富水深基坑边坡变形规律分析

Deformation law of water-rich deep foundation pit slope

为了研究富水深基坑的边坡变形规律,以某高铁站站前广场基坑开挖工程为研究背景,通过对基坑周边的地表沉降、边坡水平位移和地下水位进行持续动态监测,分析基坑开挖工序与边坡变形的关系。分析结果表明:(1)基坑周围地表沉降值随着基坑的开挖,沉降量不断增大,最终趋于稳定;(2)富水深基坑的开挖会导致边坡围护体系向坑内发生水平位移变形,且最大变形发生在基坑深度的2/3处;(3)富水深基坑的开挖会引起地下水位发生明显浮动。

In order to study the slope deformation law of water-rich deep foundation pit,this paper takes a foundation pit excavation project in high-speed railway station square as the research background,and analyzes the relationship between the excavation process and the slope deformation by continuously and dynamically monitoring the surface settlement,horizontal displacement and groundwater level around the foundation pit.The analysis results show that:(1)with the excavation of the foundation pit,the ground settlement around the foundation pit increases continuously and finally tends to be stable;(2)The excavation of water-rich deep foundation pit will lead to horizontal displacement and deformation of slope retaining system,and the maximum deformation occurs at 2/3 of the depth of foundation pit;(3)The excavation of deep foundation pit with rich water will cause the groundwater level to float obviously.