中风化粉砂质泥岩基坑涌水综合治理施工技术

Comprehensive Construction Technology for Water Inflow Control in Weathered Silty Mudstone Foundation Pits

基坑涌水是基坑塌陷的风险之一。为了避免基坑塌陷,针对中风化粉砂质泥岩基坑涌水存在出水急、出水量大的实际情况,提出“注浆+明排”的综合治理方案,并优化注浆位置、深度,调整集水井位置及平面尺寸。方案实施结果表明:通过增加注浆深度、加密注浆孔位,增加明排集水井能够有效减少基坑渗水、涌水,对于保证施工安全具有十分重要的意义。

Water inflow from foundation pit is one of the risks of foundation pit collapse.In order to avoid foundation pit collapse,a comprehensive treatment plan of“grouting+open drainage”was proposed in view of the actual situation of rapid water outflow and large water outflow in the weathered silty mudstone foundation pit,and the grouting position and depth were optimized and the concentration was adjusted.Well location and plan dimensions.The implementation results of the plan show that by increasing the grouting depth,densifying the grouting hole positions,and adding open drainage wells,water seepage and water inflow in the foundation pit can be effectively reduced,which is of great significance for ensuring construction safety.