某超深地下连续墙成槽过程变形监测分析

Deformation monitoring analysis for a super-deep diaphragm wall trench construction

根据南京河西某基坑工程地下连续墙成槽试验,分析了地下连续墙成槽施工过程对槽壁周边土体变形的影响,试验结果表明:成槽机向下开挖时,土体不同深度出现不同程度向坑外的位移现象,成槽施工结束后,水平位移变化存在缓慢回弹趋势,单幅超深地下连续墙成槽过程槽壁周边土体变形对环境影响程度较小。

According to the diaphragm wall trench construction test of a foundation pit engineering in Nanjing Hexi area, analyse the influence of diaphragm wall during construction to surrounding soil deformation. The test results show that soil deformation in different depths appeared differ- ent displacement degrees when the trench was excavated. After the end of trench construction, the horizontal displacement had a slow rebound trend. The surrounding soil deformation of the trench had a little impact on the environment, when the single trench of super-deep diaphragm wall was constructed.