Three-dimensional analysis of tunnel face stability in spatially variable soils

被引：40

作者：

Cheng, Hongzhan ^{[1
,2
,3
]}

Chen, Jian ^{[2
,3
,4
,5
]}

Chen, Renpeng ^{[1
]}

Huang, Juehao ^{[2
,3
]}

Li, Jianhe ^{[2
,6
]}

机构：

[1] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China

[2] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Hubei Key Lab Geoenvironm Engn, Wuhan 430071, Hubei, Peoples R China

[5] Ningbo Univ Technol, State Key Lab Geomech & Geotech Engn, Soft Soil Res Ctr, Ningbo 315211, Zhejiang, Peoples R China

[6] Changjiang Inst Survey Planning Design & Res, Wuhan 430010, Hubei, Peoples R China

来源：

COMPUTERS AND GEOTECHNICS | 2019年 / 111卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Tunnel face stability; Upper bound theorem; Spatial variability; Layered soils; Random field; SHALLOW CIRCULAR TUNNELS; UPPER-BOUND ANALYSIS; RELIABILITY-ANALYSIS; LIMIT ANALYSIS; DRIVEN;

D O I：

10.1016/j.compgeo.2019.03.005

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

An advanced three-dimensional model is proposed to study the limit state of a tunnel face in spatially variable soils based on the upper bound theorem. The matrix decomposition method for generating the random field is further modified, allowing the soil spatial variability to be accurately captured with less computational effort. Verification exercises are carried out to demonstrate the satisfactory behaviour yielded by the proposed model in comparison with the random numerical method when tunnels are constructed in homogeneous and layered heterogeneous soils. Sensitivity studies are further performed via Monte Carlo simulations, illustrating the important effects of the spatial variability of the shear strength.

引用

页码：76 / 88

页数：13

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