惠州抽水蓄能电站水库渗漏条件分析

在对惠州抽水蓄能电站库区工程地质条件进行详细调查的基础上,采用现场试坑注水和钻孔注水、压水试验等方法了解岩土体的透水性。分析表明上下、水库均存在库水外渗条件,且上水库渗漏问题比较突出。库水外渗主要沿通往库外的断裂构造与强风化带连通形成的渗漏通道渗漏。建议采取截渗墙结合帷幕灌浆作垂直防渗体为主的防渗措施,同时充分利用坡积土和全风化带作为水平防渗铺盖以减少防渗处理工作量。

Leakage condition analysis for reservoir of Huizhou Pumped Storage Power Station

Based on a thorough investigation of the engineering geological condition for the reservoir region of the Huizhou Pumped Storage Power Station,the in-situ trial pit water injection test,boring water injection test, and water pressure test were performed to study the permeability of rock and soil mass.The result shows that the leakage from the upper and lower reservoirs might occur,and that water leakage from the upper reservoir is more serious.Water leakage from the reservoirs mainly follows the passage,which is formed by connection of the fracture structure outward extending with the strongly weathered zone.It is suggested that the impervious wall combined with curtain grouting should be taken as the main vertical impervious body for seepage control,and that the full use of slope wash and fully weathered zone as horizontal impervious blanket should be taken to reduce work load for seepage control.