降雨对水库边坡稳定性影响研究  

Study on the Influence of Rainfall on the Stability of Reservoir Slope

作　　者：李政勰 LI Zhengxie(Henan Provincial Water Conservancy Resettlement Affairs Center,Zhengzhou 450003,China)

机构地区：[1]河南省水利移民事务中心,河南郑州450003

出　　处：《河南水利与南水北调》2024年第11期73-75,共3页Henan Water Resources & South-to-North Water Diversion

摘　　要：水库边坡的稳定性直接关系到水库的安全运行、水资源的有效利用以及周边生态环境的保护。降雨作为自然界的常见现象,对边坡稳定性的影响较大,尤其是在暴雨或连续降雨条件下,边坡易发生滑坡、塌陷等灾害,对水库结构安全构成严重威胁。通过建立数值模型,对不同降雨强度下边坡开挖前后的稳定性进行分析,研究结果表明:边坡浸润线在降雨量较大时逐渐向内收缩,且收缩程度随着降雨的持续而逐渐增大。同时在不同降雨工况下,边坡安全系数均随降雨的持续呈现不断减小趋势,并在高降雨强度下尤为明显;与开挖前相比,边坡开挖后的安全系数有所降低,且降雨量对边坡安全系数的影响也更加明显。除此之外,边坡安全系数在不同降雨强度下的减小幅度远大于开挖活动。The stability of reservoir slope is directly related to the safe operation of the reservoir,the effective utilization of water resources,and the protection of the surrounding ecological environment.As a common phenomenon in nature,rainfall has a great impact on the stability of slope,especially under the condition of storm or continuous rainfall,and the slope is prone to landslide or collapse,which poses serious threat to the safety of the reservoir structure.A numerical model is established to analyze the stability of slope before and after excavation under different rainfall intensities.The study results show that the slope saturation line gradually shrinks inward in case of heavy rain,and the shrinkage degree gradually increases as the rain continues.Meanwhile,under different rainfall conditions,the slope safety factor decreases gradually as the the rain continues.,especially obvious under high rainfall intensity.Compared with that before excavation,the safety factor of the slope after excavation is reduced,and the influence of rainfall on the safety factor of the slope is more obvious.In addition,the decrease of the slope safety factor under different rainfall intensities is much greater than that of excavation activities.

关 键 词：水库边坡 降雨强度 浸润线 安全系数 

分 类 号：TV223[水利工程—水工结构工程]