降雨入渗条件下非饱和黏土边坡稳定性分析  

Stability of Unsaturated Clay Slope under the Condition of Rainwater Infiltration

作　　者：杨迪惠 李建华[1] 

机构地区：[1]四川省核工业地质局二八一大队,四川西昌615000

出　　处：《四川地质学报》2017年第3期475-477,481,共4页Acta Geologica Sichuan

基　　金：国家自然科学基金项目(41072229)

摘　　要：大量研究表明,主要且直接诱发边坡失稳的主要因数是降雨,雨水入渗对非饱和土质边坡稳定性的影响最大。分析非饱和黏土边坡基质吸力和渗流场影响,采用有限元软件FLAC2D建立非饱和黏土边坡的数值模型,研究计算在降雨强度不同条件下,降雨时间相同和降雨总量相同这两种情况对边坡稳定性的影响。结果表明:非饱和黏土边坡内部的剪应变增量随降雨强度的变大而增大,边坡的位移也和降雨强度呈正相关关系,降雨强度越大越容易造成黏土边坡表层失稳。This paper deals with stability of unsaturated clay slope under the condition of rainwater infiltration. The study indicates giant influence of rainfall infiltration on stability of clay slope. A numerical model of unsaturated clay slope is established by the use of finite element software FLAC2D which is used for calculating the influence of rainfall on slope stability. The results indicate that shear strain increment and displacement of unsaturated clay slope increase with rainfall intensity.

关 键 词：黏土边坡 降雨 数值模型 稳定性分析 

分 类 号：P642.2[天文地球—工程地质学]