地铁车站地下连续墙“二墙合一”深基坑施工技术

Construction Technology of “Two Walls Combined into One” Diaphragm Wall for Deep Foundation Pit in Subway Station

摘要:

“二墙合一”最大的特点是将单一挡土结构转换为地下室永久性结构的外墙。介绍了在复杂周围环境和地质条件下采用地下连续墙“二墙合一”基坑支护技术的施工实例，在超宽、超深地下墙施工过程中，采用了相应的技术措施，解决了成槽稳定和大面积钢筋笼起吊装和锁口管安放、起拔等施工难题，为在闹市区超深地下墙施工提供了经验。

Abstract:

“Two walls combined into one” means that single earth retaining structure is turned to be external wall of permanent basement structure. The paper introduced the construction case in complex surrounding environment and geological conditions with this technology. In super-wide and super-deep diaphragm wall construction, trenching stability, large diameter reinforcement cage hoisting and putting or drawing for fore shaft pipe were successfully performed, the experience was provided for super-deep diaphragm wall construction in downtown area.