文登抽水蓄能电站地下洞室群复杂渗流场的数值模拟分析

文登抽水蓄能电站由引水系统、地下厂房系统和尾水系统以及上下库组成。复杂地下厂房洞室群、上下库大坝防渗系统以及压力管道上方的平洞和密集排水孔幕构成了文登抽水蓄能电站复杂的防渗排水系统。采用GWSS（Ground water Simulation System）软件对文登抽水蓄能电站工程区复杂的渗流场进行了数值模拟分析,重点研究了抽水蓄能电站正常运行后工程区复杂渗流场特性、引水系统管道的外水压力和上水库防渗效果。研究结果表明：在高压隧洞下水平段上部设置排水洞和排水孔幕的排渗方案,对引水管道和岔管具有显著排水降压作用,使该区域的渗控效果满足要求。

Numerical Simulation on the Complex Seepage Field of Underground Caverns of WendengPumped Storage Power Station

Wendeng pumped-storage power station is composed of water intake system, underground powerhouse system, tailrace system and the upper and lower reservoir. The underground chambers, seepage control system of the upper and lower dam, and the adits and densely distributed drainage holes above the penstock construct the complex impervious system of the station. GWSS(Groundwater Simulation System) software was adopted in the numerical simulation analysis on the complex seepage field of the project. Characteristics of the complex seepage field, the external water pressure of conduit pipe and the impervious effect of the upper dam during normal operation were investigated. The result shows that the pressure on the conduit pipe and branch pipe can be reduced obviously and hence the seepage control effect meets the requirement by setting plughole and drainage curtain at the top of the horizontal segment of the high-pressure tunnel.