The Stability Of Tunnels In Grouted Fault Zones
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The Stability Of Tunnels In Grouted Fault Zones
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Author : Georgios Anagnostou
language : en
Publisher: vdf Hochschulverlag AG
Release Date : 2003
The Stability Of Tunnels In Grouted Fault Zones written by Georgios Anagnostou and has been published by vdf Hochschulverlag AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Technology & Engineering categories.
The Stability Of Tunnels In Grouted Fault Zones
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Author :
language : en
Publisher:
Release Date : 2003
The Stability Of Tunnels In Grouted Fault Zones written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Static Effects And Aspects Of Feasibility And Design Of Drainages In Tunnelling
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Author : Sara Zingg
language : en
Publisher: vdf Hochschulverlag AG
Release Date : 2017-02-21
Static Effects And Aspects Of Feasibility And Design Of Drainages In Tunnelling written by Sara Zingg and has been published by vdf Hochschulverlag AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-02-21 with Technology & Engineering categories.
This PhD thesis investigates the effectiveness of drainage measures with respect to two particularly important problems associated with tunnelling through water-bearing, weak ground: the stability of the tunnel face and the stability and deformation of grouting bodies. Water is an adverse factor with respect to the stability and deformation of underground structures due to the pore water pressure and the seepage forces associated with seepage flow towards the tunnel. Drainage boreholes reduce the pore water pressure and the seepage forces in the vicinity of the cavity. Furthermore, loss of pore water pressure increases the effective stresses and thus the shearing resistance of the ground („consolidation“), which is favourable in terms the deformation occurring during and after tunnelling. The goal of the PhD thesis is to elaborate a more detailed understanding of the interrelationships between drainage measures and the stability of the tunnel face and grouting bodies. The main objectives of the investigations relating to the tunnel face are: 1. analysis of face stability through limit equilibrium computations taking account of the numerically determined seepage flow conditions prevailing in the ground after the implementation of drainage measures; 2. systematic investigation of tunnel face stability considering several different drainage layouts and working out designnomograms; 3. consideration of a series of aspects limiting pore pressure relief and thus the effectiveness of drainage measures and their impact on face stability. The main objectives of the investigations with regard to grouting bodies are: 1. a study of the stabilizing effect of the virtual case of ideal drainage on tunnel support and plastification in grouted fault zones in plane strain conditions; 2. a comparison with the stabilizing effect of real drainage layouts, i.e. when considering pore pressure relief due to specific drainage borehole arrangements; 3. application of the drainage measure both before and after the injection works. In summary, the contribution of this PhD thesis is the detailed investigation of the static effects of drainage measures during tunnelling in water-bearing ground with respect to the stability of the tunnel face and the grouting body as well as the supply of design aids capable of providing a quick assessment of face stability when considering a number of advance drainage schemes.
On The Variability Of Squeezing Behaviour In Tunnelling
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Author : Florence Mezger
language : en
Publisher: vdf Hochschulverlag AG
Release Date : 2020-07-01
On The Variability Of Squeezing Behaviour In Tunnelling written by Florence Mezger and has been published by vdf Hochschulverlag AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-07-01 with Technology & Engineering categories.
On the variability of squeezing behaviour in tunnelling
Tunnelling Into A Sustainable Future Methods And Technologies
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Author : Fredrik Johansson
language : en
Publisher: CRC Press
Release Date : 2025-05-12
Tunnelling Into A Sustainable Future Methods And Technologies written by Fredrik Johansson and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-05-12 with Technology & Engineering categories.
Tunnelling into a Sustainable Future – Methods and Technologies contains the contributions presented at the ITA-AITES World Tunnel Congress 2025 (Stockholm, Sweden, 9-15 May 2025). The contributions cover a wide range of topics in the fields of tunnelling and underground engineering, including: 1. Innovating tunneling 2. Safety Underground 3. Use of underground space 4. Investigations and ground characterisation 5. Planning and design of underground space 6. Conventional tunnelling 7. Mechanised tunnelling 8. Complex geometries including shafts and ramps 9. Grouting and groundwater control 10. Instrumentation and monitoring 11. Operation, inspection and maintenance 12. Contractual aspects, financing and risk management 13. Impact from climate change Tunnelling into a Sustainable Future – Methods and Technologies will serve as a valuable reference to all concerned with tunnelling and underground engineering, including students, researchers and engineers.
North American Tunneling 2010 Proceedings
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Author : Lawrence R. Eckert
language : en
Publisher: SME
Release Date : 2010
North American Tunneling 2010 Proceedings written by Lawrence R. Eckert and has been published by SME this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Technology & Engineering categories.
"Taken from a collection of papers presented at the prestigious 2010 North American Tunneling Conference"--p. [4] of cover.
Spatial Effects In Tunnelling Through Squeezing Ground
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Author : Linard Cantieni
language : en
Publisher: vdf Hochschulverlag AG
Release Date : 2011
Spatial Effects In Tunnelling Through Squeezing Ground written by Linard Cantieni and has been published by vdf Hochschulverlag AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Technology & Engineering categories.
Rock Mechanics In Civil And Environmental Engineering
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Author : Jian Zhao
language : en
Publisher: CRC Press
Release Date : 2010-05-19
Rock Mechanics In Civil And Environmental Engineering written by Jian Zhao and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-05-19 with Technology & Engineering categories.
During the last two decades rock mechanics in Europe has been undergoing some major transformation. The reduction of mining activities in Europe affects heavily on rock mechanics teaching and research at universities and institutes. At the same time, new emerging activities, notably, underground infrastructure construction, geothermal energy develo
On The Role Of Constitutive Behaviour In The Response Of Squeezing Ground To Tunnelling
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Author : Weijie Dong
language : en
Publisher: vdf Hochschulverlag AG
Release Date : 2017-08-14
On The Role Of Constitutive Behaviour In The Response Of Squeezing Ground To Tunnelling written by Weijie Dong and has been published by vdf Hochschulverlag AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-14 with Technology & Engineering categories.
Squeezing conditions in tunnelling are characterized by the occurrence of large deformations of the opening or high rock pressure that may overstress the lining. Squeezing is associated with poor quality rock. Tunnelling in squeezing ground involves great uncertainties. It is therefore very important to gain a better understanding of the underlying mechanisms. Triaxial testing is the main source of information in order to understand the mechanical features of squeezing ground. Despite the complexity of the squeezing mechanism and the behaviour observed under relatively simple loading conditions, most of previous research work and engineering design practice considers the ground as a linearly elastic, perfectly plastic material obeying the Mohr-Coulomb yield criterion. While the MC model is capable of predicting the final strength and post-failure volumetric behaviour of the squeezing rock, it cannot map some potentially important pre-failure features or the occasionally observed contractant plastic deformation. In addition, the MC model usually leads to an overestimation of the strength under undrained conditions, which is unsafe for tunnel design. The present thesis mainly addresses the influence of constitutive modelling on predictions about the response of squeezing ground to tunnelling in order to provide some general guidelines for basic engineering analysis. This objective is achieved by investigating the behaviour of squeezing rocks theoretically and experimentally, using samples from several tunnel projects, including the Gotthard base tunnel and the planned Gibraltar strait tunnel.
Failure Mechanisms In Unsaturated Silty Sand Slopes Triggered By Rainfall
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Author : Amin Askarinejad
language : en
Publisher: vdf Hochschulverlag AG
Release Date : 2015-11-26
Failure Mechanisms In Unsaturated Silty Sand Slopes Triggered By Rainfall written by Amin Askarinejad and has been published by vdf Hochschulverlag AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-11-26 with Science categories.
Landslides triggered by rainfall cause significant damage to infrastructure annually and affect many lives in several parts of the world, including Switzerland. These landslides are initiated by a decrease in the effective stresses, and hence the shear strength of the soil, as a result of the increase in pore water pressure. The frequency of their occurrence is directly affected by the climatic and hydrological conditions in the region. Therefore, it is expected that the predicted rise in the number of extreme meteorological events, accompanied by the concentration of population and infrastructure in mountainous regions, will result in an increased number of casualties associated with landslides in the future. The main goal of this doctoral project was to study the effects of pore water pressure perturbations on the stability of unsaturated silty sand slopes and to investigate the mechanisms leading to the initiation and propagation of the shear deformations and eventually possible rapid mass movements. The behaviour of the test slope prior to the failure induced by the artificial rainfall event was investigated using analytical and numerical methods. The mechanical features of unsaturated soils and reinforcing effects of the vegetation were implemented in 2D and 3D limit equilibrium analysis. The possible depth of the failure surface was calculated based on these simplified models and was compared with the depth of the real failure surface in the landslide triggering experiment. The soil-bedrock interactions, in terms of the pattern of pore pressure distributions and their influence on stabilising or destabilising the slope, were studied and the results were compared to the field measurements.