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本文为在对水库溢洪道泄流孔口胸墙底缘型式的试验研究和若干具体工程实践的基础上写成.试验证明,带有直角胸墙的泄流孔口加设流线型导流板后,在上游水位较高时能提高泄洪能力30%,甚至更大一些.这对提高水库溢洪道泄洪保坝能力和当前对水库工程普遍进行检查复核工作,具有实际意义.本文建议采用横椭圆型的导流板,给出几种型式不同的导流板的孔流流量系数实验公式.文中还探讨了驼峰堰的过流特性,并提出驼峰型低堰的堰流系数公式.
This paper is written on the basis of experimental study and some specific engineering practices on the bottom of chest wall of discharge spillway of the reservoir.It is proved by experiment that if the discharge port with right angle chest wall is provided with streamline deflector, The higher the flood discharge capacity can be increased by 30% or more, which is of practical significance to improve the reservoir spillway flood damming capacity and the current general inspection and verification of reservoir engineering.This paper proposes the use of horizontal oval baffles, The experimental formulas of the hole flow coefficient of different types of baffles are given.The overcurrent characteristics of the hump weirs are also discussed and the weir flow coefficient formula of the hump type low weir is proposed.