台阶式泄槽溢洪道的水力特性和设计应用

Hydraulic Characteristics and Design Application of Stepped Chute Spillways

台阶式泄槽溢洪道的显著特点是沿溢流面的消能率大大提高，从而可免除或极大地缩短溢洪道末尾所需消能工的尺寸。台阶水道还可用于水处理工厂，促进空气中的气－水交换和有机质的挥发。参阅国内外资料的基础上，本文对台阶溢洪道的发展现状、流态和水力特性，以及台阶溢洪道的设计应用做了介绍。

Visible characteristic of stepped chute spillways is significant increment of the rate of energy dissipation taking place along the spillway face and elimination or reducing greatly the need for a large energy dissipator at the toe of the spillway. Stepped cascades are used also in water treatment plants to enhance the air water transfer of atmospheric gases and volatile organic components. Based on references of informations domestic and abroad, some problems, such as the state of development of stepped spillways, the flow patterns and characteristics, the design application of stepped chute spillways, are introducded in this paper.