高密度街区同步开发群坑监测分析

Monitoring analysis of synchronized excavation of group related foundation pits in dense street blocks

以上海世博央企总部基地高密度街区群坑工程为背景,结合其中3个同期施工基坑的监测数据,分析了群坑同期施工过程中的围护墙变形、围护墙顶部位移、支撑轴力和立柱竖向位移的变化规律,分析结果表明:与基坑普通位置相比,群坑相邻侧的围护墙变形减小,围护墙顶部位移减小,立柱隆起增大,相邻基坑的开挖深度越大,该方向的支撑轴力越小。

Based on the project of Shanghai expo central enterprises headquarters base,monitoring data of three synchronized excavated foundation pits is analyzed. The monitoring items include lateral deformation of the underground diaphragm wall,displacement at the top of the underground diaphragm wall,axial forces of the supports and vertical displacement of pillars. The results indicate that, compared with normal area of the foundation pit, the lateral deformation of the underground diaphragm wall in the adjacent area decreases; displacement at the top of underground diaphragm wall reduces; vertical displacement of pillars increases; the axial force of the supports tends to decrease when the depth of the adjacent foundation pit increase.