大变形有限元法分析边坡稳定性  

Using Large Deformation FEM on the Analysis of Slope Stability

作　　者：杨涛[1] 周德培[1] 苏金蓉[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]四川省地震局监测研究所,四川成都610041

出　　处：《山地学报》2006年第1期101-104,共4页Mountain Research

基　　金：社会公益研究专项基金资助项目(2001DIB20113)~~

摘　　要：边坡稳定性分析的重要任务是确定边坡潜在滑面的位置及相应的安全系数,鉴于坡体位移可在现场监测中直接得到,提出边坡潜在滑面确定的位移判据,采用大变形有限元首先计算出边坡的位移场,然后在开挖面的不同高度作塑性区内的水平位移参考线,依次连接参考线上的位移突变点即得到边坡失稳的潜在滑面位置,分析滑面上的应力以及岩体抗剪强度即得到边坡的整体安全系数。One of the most important tasks in the stability study of excavating slope is how to determinate the potential sllp surface. Thinking of the displacement is easy to get in the engineering, we put forward using the displacement criterion to determinate the slope slip surface. Firstly, calculate displacement field using large deformation FEM, secondly, make some horizon displacement reference line on the working plane in the plastic zone, then, find out the accident point of displacement on the reference line. When these points are joined by a line progressively, the potential slip surface is found. So, the stress on the surface can be get, and the safety factor of the slope can be gain by analyses the stress and the shear strength of the rock.

关 键 词：开挖边坡 潜在滑面 位移判据 数值计算 边坡稳定性分析 

分 类 号：P642.2[天文地球—工程地质学] TU457[天文地球—地质矿产勘探]