摘要
本文基于考虑横向剪切变形的Ｍｉｎｄｌｉｎ厚板理论，建立了深基坑围护结构变形的三维 有限元分析模型，并编制了相应的计算程序。该模型能模拟地基的流变性态、支撑方式的变 化、板－土之间的接触摩擦以及基坑分步开挖过程，可按墙体位移的变化自动修正土压力。 计算实例表明，本文建立的三维有限元分析模型可考虑围护墙体位移因基坑开挖而引起的空 间效应以及由地基流变而引起的时间效应，可以计算墙体任意时刻任意位置的变形，是一种 简便而又实用的三维分析方法。
In this paper, three-dimensional finite element model was set up to study the deformation of the retaining structure of deep foundation pit on the basis of Mindlin's thick plate theory that takes into account transverse shear deformation A finite element program was developed. The model can simulate rheogram of ground different patterns of supports, contact friction between plate and clay, processes of excavation. and can revise soil pressure automatically according to displacements of wall. The results show that the model can consider the space effect of deformation of retaining wall due to excavation and the time effect due to rheology of foundation. The deformation of wall at any time in everywhere can be calculated based on the developed FE program. It is shown that the model is practical and convenient for three-dimensional analysis.
出处
《工程力学》
EI
CSCD
北大核心
2000年第2期134-141,共8页
Engineering Mechanics
关键词
深基坑
三维有限元模型
软土
围护结构
变形
deep foundation pit, three-dimensional finite element model, foundation model, retaining structure
thick plate theory
