地铁通道口非常规地下连续墙施工关键技术

Key Technology of Construction of Unconventional Underground Diaphragm Wall at Entrance of Subway

某项目下沉式广场6号坑由于改造需要,需对原地铁地下通道进行拆除后重建,需设置地下连续墙,其中部分地墙跨原结构外墙设置,处于原通道结构与地面交接处;部分地墙位于原结构顶板与斜坡段之间,地墙一侧临空,与常规地墙施工有着很大不同,施工难度极大。对不同工况的地墙采用了不同的施工技术措施,克服了施工过程中出现的难题,保证了地墙施工的质量和安全,可为类似工程提供参考。

Due to transformation needs of No.6 pit of the sunken plaza of this project,the original subway underground passage needs to be demolished and reconstructed.An underground diaphragm wall needs to be installed.Part of ground wall is set across outer wall of original structure.Part of the ground wall is located between roof of original structure and slope section,and one side of the ground wall is empty,which is very different from conventional ground wall construction,and the construction is extremely difficult.The project adopts more targeted construction technical measures for ground wall under different working conditions,which overcomes difficulties in the construction process and ensures quality and safety of ground wall construction,which can provide reference for similar projects.