圆形深基坑变形特性分析

Monitoring data characteristics and deformation analysis of circular deep foundation pit

依托福建地区某圆形深基坑工程背景,结合基坑监测数据分析土方开挖对圆形基坑围护结构的影响,再借助理论计算对基坑进行数值模拟并与监测数据作对比,重点探讨了圆形基坑的变形特性。结果表明:计算数值与实际监测数据大体一致、互相验证;圆形围护结构受力特点明显,圆拱空间效应明显,有效限制了围护结构的变形情况;圆形基坑深层水平位移呈“中间大,两头小”的曲线形状。

Based on the engineering background of a circular deep foundation pit in Fujian,combined with the foundation pit monitoring data,this paper analyzes the impact of earth excavation on the retaining structure of circular foundation pit,then carries out numerical simulation of the foundation pit with the help of theoretical calculation and compares it with the monitoring data,focusing on the deformation characteristics of circular foundation pit.The results show that the calculated values are generally consistent with the actual monitoring data and verified each other;the circular retaining structure has obvious stress characteristics and obvious spatial effect of circular arch,which effectively limits the deformation of the retaining structure;the deep horizontal displacement of circular foundation pit shows a curve shape of"large in the middle and small at both ends".