深大基坑降水开挖施工对结构及周边环境影响有限元分析

Finite element analysis of excavation of deep foundation pit dewatering and its influence on the surrounding environment

为分析深大基坑降水开挖施工对结构受力变形规律和周边环境的影响,采用有限元分析方法,分析基坑在不同连续墙厚度、入土深度和弹性模量条件下围护结构在各个开挖阶段的受力变形特征,发现土体压缩模量是连续墙受力变形的主要影响因素。文中分析基坑降水引起周围土体的固结沉降和水平变形规律,给出了基坑开挖和降水所引起沉降在总沉降中比重,为类似工程提供一定的借鉴。

In order to analyze the deep foundation pit construction effect on deformation and stress of the surrounding structure,the finite element analysis method is used to analyzed the foundation pit in different continuous wall thickness,buried depth and elastic modulus under the condition of excavation at every stage of the stress deformation characteristics.The soil compression modulus is the main factor affecting the continuous the deformation of the wall.Because the dewatering of foundation pit can cause the consolidation settlement and horizontal deformation of surrounding soil,this paper analyzes the proportion of settlement caused by foundation pit excavation and precipitation in total settlement.