穿越既有河流的隧道施工安全分析

Safety analysis of tunnel construction crossing an existing rivery

文章以穿越既有河流的某隧道施工为背景,采用有限元方法建立了隧道施工过程的数值分析模型,分析了加固前后隧道施工过程中围岩变形及初支应力分布。结果表明,隧道围岩加固前,隧道施工过程中围岩位移大,锚杆应力大于规范限值,隧道施工风险高;隧道围岩加固后,隧道施工过程中围岩的变形和初支的应力有了大幅降低,保障了隧道施工的安全。

This paper focuses on the construction of a tunnel that crosses an existing river and utilizes the finite element method to establish a numerical analysis model for the construction process.The study analyzes the deformation of the surrounding rock and the initial support stress distribution during the tunnel construction before and after reinforcement.The results indicate that,before the reinforcement of the tunnel surrounding rock,there is significant displacement during the construction process,and the stress on the anchor rod exceeds the specified limit,posing high construction risks.After the reinforcement of the tunnel surrounding rock,both the deformation of the surrounding rock and the stress on the initial support decrease significantly during the construction process,ensuring the safety of the tunnel construction.