各向异性对积石峡面板堆石坝渗流的影响分析

面板堆石坝的坝料在填筑过程中由于碾压等原因而表现出较强的各向异性。采用固定网格有限元全场各向异性渗流分析方法，对积石峡面板堆石坝进行了正常和面板出现裂缝等非常工况条件下的二、三维渗流分析，计算了大坝渗流量和渗流场，探讨了面板裂缝的位置对渗透的影响。计算结果表明，在正常工况条件下，大坝具有良好的渗透稳定性。面板不同的裂缝位置对大坝渗流影响不同。

Influence analysis of anisotropy on seepage behavior of Jishixia concrete-faced rockfill dam

A significant anisotropy is found in the permeability coefficient of the rockfill of a concrete-faced rockfill dam. A 2-D and 3-D fixed-mesh FEM seepage analysis is made on the concrete-faced rockfill dam of the Jishixia Hydropower Project under both normal conditions and abnormal conditions where a crack occurs in the slab. The FEM meshes are obtained according to the designed schemes and topography of the dam. The seepage field and seepage amount of the dam are calculated. The effect of the crack’s location on the seepage is also discussed. The calculation results show that the dam is stable in the seepage aspect under the normal design water level. The position of the crack has a significant effect on the seepage field and seepage amount of the dam.