故县水库F_5断层处理效果分析

Analysis of the Effect in Handling the F_5 Fault at Guoxian Reservoir

为确保大坝安全，进一步了解大坝断面变动后坝体、基岩的应力和变位情况以及Ｆ５断层的处理效果，采用ＡＡＡ９０大型三维弹塑性结构分析程序对大坝进行了整体三维非线性有限元分析。分析结果表明，设计对Ｆ５断层采用的“一塞一键三竖井”的处理措施，有效地改善了坝体的受力状况，使应力分布更趋均匀，处理效果已明显接近无断层方案；同时，该种结构型式自身是安全的，满足强度要求。

To ensure the safety of Guoxian dam, to further understand the situations of stress and displacement of the dam and its foundation after the deformation of the dam as well as the effect inhandling the F5 fault. the author performed a three-dimensional non-linear finite element analysisfor the whole d4ps by Using the AAA90 software (which is a large scale three-dimensional program for analyzing elastic structure)' Results indicated that it is safe in handling the FS fault bythe method of 'one plug, one shaft. and three vertical wells'. The strength meets the requirement.