苏亭隧道浅埋段施工与监测分析

Construction and Monitoring Analysis of Shallow Buried Section in Suting Tunnel

为验证苏亭隧道浅埋段和边坡支护结构设计的合理性,在施工过程中布置测点开展监测工作。监测分析结果表明隧道浅埋段施工期间,地表下沉和边坡沉降变形均呈现前期变化速率快,后期逐渐趋于平稳的趋势。明洞回填阶段,地表下沉和边坡沉降变形量均较小,说明隧道围岩、支护结构和边坡均达到了稳定状态,隧道支护结构设计与施工方案可行。

In order to verify the rationality of the design of the shallow buried section and slope support structure of Suting Tunnel,in the construction process,test points were arranged to carry out the monitoring work.From the monitoring analysis,it can be seen that in the construction of the shallow buried section of the tunnel,both surface settlement and slope settlement deformation show a rapid change rate in the early stage,and gradually tend to be stable in the later stage.In the backfilling stage of the open tunnel,the volumes of both surface settlement and slope settlement deformation are small,which shows that the surrounding rock,support structure and slope of the tunnel reach the stable state,and the design and construction schemes of the tunnel support structure are feasible.