宽尾墩体型对高拱坝表孔最大水深的影响  

Impact of Flaring Gate Piers on Maximum Water Depth of Surface Spillway in High Arch Dam

作　　者：周磊[1] ZHOU Lei(Yangling Vocational and Technical College, Yangling 712100, China)

机构地区：[1]杨凌职业技术学院

出　　处：《水电能源科学》2019年第8期54-57,共4页Water Resources and Power

摘　　要：宽尾墩应用于高拱坝表孔后会增大流道水深,从而一定程度上增大工程量,同时过高的边墙也会增大结构设计难度。为探究表孔最大水深与宽尾墩体型之间的关系,采用数值计算的方法,分析宽尾墩收缩比、收缩率、堰面俯角等体型参数对高拱坝表孔最大水深的影响。结果表明,表孔最大水深随着收缩比的增大而显著减小,而收缩率的影响则相对较小;得出了表孔流道最大水深与宽尾墩体型参数之间的定量计算式,并提出了一个综合影响系数k来判别急流冲击波交汇点位置,可为表孔宽尾墩的结构设计提供参考。Using of flaring gate piers in surface spillway of a high arch dam would increase the water depth of flow channel, which would increase the engineering quantity to a certain extent. Meanwhile, higher side wall would increase the difficulty of structural design. To explore the relationship between maximum water depth of flow channel and the flaring gate piers shape, the method of numerical calculation was used to analyze the impact on maximum water depth with different shape parameters, such as shrinkage ratio, shrinkage rate, and plunge angle. The results show that the maximum water depth markedly decreases with the increase of shrinkage ratio, while the impact of shrinkage rate is relatively small. The quantitative calculation formula between the maximum water depth and shape parameter of flaring gate piers of the surface spillway is obtained, and a comprehensive influencing coefficient k is proposed to distinguish the position of meeting-point of rapid flow shock wave, which provides a reference for the structural design of flaring gate piers in surface spillway of a high arch dam.

关 键 词：高拱坝表孔 宽尾墩 收缩率 收缩比 最大水深 数值模拟 

分 类 号：TV135.2[水利工程—水力学及河流动力学]