小湾拱坝坝基浅层抗剪稳定复核计算分析

Check analysis of dam base's stability of Xiaowan arch dam

根据小湾水电站拱坝对坝基浅层研究的实际工程要求,采用三维有限元法复核计算分析了坝基浅层抗剪稳定性。研究结果表明:在复核的各单面和包络面中,拱坝坝基最薄弱部位出现在坝底建基面以下2m处;对不同滑出角的同一组复合包络面,其面安全系数随滑出角减小而减小。

Dam base's stability of Xiaowan arch dam has been investigated by using 3-D FEM according to the actual engineering requirements of Xiaowan power station on dam base's shallow research. It is found that the weakest position between pedion and enveloping surfaces locates 2m bellow dam base. Face safety factors of the enveloping surfaces of different slip angles,will decrease with a decrease in slip angle.