Dissertations / Theses on the topic 'Underground pipelines Design and construction'
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1
Almardy, Mohamed. "Design of fuzzy logic controller for the cathodic protection of underground pipelines." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0007/MQ43133.pdf.
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羅思偉 and Sze-wai Ben Law. "Investigating the urban underground dimension: Hong Kong in the state of flux." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31980405.
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Cantin, G. M. Delphine. "An investigation of the formation of hollow bead defects in pipeline field welds /." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phc231.pdf.
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Winning, Herbert Keith. "Application and development of advanced engineering geographical information systems for pipeline design." Thesis, Coventry University, 2015. http://curve.coventry.ac.uk/open/items/4e581e2a-9d09-4b76-ace2-d76d22354719/1.
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This thesis proposes the use of an Advanced Engineering Geographical Information System (AEGIS) for the improved design of onshore pipelines, from concept to operation. The system is novel in that it is function rather than discipline or software specific. The thesis statement has been developed, and an aim and set of research objectives identified (along with the success criteria for the evaluation of the system), based on a review of current pipeline design methods. Drawing on a design science research methodology (DSRM), the thesis proposes the development of the system as an artefact in order to validate the proposed constructs, models, methods and implementations. The thesis discusses the underlying issues of data interoperability, the application of open data standards, and the integration of computer aided design (CAD) and geographical information systems (GIS). These challenges are addressed in the thesis and demonstrated through the implementation of the system. To support the development of the system, research was undertaken in the fields of pipeline engineering, environmental engineering and engineering design. As part of this research, a number of peer-reviewed journal papers were published, and conference papers presented in Kampala, Houston, London and Split. These papers covered the key fields contained in the thesis including, fluid mechanics, bio-systems engineering, environmental engineering, CAD/GIS integration (CGI), and the application and development of geospatial pipeline data models. The thesis concludes that the approach is valid, offering significant improvement across all fields compared to the current method of pipeline design. By taking a functional approach to the challenges of the design of pipelines, a system has been developed that addresses the requirements of the pipeline engineer, environmental engineer and engineering designer. The system enables the user to select the software of their choice, thereby reducing the problems associated with data interoperability, retraining and system integration. The sharing of data and outputs from analysis carried out within the system, provides an integrated approach, which can subsequently be used for the integrity management of the pipeline during the operational phase of the project. The scope for further development of this approach to pipeline design is also discussed. In addition to the inclusion of further engineering and environmental analysis, there is the potential for using the system for the design of subsea pipelines.
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Pasha, Faiq Hussain 1959. "Optimal control of a valve to avoid column separation and minimize waterhammer pressures in a pipeline." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/558105.
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Sarkamo, J. (Juho). "Design, construction and commissioning of the EMMA experiment." Doctoral thesis, University of Oulu, 2014. http://urn.fi/urn:isbn:9789526205694.
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Abstract
The work describes the design, construction and commissioning of the underground cosmic-ray experiment Experiment with MultiMuon Array (EMMA). The experiment is built into the Pyhäsalmi mine, in the town of Pyhäjärvi, Finland. The aim of EMMA is to determine the elemental composition of cosmic rays at an energy region around 4 PeV, the energy region called the ’knee’ region. This is achieved by measuring the lateral density distribution of high-energy muons originating from Extensive Air Showers (EAS).
The design calculations for the EMMA experiment, which are based on the use of the parametrization of the lateral density distribution of muons, the method of shower reconstruction, and the energy and composition indicators, are presented. A strategy for reconstructing the composition of the cosmic rays is presented and it demonstrates the potential of applying unfolding techniques to the EMMA data. The effect of an array extension on the performance of EMMA is studied.
The hardware used in the EMMA experiment is presented starting with an overview of the array and its detector stations. The EMMA array employs three different particle detectors, for which the main technical properties are given, and their use in the EMMA array is presented. A description of the infrastructure of the experiment is given and the rock overburden at the EMMA site at the depth of 80 metres is documented.
The work contains the latest analysis of EAS data recorded by the tracking detectors of the experiment, which demonstrates that the experiment is taking data as planned and that the data are according to EAS physics expectations. Methods for event selection and tracking efficiency correction are presented, after which the analysis results of measured track multiplicity spectra are given. The shape of the recorded multiplicity spectrum indicates that the simplest model of a knee-like spectrum with a pure proton composition can not explain the data and that further analysis of the spectrum is required.
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O'hashi, Kazuhiko. "STUDY ON THE UNIQUE DESIGN, CONSTRUCTION AND OPERATION OF GUS PIPELINES IN THE PERMAFROST OF EAST SIBERIA." Kyoto University, 1998. http://hdl.handle.net/2433/157023.
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本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものであるKyoto University (京都大学)
0048
新制・論文博士
博士(工学)
乙第9757号
論工博第3298号
新制||工||1099(附属図書館)
UT51-98-C211
(主査)教授 小野 紘一, 教授 田村 武, 教授 岡 二三生
学位規則第4条第2項該当
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Snodgrass, Robert E. "Mitigation of hazards posed by explosions in underground electrical vaults." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/19019.
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Snyman, M. F. "Numerical modelling of an offshore pipeline laid from a barge." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/21804.
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Bibliography: pages 81-85.This thesis addresses some of the issues involved in using numerical methods to simulate the laying of an offshore pipeline, the objective being to contribute to the expertise of the South African offshore technology. Of particular interest is the prediction of the stresses in the pipe during such an event. The thesis concentrates on the use and suitability of the finite element method to simulate the important aspects of the pipelaying problem. ABAQUS, a nonlinear general purpose finite element code, was chosen as numerical tool, and nonlinear effects such as geometry and drag, as well as contact and lift-off at the boundaries, are included in the models. The analysis is performed in two parts: in the static analysis the displaced equilibrium position of the pipeline under self weight, buoyancy and barge tension is sought, whilst the response due to wave action and barge motion is of interest in the dynamic analysis. Numerical experiments show the suitability of ABAQUS to model the behaviour of slender structures under both static loads and dynamic excitations.
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Walsh, Bryan P. "Thermal and mechanical analysis of an explosion in an underground electrical vault." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17317.
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Low, Yee Weng. "Techno-economic model for designing marine and offshore power generating systems." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/15868.
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Yargici, Volkan. "Assessment Of Buried Pipeline Performance During The 1999 Duzce Earthquake." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1063197/index.pdf.
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The goal of this study is to develop probabilistically based
empirical correlations for seismic performance assessment of buried
pipelines. Within the scope of these research efforts, pipeline
performance case histories have been compiled from Duzce city after
Duzce earthquake. The characteristics of Duzce water supply and
distribution system with the earthquake damage on the system were
studied. Correlations of the damage patterns with the water distribution
system, earthquake and geotechnical characteristics have been
developed. Moreover spatial distributions of the earthquake effects havebeen transferred into Geographic Information System (GIS) format. As a
result of these studies, it was intended to define the seismic,
geotechnical and structural parameters which may explain the spatial
variability of the observed seismic pipeline hazard.
For the development of such correlations, a maximum likelihood
framework for the probabilistic assessment of seismically induced buried
pipeline performance is described. A database, consisting of postearthquake
field observations of buried pipeline performance after Duzce
earthquake in conjunction with in-situ index test results, is used for the
development of probabilistically based seismic pipeline performance
correlations. As a result of careful processing of available data, the
variables of the problem are selected as: liquefaction susceptibility of
soil, thickness of soft soil layer if it exists, peak ground acceleration and
estimated ground deformations. A limit state function is defined in terms
of these variables. Repairs on the pipeline system due to earthquake are
compiled with the surrounding soil and earthquake parameters and the
correlations of pipeline performances with the mentioned variables are
determined. Different sets of fragility curves are developed for seismic
pipeline performance problem, representing various sources of
uncertainty that are intrinsic to the problem. Such information is believed
to be useful to utility system operators in planning a seismic retrofit or
upgrade program for existing pipeline systems.
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Oge, Ibrahim Ferid. "Slope Stability Analysis And Design In Elbistan-collolar Open Cast Mine." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609939/index.pdf.
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Slope stability is an important aspect of geotechnical engineering. Input
parameters for the analysis are the governing factors and they must be determined
accurately and precisely. Field investigations, laboratory testing and back analyses
are vital instruments for the input parameters.
This study presents the results of slope stability analysis for the soil slopes at
Elbistan-Çö
llolar lignite mine. After executing the drilling programme, samples taken from the drilling work, delivered to soil mechanics laboratory for testing. The basic input parameters, namely cohesion and friction angle determined at soil mechanics laboratory were compared to the parameters obtained from back analysis of a large scale slope failure. Input parameters for the analysis are determined by this way. After determining the input parameters, slope stability analyses were carried out both for the permanent and temporary slopes in AfSin-Elbistan lignite basin, Ç
ö
llolar sector. The effect of ground water on the stability of slopes was investigated in detail and maximum safe slope angles were determined for different water levels. For limit equilibrium analysis, Rocscience SLIDE software, for finite difference analysis in 3-D, Itasca FLAC3D was used. In the limit equilibrium analyses both circular and composite failures were considered. Shear strength reduction method is used for the finite difference method. The results between limit equilibrium and 3-D finite difference methods were compared. When the failure surfaces obtained from the finite difference analyses were imposed to limit equilibrium analysis, computations are resulted in lower factor of safety values for limit equilibrium analysis.
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McGillivray, Catherine Black. "Lubrication mechanisms and their influence on interface strength during installation of subsurface pipes." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31851.
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Thesis (Ph.D)--Geosystems, Georgia Institute of Technology, 2010.Committee Chair: Frost, J. David; Committee Member: Burns, Susan E.; Committee Member: Gokhale, Arun; Committee Member: Mayne, Paul W.; Committee Member: Rix, Glenn J. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Karoumi, Maria. "Hållbart byggande i urbaniseringens tecken – En studie av det framtida underjordiska byggandet i Sverige." Thesis, KTH, Fastigheter och byggande, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170741.
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Giaccobi, Stéphane. "Méthode de conception de multimatériaux à architecture multicouche : application à la conception d’une canalisation sous-marine." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13829/document.
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Les méthodes de sélection de matériaux monolithiques peuvent conduire à des impasses lorsque les exigences fonctionnelles sont très élevées ou contradictoires. Le passage aux multimatériaux peut alors être envisagé. L’objectif de la thèse est de proposer une méthode de conception de multimatériaux à architecture fixée, avec en perspective une application à la conception de conduites offshore pour le génie pétrolier. Seuls les multimatériaux à architecture multicouche sont considérés et la méthode de conception est redéfinie comme une méthode de sélection des constituants du multimatériau et de dimensionnement. Une adaptation des étapes classiques de sélection des matériaux conduit à présenter la méthode en détail sur des exemples simples. Les techniques de programmation par satisfaction de contraintes s’avèrent nécessaires pour la résolution de cas réels de conception multimatériaux. L’application à la conception de conduites offshore permet de valider la méthode et de démontrer sa pertinenceWhen the design requirements are either too stringent or are conflicting, no monolithic material solution exists. In such cases the selection of a multimaterial could be considered. The primary aim of this thesis is to provide a methodology for designing multi-materials with a prescribed arrangement of the constituent materials. The second objective is to apply this new methodology to the design of a submarine pipeline. From amongst the huge variety of multi-material arrangements available, this study focusses on multilayered stackings and therefore the design methodology becomes a method for selecting the materials of the stack and sizing the layers. This original approach is presented in detail using basic examples in order to match the steps of classical methods for selecting engineering materials. The constraints programming techniques were very useful for solving real multimaterial design problems. Applying this new method to the design of a submarine pipeline permits its validation and provides proof of its relevance
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Tanriseven, Esra Nur. "Stability Investigation Of Eti Copper Mine Tailings Dam Using Finite Element Analysis." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614675/index.pdf.
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In mining industry, waste storage is a very prominent issuein this respect, safety of storage structures is one of the leading problems in the industry. Most of the tailings dams require remedial measures, throughout their lifespan to increase their reliability. The objective of the study is to investigate stability problems of formerly constructed but newly raised Eti Copper Mine tailings dam and alternative dam geometries for future raises. Plenty of methods were developed to analyze the reliability of structures
limit equilibrium methods, finite element methods and finite difference methods are among them. In this case, stability of the dam was analyzed with finite element method under static loading conditions. In order to determine input parameters properly, disturbed samples obtained at the field investigations were used. For this purpose, several laboratory experiments were conducted to determine natural moisture content, grain size distribution, specific gravity, Atterberg limits, maximum dry density and shear strength parameters of tailings and embankment material.
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Idris, Jamal. "Accidents géotechniques des tunnels et des ouvrages souterrains - Méthodes analytiques pour le retour d'expérience et la modélisation numérique." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL070N/document.
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L'instabilité des ouvrages souterrains est une cause importante d'accidents tant pendant leur réalisation que pendant leur exploitation. La rétro-analyse d'accidents passés est l'une des méthodes permettant d'améliorer la prévention de tels accidents ainsi que la conception et le dimensionnement des nouveaux projets. Une recherche bibliographique a permis d'établir une base de données de cas d'accidents rencontrés dans les ouvrages souterrains à travers le monde. Ces cas, actuellement au nombre de 230, concernent les phases de construction et d'exploitation d’ouvrages, chaque cas étant caractérisé par plusieurs variables associées aux phénomènes d'instabilité et aux caractéristiques géométriques et géomécaniques de l’ouvrage. Les causes et les conséquences d’instabilités ont été également analysées dont celles liées au contexte géologique et en particulier aux caractéristiques géotechniques des terrains traversés. Cette base de données a permis d’effectuer plusieurs analyses sur les instabilités des ouvrages dont la plus importante est une analyse factorielle de correspondances qui a éclairé les liaisons entres les phénomènes d’instabilités et les différentes modalités de ses variables explicatives. Cette étude propose deux modèles numériques représentatifs des tunnels maçonnés, appuyant sur la modélisation numérique et la technique des plans d’expériences elle porte également sur l’analyse du comportement mécanique de la structure du soutènement en maçonnerie et son évolution en fonction de temps où l’influence des certains paramètres mécaniques du soutènement en maçonnerie a été quantifiée et évaluée par différentes méthodes d’analyses dont l’analyse de la variance et la modélisation par régression multipleThe instability of the underground works is an important cause of many accidents during their construction and exploitation. Experience feedback of previous accidents is one of used methods that allows improving the prevention of such accidents during the design and the construction of new underground works projects. A bibliographical search enabled us to establish a database of tunnels and underground constructions accidents in the world. These database contains currently 230 case related to the two phases of construction and exploitation of underground constructions, each case was characterized by several variables associated to instability phenomena, to geometrical and géomechanicals characteristics of the concerned underground construction. The causes and the consequences of instabilities phenomena were also analysed especially those related to the particular geological context and the géotechnical characteristics of the surrounding ground. The established database enabled us to carry out several analyses on instabilities phenomena like as a factorial correspondence analysis, which aims to discover the relations between instabilities phenomena and their explanatory variables. This study proposes two representative numerical models of vaulted tunnels supported by masonry structure. Biased on the numerical simulation and the experimental design technique, it also relates to the analysis of the mechanical behaviour of the masonry structure support and its evolution in the time, where the influence of certain mechanical parameters of masonry structure was quantified and evaluated by various analyses methods such as multivariate variance analysis and the linear modelling by multiple regression
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Pivatto, Amanda Brandenburg. "Análise experimental e computacional de vigas biapoiadas de concreto armado reforçadas com CRFC." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2660.
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CAPESA falta de manutenção, a mudança de carregamentos, as deficiências de projeto, de execução e até mesmo dos materiais constituintes de uma peça estrutural podem levar à necessidade de aplicação de um reforço estrutural. Dentre estes métodos se destaca o reforço estrutural com Compósitos Reforçados com Fibra de Carbono (CRFC). Este trabalho tem como objetivo analisar o comportamento estrutural por meio de métodos experimentais e modelagem numérica de vigas biapoiadas de concreto armado reforçadas à flexão com CRFC, além de analisar a influência da adição de incrementos de ancoragem no comportamento da peça. O modelo computacional foi desenvolvido no software comercial ANSYS, por meio da utilização do Método dos Elementos Finitos. Foi avaliado o ganho de resistência com a implantação de uma e duas camadas de CRFC em comparação à viga sem reforço. A interface concreto – reforço foi considerada na simulação computacional, uma vez que os esforços atuantes nesta região geralmente são a causa da ruptura neste tipo de peça. Para isso, foi utilizado o Modelo da Zona de Coesão como método de representação da interface. Em relação ao programa experimental, além da variação do número de camadas de reforço, também foi avaliada a influência da adição de incrementos de ancoragem lateral no comportamento das vigas estudadas. Como resultados, foi alcançada uma boa acurácia entre os modelos computacionais e a análise experimental em relação ao valor da carga última de cada situação analisada, bem como em relação ao valor de deslocamento encontrado para as vigas reforçadas. Entretanto, percebeu-se que os valores das deformações obtidos no modelo computacional foram superiores à média dos valores encontrados na análise experimental. Além disso, observou-se também que as vigas tiveram sua rigidez aumentada com o acréscimo de camadas de reforço. Ademais, foi verificado que a adição de incrementos de ancoragem levou a um acréscimo na resistência das peças, mais efetivo que o aumento do número de camadas, para o caso deste trabalho.
The lack of maintenance, the change in loadings, project and execution failures, and even failures of constituent materials of a structural part lead to the necessity of applying a structural reinforcement. Among these methods highlights the structural reinforcement with Carbon Fiber Reinforced Polymer (CFRP). This research has the objective to examine whether there is a good relationship between laboratory tests and a simulation model of reinforced concrete beams strengthened in bending with CFRP, in addition to analyze the influence of anchorage increments application in the structural behavior. The computacional model was developed in the comercial software ANSYS, by the utilization of the Finite Element Modeling for the structural analysis. The resistance gain with the implementation of one and two layers of CFRP was evaluated compared with the reference beam. The concrete – reinforce interface was considered in the computacional simulation, since the active efforts in this area are the reason of this type of structure failure. Thus, the Cohesive Zone Model was used for the interface representation. In relation to the experimental tests, beyond the number of layers variation, it was also evaluated the influence of anchorage increments application in the structural behavior. As results, it was obtained a good accuracy of the computacional models and the experimental tests in relation to the rupture load, in addition to the displacements values for the reinforced beams. However, the strain values achieved by the computacional model were higher than the experimental analysis rate values. Besides, it was also noticed that the beams had an increase of the stiffness with the addition of the reinforced layers. Furthermore, it was verified that the anchorage increments application caused an increase of the resistance, even more efficient than the addition of layers, for this case of study.
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Huang, Jhih-Ping, and 黃祉萍. "Quasi-static Cutting Mechanics of Underground Mechanical Excavation and its Suitable Indices: Application to Design and Construction of Straight / Curved Tunnel and Pipeline System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4jy3zd.
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碩士國立臺灣科技大學
營建工程系
104
To improve mass transit construction and the penetration of sewage reticulation, Taiwan's underground excavation works play a critical role. Mechanical excavation projects are increasing with more infrastructure development. However, most of researches emphasis on geotechnical safety or stability without the assessment of efficiency and suitability of the excavation methods. Some of the mechanical excavation systems used are based on studies done in Europe, Japan and elsewhere by foreign manufacturers hence cannot be relied on to give the standards for design and construction in Taiwan as Japan and European experiences are not necessarily appropriate to conditions in Taiwan. Thus to promote the relevant tunneling technology in Taiwan, there is need for more understandings on this topic. This study plan aims at the tunneling excavation with different dig scales. The proposal seeks to establish a novel, general model that considers the vary machines (tunnel boring machine, shield tunnel and pipe jacking ), types (earth pressure balance, slurry pressure balance, thick-mud) and geological cases (soil, gravel and rock) in one unified model to analyze. The straight/curved thrust and torque will be calculated for a blunt/sharp, wedge/cone cutter from global cutting to local dragging/indentation of a tunneling machine respectively. This study aims at investigation and application for both design and construction such as turnkey project. For “design period”: Besides the traditional equations, the study examined more key factors: single cutter to doubled-cutters, the axial gradient of tunnel, floating power and different working condition (active or passive earth pressure, machine or pipe touch tight or densification by geological gable). For “construction period”: By using dimensional analysis, the proposed model generalizes geological characteristics corresponding to two types of cutting forces (thrust and torque) to evaluate their excavation progress with penetration rate. Furthermore, the normalizedSuitable Indices: can be used not only to estimate the functionality and efficiency of cutting machine adopted for tunnel project, but also to offer a warning information for inadequate cutting strategy. To obtain feasibility of normalizedSuitable Indices: applied to geological prediction by using data mining. This research obtained the following results with two study cases in Taipei: Design parts: (1) Low plasticity clay from first case studies, thrust has been approaching the lower bound at 0k + 398 m, namely in near field generating active earth pressure failure; and settlement may be happened in the far field. (2) Sandstone and shale interbed from first case studies, thrust maximum occurs at 1k + 342 m, the outer cutters due to wear, excavation the aperture and shield machine shell the outer diameter are almost the same, resulting in shield machine were shackled in the underground. Construction parts: Combined previous literatures and this research, as long as the approximate geological materials will cluster is closer either: ductile (soil) thrust index between 10^1 to 10^2, brittle materials (rock-like) between 10^0 and 10^-2, composite material (gravel) between 10^-3 and 10^-1. Data mining: WEKA analysis showed that the difference rings parameters between previous and now value can be predicted geology about the front of 2 times shield machine diameter, two case studies above 80% high accuracy.
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Yu, Wan Tzu, and 尤琬姿. "Quantify Analysis of Social Costs for Underground Pipelines Construction." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/51464986240304873987.
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碩士逢甲大學
土木及水利工程研究所
87
The population and economy keep growing recently. The requirements of public utilities are getting more and more. Especially expanding the underground space is imperative. But we do not plan for long term and so the road surfaces are always being excavated. This bring out the traffic delay, business loss, and inconvenient for daily life etc.. Above-mentioned events lead us to make the social costs into a discussion list. By realizing the analysis of each cost like direct costs and social costs of open-cut and trenchless technologies, we can compare with the economics of both methods. This research aims for the Sewerage Construction in Ling-Sen North Road in Taipei City to quantify the invisible loss. So that we can understand the degree of social loss. In brief, the social costs of trenchless technology are less than that one of open-cut technology. Thus we can say the trenchless technology is better than open-cut one in urban district.
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Wang, Shin-Kai, and 王信凱. "Seismic-Resistant Analyses and Design of Underground Pipelines." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/91789063335654326597.
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碩士國立臺灣科技大學
營建工程系
93
The main objective of this thesis is to perform a collective study for currently available seismic analytical methods and design guidelines for underground water pipes. Some basic mechanical properties of mostly used joint types are also presented. An analysis of a ductile iron pipe joint system based on Northridge and Chi-Chi earthquake data is performed. The analytical result shows that failure modes for ductile iron pipes are dominated by the connection failures caused by a lack of pull-out and compressive resistance in the axially direction.
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Abdel-Magid, Beckry M. "Analyses and design of underground reinforced plastic mortar pipelines." 1986. http://catalog.hathitrust.org/api/volumes/oclc/15650456.html.
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Hsu, Ching-Yao, and 許慶耀. "Design and Analysis of Manhole Cap Lifter for Underground Pipelines." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/33649141067040101895.
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碩士大葉大學
機械工程研究所碩士班
92
This Technical report describes a new design of manhole and hand-hole cap lifter structure. The structure of the cap lifter comprises of a base structure, a scissors linkage, and a hydraulic jack. Both the scissors linkage and hydraulic jack are installed on the base structure. By pumping the hydraulic jack the wires which bolted on scissors linkage can raise the mid span of the cross bars of the cap hooker at the bottom ends of the wires. Also, the base structure is adjustable in length. Therefore, it may fit the cap with different dimensions. With the hydraulic jack and the scissors linkage the lifter can fit and operate in most situations easily and efficiently. The operator can manipulate the lifter by the side of the lifter that is a safer position during lifting. Therefore, the possibility of accident can be reduced to a minimum. In this study, a stress and deformation analysis is performed on the lifter using computer-aided analysis software — ANSYS. The result verifies the strength of the design structure and its associated efficiency.
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Hay, Shanley. "A comparative study of trenchless technologies versus traditional open trenching for the replacement of ageing potable water pipelines." Thesis, 2014. http://hdl.handle.net/10321/1064.
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Submitted in fulfillment of the requirements of the Degree of Magister Technologiae: Civil Engineering, Durban University of Technology, 2013.The urgent need to rehabilitate or replace ageing deteriorated buried potable water pipeline networks is one of the many critical service utility provision challenges faced within the municipalities in South Africa. The majority of these unreliable deteriorated pipeline networks consist of un-dipped (not coated with bitumen) AC piping which have long passed their planned economic and technical lifespan. Traditionally, the open trenching method has been utilised for the replacement of aged and deteriorated piping. However, this traditional open trenching method has shown to be expensive and difficult to implement, particularly in congested high traffic use urban areas. The need to rehabilitate or replace the ageing deteriorated buried potable water pipelines in South Africa, taking into account the above mentioned expensive factors has a solution. This solution is termed ‘trenchless technology’ and sometimes also termed ‘no dig’. Recent advancements in trenchless technologies now include innovative methods such as pipe bursting, close-fit lining and sliplining. Close-fit compact pipe manufactured by Wavin Overseas B.V. was newly introduced in South Africa in 2010 for the rehabilitation of deteriorated pipelines. These trenchless methods require further research into their technical application merits, drawbacks and costs in relation to the traditional open trenching method in order to determine which method is more expensive and also least suitable. Traditionally, the ‘total cost’ associated with pipe rehabilitation or replacement projects consisted only of the direct costs. The indirect and socio-economic inconvenience costs were often ignored and resulted in costly expenses to the municipalities. However, this research will show that these indirect and socio-economic inconvenience costs must form part of the total cost of a project as it assists with the successful completion of the project without expensive unforeseen costs to the municipalities. In addition, this research will provide insight as to which indirect and socio-economic inconveniences are dominantly experienced by the public. To achieve this, a quantitative socio-economic survey questionnaire was developed. This questionnaire was aimed at residents and business owners who were affected during a project of this nature. This research study will serve as a support tool to municipalities of South Africa when selecting a pipe rehabilitation or replacement method. This support tool will provide key technical merits and drawbacks of the traditional open trenching method, pipe bursting method, close-fit compact pipe method and sliplining method. In addition, this research study will compare the ‘total cost’ of the traditional open trenching method against the trenchless pipe bursting method. The decision making process lies in the hands of the municipal technical managers. Therefore, their knowledge and experience of up to date information on trenchless methods (as well as the traditional open trenching method) is vitally important. This research provides insight as to the knowledge and experience of technical municipal staff on trenchless methods, its application and use in South Africa. A quantitative survey questionnaire was developed by the researcher. This questionnaire was aimed at technical staff in the water departments of district and local municipalities of South Africa. The results of the above questionnaire surveys formed part of the eThekwini Water and Sanitation (EWS) Feasibility study funded by the Dutch Government. When comparing the costs of the trenchless pipe bursting method against the traditional open trenching method, the results revealed that trenchless methods are undoubtedly cheaper and far less disruptive to the public. The results of the socio-economic survey revealed that trenchless methods were preferred by the public since it was less disturbing and the hindrances experienced were also far less than the traditional open trenching method. The results of the technical municipal survey questionnaire revealed that at least 50% of municipal technical staff of South Africa are not adequately informed about trenchless methods, its application and technical merits and drawbacks respectively. This survey questionnaire revealed that South Africa may be advancing over the years on the use of trenchless methods, however, more educating in the form of training, seminars and other methods of marketing must be undertaken starting at a municipal level.
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Wang, You-Hao, and 王佑豪. "A Study for Seismic Design Guidelines of Underground Pipelines and Numerical Analysis Methods." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/ypz646.
Full textAbstract:
碩士國立臺北科技大學
土木與防災研究所
99
This research studies the numerical simulation methods of the buried pipeline through the fault, and studies American Lifelines Alliance, Japan and China''s pipeline design methods. It can be divided into two parts. First part is to study the national standard for assessment of underground pipeline projects such as ground shaking, fault, liquefaction, etc. The second part is to study the numerical simulation method of the buried pipeline through the fault. The numerical analysis software ABAQUS is adopted to simulate deformation of the buried pipeline through the fault. The numerical results and the results of the design methods are compared. By the first part of this study to understand, the vibration of the buried pipeline and the soil under seismic load is studied such as deformation and strain of the section of the pipe. In addition, the strain of the temperature and pressure of the pipe, surface live load and static vertical load of buried pipelines be considered. Their strength can not exceed the strength of the pipeline. In future, if these design methods is wish to use ones in Taiwan. They need to modify these design methods. The second part can understand the large deformation analysis method of the buried pipeline through the fault. In addition, considering the different parameters (the angle faults and buried, buried depth, soil types, etc.) in this study is studied.
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Xu, Shi-Jian, and 許時堅. "The Social Costs on the Role of Cost/Benefit Influence Apply to The Underground Pipelines Construction." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/46227947803646248359.
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Huo, Hongbin. "Seismic design and analysis of rectangular underground structures /." 2005. http://proquest.umi.com/pqdweb?did=1003855331&sid=13&Fmt=2&clientId=1566&RQT=309&VName=PQD.
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Lee, Liang-hai 1973. "On the design of slip-on buckle arrestors for offshore pipelines." Thesis, 2007. http://hdl.handle.net/2152/3734.
Full textAbstract:
Offshore pipelines are susceptible to the damage that leads to local collapse. If the ambient pressure is sufficiently high, local collapse can initiate a buckle that propagates at high velocity catastrophically destroying the pipeline. Buckle arrestors are circumferential local stiffeners that are placed periodically along the length of the pipeline. When properly designed, they arrest an incoming buckle thus limiting the damage to the structure to the distance between two adjacent arrestors. Slip-on type buckle arrestors are tight-fitting rings placed over the pipe. They are relatively easy to install and do not require welding. As a result they have been widely used in shallow waters. It has been known that such devices often cannot reach higher levels of arresting efficiency. The somewhat deficient performance is due to the fact that a buckle can penetrate such devices via a folded-up U-mode at pressures that are lower than the collapse pressure of the intact pipe. Because of this they have not seen extensive use in deeper waters. The aim of this study is to quantify the limits in arresting performance of slip-on buckle arrestors in order to enable expanded use in pipelines installed in moderately deep and deep waters. The performance of slip-on buckle arrestors is studied through a combination of experiments and analysis. The study concentrates on pipes with lower D/t values (18-35) suitable for moderately deep and deep waters. The arresting efficiency is studied parametrically through experiments and full scale numerical simulations. The results are used to generate an empirical design formula for the efficiency as a function of the pipe and arrestor geometric and mechanical properties. The performance of slip-on arrestors is shown to be bounded by the socalled the confined propagation pressure. That is the lowest pressure that U-mode pipe collapse propagates inside a rigid circular cavity. Therefore, a quantitative study of this critical pressure is undertaken using experiments and numerical simulations. A new expression relating this critical pressure to the material and geometric parameters of the liner pipe is developed. This in turn is used to develop quantitative limits for the efficiency of slip-on buckle arrestors.
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Cantin, G. M. Delphine. "An investigation of the formation of hollow bead defects in pipeline field welds / G.M. Delphine Cantin." Thesis, 1997. http://hdl.handle.net/2440/19115.
Full textAbstract:
Bibliography: leaves 361-370.xvii, 451 leaves : ill. (some col.) ; 30 cm.
Determines the effects of welding and metallurgical variables on the formation of hollow bead and provides a detailed study of the characteristics of hollow bead in order to understand their formation.
Thesis (Ph.D.)--University of Adelaide, Dept. of Mechanical Engineering, 1998
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Meskele, Tadesse. "Engineering design and analysis of pipe ramming installations." Thesis, 2013. http://hdl.handle.net/1957/37555.
Full textAbstract:
The trenchless technology known as pipe ramming for construction of culverts and buried pipes under roadways or other infrastructure has gained significant popularity due to its cost-effectiveness and ability to alleviate surface disruptions associated with open-cut trenching. Although the experience with pipe ramming is increasing, there has been remarkably little technical guidance available for engineers to appropriately specify aspects of a pipeline or culvert installation, including the planning of feasible layouts, rates of penetration, pipe diameters, and hammers. This research provides a comprehensive engineering framework for evaluation of culvert installations at the planning phase to address the gaps in knowledge associated with pipe ramming.
Presently there are no existing and proven techniques for prediction of settlement, vibration, driving stresses, soil resistance to ramming, and drivability for pipe ramming installations. This study has adopted existing drivability, soil resistance, settlement, and vibration prediction models from pipe jacking, microtunneling, and pile driving models and examined their applicability in pipe ramming installations, resulting in new and technology-specific design guidance. The development of this comprehensive engineering guidance is based on engineering calculations empirically tuned using a database of actual performance measurements. Field observations of five production installations and a full-scale experiment were conducted to form the performance database employed to understand the mechanics associated with pipe ramming installations, ranging from vertical ground movements, ground vibrations, and installation performance.
Settlement prediction was evaluated using the inverted normal probability distribution based models, and these methods over-estimated the observed settlements close to the center of the pipes and under-estimated settlements at radial distances away from the pipe. A pipe-ramming-specific hyperbolic model was developed for better prediction of the vertical settlement induced by pipe ramming in granular soils. Attenuation of observed pipe ramming-induced vibrations was modeled using a simple semi-empirical approach, and the calibrated model resulted in reasonable predictions of the ground vibrations for granular soils. The static soil resistance to ramming was evaluated using the traditional quasi-static pipe jacking models and the models resulted in inaccurate predictions for instrumented pipe ramming installations. Therefore pipe ramming-specific static soil resistance models were developed for both the face and casing resistance in granular soils. Principles of stress wave theory routinely applied in the drivability analyses for pile foundations were adopted for the evaluation of the dynamic response pipes during ramming. Reliable estimates of the static soil resistance and dynamic soil parameters were obtained through signal matching processes. Data-informed drivability analysis were performed to simulate the magnitude of driving stresses and develop drivability curves which relate the penetration resistance of a given pipe and hammer to the range of static soil resistances. The study culminates in the first comprehensive framework and recommendations for the installation of pipes by ramming, and should help owners, consultants, and contractors to appropriately plan pipe ramming installations.Graduation date: 2013
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Mokgohloa, Matthews Chuene. "Prediction of the initiation and orientation of the extension fractures ahead of and around faces and walls of mechanically driven excavations and their effect of stability." Thesis, 2017. https://hdl.handle.net/10539/24196.
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Thesis is submitted in partial fulfilment of the requirements for the degree of Master of Science in Engineering to the Faculty of Engineering and the Built Environment, School of Mining Engineering, University of the Witwatersrand, Johannesburg, 2017Boring of shafts and tunnels in hard rock mines is more prevalent in recent years in South Africa. This normally takes place under substantial stress conditions, where fracturing of rock occurs around the boundaries and ahead of advancing faces of excavations. Fracturing can have a significant impact on boring activities, in some instances causing sidewall spalling which can be extensive, with machine grippers unable to reach the sidewalls. In brittle rock, these fractures are commonly extensional in nature. This research has been undertaken to predict the initiation of extension fractures and their orientations ahead of machine driven tunnels. Furthermore, it will help to assess the stability of the excavations, by evaluating the potential for slab/plate failures. This was based on the typical in situ stress fields for underground deep level mines. The numerical analyses involved the generation of different plots: Principal stress contour plots, depicting stress distributions around and ahead of tunnel excavation, using cutting planes; Isosurfaces, showing zones of extension or potential extents of fracturing, applying the extension strain criterion; and Trajectory ribbons, to demonstrate the orientations of fractures. Based on the results of the stress analyses, potential slab or plate formation was determined. It was noted that the fracture zone is a function of a tunnel size. For instance, a four-metre diameter tunnel is less likely to give boring problems than an eight-metre diameter tunnel. The failure of the tunnels was predicted by employing slab analysis methods. An eight-metre diameter tunnel had slenderness ratio as low as 22.3 as compared with a four-metre diameter tunnel with a slenderness ratio of 27. Looking at buckling stress versus slenderness ratio, this translates to buckling stress values of above 100 MPa for an eight-metre tunnel and to values just below 50 MPa for a four-metre tunnel. The outcome of the research gives a clear indication that boring activities could be undertaken under severe conditions. This could be detrimental to the cutter head, since large slabs and blocks could be encountered during boring. The results of this research can be beneficial in the evaluation of boring conditions prior to and during boring activities.
MT2018
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Huang, Yu-Chi, and 黃渝棋. "Examinations on the Design and Construction of Submarine Water Pipeline:An example of the repair and reinforcement of pipelines in Kinmen and Leiyu." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/99158912087989209886.
Full textAbstract:
碩士國立中興大學
土木工程學系所
97
The purpose of submarine water pipeline project is to build the pipeline underneath the seabed, for water running directly in between lands. Most submarine water pipeline project is built originally for the transportation of oil and natural gas under the sea. Since 1960s the development of mentioned technique is moderately established with 40 years experience. Although submarine water pipeline is rare case to apply, and this technique has not been standardized in accordance with the design of seabed water pipe domestically, yet the general design and planning is identical with the seabed oil pipe. This thesis is the overview of the related part of seabed water pipe project, and discussion for the failure causes of repair and reinforcement of seabed pipe in Kinmen and Leiyu. Furthermore, to adopt the result of under water technology association R.O.C “Study of the design and construction technology of undersea pipeline 2”，and in comparison of specifications from following organization，Ex:DNV(Det Norske Veritas)、BSI (British Standards Institution) 、API (American Petroleum Institute) and submarine pipeline project harbor association Japan, in addition to analyze the program of repair, the research of this thesis also provide the reference of related project design in the future.
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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.
Full textAbstract:
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.
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Han-LinYang and 楊翰霖. "An Urban Design Study on the Renewal of Chung-Li Station and Its Surrounding Area after the Construction of Underground Railway." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/xx759s.
Full textAbstract:
碩士國立成功大學
建築學系
107
SUMMARY Since the Japanese occupation period, the establishment of the location of Chung-Li Railway Station has greatly affected the development of later settlements, including road orientation, urban texture, etc. The railway station created the prosperity of the surrounding urban areas, but the plane railway also blocked the city areas’ development and communication along the railway, making the core urban areas unable to integrate urban planning. In addition, the plane railway has also brought about some urban problems and public safety issues. In recent years, the Taoyuan Underground Railway policy has offered opportunities such as urban renewal, urban consolidation and traffic improvement, and is the flagship project of Taoyuan urban development. Keywords: Chung-Li, Underground Railway, Urban Planning, Railway Station Design,Traffic Improvement INTRODUCTION This paper provides a three-dimensional urban design scheme based on surveys and research, covering a portion of the land surrounding the Chung-Li Railway Station. Considering theintegrity and future of urban development in the Chung-Li area, the strategies include adjusting the transportation network and open space system around the station area, placing new urban volumes and architectural plans to enhance the business level of the Chung-Liarea and meet the needs of the citizens. The scheme provides architectural plans of coconstruction of the underground railway station and the MRT station, and also provides a design of the station business building. The new building volume configuration considers the urban form and the height of building around the railway station and creates a new urban skyline and self-evidentity, expecting to enhance the public's sense of identity with the city and improve the image of the city in the hearts of the citizens. MATERIALS AND METHODS To evaluate the urban strategies and architectural plans suitable for the surrounding area of the station, this paper started by studying the historical development between Chung-Li City and Chung-Li Railway Station since the Qing Dynasty, also by studying the transportation system of Chung-Li District, the surrounding environment of the station, the current status of building use, and the open space of the urban area. PLANNING AND DESIGN The strategies are as follows: 1.Consolidate the transportation network surrounding the station, remove the outdated planning of the traffic ring, integrate the different road networks of the front and rear stations, so as to improve the connection of plane roads. 2.Integrate the planning and configuration of the moving lines of the Taiwan Railway, MRT, buses, taxis, cars and motorcycles, so as to ease the congestion and chaos in urban roads, also simplify the information of the bus route system, improve the transfer efficiency of various vehicles, and offer convenience to passengers. 3.Place collective business functions as new urban business nucleus and simulate its later development of the station area, the commercial structure is adjusted. Place other urban functions such as hotels, bus transfer station, housing, etc., and the urban functions of the station area are improved. 4. Offer more open space and green space to create great pedestrian zones such as large sidewalks and large plazas, provide humanized space, so as to create urban public life, and enhance environmental quality and vitality. CONCLUSION The railway station is represent of the city image, and it is the center of the collective memory of the citizens. Good landmarks help shape the ideal city image and increase the people's sense of identity with the city. This paper attempts to offer a three-dimensional urban plan that is ideal for the current situation and provides a reference for the authorities concerned to plan this area, hoping that this planning and design will benefit the urban development ofTaoyuan City.