岩土力学2013，Vol.34Issue(6)：1536-1540,1559,6.
降雨渗流及干湿循环作用下红砂岩顺层边坡稳定性分析
Stability analysis of red sandstone bedding slope under rainfall infiltration and dry-wet cycling
摘要
Abstract
According to the stability of red sandstone bedding rock slope,a mechanical model is established; the hydraulic effect on slope under rainfall infiltration is calculated.Selecting a typical structural plane,through dry-wet cycling test,strength attenuation law of structural plane is analyzed.Comprehensive considering the rainfall infiltration and dry-wet cycling,the stability analysis of red sandstone bedding slope is analyzed; and the stability attenuation law is achieved.At last,by slope stability monitoring of Yan-Ru expressway,theoretical calculation results are verified.The results show that the hydraulic action is proportional to the water height in rock crack.Under dry-wet cycling,the cohesion of structural surface decays in the form of power function; and the internal frictional angle decays in the form of quadratic function.The slope stability has linear relationship with water height in rock crack and exponential relationship with dry-wet cycling.The dry-wet cycling has a greater influence on slope stability than that on water height in rock crack.Under the combined action of rainfall infiltration and dry-wet cycling,slope stability coefficient reduces by about 66％.Compared with considering single influence factor,the stability coefficient attenuation range has a great increase.The slope stability monitoring results agree well with theoretical results,the validity of theoretical results is further proved.关键词
降雨渗流/干湿循环/红砂岩顺层边坡/稳定性分析/衰变规律Key words
rainfall infiltration / dry-wet cycling / red sandstone bedding slope / stability analysis / deterioration law分类
交通工程引用本文复制引用
曾胜,李振存,韦慧,郭昕,王健..降雨渗流及干湿循环作用下红砂岩顺层边坡稳定性分析[J].岩土力学,2013,34(6):1536-1540,1559,6.基金项目
国家西部交通建设科技项目(No.2011318824350) （No.2011318824350）
公路工程省部共建教育部重点实验室(长沙理工大学)开放基金资助项目(No.kfj110104) （长沙理工大学）
教育部新世纪优秀人才支持计划资助项目(No.NCET-11-0977). （No.NCET-11-0977）
