超大断面浅埋软弱围岩市政隧道施工分析

Construction Analysis of Municipal Tunnels with Super Large Cross-section and Shallow Buried Weak Surrounding Rock

随着市政道路工程逐渐完善,隧道断面不断增大,常面临超大断面浅埋软弱围岩的施工工况,对隧道施工提出更高的要求。本文经过对常见施工方法的分析,结合某工程项目对隧道施工方法进行详细阐述,通过建立双侧壁导坑法模型以及交叉中隔壁法模型,对两种工法进行比对,关注围岩位移的监测,控制支护变形以及地面沉降等问题,选择最佳施工工法。

With the gradual improvement of municipal road engineering,the tunnel section continues to increase,often facing construction conditions of super large section shallow buried weak surrounding rock,which puts forward higher requirements for tunnel construction.This article analyzes common construction methods and provides a detailed explanation of tunnel construction methods in conjunction with a certain engineering project.By establishing models of double-sided wall heading method and cross middle partition method,the two methods are compared,focusing on monitoring surrounding rock displacement,controlling support deformation and ground settlement,and selecting the best construction method.