【摘要】 针对黄金坪泄洪洞消力池受地形地质条件的限制,消力池长度明显不足、水跃跃首流态较差、消能效果不理想的问题,通过水力学模型试验,调整优化了泄洪洞出口跌坎高度、挑角及坡度体型,并观测了消力池水流流态、水面线、临底流速、底板压强、出口流态和流速等水力特性指标。结果表明,与原设计方案相比,调整体型后的消力池流态得到了很好地控制、消能效果增强,消力池出池水面跌落和流速均有所减小,各项水力学参数指标满足设计要求,通过体型优化实现了在原有消力池长度条件下改善流态和增强消能的目的。更多还原

【Abstract】 Restricted by geography and geological condition,the length of stilling basin of Huangjinping tunnel spillway is obviously inadequate.Flow regime of the head of hydraulic jump and energy dissipation effect are rather bad.Optimized the height,the bucket angle and the slope of the drop sill of the flood discharge tunnel outlet are optimized by the hydraulic model experiments.And then it observes the hydraulic characteristics of flow pattern,water surface line,velocity near the bottom,pressure at the bottom,flow pattern and velocity at outlet.Compared with the original design,the results show that the flow pattern has been controlled very well and the effect of energy dissipation is increased;water drop and velocity of stilling basin at the outlet are reduced;the hydraulic parameters meet the design requirements.Therefore,it reaches the goal of improving the flow pattern and hydraulic characteristics with optimization project form at the condition of keeping the original length of the stilling basin.更多还原