Blow-out failure analysis of tunnel face in shallow slurry shield tunneling

被引：1

作者：

Li F. ^{[1
,2
]}

Tang X. ^{[1
]}

Liu W. ^{[1
,3
]}

Zhao Y. ^{[4
]}

Tang Q. ^{[3
]}

机构：

[1] Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou

[2] China Railway Design Corporation, Tianjin

[3] School of Urban Rail Transportation, Soochow University, Suzhou

[4] Institute of Disaster Prevention Engineering, Zhejiang University, Hangzhou

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2017年 / 48卷 / 07期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

Blow-out failure; Shallow tunnel; Support pressure; Upper bound analysis; Working face;

D O I：

10.11817/j.issn.1672-7207.2017.07.018

中图分类号：

学科分类号：

摘要：

Based on Hangzhou canal tunnel project, the explicit differential code FLAC3D was applied to investigate the blow-out failure of tunnel face. The case of Hangzhou canal tunnel was investigated, an agreement between the upper bound solution and numerical solution was discovered. The results show that partial failure existing on the up part of face is found instead of integrate failure. The ratio of failure height to tunnel diameter is majorly affected by the cover depth, but little influenced by frictional angles of soils. Furthermore, on the ground surface, the soil upheaving starts where is above the tunnel face. The ratio of upheaving length to the tunnel diameter is 1.5. This study improves the evaluation of the upper limit support pressure for the blow-out failure and the relevant theoretical foundation is cemented. © 2017, Central South University Press. All right reserved.

引用

页码：1809 / 1816

页数：7

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