Effects of overburden, rock strength and pillar width on the safety of a three-parallel-hole tunnel

被引：4
|
作者：
Shong-loong CHEN [1 ]
Meen-wah GUI [1 ]
机构：
[1] Department of Civil Engineering, National Taipei University of Technology
来源：
Journal of Zhejiang University(Science A:An International Applied Physics & Engineering Journal) | 2009年 / 10卷 / 11期
关键词：
Three-parallel-hole tunnel; Tunnels interaction; Rock pillar; Numerical analysis; Stress strength ratio (SSR);
D O I：
暂无
中图分类号：
U451.2 [];
学科分类号：
0814 ; 081406 ;
摘要：
During the excavation of three-parallel-hole tunnel, the tunnel might collapse due to over-stress as a result of inadequate rock pillar width. Treating the rock overburden depth, rock strength, and rock pillar width as variables, a series of 3D numerical analysis was carried out to examine the effect of each variable on the safety of the tunnel, in particular the rock pillar. A stress strength ratio (SSR) was used to define whether the safety of the rock pillar was exceeded. A simple design chart for the case of three-parallel-hole tunnel, which took into account the influence of overburden depth, rock pillar width, and rock strength, was also proposed for used in the preliminary design stage.
引用
收藏
页码：1581 / 1588
页数：8
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