暴雨作用下基岩软化对边坡稳定影响的研究  

Slope stability analysis of bedrock softening under heavy rain

作　　者：杨志刚[1,2] 江凌[3] 吴海真 

机构地区：[1]江西省水利科学院研究院,江西南昌330029 [2]南昌大学建筑工程学院,江西南昌330031 [3]江西省水利厅,江西南昌330009

出　　处：《江西水利科技》2012年第2期75-77,共3页Jiangxi Hydraulic Science & Technology

基　　金：国家自然科学基金项目(50909049);江西省教育厅科技项目(GJJ11341);江西省水利厅科技项目(KT201106)

摘　　要：本文针对暴雨情况下的边坡稳定问题,采用有限元强度折减法,结合边坡工程实例,考虑边坡岩体的非均质、不连续介质特征,以及岩体应力应变变化过程特性,对边坡敏感薄弱部位分正常工况与暴雨工况两种情况分别进行安全失稳分析.结果表明,边坡安全稳定问题主要是在暴雨作用下,滑块的结构层面基岩出现饱和水软化现象,其物理力学性能和强度有可能大幅度降低,进而导致边坡失稳.For this problem of the stability of the slope safety under the effect of the heavy rain, this paper uses the strength reduction finite element method, combined with the engineering example of slope, considered some characteristics of the rock, such as non-homogeneous, discontinuous, the process of change of stress-strain, to take the sensitive and weak parts of the slope points under the normal working conditions and heavy rain conditions for security stability analysis. The results show that the problems of safety and stability of slope are that it is found the saturated water softening phenomenon in the structural level slider of the bedrock, whose physical and mechanical properties and strength may be significantly reduced, leads to slope instability.

关 键 词：暴雨作用 饱和水 基岩软化 有限元强度折减 边坡稳定 

分 类 号：TU457[建筑科学—岩土工程]