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渗流控制措施是乌东德水电站大坝坝基及地下厂房设计的重要内容。针对乌东德水电站工程区复杂的地质条件和渗控措施,建立坝基及右岸地下厂房区三维模型,采用三维有限元渗流场精细求解技术对渗流场进行计算。成果分析表明,防渗帷幕和排水孔幕组成的渗流控制体系对山体地下水位具有控制作用,厂房侧墙位于地下水面以上;灰岩和厚层白云岩顺层面方向渗透性更强时,渗控措施的防渗排水效果更明显,但排水量显著增大。
Seepage control measures are an important part of the design of dam foundation and underground powerhouse of Wudongde Hydropower Station. In view of the complicated geological conditions and infiltration control measures in the Wudongde Hydropower Station project area, a three-dimensional model of the dam foundation and the underground powerhouse area on the right bank was established. The seepage field was calculated using the three-dimensional finite element seepage field solution technique. The results show that the seepage control system composed of the seepage curtain and the drainage hole curtain has the control effect on the groundwater level of the mountain, the side wall of the plant is above the groundwater level, and when the directional permeability of the limestone and the thick dolostone along the bedding plane is stronger, Seepage prevention and drainage measures more obvious effect, but significantly increased displacement.