Seepage effect on progressive failure of shield tunnel face in granular soils by coupled continuum-discrete method

被引：40
作者：
Tu, Shiqin [1 ,2 ]
Li, Wei [1 ,2 ]
Zhang, Chengping [1 ,2 ]
Wang, Libin [1 ,2 ]
Jin, Zixian [1 ,2 ]
Wang, Saixu [1 ,2 ]
机构：
[1] Beijing Jiaotong Univ, Key Lab Urban Underground Engn, Educ Minist, Beijing 100044, Peoples R China
[2] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2024年 / 166卷
基金：
中国国家自然科学基金;
关键词：
Tunnel face stability; Underwater tunnel; Discrete element method; Fluid-coupled simulation; Darcy's law; SHALLOW CIRCULAR TUNNELS; DARCYS-LAW FORMULATION; UPPER-BOUND ANALYSIS; STABILITY ANALYSIS; PRESSURE; MODEL; DRIVEN; SIMULATION; FLOW;
D O I：
10.1016/j.compgeo.2023.106009
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Seepage induced by the difference of hydraulic head between the ground and the shield's chamber will adversely affect the stability of tunnel face when tunnels are excavated through water-rich stratum. In order to investigate the influence of seepage on the stability of tunnel face, a 3D continuum-discrete method is proposed to simulate the failure of tunnel face. The large deformation behavior of soil is determined by the discrete element method and the fluid flow in soil phase is described by the Darcy fluid model and continuity equation. A series of simulations are carried out to obtain the failure mechanism and critical support pressure of tunnel face. Then the results under dry, undrained and seepage conditions are analyzed and the seepage effect on the stability of tunnel face with different water depth is investigated. Besides, a comparison between the simulation results and so-lutions in previous researches is conducted. Additionally, the micro-mechanical analysis under dry and seepage conditions are presented. The results show that the coupled method can well evaluate the stability of tunnel face considering seepage effect and provider useful guidance for practical tunnel designs.
引用
收藏
页数：19
相关论文
共 67 条
[1]   Face stability conditions with earth-pressure-balanced shields [J].
Anagnostou, G ;
Kovari, K .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 1996, 11 (02) :165-173
[2]   THE FACE STABILITY OF SLURRY-SHIELD-DRIVEN TUNNELS [J].
ANAGNOSTOU, G ;
KOVARI, K .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 1994, 9 (02) :165-174
[3]  
[Anonymous], 2020, ASTM D7181-11
[4]  
Bardenhagen S.G., 2001, An Improved Contact Algorithm for the Material Point Method and Application to Stress Propagation in Granular Material
[5]   Goodbye, Hazen; Hello, Kozeny-Carman [J].
Carrier, WD .
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 2003, 129 (11) :1054-1056
[6]   SHALLOW TUNNELS IN COHESIONLESS SOIL - STABILITY OF TUNNEL FACE [J].
CHAMBON, P ;
CORTE, JF .
JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE, 1994, 120 (07) :1148-1165
[7]   Face stability analysis of shallow shield tunnels in dry sandy ground using the discrete element method [J].
Chen, R. P. ;
Tang, L. J. ;
Ling, D. S. ;
Chen, Y. M. .
COMPUTERS AND GEOTECHNICS, 2011, 38 (02) :187-195
[8]   Centrifugal model tests on face failure of earth pressure balance shield induced by steady state seepage in saturated sandy silt ground [J].
Chen, Renpeng ;
Yin, Xinsheng ;
Tang, Lvjun ;
Chen, Yunmin .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2018, 81 :315-325
[9]   Experimental investigation of face instability for tunnels in sandy cobble strata [J].
Di, Qiguang ;
Li, Pengfei ;
Zhang, Mingju ;
Cui, Xiaopu .
UNDERGROUND SPACE, 2023, 10 :199-216
[10]   Influence of relative density on deformation and failure characteristics induced by tunnel face instability in sandy cobble strata [J].
Di, Qiguang ;
Li, Pengfei ;
Zhang, Mingju ;
Cui, Xiaopu .
ENGINEERING FAILURE ANALYSIS, 2022, 141
1234567