富水砂层深基坑墙体渗漏灾害与对策分析

Analysis and Countermeasures of Deep Foundation Excavation Walls Leaking Hazard in Water⁃rich Sandy Strata

为研究富水砂层深基坑施工期间止水帷幕渗漏事故频发的原因及有效对策,以某地铁车站深基坑工程发生的2起渗漏事故为例,详细回顾了事故发展过程,对其主要原因进行探究,同时系统总结了事故预防处理措施。结果表明:地层自身复杂的水文地质条件、施工质量及人为因素是导致渗漏事故频发的主要原因;根据“提前预防、应急堵漏和后续加固”的处置方法可有效控制灾害发展,降低对邻近敏感建(构)筑物的危害。

To study the causes and effective countermeasures of frequent leakage accidents of water⁃resistant curtain during the construction of deep foundation excavation in water⁃rich sand strata,two leakage accidents occurred in the deep foundation excavation project of a subway station were taken as an example.The development process of the accidents was reviewed in detail,the main causes were explored,and the accident prevention and treatment measures were systematically summarized.The results show that complex hydrogeological conditions,imperfect construction quality,and some human factors are mainly responsible for these frequent leakage accidents.By adopting the disposal methods of early prevention,emergency plugging and subsequent reinforcement,the development of disasters can be effectively controlled and the harm to adjacent sensitive buildings or structures can be reduced.