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1.绪言坝鼻端跳水,目的在于消灭能量,但有时河床坡度过陡,跳水后的下游水位远比下游正常水位高,这时另造副坝在经济上是不合理的。尤其在拱坝上采用自由跳越式溢水方法,由于水流都集中于拱的中心,使水流更加紊乱,此时如用鼻坎,改变射水方向和增长射流距离,就显得非常必要。本文在于探讨鼻坎设计理论,先对变向结构进行理论上的研究,而后用实验数据来校核这种理论,结果十分满意。
1. INTRODUCTION The dams on the nose and end of the dam are designed to eliminate energy, but sometimes the slope of the river bed is too steep and the downstream water level after diving is much higher than the downstream normal water level. In this case, it is economically unreasonable to build another sub-dam. In particular, the use of free-fall over the arch dam overflow method, as the water flow are concentrated in the center of the arch, making the water more disrupted, this time as the nose ridge, changing the direction of the water jet and the growth of distance, it is very necessary. This article is to explore the theory of nose design, the first to change the structure of theoretical research, and then use the experimental data to check the theory, the results are very satisfied.