Influence of arch foot crack on stability of surrounding rock mass in horseshoe-shaped tunnels

被引：0
|
作者：
Zhou, Lei [1 ]
Zhu, Zhe-Ming [1 ]
Liu, Bang [1 ]
Qiu, Hao [1 ]
Dong, Yu-Qing [1 ]
机构：
[1] MOE Key Laboratory of Deep Underground Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu,610065, China
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2020年 / 42卷 / 01期
关键词：
Geotechnical engineering - Rock mechanics - Crack propagation - Rocks - Stability - Crack tips - Numerical models;
D O I：
10.11779/CJGE202001010
中图分类号：
学科分类号：
摘要：
In order to clearly investigate the effect of a crack at the tunnel arch foot on the stability and failure patterns of horseshoe-shaped tunnels, the cracks are classified into two categories: one is that the cracks are distributed counterclockwise in the areas of A(0°C>A. (2) As the dip angle α ranges from 120°~135°, the stability of the tunnel is the weakest. (3) For a tunnel model sample under biaxial compression loading, the failure modes are mainly the tensile and shear failures at the crack tip and sidewall as well as the tensile failure at vault. (4) The influences of crack on tunnel stability are inversely proportional to the crack length ratio β. © 2020, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
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页码：91 / 99
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