考虑降雨拉张裂缝作用的库岸边坡稳定性分析  

Stability Analysis of Reservoir Bank Slope Considering Tensile Crack by the Action of Rainfall

作　　者：于婷婷[1] 顾圣平[1] 邵雪杰[1] 何海祥[1] 曹爱武[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《人民黄河》2017年第4期104-107,共4页Yellow River

基　　金："十二五"国家科技支撑计划项目(2013BAB06B01)

摘　　要：降雨对库岸边坡的失稳有刺激作用,尤其是降雨过程中坡体产生的拉张裂缝对其稳定性影响更大。考虑降雨作用下产生的裂缝,构建拉张裂缝模型,确定拉张裂缝的位置及深度,并用剩余推力法计算水库蓄水时边坡的稳定性系数。以某水库的库岸边坡为例,计算了水库在正常蓄水位时,不同降雨强度和降雨历时下的稳定性系数,结果表明降雨强度和降雨历时与裂缝的位置和边坡的稳定性存在密切的关系。Rainfall has a stimulating effect on the stability of reservoir bankslope,especially the tensile crack caused by rainfall has a greatinfluence to the stability of the slope. Considering crack under the action of rainfall,this paper built pull tension crack model to calculate thelocation and depth of tension cracks and calculated the stability coefficient with the residual thrust method. Taking a slope of the reservoir asan example,the paper calculated stability coefficient of slope under different rainfall intensities and durations when the reservoir was at nor-mal water level. The calculation results show that there is a close relationship between the rainfall intensity and duration and the location ofthe crack and the stability coefficient of the slope.

关 键 词：降雨 库岸边坡 拉张裂缝模型 剩余推力法 稳定性 

分 类 号：P642.22[天文地球—工程地质学]