Effects of overburden, rock strength and pillar width on the safety of a three-parallel-hole tunnel
Effects of overburden, rock strength and pillar width on the safety of a three-parallel-hole tunnel作者机构:Department of Civil Engineering National Taipei University of Technology Taipei Department of Civil Engineering National Chiao-Tung University Hsinchu
出 版 物:《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报(英文版)A辑(应用物理与工程))
年 卷 期:2009年第10卷第11期
页 面:1581-1588页
核心收录:
学科分类:081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程]
主 题:Three-parallel-hole tunnel Tunnels interaction Rock pillar Numerical analysis Stress strength ratio (SSR)
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.