软土深基坑施工监测与数值模拟分析

Monitoring and Numerical Simulation of Deep Foundation Pit Construction in Soft Soil

以上海地区某深基坑工程为研究背景,分析了施工过程中围护结构和周边环境的监测数据,为了对基坑围护设计方案进行校核优化,采用FLAC3d软件建立了数值计算模型,对比分析了监测数据和数值模拟结果,研究了地下连续墙的厚度、深度、内支撑截面尺寸等设计参数对围护结构变形和基坑周边土体沉降的影响,可为软土地区深基坑工程的围护结构设计提供经验和依据。

Taking a deep foundation pit project in Shanghai as research background,the monitoring data collected from the retaining structures and adjacent environments during construction was analyzed.To optimize the design of the retaining structure of the foundation pit,a numerical calculation model was established by using the FLAC3d software.A comparative analysis was carried out between the monitoring data and the numerical simulation outcomes.The influence of various design parameters such as the thickness,depth,and cross-sectional dimensions of internal support of the underground diaphragm wall on the deformation of the retaining structure and the settlement of adjacent soils around the foundation pit was studied.The findings presented herein can provide valuable insights and foundational guidance for the design of retaining structures in deep foundation pit projects in soft soil terrains.