挡土墙加固岩土边坡的最小势能分析方法  

Stability Analysis for Slope with Retaining Wall Based on Minimum Potential Energy Method

作　　者：陆洋[1] 李铀[2] 周文权[1] 

机构地区：[1]湖南工程学院建筑工程学院,湘潭411104 [2]中南大学土木建筑学院,长沙410075

出　　处：《湖南工程学院学报（自然科学版）》2009年第4期83-85,共3页Journal of Hunan Institute of Engineering(Natural Science Edition)

基　　金：湖南省科技厅计划资助项目(2007FJ3072)

摘　　要：最小势能边坡稳定性分析方法是一种正处于发展完善中的新型边坡稳定分析方法,本文结合土力学经典库伦土压力理论将最小势能分析方法的基本原理应用到挡土墙后土体的稳定性分析中.根据最小势能原理求出滑移面的法向应力,从而得到沿整个滑移面的抗滑力,由力矩平衡条件解出稳定系数.通过大量的算例把最小势能方法和常见的极限平衡法进行挡土墙后土体稳定分析的结果作了对比研究和误差分析.结果表明最小势能方法求取安全系数的过程简洁、概念明确合理、结果可显式表示,与极限平衡方法或有限元方法等相比,更具有实用价值.Stability analysis method of slope based on minimum potential energy （MPE） principle is a new kind of method in development. In this article, according to the Coulomb earth pressure theory, we apply the MPE method to stability analysis for slope with retaining wall. Based on the principle of the equilibrium system,potential energy should be the minimum,a small displacement will be solved and the normal stress distributed along the sliding surface can be achieved. For uniform slope,the safety factor can be obtained directly considering the equilibrium conditions and the Mol-Coulomb intensity rule. Then we put forward the error analysis between the MPE method and the traditional limited equilibrium method in stability analysis for slope with retaining wall. In general, the concept of minimum potential energy method of slope stability is concise and reasonable; solving process for safety factor is concise; and the expression of safety factor can be expressed as explicit function. Compared with limit equilibrium method and finite element method, and so on, it has clear value for engineering application.

关 键 词：边坡稳定 最小势能法 挡土墙 安全系数 

分 类 号：TU457[建筑科学—岩土工程]