Face stability analysis of shallow circular tunnels driven by a pressurized shield in purely cohesive soils under undrained conditions

被引：44

作者：

Ding, Wantao ^{[1
,2
]}

Liu, Keqi ^{[2
]}

Shi, Peihe ^{[2
]}

Li, Mingjiang ^{[2
]}

Hou, Minglei ^{[2
]}

机构：

[1] Shandong Univ, Sch Qilu Transportat, Jinan, Shandong, Peoples R China

[2] Shandong Univ, Res Ctr Geotech & Struct Engn, Jinan, Shandong, Peoples R China

来源：

COMPUTERS AND GEOTECHNICS | 2019年 / 107卷

基金：

中国国家自然科学基金;

关键词：

Slip line; Limit analysis; Face stability; Collapse mechanism; Purely cohesive soils; UPPER-BOUND SOLUTIONS;

D O I：

10.1016/j.compgeo.2018.11.025

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Based on the slip line and limit analysis theories, this paper presents a new 3D collapse mechanism to analyze the face stability of a circular shield-driven tunnel in purely cohesive soil. The new collapse mechanism is a 4 variable multizone mechanism that depends on cover-to-diameter ratios (C/D). The proposed mechanism suggests that failure zones at the tunnel face are primarily formed by shear failure. A comparison of this approach with numerical methods and other kinematic approaches shows that the proposed failure mechanism significantly improves the existing upper-bound solutions for the face stability of circular tunnels in purely cohesive

引用

页码：110 / 127

页数：18

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