摘要
基于库仑土压力理论的假设,采用水平薄层单元法得到了可综合考虑三种基本位移模式的土压力强度一阶微分方程;将摩擦角与墙体位移间的关系式引入,建立了可同时考虑基本变位模式和位移量的挡土墙主动土压力计算模型。利用MATLAB对微分方程进行数值积分和最优化法搜索直线滑动面的位置。通过与实测数据进行对比分析,结果表明模型计算结果与试验结果较吻合。
Based on the assumption of Coulomb theory,first order differential equation considering three kinds of basic displacement patterns of earth pressure was obtained by horizontal thin element method.The relation between the angle of friction and displacement of wall was introduced in the equation.Thus calculation model of active earth pressure was established so that this model can consider both the displacement pattern and displacement value.Through numerical integration and optimum search,the position of slip plane was searched by numerical integration and optimization with MATLAB software.Comparing with the field test data,the calculation values well agreed with the test results.
出处
《土工基础》
2010年第2期84-87,共4页
Soil Engineering and Foundation
关键词
刚性挡土墙
主动土压力
位移模式
非极限状态
rigid retaining walls
active earth pressure
pattern of displacement
non-limit state
