紧邻多条轨道交通运营线路的超大面积深基坑设计

Design on Overlarge Area of Deep Foundation Pit Adjacent to Several Rail Traffic Operation Lines

铁路上海站北广场基坑为超大面积深基坑工程,紧邻多条运营中地铁线路,周边环境保护要求极高。针对该基坑形状极不规则、地质条件复杂、工期紧迫的特点,对基坑采取了分区实施、各区选用不同的支护结构设计方案。实施结果标明,该设计既保证了基坑的顺利实施,也保证了周边运营中地铁线路的安全,同时也为以后类似工程提供了借鉴。

The foundation pit of Shanghai Railway Station North Square is an overlarge area of deep foundation pit project adjacent to several metro lines under operation,and its surrounding environmental protection is very high required.Aiming at the characteristics of irregular shape of this pit,complicated geological condition and limited construction period,the foundation pit is constructed by zones,and every zone is used of the different supporting structural design schemes.The result of implementation shows that this design can guarantee the smooth implementation of foundation pit,and also ensure the security of the surrounding metro lines under operation,which can be also referred for the similar projects in the future.