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