迷宫堰在鞍子河水库工程中的应用

Application of labyrinth weir in Anzihe reservoir

迷宫堰是一种无闸控制的泄水建筑物,为获得较长的溢流前沿长度而在平面上将溢流堰做成折线形,具有结构简单、泄流量大、操作方便等特点,主要应用于中小型水库溢洪道,对新建溢洪道的控制建筑物或改造已建水库的溢洪道以增加泄流能力,均有突出的优越性。本文结合鞍子河水库工程中迷宫堰的设计实例,对迷宫堰水流流态、泄流能力、水力设计等进行了初步探讨。通过计算和试验证实了迷宫堰的泄流能力远大于相同水头下宽顶堰和实用堰的泄流能力,在低水头下这种优势表现得更为突出。

The labyrinth weir is a non-gate controlled discharge structure which has a broken-line overflow weir on surface to get longer length of overflow frontier,and has advantages of simple structure,larger discharge and convenient operation,and so on.It’s mainly used in spillway of medium and small reservoirs with advantage of improving the discharge capacity for both newly built spillway and reconstruction one.Based on the design of Anzihe reservoir,the paper preliminary explores the water flow regime,discharge capacity and hydraulic design of the labyrinth weir.The result of calculation and test is the discharge capacity of labyrinth is greater than the broad crest weir and practical weir under the same water head and more superiority under the lower water head.