１　前　　言*某抽水蓄能电站上水库主坝建基面较陡，平均坡度１∶１．５６，局部陡于１∶１．０，如图１所示。因此，下游坝体的稳定性将成为该坝型是否可行的关键因素之一。关于堆石体与基岩面间抗剪强度的研究，国外很少开展，国内也仅在十三陵抽水蓄能电站进行过现场直剪试 1 Introduction * The main dam foundation of a reservoir at a pumped storage power station is steeper with an average gradient of 1: 1.56 and a local steepness of 1: 1.0, as shown in Figure 1. Therefore, the stability of the downstream dam will become one of the key factors that make the dam feasible. Research on shear strength between rockfill body and bedrock surface is rarely carried out in foreign countries. The domestic direct shear test was also conducted only at Shisanling Pumped Storage Power Station