降雨类型对粉土边坡渗流及稳定性的影响  

Influence of Rainfall Types on Seepage and Stability of Silt Slope

作　　者：张石[1,2] 郑东健 武鑫[1,2] ZHANG Shi;ZHENG Dongjian;WU Xin(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210024,Jiangsu,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210024,Jiangsu,China)

机构地区：[1]河海大学水利水电学院,江苏南京210024 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210024

出　　处：《水力发电》2022年第9期34-39,共6页Water Power

基　　金：国家自然科学基金面上项目(52179128)。

摘　　要：为研究不同降雨类型下雨强峰值位置和出现次数对边坡渗流及稳定性的影响,以粉土边坡为例,采用Geo-studio对6种不同雨型下边坡土体体积含水率、孔压及湿润锋入渗深度的变化规律进行研究,探讨雨强峰值位置和出现次数对边坡稳定性的影响。结果表明,雨强峰值出现越早或出现次数越少,湿润锋入渗深度越深;雨强峰值出现越早或出现次数越多,边坡稳定性越差;前峰雨是所有雨型中最危险的雨型。In order to study the effects of the location and occurrence times of rainfall intensity peak of different rainfall types on the seepage and stability of slope,the silt slope is taken as an example,and the Geo-studio is used to study the variation law of volumetric moisture content and pore pressure of slope soil and infiltration depth of wetting front under six different rainfall types,then the effects of the location and occurrence times of rainfall intensity peak on slope stability are discussed.The results show that,(a)the earlier rainfall intensity peak appears or the less times it occurs,the deeper the infiltration depth of wetting front is;(b)the earlier rain intensity peak appears or the more times it occurs,the worse the slope stability is;and(c)the front peak rain is the most dangerous among all rain types.

关 键 词：土质边坡 稳定性分析 降雨类型 雨强峰值 降雨入渗 数值模拟 

分 类 号：TU432[建筑科学—岩土工程]