Готові списки джерел за темами / Tunnelling and underground project

Добірка наукової літератури з теми "Tunnelling and underground project"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Tunnelling and underground project"

1

Yazdani-Chamzini, Abdolreza. "PROPOSING A NEW METHODOLOGY BASED ON FUZZY LOGIC FOR TUNNELLING RISK ASSESSMENT." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 20, no. 1 (March 10, 2014): 82–94. http://dx.doi.org/10.3846/13923730.2013.843583.

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Анотація:
Tunnels are artificial underground spaces that provide a capacity for particular goals such as storage, under-ground transportation, mine development, power and water treatment plants, civil defence. This shows that the tunnel construction is a key activity in developing infrastructure projects. In many situations, tunnelling projects find themselves involved in the situations where unexpected conditions threaten the continuity of the project. Such situations can arise from the prior knowledge limited by the underground unknown conditions. Therefore, a risk analysis that can take into account the uncertainties associated with the underground projects is needed to assess the existing risks and prioritize them for further protective measures and decisions in order to reduce, mitigate and/or even eliminate the risks involved in the project. For this reason, this paper proposes a risk assessment model based on the concepts of fuzzy set theory to evaluate risk events during the tunnel construction operations. To show the effectiveness of the proposed model, the results of the model are compared with those of the conventional risk assessment. The results demonstrate that the fuzzy inference system has a great potential to accurately model such problems.
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2

Vu, Ngan Minh. "Stability analysis when tunnelling in soft soil condition in Hochiminh city." Journal of Mining and Earth Sciences 63, no. 3a (July 31, 2022): 41–49. http://dx.doi.org/10.46326/jmes.2022.63(3a).05.

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The rapid development in the economy and the urban population in cities in Vietnam in recent years leads to dramatic growth in traffic congestion, noise and air pollution, and environmental degradation. Urban underground infrastructure thus becomes an inevitable solution since the surface space becomes too expensive and restricted in spite of the high cost of tunnel construction. However, tunnelling in deltaic urban areas, in particular in the cases of Mekong Delta and Red River Delta areas, often faces to difficulties of soft soil conditions and the existence of important historical buildings on the surface. The first metro line constructed in Vietnam from Ben Thanh to Suoi Tien, which is located under crowded areas of Hochiminh city, was tunnelled in such conditions. This paper presents a back analysis for the stability of the tunnelling process in the project. The minimum support pressures is estimated by using the wedge model proposed by Jancsecz, S., & Steiner, W. (1994). Meanwhile, the maximum support pressure is estimated by the blow-out model proposed by Vu et al. (2016). Based on these results, the range of support pressures recommended for the Earth Pressure Balance Tunnel Boring Machine in the Hochiminh Metro Line No.1 project soft soil conditions is derived and compared to in situ support pressures obtained from the monitoring data in this tunnelling project. The study result shows a good agreement between the support pressures obtained from stability analysis models and the monitoring data from the construction site. Based on this back analysis, some recommendations are proposed with the purpose of successful construction in the next tunnelling projects in Hochiminh city.
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3

Cao, Rui Lang, Shao Hui He, Fang Wang, and Fa Lin Qi. "Stability Analysis of Large Underground Station Based on Coupled Fluid-Solid Theorem." Advanced Materials Research 748 (August 2013): 1104–8. http://dx.doi.org/10.4028/www.scientific.net/amr.748.1104.

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Анотація:
Tunnelling may disturb the intrinsic balance of a stratum, and result in accidents like caving or gushing. In order to assess the security of underground station project, numerical analysis for the stability of surrounding rock was done with fast Lagrangian analysis of continua in three dimensions (FLAC3D), Multiple factors were considered, including surrounding rock classes, tunnel depths, groundwater tables, construction methods and initial supporting systems. According to the results of principal stresses, displacements, plastic zones, pore pressure distribution and the mechanical characters of supporting system including anchors and shotcrete, the seepage mechanism of underground station has been discussed. The pore pressure distribution of deep-buried tunnel was studied as well. The study results can provide a theoretical basis for the design of tunnel and underground works in aquifer strata.
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4

Fu, Yong, Jun Hu, Jia Liu, Shengbin Hu, Yunhui Yuan, and Hui Zeng. "Finite Element Analysis of Natural Thawing Heat Transfer of Artificial Frozen Soil in Shield-Driven Tunnelling." Advances in Civil Engineering 2020 (August 31, 2020): 1–18. http://dx.doi.org/10.1155/2020/2769064.

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Анотація:
The technology of artificial horizontal freezing method is increasingly being used in the soil reinforcement of urban underground projects such as shield-driven tunnelling. Compared with the freezing process, the thawing process is more complicated, and the thawing behavior of artificial frozen soil surrounding shield-driven tunnels has not been well investigated in both the academic and industrial domains. This study, therefore, aims to investigate the natural thawing heat transfer behavior of artificial horizontal frozen soil in shield-driven tunnelling using a three-dimensional finite element method. The finite element modelling is based on the horizontal freezing reinforcement project of Chating Station to Jiqingmen Station Tunnel in the Nanjing Metro Line 2. Validation between finite element results and site measured results is firstly conducted. The natural thawing temperature field contours as well as the radial and longitudinal distributions of natural thawing temperature in the frozen soil surrounding the tunnel are then explicitly examined. Furthermore, sensitivity analysis of influencing factors such as the thermal conductivity, latent heat of phase change, ambient temperature inside tunnel, freezing time, and original ground temperature is carried out. The results and findings of this study may enrich the current limited database and enable a better understanding of natural thawing heat transfer behavior of artificial frozen soil in shield-driven tunnelling.
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5

Chang, Xue Sen. "Underground Tunnel Development Survey of Shield Tunnelling Machine." Advanced Materials Research 299-300 (July 2011): 1111–14. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.1111.

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Анотація:
In this paper, the technology based on site investigation adequately, through reading, analysis and comprehensive vast literature of shield lining segments, installed spelling were analyzed, and the conclusion that some valuable conclusions. Summarizes the construction process of shield technology, and introduces the earth pressure balance type shield construction machine structure and working principle. Shield technology is with modern transportation, underground engineering, mining, water conservancy projects and municipal construction needs and developed advanced tunnel construction technology. With China's urban underground transportation facilities, the quickening of the process of shield technology has become the hotspot of domestic engineering.
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6

Méndez, Fidencio. "Aguamilpa underground penstocks — excavation phase." Canadian Journal of Civil Engineering 21, no. 4 (August 1, 1994): 585–95. http://dx.doi.org/10.1139/l94-060.

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Анотація:
The Aguamilpa hydroelectric project is one of a number of hydroelectric schemes currently being constructed along the course of the Santiago River in western Mexico. Aguamilpa, with a total cost of $750 million U.S., is a 960 MW installation scheduled for operation by October 1993. As the most important plant in the complex, Aguamilpa qualifies as one of the more spectacular engineering construction jobs of the decade in Mexico. The facility is composed of a complex set of tunnels, including the underground penstocks, the powerhouse and surge chamber caverns, the tailrace tunnel, and temporary tunnels. In the initial design, most of the tunnelling work was to have been of a permanent nature. However, as the date of completion was brought forward, it became necessary to open up more working faces and as such a number of temporary tunnels were started. This paper presents the sequences of underground penstocks excavation, the construction methods developed, and the equipment employed. Also, the complex patterns of tunnels that were drilled initially for access and to facilitate later excavation of the underground penstocks are described. Key words: tunnels, underground penstocks, powerhouse, construction methods.
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7

Choudhary, NInad. "Analysing the Effect of Tunnel Construction on Existing Structure by Using Analytical and Numerical Method." International Journal for Research in Applied Science and Engineering Technology 9, no. VII (July 31, 2021): 3961–71. http://dx.doi.org/10.22214/ijraset.2021.37104.

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Анотація:
Underground construction in urban areas is a challenging work to carry out and includes a lot of factors to be considered. In varying geological conditions, it becomes very difficult as there are various faults and fracture, so it requires a proper investigation to be done before starting of the project. The aim of this report is to determine the effects of tunneling on existing structures and tunnel surrounding due to tunnelling work, like crack in structure, vibrations caused to the above structure and ground settlement. To identify the movements caused and giving a solution by using the RS2 software and deciding the best suitable method for Construction of tunnel.
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Heunecke, Otto, and Wolfgang Liebl. "Accuracy and reliability of gyro measurements at today’s tunnelling projects." Journal of Applied Geodesy 12, no. 1 (January 26, 2018): 95–107. http://dx.doi.org/10.1515/jag-2017-0035.

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Abstract Gyro theodolites – briefly gyros – allow the orientation transfer from a reference line to another line without need for a connecting geodetic network. They are routinely used for orientation control of networks in tunnelling projects. This is currently the only way to stabilize accuracy and reliability in tunnelling networks and is indispensable with respect of today’s requirements for excavation and breakthrough accuracy. In order to archive a reliable assessment of correctness, the measuring method has to be planned in a way that systematic influences in the determination of an underground directional angle are minimized. For this purpose, the principle of differential measurements is used for an azimuth determination both in terms of time as well as in space. All required corrections and reductions must be considered correctly to obtain the directional angle of interest with a measurement uncertainty less than 1 mgon ($\stackrel{\wedge }{=}3.{3^{\prime\prime }}$). Some accuracy considerations obtained from own experiences are discussed to state whether the specified standard deviations of the used gyros according to DIN 18723-7 can be confirmed.
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Ayasrah, Mo'men, Hongsheng Qiu, Xiedong Zhang, and Mohammad Daddow. "Prediction of Ground Settlement Induced by Slurry Shield Tunnelling in Granular Soils." Civil Engineering Journal 6, no. 12 (November 30, 2020): 2273–89. http://dx.doi.org/10.28991/cej-2020-03091617.

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Анотація:
Underground structures play an important role in achieving the requirements of rapid urban development such as tunnels, parking garages, facilities, etc. To achieve what is needed, new transportation methods have been proposed to solve traffic congestion problems by using of high-speed railway and subway tunnels. One of the issues in urban spaces due to tunnel excavation is considerable surface settlements that also induce problems for surface structures. There are a variety of published relationships concerned with field measurements and theoretical approaches to evaluating the amount of the maximum surface settlement value due to tunneling. This paper studies the ground surface settlement caused by the Greater Cairo Metro – Line 3 - Phase-1. This project was constructed by a slurry shield Tunnel Boring Machine (TBM). Therefore, this work consists of two parts. The first part presents the details of the project and monitoring results field and laboratory geotechnical investigations in order to determine the soil properties. The second part is to the comparison between the field measurements and theoretical approaches for surface settlement due to tunneling construction. At the end of the works, the results show that the more convenient methods which approach the field measurements, and the major transverse settlement occurs within the area about 2.6 times the diameter of the tunnel excavation. Doi: 10.28991/cej-2020-03091617 Full Text: PDF
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10

Ruwanpura, J. Y., S. M. AbouRizk, and M. Allouche. "Analytical methods to reduce uncertainty in tunnel construction projects." Canadian Journal of Civil Engineering 31, no. 2 (February 1, 2004): 345–60. http://dx.doi.org/10.1139/l03-105.

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Анотація:
This paper presents a method to quantify uncertainty using simulation techniques and approximate geotechnical methods. Unknown soil conditions are major contributors to uncertainty in any underground construction project. Soil conditions are unknown because generally soil samples taken from vertical boreholes show only the soils present in the discrete borehole locations. The soil profiles between the boreholes therefore contribute to project uncertainty, and construction practitioners must make assumptions about these soil profiles for construction planning and scheduling purposes. Analytical and simulation methods are presented to accurately predict soil profiles between boreholes and reduce uncertainty in a "rough and ready" fashion. These methods use existing borehole data to create an analytical model for soil prediction, which is then incorporated with a process interaction simulation model of the construction project using special purpose simulation concepts and advanced geotechnical characterization techniques. The application of these methods to an Edmonton tunnel construction project is also detailed. Construction engineers or managers can use these simulation methods to strengthen the geological data obtained for the construction project.Key words: borehole data, construction, risk, soil families, soil profiles, soil transitions, special purpose simulation, tunnelling, uncertainty.
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Більше джерел

Дисертації з теми "Tunnelling and underground project"

1

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.

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Анотація:
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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2

Anderson, John Muter. "The identification and control of risk in underground construction." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/7117.

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Анотація:
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.
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Gleason, Johanna. "The underground railroad." CSUSB ScholarWorks, 1993. https://scholarworks.lib.csusb.edu/etd-project/685.

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4

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.

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5

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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6

Surarak, Chanaton. "Geotechnical Aspects of the Bangkok MRT Blue Line Project." Thesis, Griffith University, 2011. http://hdl.handle.net/10072/367320.

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Анотація:
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
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7

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.

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Анотація:
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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8

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.

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Анотація:
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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9

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.

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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.

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Книги з теми "Tunnelling and underground project"

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India) Tunnelling Asia' 2013 (2013 New Delhi. Tunnelling Asia' 2013: Using underground space for infrastructure projects : issues & challenges, 26-28 February, 2013, New Delhi, India : proceedings. Edited by Ramamurthy, T., editor of compilation, Kanjlia, V. K., editor of compilation, Gupta, A. C., editor of compilation, India. Central Board of Irrigation and Power, International Tunnelling and Underground Space Association, and Tunnelling Association of India. New Delhi]: [Central Board of Irrigation and Power], 2013.

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Association, International Tunnelling. Tunnelling and underground space technology. Oxford: Pergamon Press, 1986.

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Norwegian Soil and Rock Engineering Association., ed. Norwegian hydropower tunnelling. Trondheim: Tapir Publishing, University of Trondheim, 1985.

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Attewell, P. B. Tunnelling contracts and site investigation. London: E & FN Spon, 1995.

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International Congress Towards New Worlds in Tunnelling (1992 Acapulco, Mexico). Towards new worlds in tunnelling: Proceedings of the International Congress Towards New Worlds in Tunnelling, Acapulco, 16-20 May 1992. Rotterdam: A.A. Balkema, 1992.

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Jahed Armaghani, Danial, and Aydin Azizi. Applications of Artificial Intelligence in Tunnelling and Underground Space Technology. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1034-9.

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Zhang, Dongmei, and Xin Huang, eds. Proceedings of GeoShanghai 2018 International Conference: Tunnelling and Underground Construction. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0017-2.

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Tunnelling Association of Canada. General meeting. Tunnelling in the 90's: Eighth annual general meeting, October 31-November 2, 1990, Vancouver, B.C. Vancouver: BiTech Publishers, 1990.

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Canadian Tunnelling Conference (10th 1992 Banff, Alta.). Proceedings: 10th annual Canadian Tunnelling Conference : Underground works, past, present and future = Comptes rendus : 10e Conférence annuelle Canadienne des Tunnels : les ouvrages soubterrains du passé, du présent et du futur : September 30, October 1-3, 1992, Banff, Alberta, Canada. [Toronto, Ont.]: The Tunnelling Association of Canada,[, 1992.

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International Congress on Progress and Innovation in Tunnelling (1989 Toronto, Ont.). Proceedings of the International Congress on Progress and Innovation in Tunnelling. [s.l: s.n.], 1990.

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Частини книг з теми "Tunnelling and underground project"

1

Burgess, K. T., and M. C. Knights. "Underground works on Third Nairobi Water Supply Project." In Tunnelling’ 94, 101–15. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2646-9_7.

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Arthur, L. J., A. W. Darby, and B. Rafoneke. "Lesotho Highlands Water Project: design and layout of underground works for ’Muela Hydropower Project." In Tunnelling’ 94, 3–13. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2646-9_1.

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Nasekhian, A., C. Anthony, B. Haig, M. Dewhirst, J. Ares, and C. Barker. "Tunnelling in urban areas and pile interception challenges – a case study: Bank station upgrade project (BSCU)." In Geotechnical Aspects of Underground Construction in Soft Ground. 2nd Edition, 98–107. 2nd ed. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003355595-13.

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Zoppis, E., and A. M. Baldi. "Gilgel Gibe II hydropower project in Ethiopia; TBM Tunnelling, when the rock turns into mud: Analysis of a major collapse, its causes and solutions." In Geotechnical Aspects of Underground Construction in Soft Ground. 2nd Edition, 199–207. 2nd ed. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003355595-26.

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Yu, Hai-Sui. "Underground Excavations and Tunnelling." In Cavity Expansion Methods in Geomechanics, 309–59. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9596-4_10.

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Deane, A. P. "Application of NATM to design of underground stations in London Clay." In Tunnelling’ 94, 87–97. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2646-9_6.

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di Prisco, C., L. Flessati, D. Peila, and E. M. Pizzarotti. "Risk management in tunnelling." In Handbook on Tunnels and Underground Works, 13–22. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003256175-2.

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Wone, M., V. Nasri, and M. Ryzhevskiy. "Rock tunnelling challenges in Manhattan." In (Re)Claiming the Underground Space, 145–51. London: Routledge, 2022. http://dx.doi.org/10.1201/9780203741184-26.

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Bucek, M., M. Hert, and R. Smida. "Tunnelling in an undermined area." In (Re)Claiming the Underground Space, 543–49. London: Routledge, 2022. http://dx.doi.org/10.1201/9780203741184-94.

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Oswell, M. A., I. W. Farmer, and B. W. L. Mak. "Design and construction of caverns for an underground sewage treatment plant, Hong Kong." In Tunnelling’ 94, 117–35. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2646-9_8.

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Тези доповідей конференцій з теми "Tunnelling and underground project"

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Dewanjee, Biswanath. "Challenge in Tunnelling for Kolkata East West Metro – Passage of underground twin tunnels in the vicinity of Brabourne Road Flyover." In IABSE Conference, Kuala Lumpur 2018: Engineering the Developing World. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.0822.

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<p>The global trend of development of underground urban infrastructural facilities have come across in India too as majority of MRTS corridor projects involves tunnelling in busy districts of the city. In the context of the city of Kolkata, which is developed over a span of more than 300 years in changing regime with heterogeneous development authorities and policies, planning for an underground metro corridor encompasses diverse administrative &amp; technological challenges. A major challenge of crossing of underground tunnel of East West Metro corridor in close vicinity of pile foundation of an extremely busy flyover viaduct structure is showcased in this paper to demonstrate the successful mitigation of this criticality by adopting systematic analysis &amp; procedures. In this context, the paper covers Geomorphology &amp; Geotechnical investigation &amp; its impact on choice of tunnel boring machine, building condition survey and structural impact assessment and mitigative planning adopted. The theoretical prediction of tunnelling impact is compared with actual settlement and other tunnelling parameters.</p>
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Mehryaar, Ehsan, and Matthew J. Bandelt. "Geological Modeling Along Tunnel Projects Using Machine Learning Techniques." In International Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/igs-2022-165.

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Abstract Tunnels offer considerable benefits over other alternative forms of transportation infrastructure. For example, in contrast to highways, tunnels ensure unobstructed land above remains available for all forms of land-use that can present notable economic, social, and environmental advantages. This feature is important in highly urbanized areas where usable land is scarce and acquiring land can put high financial pressure on available budgets. Tunnelling uncertainty is the main contributor to cost overruns which are mainly due to geological uncertainity. Therefore, accurate prediction of geological characteristics can lead to higher efficiency of tunnelling projects and prevent any cost or time overruns. In this paper, a random forest (RF) approach is utilized to model underground lithology using 65 boreholes along a tunnel project. In order to acquire best hyper parameters for the RF model a random search optimization algorithm is used. Also, different intervals along the boreholes are used to extract the lithology to find the sensitivity of the model to different interval length. The results show that the proposed model can predict the lithology with 86 percent accuracy. The model was successful in prediction of lithology type and their order along the boreholes in a case study example. Introduction Tunnels offer considerable benefits over other alternative forms of transportation infrastructure in terms of land-use and planning. This feature allows for greater flexibility in use of lands in highly urbanized areas where usable land is scarce and acquiring land can put high financial pressure on available budgets. Tunnelling uncertainty is the main contributor to cost over runs the which is mainly due to geological uncertainity. Therefore, accurate prediction of geological characteristics can lead to higher efficiency of tunnelling projects and prevent any cost or time overruns (Yan-lin et al. 2011; Hossin and Sulaiman 2015; Zhang and Zhu 2018).
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Chen, K., Y. Liu, R. Hu, and W. Fang. "A digital twin-driven deformation monitoring system for deep foundation pit excavation." In The 29th EG-ICE International Workshop on Intelligent Computing in Engineering. EG-ICE, 2022. http://dx.doi.org/10.7146/aul.455.c205.

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Deformation happening in deep foundation pit excavation is a growing concern to underground construction, threatening not only the construction safety but also the adjacent environment. Traditional deformation monitoring is conducted once a day through the method of manual measurement. Such monitoring strategy has been blamed for inefficiency and error-prone, and also the monitoring results cannot be timely received by on-site managers for safety management. Therefore, the study proposes a digital twin-driven deformation monitoring system to support accurate risk-preventing decisions. The proposed system comprises four interconnected components for data acquisition, data processing, result visualization, and risk warning, respectively. A real-life tunnelling construction project – Lianghu tunnelling construction in Wuhan, China – is used to illustrate the functionality of the proposed system. Findings show that the system will be a valuable step for implementing digital twin to deep foundation pit excavation from concept to practice.
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Vyas, Sandeep H. "EWPL CP System: A Case Study." In ASME 2013 India Oil and Gas Pipeline Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/iogpc2013-9808.

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Reliance Gas Transportation Infrastructure Limited (RGTIL) is operating its prestigious East-West Gas pipeline (EWPL), since 2008–2009; project comprising of 48” dia. 1375 km long trunk pipeline, with 11 nos of compressor stations and several spur lines of different diameters varying from 10” to 30”. Cathodic Protection (CP) system for buried pipeline, piping and structures is critical for ensuring protection against external corrosion due to environmental interaction. For successful implementation of CP system from day one of pipeline laying; planning and considerations starts at conceptual stage of project itself, then proper planning, design and implementation to follow. Other than considerable length and diameter of pipeline; uniqueness for EWPL CP requirements are in form of 3 nos. Micro-tunnel crossings, 11 nos of Compressor stations (CS) with underground piping, more than 100 cased crossings, several HDD, third-party pipelines, AC & DC Railway traction crossings and pipeline passing through different geography from East to West. Paper discusses the implementation of CP system for EWPL; highlighting critical points for execution of the job in each phase from Engineering till commissioning and O&M, CS CP system, CP for pipe within Micro-tunnelling, several interference and mitigation actions, post-commissioning surveys etc.
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Liu, Yiyan, Sinan Acikgoz, and Harvey Burd. "Terrestrial Laser Scanning based deformation monitoring for masonry buildings subjected to ground movements induced by underground construction." In 5th Joint International Symposium on Deformation Monitoring. Valencia: Editorial de la Universitat Politècnica de València, 2022. http://dx.doi.org/10.4995/jisdm2022.2022.13872.

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Tunnelling and deep excavation activities cause ground movements. Monitoring the influence of these ground movements on nearby surface assets is a major component of urban underground construction projects. Such projects often require large-scale and comprehensive monitoring of nearby buildings to track displacements and identify structural damage. Masonry assets are particularly vulnerable to ground movements due to the low tensile strength of the material; these structures may experience unsightly cracking and structural stability issues. Current monitoring practice for these buildings is labour intensive and cannot fully characterise the response of the assets due to the limited number of measurement points. This paper presents a non-contact monitoring solution using terrestrial laser scan (TLS) data, which develops a modified non-rigid iterative closest point (N-ICP) algorithm. This algorithm optimises the displacement fields by establishing point to point correspondences that penalise non-smooth deformations and deviations from landmarks (i.e. feature points where displacements are known). The algorithm outputs rich 3D displacement fields that can be used in established assessment and decision-making procedures. To demonstrate this algorithm's ability to estimate 3D displacement fields from point clouds, several synthetic datasets are processed in this study. The results demonstrate the algorithm's potential for recovering underlying deformations with the help of landmarks and optimisation weightings.
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Tapia, Andres, and Alfonso Farias. "Rock forecast tool: new tool for rock mass quality prediction in tunnelling." In Second International Conference on Underground Mining Technology. Australian Centre for Geomechanics, Perth, 2020. http://dx.doi.org/10.36487/acg_repo/2035_02.

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Barla, G. "Applications of numerical methods in tunnelling and underground excavations: Recent trends." In The 2016 Isrm International Symposium, Eurock 2016. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315388502-7.

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Li, Duanshun, Sheng Mao, Ming Lu, and Xuesong Shen. "Analytical Tunnel-Boring Machine Pose Precision and Sensitivity Evaluation for Underground Tunnelling." In 32nd International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2015. http://dx.doi.org/10.22260/isarc2015/0074.

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Subrahmanya, Gudge. "Urban Tunnelling in Mixed soil conditions, A study of tunnelling works in Bangalore Metro Rail Project, India." In Recent Advances in Rock Engineering (RARE 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/rare-16.2016.65.

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Green, Jeremy. "Underground mining robot: A CSIR project." In 2012 IEEE International Symposium on Safety, Security, and Rescue Robotics (SSRR). IEEE, 2012. http://dx.doi.org/10.1109/ssrr.2012.6523868.

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Звіти організацій з теми "Tunnelling and underground project"

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D. Steve Dennis. Underground Coal Gasification Test Project. Office of Scientific and Technical Information (OSTI), December 2005. http://dx.doi.org/10.2172/914533.

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Author, Not Given. Underground Test Area Project Waste Management Plan, Revision 3. Office of Scientific and Technical Information (OSTI), May 2009. http://dx.doi.org/10.2172/1432809.

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Davis, B. DAS Fiber Emplacement in Underground Tunnel – System Engineering Project. Office of Scientific and Technical Information (OSTI), July 2021. http://dx.doi.org/10.2172/1808757.

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Newmark, R. L., and R. D. Aines. Summary of the LLNL gasoline spill demonstration - dynamic underground stripping project. Office of Scientific and Technical Information (OSTI), April 1995. http://dx.doi.org/10.2172/61722.

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Eaton, G., V. Genetti, Q. Hu, G. Hudson, A. Kersting, R. Lindvall, J. Moran, et al. Hydrologic Resources Management Program and Underground Test Area Project FY2005 Progress Report. Office of Scientific and Technical Information (OSTI), March 2007. http://dx.doi.org/10.2172/919618.

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IT Corporation, Las Vegas. Underground Test Area Project Waste Management Plan (Rev. No. 2, April 2002). Office of Scientific and Technical Information (OSTI), April 2002. http://dx.doi.org/10.2172/801229.

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Davisson, M. L., G. F. Eaton, N. L. Hakemi, G. B. Hudson, I. D. Hutcheon, C. A. Lau, A. B. Kersting, et al. Hydrologic Resources Management Program and Underground Test Area Project FY 2000 Progress Report. Office of Scientific and Technical Information (OSTI), July 2001. http://dx.doi.org/10.2172/15005127.

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J, B., E. F, E. K, F. L, H. J, H. Max, H. Bryant, et al. Hydrologic Resources Management Program and Underground Tests Area Project FY 2003 Progress Report. Office of Scientific and Technical Information (OSTI), August 2004. http://dx.doi.org/10.2172/918407.

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Loubriel, G., J. Aurand, M. Buttram, F. Zutavern, D. Brown, and W. Helgeson. Final report of LDRD project: Electromagnetic impulse radar for detection of underground structures. Office of Scientific and Technical Information (OSTI), March 1998. http://dx.doi.org/10.2172/658402.

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Culham, H., G. Eaton, V. Genetti, Q. Hu, A. Kersting, R. Lindvall, J. Moran, et al. Hydrologic Resources Management Program and Underground Test Area Project FY 2006 Progress Report. Office of Scientific and Technical Information (OSTI), April 2008. http://dx.doi.org/10.2172/945573.

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