青峪口水库坝轴线布置水力学数值计算研究

Study on Hydraulic Numerical Calculation of Dam Axis Arrangement in Qingyukou Reservoir

青峪口水库工程坝址位于弯道河段,工程泄洪规模比较大;在弯道河段坝址上,合理的布置坝轴线可较好地改善泄水建筑物的水力条件。为了研究不同坝轴线布置方案的水力条件,该文采用三维数值模拟计算方法,对不同坝轴线布置方案下,泄洪建筑物的水力学特性及下游河道水流流态分别进行了模拟研究,对比分析了两个方案的溢流表孔进流影响,消力池池内流态、流速、水面线以及下游河道右岸沿程流速分布。结果显示,推荐方案的坝轴线布置水力条件更好,解决了青峪口水库工程在坝轴线选择上的难题,研究成果可为国内外类似工程提供参考。

The dam site of Qingyukou Reservoir Project is located in the curved river section,with a relatively large flood discharge scale;Reasonable arrangement of dam axis on the dam site of curved river sections will greatly improve the hydraulic conditions of the discharge structures;In order to study the hydraulic conditions of different dam axis layout schemes,a three-dimensional numerical simulation calculation method was used to simulate the hydraulic characteristics of flood discharge structures and downstream river flow state under different dam axis layout schemes,The impact of the two schemes on the inflow of overflow surface holes,the flow state,velocity,water surface profile in the stilling basin,and the velocity distribution along the right bank of the downstream channel were compared and analyzed;According to the comprehensive analysis results,the recommended dam axis layout has better hydraulic conditions.The three-dimensional numerical simulation analysis method solves the difficulty in selecting the dam axis for the Qingyukou Reservoir Project,and provides a reference basis for similar projects at home and abroad.