually provide tender documents which have specification and a set of basic design for bidders to prepare the tender proposal. The tender proposal here generally includes initial design, detailed construction/shop drawings and price quotation. In a turnkey project, the design drawing is not fully completed so uncertainty of cost and construction period is comparatively high. The percentage of design which the client completes in the basic design stage may affect the progress of the procurement and construction of the project significantly. If the percentage is high, the input of ideas and construction feasibility of the contractor is restrained and the chance of giving variation order may be increased. In contrast, if this percentage is low, detailed design provided by the contractor may not be able to satisfy the need of the client. This study is based on the case history of civil works of Kaohsiung metro underground section. Various matters are selected for possible indices for discussion of percentage of completion of basic design. The interviews with experts were carried out in order to collect data of influences on cost, construction periods and disputes in the construction from percentage of completion of basic design. The aim of this study is to explore the optimum percentage of completion of basic design and then can provide related information to be a reference for construction of rapid transit system in Taiwan later on. It was found from this study that client and concessionaire have to establish a good framework and quality control of design management as well as approval procedure. Process of document review and approval need to be simplified and review schedule has to be well- controlled. Guideline of “inquires in performance” shall be clearly determined To prevent the delay of progress of design of civil works, the requirement of core system shall be given as earlier as possible.