地铁车站富水砂层地下连续墙施工风险分析

RISK ANALYSIS ON GROUND CONNECTION WALL WATER RICH SAND LAYER OF SUBWAY STATION

目前,受地下环境较为严峻的影响,部分城市的地铁车站建设位置存在软弱地层,规划设计时对地下的勘查不够细致或规划地铁时无法避免地将地铁交通建立在富水砂层处,在土方开发的阶段很容易出现地下水渗出或涌砂的情况,若对地质条件的勘查不到位则可能发生安全事故。因此,做好地铁车站围护结构(地下连续墙),减少事故发生非常有必要。对地铁车站地下连续墙维护结构进行分析,从而将事故发生的原因阐述清楚并提出防治方法,为地铁车站施工提供借鉴思路。

At present,due to the severe impact of the underground environment,the construction location of subway stations in some cities has weak stratum.The underground survey in planning and design is not detailed enough or the subway traffic cannot be avoided in the water-rich sand layer when planning the subway.In the development stage,groundwater seepage or sand gushing is prone to occur.If the geological conditions are not investigated in place,safety accidents may occur.Therefore,it is very necessary to do a good job of the subway station enclosure structure(ground connecting wall)to reduce accidents.The maintenance structure of the connecting wall of the subway station is analyzed,so as to explain the cause of the accident clearly and put forward the prevention method,and provide a reference for the construction of the subway station.