挑流鼻坎合理宽度探讨

Discussion on the reasonable width of the flip bucket

挑流消能在消能工中有着广泛的应用,挑流原则要求获得最大的挑距和最小的冲坑。挑流鼻坎的几何尺寸对其起决定性作用,鼻坎挑角、反弧半径可根据规范选取,挑坎顶高程可根据下游最高水位确定,而挑坎宽度没有具体的要求,本文通过假设计算法找出合理的鼻坎宽度,使得挑距最大,冲坑最小。最后还说明了入射水股面积对冲坑的影响。

Flip energy disipation is widely applicated in the project of energy dissipation, to get the maximal jet trajectory length and the minimum scour pit is requested by the principle of flip flow. It is decided by the physical dimension of flip bucket and angle of, the radius of kick arc can be selected according to the standard, and the top altitude of the flip bucket which can be decided by the highest water level in the lower reaches, but its width isn＇t specific request. In this paper, according to the supposititious design procedure, reasonable width of bucket can be provided; it makes the jet trajectory length maximal and the minimum scour pit. Finally, the paper simply explained the influence to the scour pit by the area of stream.