多断层影响下某水库三维渗流数值模拟分析  

Numerical Simulation and Analysis of Three-dimensional Seepage in a Reservoir Under Influence of Multiple Faults

作　　者：俞扬峰 于家傲 叶伟[1,3] 李子阳 YU Yang-feng;YU Jia-ao;YE Wei;LI Zi-yang(Nanjing Hydraulic Research Institute,Nanjing 210029,China;College of Water Conservancy&Hydropower Engineering,Hohai University,Nanjing 210098,China;Dam Safety Management Center of the Ministry of Water Resources,Nanjing 210029,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]河海大学水利水电学院,江苏南京210098 [3]水利部大坝安全管理中心,江苏南京210029

出　　处：《水电能源科学》2023年第10期86-90,共5页Water Resources and Power

基　　金：国家自然科学基金黄河水科学研究联合基金项目(U2243244);中央级公益性科研院所基本科研业务费专项资金(Y721008)。

摘　　要：某水库库区及坝址地质条件复杂,存在多条贯穿性断层,为分析库区渗漏及坝体渗流情况,采用有限元法对大坝及库区开展三维渗流场数值模拟,针对实际运行工况进行参数反演,并根据大坝水头分布、渗流量计算结果对大坝防渗安全性进行分析评价。结果表明,库区断层渗透系数的变化对左岸及坝体段渗流量的影响最明显,左岸绕渗较为严重;大坝坝体浸润线较高,上游防渗面板裂缝造成高水位坝体出现射流,廊道内积水较多,大坝综合防渗排水体系设施不完善。坝址区全断面渗流量过大,尤其以左岸单薄分水岭渗漏较为严重,大坝存在严重的坝基渗漏与绕坝渗流问题,应予以处理。The geological conditions of a certain reservoir area and dam site are complex,with multiple penetrating faults.In order to analyze the seepage situation in the reservoir area and the dam body,the finite element method was used to conduct three-dimensional numerical simulation of the seepage field in the dam and reservoir area.Based on the actual operating conditions,parameter inversion was conducted,and the anti-seepage safety of the dam was analyzed and evaluated based on the distribution of water head and the calculation results of seepage flow.The results indicate that the change of permeability coefficient of faults in the reservoir area has the most significant impact on the seepage flow rate of the left bank and dam section,and the left bank seepage is more severe.The seepage line of the dam body is relatively high,and there are cracks in the upstream anti-seepage panel,causing jet flow in the high water level dam body.There is a lot of accumulated water in the corridor,and the comprehensive anti-seepage and drainage system facilities of the dam are not perfect.The overall seepage flow in the dam site area is too large,especially in the thin watershed on the left bank,where leakage is more severe.There are serious problems with dam foundation leakage and seepage around the dam,and it should be treated.

关 键 词：断层影响 库区渗漏 三维渗流 有限元法 混凝土坝 

分 类 号：TV213.4[水利工程—水文学及水资源]