昌波水电站地下厂房边坡降雨入渗数值分析  

Numerical Analysis of Rainfall Infiltration into Underground Powerhouse Slope in Changbo Hydropower Station

作　　者：叶雨柯 于浩 马亚楠 任旺 YE Yuke;YU Hao;MA Ya nan;REN Wang(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei,China;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education,Wuhan University,Wuhan 430072,Hubei,China)

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：《水力发电》2022年第2期36-41,60,共7页Water Power

基　　金：国家重点研发计划课题(2018YFC0407001)。

摘　　要：降雨下渗引起的坡体渗流场变化是诱发边坡失稳的主要因素之一。基于昌波水电站工程,选取地下厂房区含垂向结构面边坡的典型剖面,建立二维等效连续介质有限元模型,利用饱和-非饱和渗流分析理论,研究不同降雨强度下含垂向结构面边坡的饱和区扩散范围及水压力分布变化,并对坡表防护效果进行分析评价。对不同工况下运行期边坡水头分布及洞室出流量进行了模拟与预测,为进一步研究降雨入渗对边坡稳定的影响及水电站的建设和安全运行提供了依据。The variation of seepage field caused by rainfall infiltration is one of the main factors inducing slope instability.Based on Changbo Hydropower Station Project,a 2D equivalent continuum FEM across the typical section that contains vertical structures in the underground powerhouse region is established,and the saturated-unsaturated seepage analysis method is used to predict the change of saturated zone and water pressure distribution in the slope under different rainfall intensity.The protective effect of slope surface protection is estimated.The water head distribution in the slope and cavern discharge during different operating conditions are also modeled,which provides a basis for further study of the influence of rainfall infiltration on slope stability and the construction and safe operation of hydropower station.

关 键 词：边坡稳定 降雨入渗 饱和-非饱和渗流 等效连续介质模型 昌波水电站 

分 类 号：TV139.1[水利工程—水力学及河流动力学] TU457[建筑科学—岩土工程]