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看过本刊85年10期蒋玉球同志关于《尾水闸门槽改进的探讨》一文后,笔者有几点不同看法,谨提出供讨论。的确,向上游倾斜的闸门槽较之垂直门槽来说有其优点,一是侧止水效果要好,二是闸门上的止水橡皮几乎没有什么磨损。但是,笔者认为,侧门槽也会带来不利之处,因为在尾水管出口处沿整个尾水闸底板均做成倒坡,则必然影响尾水出流的扩散,增加尾水段的水头损失(尽管损失很小)。另外,倒坡处的表层混凝土较平底板来说,受尾水的冲刷更严重。时间久了会使得倒坡表面不平整,不能很好的与闸门底部相吻合,同样对止水不利。笔者认为,欲避免上述缺点,可采用如图所示的办法,即将闸槽底坎部分以及闸底板上的倒坡去掉,采用向上游倾斜的闸门槽与平闸底板相结合,而把尾水闸门的侧剖面做成梯形,当闸门关闭时,
After reading the article entitled “Discussion on the Improvement of Tailrace Sluices” commented by Comrade Jiang Yuqiu in 1985, how many different opinions do I have, I would like to propose for discussion. Indeed, the tilt of the upper gate slot than the vertical slot has its advantages, one side of the water stop effect is better, and second, there is almost no water on the gate rubber wear. However, in my opinion, side-door troughs may also bring disadvantages because at the exit of the draft tube all the tail gates are made to be down-sloped, which inevitably affects the diffusion of the tail water flow and increases the head loss at the tail water section Despite the small loss). In addition, the down-slope of the concrete surface than the flat floor, washed by the tail water more serious. A long time will make the slope surface is not smooth, not well with the bottom of the gate match, the same unfavorable water stop. The author believes that to avoid the above shortcomings, the method shown in the figure can be adopted, that is, the bottom part of the sluice gate and the slanting slope on the sluice floor are removed, and the sluice gate sloping towards the upper reaches is combined with the slab floor, Gate side profile made of trapezoidal, when the gate closed,