300m级高土石坝地下厂区渗流场及渗控措施研究

Study on Seepage Field and Seepage Control Measures of Underground Powerhouse Zone for 300m High Earth Rockfill Dam

针对双江口水电站地下厂区的复杂渗流问题,采用三维有限元法和多变量多阶优化法,反演了地下厂区天然渗流场,并对比分析了不同渗控方案下地下厂区的渗流场、渗流量等分布特征。结果表明,地下厂区天然地下水位较高,排水廊道及排水孔幕的排水降压效果显著。

Abstract.. In view of complex seepage of Shuangjiangkou hydropower underground plant, three-dimensional finite element method and multivariate multi-stage optimization method are used to analyze natural seepage field of underground plant. The piant＇s underground seepage field, seepage flow and other distribution characteristics are comparative analysis under the different seepage control schemes. The results show that the natural groundwater level of underground plant is higher, drained-depressurization effect of drainage gallery and drain hole curtain are obvious.