换乘车站地下连续墙交界位置防渗漏施工技术

Leakage prevention construction technology at the junction of underground diaphragm wall of transfer station

地下连续墙作为地下车站围护结构在国内已得到广泛应用,在富水地层中,地下连续墙的止水效果是车站基坑开挖安全保障的关键。通常在换乘车站,由于施工的先后,新旧地连墙交界位置混凝土无法结合密实,基坑开挖过程易出现接缝处渗水,对基坑安全有较大影响,这必须引起我们高度重视和关注。本文基于作者自身的实际工作经验,主要以南宁地铁3号线安吉客运站为例,对地铁换乘车站地连墙交界位置防渗漏施工技术进行了分析、探讨,以期能为类似施工提供参考。

Underground continuous wall as the underground station envelope structure has been widely used in China, in the water-rich stratum, the diaphragm wall of the water stop effect is the key to excavation safety. Usually in the transfer station, due to the construction of the order, the junction of old and new wall with concrete can not be combined with dense, pit excavation process prone to seepage seams, have a greater impact on the safety of foundation pit, which must cause us to attach great importance and attention. Based on the author＇s own practical work experience, this paper mainly analyzes and discusses the anti-leakage construction technology at the junction of the wall to the transfer station at Nanning Subway Line 3 Anji Bus Station, in the hope of providing a reference for similar construction.