某基坑维护工程事故原因分析及处理  

Causation Analysis and Treatment of Foundation Pit Maintenance Engineering Accidents

作　　者：龙琦[1] 杨光辉[1] 刘新[1] 

机构地区：[1]中国煤炭地质总局华盛公司水文地质勘察工程公司,河北邯郸056004

出　　处：《中国煤田地质》2007年第A02期77-79,84,共4页Coal Geology of China

摘　　要：某建筑物基坑开挖深度约4.5m,而本地的稳定地下水位埋深约3～3.1m,内外水位差约2～2.4m,为此采用灌注桩、水泥土搅拌桩及高压旋喷桩围护。基桩开挖过程中,其东南角出现漏水、流土及"涌沙"等现象,经查验认定为地水管线等因素影响了桩墙的塔接,致使河流及城市地水排水管线渗水,对基坑围护产生破坏作用,对此采取三种处理方案进行治理,确保了工程的顺利进行。The foundation pit of a building＇s depth of excavation is about 4.5m, while the groundwater steady water level is 3-3.1m, water head 2-2.4m, thus the cast-in-place, soil-cement mixing and high pressure jet-grouted piles are used. During the foundation pit excavation, leakage, soil flow and sand inrush were happened at the southeastern corner. After checking, found out one of the causation is a result of water pipeline affected pile wall joint lapping, caused river and urban drainage pipeline water seepage destructed foundation pit enclosing and put forward three treatment schemes to control and ensuring the engineering going smoothly.

关 键 词：基坑维护 流土 涌砂 渗水 灌注桩 隔水幕墙 

分 类 号：TU46[建筑科学—结构工程]