紧邻地铁大型深基坑群坑施工方法研究

Research on Construction Method of Large Deep Foundation Pit and Group Pit Construction Adjacent to Subway

以上海张江中区单元56-01地块、57-01地块项目基坑施工为背景工程,对群坑施工关键技术进行了研究。通过对群坑进行合理分区分块施工,地下室底板采用跳仓法施工,并在部分支撑上加设伺服轴力自动补偿系统,减少了基坑施工对邻近的轨道交通13号线区间隧道的影响,为类似紧邻地铁的深基坑群坑施工提供了参考。

Taking the foundation pit construction of block 56-01 and block 57-01 of Zhangjiang Central District Unit in Shanghai as a case study,the key technology of group pit construction is studied.Group pits are reasonably divided into blocks for construction.The basement floor is constructed using alternate bay construction method,and a servo axial force automatic compensation system is implemented on some supports.Therefore,the impact of the foundation pit construction on the adjacent tunnel of rail transit line 13 is reduced.It provides a reference for the construction of deep foundation pit groups similar to the subway.