隧道初期支护锚杆失效对结构安全影响分析  

Analysis of the impact of failure of anchor rods in the initial support of tunnels on structural safety

作　　者：王朋朋 姚静 WANG Pengpeng;YAO Jing(School of Traffic Engineering,Guizhou Institute of Technology,Guizhou Guiyang 550003 China;Guizhou Province Quality and Safety Traffic Engineering Monitoring And Inspection Center Co.,Ltd.,Guizhou Guiyang 550016 China)

机构地区：[1]贵州理工学院交通工程学院,贵州贵阳550003 [2]贵州省质安交通工程监控检测中心有限责任公司,贵州贵阳550016

出　　处：《山东交通科技》2024年第4期113-117,126,共6页

摘　　要：以实际工程为依托,采用FLAC有限元分析软件针对初期支护锚杆失效对围岩变形、初期支护及二衬受力的影响进行模拟计算,并基于容许应力法分析锚杆失效时隧道的安全性。分析结果表明,隧道锚杆失效对隧道结构安全影响较小。但考虑多种缺陷因素叠加影响及运营期地质环境改变,为确保隧道运营期安全,需对隧道缺陷段开展长效监测。Based on the actual project,FLAC finite element analysis software is used to simulate the influence of the failure of the initial support bolt on the deformation of surrounding rock,the initial support and the force of the secondary lining,and the safety of the tunnel is analyzed based on the allowable stress method.The analysis results show that the failure of anchor rod has little effect on the safety of tunnel structure.However,considering the superimposed effects of multiple defect factors and the change of geological environment during operation,it is necessary to carry out long-term monitoring of tunnel defect section in order to ensure the safety of tunnel operation.

关 键 词：隧道工程 初期支护 结构安全 数值模拟 

分 类 号：U451[建筑科学—桥梁与隧道工程]