某水电站雾化区边坡降雨入渗及稳定性分析  

Seepage Calculation and Stability Analysis of Discharging Atomization Slope for Hydropower Station

作　　者：邓云瑞[1,2] 黄凯[1] 张伯涛[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]武汉大学水工岩石力学教育部重点实验室,湖北武汉430072

出　　处：《水电能源科学》2011年第4期114-117,179,共5页Water Resources and Power

基　　金：国家自然科学基金资助项目(50979081);"十一五"国家科技支撑计划基金资助重大项目(2008BAB29B01)

摘　　要：基于某水电站右岸高边坡基本地质条件和雾化雨资料,采用饱和-非饱和渗流有限元分析方法,研究了边坡在雾化雨条件下的渗流场变化规律,并借鉴非饱和强度理论,运用强度折减法分析了雾化雨对边坡稳定性的影响。分析结果表明,雾化雨条件下地表水入渗将导致非饱和区范围缩小、压力水头升高并出现局部暂态饱和区;考虑非饱和区强度变化及饱和区渗透力影响,降雨入渗时边坡稳定性将明显下降。Based on analyzing engineering geological conditions of the right slope of hydropower station and the data of atomized rainfall,the basic rule of the slope seepage field under the condition of fogging rain is obtained by using the method of saturated-unsaturated seepage FEM.And based on unsaturated strength theory,slope stability influenced by fogging rain is analyzed with the strength reduction method.The results show that the range of unsaturated zone would decrease by infiltration of surface water;and the pressure water head would increase and the transient saturated zone would appear under the conditions of fogging rain.The factor of safety of engineering slope would obviously decrease due to the unsaturated zone strength decreasing and the load changing of saturated zone seepage.

关 键 词：雾化雨 边坡工程 降雨入渗 饱和非饱和渗流 强度折减法 

分 类 号：TV139.14[水利工程—水力学及河流动力学] P642[天文地球—工程地质学]