基于有限元法的均质土坝渗流安全评价分析与应用

Analysis and application of seepage safety evaluation for homogeneous earth dams based on finite element method

本文以重庆市新民水库为例,采用有限元法对水库主坝、副坝分别进行渗流计算。设定五种计算工况,经计算结果分析,大坝最大渗透比降为0.323,小于发生流土的允许比降;最大出逸比降为0.323,小于允许水力比降0.712。结合溢洪道、放水设施、反滤排水设施实地排查结果,工程渗流性态安全,评定新民水库大坝渗流安全等级为A级。

This paper takes Xinmin Reservoir in Chongqing City as an example and uses the finite element method to calculate the seepage of the main dam and auxiliary dam of the reservoir.Five calculation scenarios are set,and based on the computed results analysis,the maximum seepage coefficient of the dam is reduced to 0.323,which is lower than the allowable coefficient for soil erosion.The maximum outflow coefficient is 0.323,which is lower than the allowable hydraulic coefficient of 0.712.Combined with the on-site investigation results of spillways,discharge facilities,and anti-filtration drainage facilities,the seepage safety of the project is confirmed,and the seepage safety grade of Xinmin Reservoir dam is assessed as Class A.