A discrete numerical approach for modeling face stability in slurry shield tunnelling in soft soils

被引：121
|
作者：
Zhang, Z. X. [1 ,2 ]
Hu, X. Y. [1 ,2 ]
Scott, Kieffer D. [3 ]
机构：
[1] Tongji Univ, Dept Geotech Engn, Sch Civil Engn, Shanghai 200092, Peoples R China
[2] Tongji Univ, Key Lab Geotech Engn, Shanghai 200092, Peoples R China
[3] Graz Univ Technol, Inst Appl Geosci, A-8010 Graz, Austria
来源：
COMPUTERS AND GEOTECHNICS | 2011年 / 38卷 / 01期
关键词：
Slurry shield tunnelling; Numerical simulation; Face stability; Failure mechanism; SHALLOW TUNNELS;
D O I：
10.1016/j.compgeo.2010.10.011
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
In this paper, a numerical simulation method for evaluating tunnelling-induced ground movement is presented. The method involves discrete element simulation of TBM slurry shield advancement and considers explicitly soil excavation from the face, effects of varying face support pressure, and the influence of tunnel cover depth. For the cases studied, it is found that for tunnel cover depths (C/D) between 0.7 and 2.1, ground deformations inducing by the tunnelling can be controlled within a certain extent and tunnel face stability can ensured, provided the support pressure ratio (N) lies between 0.8 and 1.5. The proposed method is reasonably benefited to modeling the face stability in shield-driven tunnels in soft soils. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：94 / 104
页数：11
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