深基坑开挖周边土体沉降数值模拟研究

Research on soil settlement around deep foundation pit excavation with numerical simulation

基坑开挖过程中地表土位移的监测对于基坑稳定性具有十分重要的意义,准确的基坑监测能有效地防止基坑土体坍塌,避免事故的发生。应用基坑开挖技术,利用有限元软件建立基坑二维模型,模拟基坑的开挖过程,对基坑土体开挖过程中地表土的沉降进行分析,总结出基坑开挖引起的地表土沉降最大影响区和次要影响区。

The monitoring of surface soil displacement during foundation pit excavation is of great significance for the stability of foundation pit.Accurate foundation pit monitoring can effectively prevent the collapse of foundation pit soil and avoid accidents.This paper first introduces the foundation pit excavation technology,then uses the finite element software to establish the two-dimensional model of the foundation pit,simulates the excavation process of the foundation pit,analyzes the settlement of the topsoil during the excavation of the foundation pit,and summarizes the foundation pit.The maximum affected area and the secondary affected area of the external topsoil settlement caused by excavation.