中小型拱坝表孔大流量泄洪消能建筑物体形研究  

Shape Study on Large-discharge Flood-releasing Energy Dissipator for Crest Spillway of Medium and Small-sized Arch Dam

作　　者：尹进步[1] 梁宗祥[1] 陈卫平[2] 龚红林[1] 

机构地区：[1]西北农林科技大学,陕西杨凌712100 [2]贵州遵义水利水电勘测设计研究院,贵州遵义563002

出　　处：《水力发电》2009年第6期28-31,共4页Water Power

摘　　要：依据圆满贯工程水工水力学模型试验资料,对中小型拱坝表孔大流量泄洪建筑物体形问题进行研究,提出了一种复合消能工体形与设计思路,即采用宽尾墩窄缝纵向水舌与连续鼻坎横向扩散的综合形式,可使水舌在纵向与横向实现全范围的扩散,充分利用消能空间与水体,既适应了不同流量洪水泄洪的要求,又使消能率得到大幅度提高,大流量泄洪冲坑深度可减小28%。Base on the experimental study on hydraulics model of Yuanmanguan hydropower station, this paper researches the shape of large-discharge flood-releasing energy dissipator for crest spillway of medium- ＆ small-sized arch dam and puts forward a shape and design concept of a compound energy dissipator, that is, adopting the comprehensive type of the longitudinal nappe of flaring gate pier and transverse spread of continuous bucket lip which can make water nappe to spread in whole range in the longitudinal and transverse directions so as to reach full energy dissipation. It could meet the needs of flood releasing with different discharges but also can greatly enhance the energy dissipation ratio and reduce the depth of scouring pit up to 28%.

关 键 词：中小型拱坝 表孔 消能 冲坑深度 

分 类 号：TV135.2[水利工程—水力学及河流动力学]