摘要
建于狭窄河谷的拱坝一般采用表孔溢流,溢流堰包括圆心点上游头部曲线、堰面曲线及反弧曲线三部分。设计参数有定型水头Hs、反弧半径R、反弧角1θ、挑角2θ等。结合已投入运行的几个工程实例对这些参数的设计取值进行研究,将理论计算结果与运行实测结果进行了比较,探讨了各参数的取值范围,对挑流公式、跌流公式的适用条件进行了初步分析。
For flood discharge, arch dams in narrow valleys are usually designed to be with surface spillways which are composed with the head section, the overflow surface and bucket. The type of spillway is fixed on parameters such as design head （Hs）, the radius （R）/angle （θ1） of bucket and jet-trajectory angle （θ2）, etc. Based on the analyses of design values of those parameters and comparison with computed and observed data of several existing arch dams, the range of former parameters and applicable conditions of Flow Jumping Formula and Flow Falling Formula are analyzed in this paper.
出处
《水力发电》
北大核心
2008年第5期26-28,共3页
Water Power
关键词
定型设计水头
反弧半径
挑角
向心集中
扩散
shape design head
radius of bucket
jet-trajectory angle
centripetal concentration
diffusion
