降雨过程中的边坡失稳研究  

Research on slope instability process under rainfall condition

作　　者：詹青文[1] 刘仁德[1] 

机构地区：[1]江西省水利规划设计院,江西南昌330029

出　　处：《人民长江》2011年第11期103-106,共4页Yangtze River

摘　　要：根据区域降雨时空分布特征、自然边坡的岩土结构组成及其物理力学特性,引入降雨入渗条件下饱和-非饱和渗流数值模拟技术,以江西省德兴市双溪电站某滑坡体为研究对象,进行了降雨过程的饱和-非饱和渗流场稳定性分析。并在此基础上采用刚体极限平衡分析方法中的Morgenstern-Price法,模拟计算了各降雨过程边坡的稳定性。研究结果表明:降雨特征(雨强、雨型)对边坡稳定性的影响不容忽视;边坡最小安全系数在雨后8～12 h达到最低值。According to spatial-temporal distribution features of regional precipitation,structural composition and mechanical parameters of natural slope,by introducing saturated-unsaturated infiltration numerical simulation technology under rainfall infiltration condition,we conduct a stability analysis of saturated-unsaturated seepage field for a landslide body under rainfall infiltration condition,which is located at the site of Shuangxi Hydropower Station in Jiangxi Province.And,the stability of the landslide under various rainfall conditions is analyzed by Morgenstern-Price method of rigid limit equilibrium method.The results show that influences of rainfall characters,such as rainfall intensity,rainfall type,on stability of slope can not be ignored;the safety factors of slope drop to the lowest 8～12 h after the rainfall ending.

关 键 词：边坡 滑坡体 饱和-非饱和渗流场 降雨过程 稳定性 

分 类 号：P642.22[天文地球—工程地质学]