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针对黑石罗水库现状连续式鼻坎消能效果较差,可能威胁河床及岸坡稳定的现状,通过水工模型试验,将挑流消能连续式鼻坎优化为斜鼻坎,即将鼻坎挑射角度由定值调整为渐次增大,同时偏转大角度挑射一侧反弧段边墙至泄槽轴线位置,去除小角度挑射一侧边墙及部分反弧段底板,迫使出坎水舌在平面上转向的同时沿竖向大幅拉开,在保证出射水流平顺归入河床的同时,增大挑射水流和空气的接触面积,最大限度消除水体能量,从而降低水股对落点的冲刷,达到保护河岸及相邻建筑物安全的目的。试验结果表明,斜鼻坎可以很好地适应狭窄地形条件,有效降低挑射水流对鼻坎下游的冲刷。研究成果为类似工程提供了参考。
According to the current situation of Blackstone Reservoir, the continuous nasal ridge energy dissipation is poor, which may threaten the stability of riverbed and bank slope. Through the hydraulic model test, The angle of shooting is adjusted by the setting value to gradually increase, while deflecting the side of the anti-arc section at the large-angle pick side to the axis of the drain slot, removing the side wall with the small angle and partially inverting the arc floor to force the water to flow out While the tongue is turned on the plane, the tongue is greatly opened along the vertical direction. While ensuring that the outgoing water flow smoothly falls into the riverbed, the contact area between the jetted water and the air is increased, the energy of the water body is maximally eliminated, Scouring, to protect the safety of the river bank and adjacent buildings. The experimental results show that oblique nose ridge can be well adapted to the narrow terrain conditions, effectively reducing the jet of water on the downstream of the nose ridge erosion. The research results provide a reference for similar projects.