地形和土层参数对边坡屈服加速度及滑动面影响研究  

Influence of topographic and soil parameters on yield acceleration and critical slip surface of slopes

作　　者：王国伦 宋健 Wang Guolun;Song Jian(College of Mechanics and Materials,Hohai University,Nanjing 211100,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineerings Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学力学与材料学院,江苏南京211100 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098

出　　处：《山西建筑》2018年第8期41-43,共3页Shanxi Architecture

基　　金：国家自然科学基金项目(41602280);中国博士后科学基金项目(2016M601708)

摘　　要：采用有限差分软件FLAC 2D研究了不同地形和土层边坡的稳定性参数及滑动面特性。基于Mohr-Coulomb强度理论,通过拟静力法逐步增加水平向惯性力得到边坡屈服加速度,通过识别坡体最大剪应变增量位置确定边坡临界滑动面形状。分析不同坡高、坡角以及土体特性参数条件下边坡安全系数、屈服加速度及滑动面几何形状变化规律,得出了一些有意义的结论。The stability parameters and critical slip surface of earth slopes with various topography and soil-layer properties are investigated by using the finite difference code FLAC 2D.Based on the Mohr-Coulomb criterion,the yield coefficient of slopes was determined through pseudostatic analyses by incrementally increasing the horizontal component of gravitational acceleration of the numerical model.The critical sliding surface was characterized by searching the positions within the slope where have a large shear strain increment.The factor of safety,yield coefficient and the geometry of the sliding surface of slopes with different heights,inclinations and soil types are compared,some meaningful conclusions have been drawn.

关 键 词：边坡地形 土层特性 屈服加速度 滑动面 

分 类 号：P642.22[天文地球—工程地质学]