抽蓄电站粘土心墙坝浸润线及坝坡稳定变化特性  

Variation Characteristics of Phreatic Line and Dam Slope Stability of Clay Core Rockfill Dam for a Pumped Storage Power Station

作　　者：李连胜 郑福杰 谢兴华[1] 卢斌[1] 张宇 谢东谊 LI Lian-sheng;ZHENG Fu-jie;XIE Xing-hua;LU Bin;ZHANG Yu;XIE Dong-yi(Nanjing Hydraulic Research Institute,Nanjing 210029,China;Shuifa Planning and Design Co.,Ltd.,Jinan 250014,China;Yiyuan County Bureau of Natural Resources,Zibo 256100,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]水发规划设计有限公司,山东济南250014 [3]沂源县自然资源局,山东淄博256100

出　　处：《水电能源科学》2024年第11期121-125,共5页Water Resources and Power

基　　金：国家重点研发计划(2023YFB2604703);中央级公益性科研院所基本科研业务费专项资金(Y122002);中央级公益性科研院所基本科研业务费(Y922010);江西省科技+水利项目(2023KSG01003);南京水利科学研究院研究生学位论文基金(Yy124016)。

摘　　要：基于孔隙介质饱和-非饱和渗流理论,将物理模型试验与数值模拟相结合,研究了库水位周期升降时,粘土心墙坝上游坝壳浸润线及坝坡稳定性的变化规律及其影响因素。结果表明,坝体内部的渗流场较库水位变化具有滞后性。上游坝壳渗透系数是影响浸润线位置和坝坡稳定性的主要因素,上游坝壳渗透系数小1个数量级,上游浸润线位置要高2.60~3.00m,约占浸润线变化幅度的30%。水位降落速率、上游坝坡坡度对浸润线位置变化影响较小。此外,上游坝坡的稳定性随着水库水位周期性变化而呈周期性变化。Based on the theory of saturated-unsaturated seepage in porous media,combined with physical model test and numerical simulation,the study investigated the variation patterns of the phreatic line on the upstream dam shell and the stability of the dam slope during the periodic rise and fall of reservoir water levels.The results indicate that the seep-age field inside the dam body lags behind the changes in reservoir water level.The permeability coefficient of the up-stream dam shell is the primary factor influencing the position of the phreatic line and the stability of the dam slope.A decrease in the permeability coefficient of the upstream dam shell by one order of magnitude leads to an increase in the up-stream phreatic line position by 2.6 to 3.0 meters,accounting for approximately 30%of the total change in phreatic line position.The rate of water level decline and the slope of the upstream dam slope have minimal effects on the variation of the phreatic line position.Additionally,the stability of the upstream dam slope exhibits periodic changes in response to the periodic variation of reservoir water levels.

关 键 词：粘土心墙坝 抽蓄电站 库水位变化 浸润线变化 坝坡稳定性 

分 类 号：TV641.25[水利工程—水利水电工程]