大断面铁路隧道现场监测分析

On the site monitoring analysis of the large-section railway tunnel

针对大断面铁路隧道的特点,对达成铁路扩建工程家乡沟隧道进行周边收敛、拱顶下沉等项目的监测工作,基于监测结果,分析该隧道围岩和支护系统的变形特点,指出大断面隧道开挖影响的时空范围,为支护体系的优化提供依据。

Aiming at the characteristics of the large-section railway tunnel, the supervision work is done to finish the peripheral convergence and the vault crown settlement of Jiaxianggou tunnel in the railway extension project. According to the monitoring results, the paper analyzes the deforming characteristics of the tunnel surrounding rocks and the supporting system, points out the space-time unique affected by the largesection tunnel digging, and it provides evidence for the optimization of the supporting system.