宜兴抽水蓄能电站沥青混凝土面板坝稳定和变形分析

江苏宜兴抽水蓄能电站枢纽工程上水库主坝为沥青混凝土面板堆石坝，坝址区地形地质条件复杂，下游面最大高差达285m，呈覆盖于建基面上的贴坡体形状．对此坝体选取代表性断面进行稳定分析，采用三维非线性有限元进行变形计算．计算显示，该坝坡的抗滑稳定安全系数满足规范要求，坝体内变形和应力水平均不大，不会发生剪切破坏．

Stability and deformation analysis of asphalt concrete faced rockfill dam at Yixing Pumped Storage Power Station

The main dam of the upper reservoir of the Yixing Pumped Storage Power Station is an asphalt concrete faced rockfill dam. The maximal height difference of the downstream face is 285 m due to the unfavorable topography and geological condition at the dam site, which results in a long rockfill mass covering the foundation surface. Some research work on the stability and deformation of the asphalt concrete faced rockfill dam was introduced, including the dam section design, the zoning for rockfill materials, the selection of representative sections for stability analysis, and the adoption of 3-D nonlinear FEM for deformation calculation. The calculated result shows that the anti-sliding stability coefficient of the dam slope meets the requirement of the design code, and that the internal deformation and stress of the dam body are small, which will not lead to the shear failure.