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Author: Dan Meng
Publisher: Springer Nature
ISBN: 9811934746
Category : Science
Languages : en
Pages : 315
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Book Description
This book covers tunnel construction and building construction and design. It has two parts. Part one is for the engineering practice of the subway tunnel through the base of the building in typical geological conditions, to study the mechanism and law of building damage caused by stratum deformation by in-situ monitoring, numerical simulation and theoretical analysis methods. At the same time, the risk management of subway tunnel through the bottom of the building is discussed. Second part, in view of the excavation and unloading of the foundation pit and the main structure loading in the process of high-rise building construction, discusses optimization of the construction scheme, systematic evaluation of the safety of the existing tunnel and control measures combined with the engineering practice. This book provides a valuable contribution to the field of tunnel construction and design and construction of building for both the engineering experts and graduate students as well.
Author: Dan Meng
Publisher: Springer Nature
ISBN: 9811934746
Category : Science
Languages : en
Pages : 315
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Book Description
This book covers tunnel construction and building construction and design. It has two parts. Part one is for the engineering practice of the subway tunnel through the base of the building in typical geological conditions, to study the mechanism and law of building damage caused by stratum deformation by in-situ monitoring, numerical simulation and theoretical analysis methods. At the same time, the risk management of subway tunnel through the bottom of the building is discussed. Second part, in view of the excavation and unloading of the foundation pit and the main structure loading in the process of high-rise building construction, discusses optimization of the construction scheme, systematic evaluation of the safety of the existing tunnel and control measures combined with the engineering practice. This book provides a valuable contribution to the field of tunnel construction and design and construction of building for both the engineering experts and graduate students as well.
Author: Pietro Lunardi
Publisher: Springer Science & Business Media
ISBN: 3540738754
Category : Science
Languages : en
Pages : 580
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Book Description
This work illustrates how the Analysis of Controlled Deformation in Rocks and Soils (ADECO-RS) is used in the design and the construction of tunnels. This is a very new and effective way of tunnel construction. The ADECO-RS approach makes a clear distinction between the design and the construction stages and allows reliable forecasts of construction times and costs to be made. It uses the advance core (the core of ground ahead of the face) as a structural tool for the long and short term stabilisation of tunnels, after its rigidity has first been regulated using conservation techniques.
Author: Günther Meschke
Publisher: Springer Nature
ISBN: 3031240669
Category : Science
Languages : en
Pages : 477
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Book Description
This open access book compiles the research results of the Collaborative Research Center SFB 837, which has been running since 2010 and will end in 2022, with the topic "Interaction Modeling in Mechanized Tunneling". The Collaborative Research Center is funded by the German Research Foundation (DFG) and is currently the world's largest research facility in the field of tunneling. The aim of the publication is to make our scientific findings accessible to the international professional community. The individual chapters deal with all subsystems relevant in mechanized tunneling and their interaction. The latest results of digital planning and real-time tunneling support have been included.
Author: Benjamín Celada
Publisher: CRC Press
ISBN: 1351168479
Category : Technology & Engineering
Languages : en
Pages : 454
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Book Description
This practical and design-oriented book focuses on ground characterization and structural calculation, as part of the active structural design methodology. With a focus on rock tunnelling it offers a comprehensive rather than a topic-based perspective, deriving sound tunnel design criteria and methods from basic principles. Ground characterization includes excavations, site investigation, and in situ stress determination, culminating in geotechnical classifications. The book then deals with various construction methods and their appropriate calculations, which range from constitutive models for the stress-strain behaviour of an excavation and tunnel support elements to a full stress–strain analysis methodology. The heavily practical approach of the book draws on the authors’ twenty years of tunnelling experience in Spain and South America. It will help any young or established professional who wants to develop a career in the underground field across both civil engineering and geology. As it incorporates the very fundamentals of tunneling design, it can be used as a support for tunneling courses or as a textbook for master’s and PhD courses. Benjamín Celada was Chief Tunnel Engineer at Hunosa and Potasas de Navarra S.A. before founding Geocontrol S.A. He has also worked for twenty years as Professor of Underground Works at the Polytechnic Mining University in Madrid, Spain. Z. T. Bieniawski directed the Rock Mechanics Department of the Council for Scientific and Industrial Research in Pretoria, then taught at the Pennsylvania State University for twenty years.
Author: Vasiliki Founta
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
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Book Description
Advances in tunneling technology, notably in the widespread use of closed-face tunneling boring machines, have reduced risks and greatly increased the productivity of underground construction projects. For shallow tunnels in 'soft ground', instabilities can create collapse mechanisms that propagate to the ground surface, while the prediction and control of tunnel-induced ground deformations remain a key challenge. These problems are especially significant for 'mixed face' conditions, where the tunnel boring machine encounters soils of contrasting mechanical and/or hydraulic properties. This thesis uses finite element simulations to investigate the control of face stability and ground deformations for shallow tunnels in soft ground. The primary control parameters of interest are the face pressures imposed by earth pressure balance (EPB) or slurry shield machines, and the grouting pressures used to control deformations around the tail void at the rear of the tunnel shield. Stability is evaluated by methods of (c-phi) strength reduction, for a range of ground conditions including i) undrained failure in low permeability clays with continuous and discontinuous (mixed face) strength profiles; and ii) drained shearing in high permeability sands above and below the water table, where the closed-face conditions at the tunnel face provide an impermeable membrane. The numerical results are synthesized into a series of generalized design charts for immediate application. Numerical simulations using 3D finite element models are also used to investigate the factors influencing ground movements for closed-face tunneling operations using a relatively simple elastic-perfectly plastic model of soil behavior. These analyses show that maximum surface deformations above the tunnel can be estimated by simple addition of constituent sources associated with the face pressure, shield shape (conicity), machine weight (buoyancy) and grouting pressure. The research proposes a simplified method for predicting the surface settlements based on analytical parameterization of the numerical results, enabling direct design of parameters for controlling ground deformations associated with tunneling for mixed-face conditions in clays. The proposed methodology for predicting ground settlement has been evaluated using data from three well-documented case studies: 1) Crossrail C300 beneath Hyde Park in London, where tunnels were bored through units of stiff clay; 2) Downtown Line DTL3 (C933) in Singapore where tunnels traversed an interface between stiff Old Alluvium and overlying soft marine clays; and 3) northern sections of the MTRA Blue Line in Bangkok, where tunnels were built below the interface between soft and stiff clays. The comparisons between computed and measured data from these projects show that the proposed generic design method achieves comparable agreement to site specific numerical simulations and empirical methods such as ANN. Further studies are now needed to extend the model for mixed face conditions with contrasting permeability.
Author: Vittorio Guglielmetti
Publisher: CRC Press
ISBN: 0203938518
Category : Technology & Engineering
Languages : en
Pages : 504
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Book Description
Internationally, the mechanized excavation of tunnels has intensified in the last two decades, as the number of tunnels being constructed for subways and railway underpasses increases. The subject of mechanized tunnelling in urban areas has not previously received the attention that it deserves, despite there being specific hazards associated with the construction of tunnels in metropolitan areas, including poor ground conditions, water tables higher than the level of tunnels, and subsidence leading to damage to the existing structures on the surface. The application of technologies for achieving the stability of the tunnel and for minimizing surface settlement is described in this book. Accurate characterization of the ground; rigorous assessment and management of risk from design to maintenance; the correct choice of a tunnel boring machine and a plan for the advancement of the tunnel; specific excavation procedures and real-time monitoring of excavation parameters are all discussed in this thorough work.
Author: Mohammed Elshafie
Publisher: CRC Press
ISBN: 1000421104
Category : Technology & Engineering
Languages : en
Pages : 1846
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Book Description
Geotechnical Aspects of Underground Construction in Soft Ground comprises a collection of 112 papers, four general reports on the symposium themes, the Fujita Lecture, three Special Lectures and the Bright Spark Lecture presented at the Tenth International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, held in Cambridge, United Kingdom, 27-29 June 2022. The symposium is the latest in a series which began in New Delhi in 1994, and was followed by symposia in London (1996), Tokyo (1999), Toulouse (2002), Amsterdam (2005), Shanghai (2008), Rome (2011), Seoul (2014) and Sao Paulo (2017). This was organised by the Geotechnical Research Group at the University of Cambridge, under the auspices of the Technical Committee TC204 of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). Geotechnical Aspects of Underground Construction in Soft Ground includes contributions from more than 25 countries on research, design and construction of underground works in soft ground. The contributions cover: Field case studies Sensing technologies and monitoring for underground construction in soft ground Physical and numerical modelling of tunnels and deep excavations in soft ground Seismic response of underground infrastructure in soft ground Design and application of ground improvement for underground construction Ground movements, interaction with existing structures and mitigation measures The general reports give an overview of the papers submitted to the symposium, covered in four technical sessions. The proceedings include the written version of the five invited lectures covering topics ranging from developments in geotechnical aspects of underground construction, tunnelling and groundwater interaction (short and long-term effects), the influence of earth pressure balance shield tunnelling on pre-convergence and segmental liner loading (field observations, modelling and implications on design). Similar to previous editions, Geotechnical Aspects of Underground Construction in Soft Ground represents a valuable source of reference on the current practice of analysis, design, and construction of tunnels and deep excavations in soft ground. The book is particularly aimed at academics and professionals interested in geotechnical and underground engineering.
Author: Klaas Jan Bakker
Publisher: CRC Press
ISBN: 0415889669
Category : Technology & Engineering
Languages : en
Pages : 971
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Book Description
A valuable source of reference on the current practices of analysis, design and construction of tunnels and underground structures in soft ground. This collection of reviewed papers covers a wide range of tunnelling practice, from deep excavations in Singapore to the construction of a new metro line in Barcelona. The international scope of the cont
Author: Evangelia S. Ieronymaki
Publisher:
ISBN:
Category :
Languages : en
Pages : 354
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Book Description
Construction of large diameter tunnels is frequently accomplished by closed face tunnel boring machines (TBM) using a combination of face pressure and grouting around the precast lining in order to limit ground movements and potential damage to overlying structures. This thesis analyzes monitoring data from the Crossrail project involving twin tunnels construction using Earth Pressure Balance (EPB) machines in London Clay. The research focuses on the 'greenfield' response during tunnel excavation beneath Hyde Park. Far-field measurements of surface and subsurface ground movements were interpreted using 2D finite element analyses using a range of constitutive models with parameters calibrated to non-linear stress-strain properties measured in high quality laboratory tests on London Clay. The analyses optimize three input parameters corresponding to boundary deformations around the tunnel cavity, using a least squares fit to the measured ground movements. The results for the first tunnel (WB) show that even simple soil models are able to achieve good agreement with far field ground deformations, while more complex models (MIT-Si) can represent accurately movements occurring much closer to the tunnel lining and hence, provide a more reliable guide to deformation sources at the tunnel cavity. The study also shows how ground movements induced by the second (EB) tunnel were influenced by proximity to the completed WB tunnel. The results provide a comprehensive view of the ground movement pattern and a useful framework for understanding how ground response is linked to EPB control parameters that can be investigated using 3D finite element models. Comparisons with data from prior open-face shield construction of the Jubilee Line Extension (in similar ground conditions) show that there are pervasive differences in the magnitudes and cavity deformations modes associated with different methods of tunnel construction. The current analyses of soil-structure interaction consider the measured deformations of a concrete-framed structure, Avenfield House, caused by the twin Crossrail tunnels. The thesis proposes a simple elastic shear beam model of the structure and assumes that the cavity deformation parameters are uncoupled from the presence of the structure. The results demonstrate that deformations of the structure can be predicted using information from the greenfield ground response.
Author: Michael Sakellariou
Publisher: BoD – Books on Demand
ISBN: 1789854652
Category : Technology & Engineering
Languages : en
Pages : 296
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Book Description
This volume presents a selection of chapters covering a wide range of tunneling engineering topics. The scope was to present reviews of established methods and new approaches in construction practice and in digital technology tools like building information modeling. The book is divided in four sections dealing with geological aspects of tunneling, analysis and design, new challenges in tunnel construction, and tunneling in the digital era. Topics from site investigation and rock mass failure mechanisms, analysis and design approaches, and innovations in tunnel construction through digital tools are covered in 10 chapters. The references provided will be useful for further reading.
