新疆某水利枢纽上游围堰渗流数值模拟

通过利用岩土工程仿真计算分析软件GeoStudi02007，对新疆某水利枢纽上游围堰工程进行二维平面渗流分析计算。计算结果表明：当防渗墙深度由17m增加至20m时，围堰渗流量相应减小2．28％；当防渗墙深度由20m增加至25m时，围堰渗流量相应减小4．64％，增加防渗墙深度，对减小围堰渗流量的作用不大；当防渗墙深度为17m时，围堰总渗流量2．836m3／s。围堰下游出逸点附近比降在0．115～0．142范围内。分析计算成果可为围堰的防渗结构优化设计提供参考。

Numerical Simulation of the Upstream Cofferdam Seepage of a Water Conservancy Projects in Xinjiang

The upstream cofferdam two-dimensional planar seepage of a water conservancy project in Xinjiang is calculated and analyzed by using the geotechnical engineering simulation analysis software GeoStudio2007. The calculation results show that cofferdam seepage discharge is reduced by 2.28% when the depth of diaphragm wall increases from 17 to 20 meters. When the depth of diaphragm wall increases from 20 to 25 meters,cofferdam seepage discharge is reduced by 4.64%,the effect is not obvious that by means of increasing the depth of diaphragm wall to reduce the cofferdam seepage discharge. When the depth of diaphragm wall is 17 meters,the total seepage discharge of the cofferdam is 2.836 m3/s. Exit gradient of the cofferdam downstream is in the range of 0.115 ~ 0.142. It can provide a reference for cofferdam seepage- prevention structure optimization design.