深基坑高水位内降水井的超前止水封堵施工技术

Construction Technology of Advanced Water Stopping and Plugging for Internal Dewatering Well in High Water Level of Deep Foundation Pit

为解决深基坑高水位内降水井封堵时大量涌水而造成施工困难和封堵质量存在缺陷的问题,以兰州市轨道交通1号线一期工程沿线站点附属人防工程迎门滩站项目为例,利用“瓶塞”原理,总结提出圆木“瓶塞”超前封堵止水的施工方法。经现场施工检验,此方法施工简单,封堵质量好,可为类似工程提供借鉴。

To solve the problems of construction difficulties and defects in plugging quality caused by a large amount of gushing water from internal dewatering well in high water level of deep foundation pit,taking Yingmentan Station project of Lanzhou Rail Transit Line 1 phase I project as an example,the construction method of using log"plug"to perform advanced water stopping is summarized and put forward.The on-site construction inspection shows that this method is simple in construction and good in plugging quality,which can provide reference for similar projects.