乌东德水电站坝基及右岸地下厂房区渗控措施研究

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 for dam foundation and underground powerhouse caverns at right bank of Wudongde Hydropower Station

The seepage control measures are the main items for the design of the dam and underground powerhouse caverns of Wudongde Hydropower Station.A refined 3D finite element model is established to simulate the complicated seepage control measures and geological conditions for the dam foundation and the underground hydropower cavern area at the right bank of Wudongde Hydropower Station.The numerical results show that the integrated measures composed of curtains and drainage hole rows will control the water flow from the reservoir and mountain area efficiently.The powerhouse cavern walls will be above the ground water surface.If the permeability is stronger along bedding in thick limestone and dolomite layer,the seepage control system will work more efficiently,but the flux from drainage holes increases obviously.