某水电站围堰三维渗流有限元分析

利用三维有限元软件对该围堰进行了渗流分析，通过分析得到：围堰在下游溢出口处水力坡降较大，容易发生水力破坏；而渗流量主要集中在防渗墙下方的覆盖层中，这主要是悬挂式防渗墙引起的。在实际工程中一定要注意这两点，以确保该围堰的稳定性。

The finite element analysis to 3-FEM seepage of a hydroeletric cofferdam

The cofferdam seepage was analyzed by three‐dimensional finite element software ,and the result show s that the outfall seepage gradient in dow n‐stream of cofferdam is big ,w here hydraulic failure can hap‐pen easily ;however the seepage quantity was concentrated in the covering layer under the diaphgragm wall .That was mainly caused by the suspended diaphgragm wall .These two points in the practical engi‐neering must be paid attention to ,with the purpose to ensure the stability of the cofferdam .