金王寺水库共用消力池水工模型试验

Model Tests of Shared Stilling Pool of Jinwang Temple Reservoir

针对金王寺水库共用消力池原方案中进口的中隔墙长度偏短,导致泄洪洞出流受溢洪道水跃影响,出口存在回水拍打洞顶的现象,根据模型试验提出延长中隔墙和泄洪洞出口段的措施,以减小二者出口流态的相互干扰,消除水跃回水拍打洞顶的威胁。结果表明,该措施有效可行,说明共用消力池水力设计重点是要处理好进口汇流处水流的相互影响,联合泄洪时应尽量使消力池内主流处于中轴线上,以充分发挥消力池的消能作用。

In the original proposal,the length of intermediate wall in stilling pool exit of Jinwang temple reservoir is short.So,it appears that the hydraulic jump of spillway affects outflow of flood discharging tunnel and backwater pats the top of tunnel in the outlet.According to model test results,it suggests that stretching intermediate wall and outlet section of tunnel adopted to reduce disturbance of outflow and eliminate the threat by backwater.The study results show that the measure is effective and feasible and it is important to deal with interference with water flow in hydraulic design of shared stilling pool.It fully plays the role of energy dissipation by letting main stream in the central axis of stilling pool when flood discharging together.