暗挖通道与深基坑交叉施工对地铁影响的研究

Research on influence of cross-construction of underground tunnel and deep foundation pit on subway

依托深圳地铁1号线某车站新建连接通道工程,采用有限元模拟分析方法,分析暗挖通道和深基坑交叉施工对既有地铁隧道的影响,得出以下结论:先施工与地铁隧道相邻的深基坑,再进行暗挖通道的施工顺序对地铁隧道造成的变形较小;既有地铁隧道产生的竖向位移主要由暗挖通道施工控制,水平位移则主要由深基坑施工控制,整体总变形大小主要取决于深基坑施工。

Based on the newly-built connecting tunnel project of a station of Shenzhenne 1,this paper adopts the finite element simulation analysis method to analyze the influence of the cross-construction between the underground excavation tunnel and the deep foundation pit on the existing subway tunnel,and draw the following conclusion:the construction sequence of the deep foundation pit adjacent to the subway tunnel first,and then the underground excavation tunnel secound will cause less deformation to the subway tunnel;the vertical displacement generated by the existing subway tunnel is mainly controlled by the construction of the underground excavation channel,and the horizontal displacement is mainly controlled by the construction of the deep foundation pit.The overall total deformation mainly depends on the construction of the deep foundation pit.