Segmental lining design

2021 ◽  
pp. 269-322
Author(s):  
Benoît Jones
Keyword(s):  
Segmental Lining

Monitoring concrete segmental lining tunnels with fibre-optic and conventional instrumentation

2015 ◽  
Author(s):  
Saleta Gil Lorenzo ◽  
Mohammed Elshafie ◽  
Kenichi Soga ◽  
Robert Mair ◽  
Peter Wright ◽  
...  
Keyword(s):  
Fibre Optic ◽  
Segmental Lining ◽  
Conventional Instrumentation

Suitability Test for the Segmental Lining for the Elbetunnnel 4th Tube, Hamburg

2020 ◽  
pp. 99-106
Author(s):  
R. Bielecki ◽  
J. Schreyer
Keyword(s):  
Segmental Lining

scholarly journals Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Yong-feng Tang ◽  
Han-cheng Chen ◽  
Zhen-wei Ye ◽  
Ting-jin Liu ◽  
Yu-bing Yang
Keyword(s):  
Regression Equation ◽  
Shield Tunnel ◽  
Outer Diameter ◽  
Test Results ◽  
Bending Rigidity ◽  
Segmental Lining ◽  
Ring Model ◽  
Scale Models ◽  
Elastic Stage

The transverse effective rigidity ratio is a key parameter when the uniform rigidity ring model is adopted to design or numerically analyse segmental lining structures commonly used on a shield-driven tunnel. Traditionally, the transverse effective rigidity ratio η is treated as a constant, which can be evaluated through theoretical analysis and model tests. In this study, scale models were designed and tested to investigate the variation of the transverse effective rigidity ratio in the segmental linings’ flattening deformation process. The test results suggested that in the elastic stage, the transverse effective rigidity ratio fluctuated between 0.667 and 0.734 for the stagger-jointed rings and fluctuated between 0.503 and 0.642 for the straight-jointed rings. When segmental linings were squashed and started to crack at the circumferential joints, the transverse effective rigidity ratio decreases sharply. Then, a regression equation was obtained to fit the variation trend of η with the increase of horizontal convergence to the outer-diameter ratio (ΔD/Dout). Finally, in a case study, the regression equation was adapted to determine the value of η of an operated shield tunnel which was once surcharged accidentally and deformed severely so as to numerically predict the prospective deformation induced by the upcoming adjacent excavation. Numerical results indicated that as the value of η decreases, the horizontal convergences of shield tunnel induced by adjacent excavation increase significantly and even more than doubled in the case study. Comparatively, through taking account of the operating tunnels’ exiting transverse deformation, the predicted deformation tends to be unfavourable.

scholarly journals Studies on the key parameters in segmental lining design

2015 ◽  
Vol 7 (6) ◽  
pp. 674-683 ◽  
Author(s):  
Zhenchang Guan ◽  
Tao Deng ◽  
Gang Wang ◽  
Yujing Jiang
Keyword(s):  
Segmental Lining

Feasibility Study on the Implementation of Energy Recovery Tunnel Segmental Lining in the Lot 3 Tunnel on Railway Line 16 of the Grand Paris Express

2018 ◽  
pp. 203-210
Author(s):  
Fabrice Rognon ◽  
Phidias Marco ◽  
Bastien Chappuis ◽  
Eloïse Moradpour ◽  
Nicole Calame
Keyword(s):  
Feasibility Study ◽  
Energy Recovery ◽  
Segmental Lining ◽  
Railway Line

scholarly journals Fatigue Life Characteristics of Segmental Lining Structure for the Shallow Buried Metro Tunnel under the Dynamic Load of a High-Speed Railway

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Wangping Qian ◽  
Taiyue Qi ◽  
Qing Zhao ◽  
Bingrong Pu ◽  
Jin Zhang ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Fatigue Failure ◽  
Dynamic Load ◽  
High Speed ◽  
Dynamic Loads ◽  
High Speed Railway ◽  
Segmental Lining ◽  
Lining Structure ◽  
Metro Tunnel

Shallow buried shield metro tunnels constructed underneath subgrade project of high-speed railways are becoming increasingly common in China, but the lower metro tunnel bears the fatigue effect of dynamic load induced by the upper high-speed railway, so the long-term durability of segmental lining is a nonnegligible problem. The segmental lining structure of metro tunnel is in a state of static-dynamic loads for a long time, especially when a high-speed railway passes above the metro line, and the long-term durability of segmental lining needs further research. Based on theoretical analysis, the effect of different forms of loads on the fatigue life was analyzed, the change law of the static-dynamic loads on segmental lining was summarized, and the method was put forward to evaluate the fatigue life characteristics of segmental lining. The research results reveal that the additional dynamic load is the fundamental reason for the fatigue failure of the structure, and the existence of static load can cause and accelerate the occurrence of structural fatigue failure simultaneously. The results indicate that the fatigue life decreases gradually with the increase of static-dynamic load. Based on coupling analysis of static-dynamic loads of segmental lining, the fatigue life increases first and then decreases with the increase of buried depth of metro tunnel, and it remains unchanged when the depth exceeds a certain value. According to the actual metro tunnel engineering, by using ABAQUS software, a three-dimensional numerical simulation was carried out to analyze the characteristics of the fatigue life and evolution rules of segmental lining. Based on the modified fatigue life formula and metro service life, the optimization design of the buried depth was carried out to determine the most reasonable range of the buried depth. This study provides a valuable reference for safe operation and long-term durability of metro tunnels under high-speed railways.

A progressive model to simulate the full mechanical behavior of concrete segmental lining longitudinal joints

2015 ◽  
Vol 93 ◽  
pp. 97-113 ◽  
Author(s):  
Xiaojun Li ◽  
Zhiguo Yan ◽  
Zhen Wang ◽  
Hehua Zhu
Keyword(s):  
Mechanical Behavior ◽  
Segmental Lining ◽  
Longitudinal Joints
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