楔形砌块溢道上的水流分析

Analysis Of Flow On Spillways Built By Wedge Stones

世界各国的试验数据、研究成果和原型测试已明确表明，混凝土楔形砌块是一种理想的土坝溢洪道、堆石坝溢洪道或过水围堰等的保护材料。混凝土楔形块不仅便于制作安装，而且经济、安全、可靠。作者首先提出使用出口突然放大能量损失的理论对作用在楔形块溢洪道上的沿程阻力进行分析，推导出准均匀流状态下的无量纲的Ｃｈｅｚｙ系数Ｃ０、水流深度ｈ０和水流流速Ｖ的求解方式。计算成果与模型、原型试验成果进行了对比，证明了公式的实用性。

A lot of data from tests and prototype observers as well as research results aroand the world have supported the conclusion that concrete wedges are ideal protection materials for spillways of earth and masonry dams,and flowover weirs. Concrete wedges are not only easy to manufacture and install. but also economic, safe and reliable. The resistance to forward movement,which acts on spillway built by wedges,is analyled using the theory that energy loss resulting from suddenly enlarging of outlet by the writer for the first time. The formulae for non-dimensional Chezy coefficient Co, water depth h0, and flow velocity under sub-even flow condition were derived. The results of calculating by the formulae were compared with the data of modle and prototype tests,the result proves they are practical.