邻近老旧住宅地铁深基坑施工规律分析

Analysis of deep foundation pit construction in subway adjacent to old residential buildings

地铁深基坑周边环境较为复杂,控制既有建筑物及周边环境变形是基坑工程的重点。本文研究了杭州软弱地层地铁深基坑围护结构、周边建筑物变形规律,探讨了围护结构侧向位移与土体水平位移之间的关系。结果表明,围护结构侧向位移曲线呈S型,伺服钢支撑可减小围护结构侧向位移,但轴力过大会使围护结构向坑外方向变形;地下连续墙侧向变形和土体水平变形呈线性关系。

The surrounding environment of subway deep foundation pit is complex,and controlling the deformation of existing buildings and surrounding environment becomes the focus of excavation engineering.This paper studies the deformation law of deep foundation pit enclosure structure and surrounding buildings in soft soil strata in Hangzhou,and explores the relationship between the lateral displacement of enclosure structure and the horizontal displacement of soil.The results show that the lateral displacement curve of enclosure structure is S-shaped,and servo steel support can reduce the lateral displacement of enclosure structure,but excessive axial force can cause the deformation of enclosure structure towards the outside of the pit.And there is a linear relationship between the lateral deformation of underground continuous wall and the horizontal deformation of soil.