回龙抽水蓄能电站上库岩体三维渗流分析

Analysis of Three Dimensional Seepage Flow in Fractured Rock Masses of Huilong Energy Storing-up Station

回龙抽水蓄能电站上库位于花岗岩分布区 ,发育有数条断层和多组裂隙 ,地表风化作用较强 ,岩体渗透性变化较大。在工程设计中考虑混凝土铺盖和帷幕灌浆两种防渗措施 ,但沿断层的铺盖宽度和防渗帷幕深度应如何确定以及哪种防渗方式为佳 ,这些都取决于岩体渗流特点和渗漏量变化。为此 ,通过岩体三维渗流计算 ,对库盆区的渗流场和渗漏量变化特征进行了详细分析 。

The rock mass in the up reservoir site of Huilong pumped storage prower station is made of granite with many faults, numerous fractures and strong weathering, which makes the permeability of rock mass more variable in depths and locations. How to determine the widths of the concrete carpets and the depths of the grouting curtains is a key problem for designing the system of anti leakage of the reservoir. Therefore the calculation was done for analyzing the patterns of seepage flow in the rocks under various conditions by using the flow model of double fracture system and the main conclusions are introduced in this paper. The implications of the results on the design of the station are highlighted.