【作者】 曾甄；

【导师】 张志军；

【作者基本信息】 河海大学 ， 水力学及河流动力学， 2004， 硕士

【摘要】 迷宫堰作为一种实用高效的特殊堰型，它在不改变泄水宽度的情况下，可大幅度提高过流能力。因此，迷宫堰特别适用于泄水宽度受限，但又需提高泄流能力的泄水建筑物中。 本文将迷宫堰分为直线型迷宫堰和曲线型迷宫堰。系统讨论了直线型迷宫堰流态特征、过流能力及其影响因素；推导了直线型迷宫堰流量公式，并在前人研究的基础上拟合出综合流量系数的计算公式；讨论了直线型迷宫堰的效率问题。通过物理模型试验，观测了曲线型迷宫堰的流态特征，根据实测资料，分析研究了该堰型的过流能力及其影响过流能力的主要因素，并提出了曲线型迷宫堰的流量计算方法。同时，试验成果表明，曲线型迷宫堰比直线型迷宫堰具有更好的过流效率。此外，本文还在上述研究成果的基础上，提出了较为实用的迷宫式溢洪道水力设计方法，列举了算例，在实际应用中可供参考。更多还原

【Abstract】 The labyrinth weir is a special kind of practical and effective weir patterns. It can evidently increase the discharge for a given outflow width. So the labyrinth weir is particularly suited for use where the discharge structure need to enlarge the ability of outflow but the width is restrictedThe labyrinth weir could be divided into straight-labyrinth weir and curve-labyrinth weir in this paper. As for the straight-labyrinth weir, the flow pattern character, the discharge capacity and its effecting factors are discussed; the flow formula is deduced; a set of discharge coefficient formulas are given basing on the former study; and the efficiency is discussed. Then, a series of physical model experimentations are made to research the flow pattern character and the discharge capacity of curve-labyrinth weir. In this process, the major effect factors of outletcapacity are discussed and a new calculated method of discharge is given. At the same time, the research shows that curve-labyrinth weir precede straight-labyrinth weir in the sight of efficiency. Furthermore, an practical method about the labyrinth-crest spillway hydraulic design is brought out and the design example for reference is presented.更多还原