工程地质学报2012，Vol.20Issue(1)：37-43,7.
开挖与降雨作用下边坡失稳机理及模拟分析
MECHANISM OF SLOPE FAILURE AND NUMERICAL SIMULATION ANALYSIS UNDER SLOPE EXCAVATION AND RAINFALL INFILTRATION
摘要
Abstract
Slope excavation and rainfall infiltration are often important factors affected slope stability. In this paper, the rebuilding of HuNan national highway is studied. Based on monitoring data and numerical analysis,the process of slope deformation is studied during the slope cutting and under rainfall conditions. The results show that the slope failure is a gradual process. Different factors can influence the slope stability and have different functions in the process. Slope excavation is the inciting factor which can lead to the failure of shallow slope body. For the slope is excavated, the stress balance of the slope body is destroyed. Slope body has a redistributed stress state. Then the shallow sliding surface is formed. The rainfall infiltration is the inciting factor leading to the deep sliding surface. The rainfall infiltrates the slope body along cracks. Deformation difference can increase on the both sides of shallow sliding surface. Then the pull-type landslide can be emerged. The high porewater pressure is in the interface between debris and strong weathered shale. The sliding zone is generated under the action of water-soil gradually. Consequently the deep sliding surface is emerged.关键词
边坡开挖/雨水入渗/位移监测/数值分析/边坡稳定性Key words
Slope excavation/Rainfall infiltration/Displacement monitoring/Numerical analysis/Slope stability分类
建筑与水利引用本文复制引用
肖超,金福喜,刘海鸿,张可能..开挖与降雨作用下边坡失稳机理及模拟分析[J].工程地质学报,2012,20(1):37-43,7.基金项目
湖南省自然科学基金项目(07JJ6070)资助. （07JJ6070）
