高水位敏感地层基坑施工对既有隧道数值影响分析

Numerical Analysis of Influence of Foundation Pit Construction on Existing Tunnel in High Water Level Sensitive Stratum

当前已运营隧道沿线的施工活动愈发频繁,基坑开挖是最为常见的工程之一,但在邻近既有隧道旁开挖基坑会对隧道造成一系列不良影响。以杭州某深基坑施工为例,利用Plaxis 3D有限元软件,模拟高水位敏感地层中的深基坑工程开挖施工对保护区范围内既有隧道的影响,分析在既有隧道旁进行基坑施工的影响。

At present,the construction activities along the operating tunnels are more and more frequent,and the excavation of foundation pit is one of the most common projects.However,the excavation of foundation pit near the existing tunnels will cause a series of adverse effects on the tunnels.Taking a deep foundation pit construction in Hangzhou as an example,Plaxis 3D finite element software is used to simulate the influence of excavation of deep foundation pit project in high water level sensitive stratum on the existing tunnel in the protection area,and the influence of foundation pit construction beside the existing tunnel is analyzed.