宽尾墩体型对高拱坝表孔最大压力的影响  

Impact of Flaring Gate Piers with Different Shape Parameters on the Maximum Pressure of Surface Spillway in a 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6期71-74,共4页Water Resources and Power

摘　　要：宽尾墩应用于高拱坝表孔后会增大壁面压力,在一定程度上增加了结构设计难度,为探究表孔壁面最大压力与宽尾墩体型之间的关系,采用数值计算方法研究了宽尾墩收缩比、收缩率等体型参数对高拱坝表孔流道中心线及侧墙最大压力的影响。结果表明,堰面中线与侧墙最大压力均随收缩率的增大而增大,随收缩比的增大而减小;并推出表孔流道中线及侧墙最大压力与收缩率、收缩比之间的定量计算公式,从而为表孔宽尾墩的结构设计提供参考。Application of flaring gate piers in surface spillway of a high arch dam would increase the pressure on the wall,which increases the difficulty of structural design to a certain extent.To explore the relationship between the maximum pressure on the wall and the flaring gate piers shape,the method of numerical calculation was used to research the influence on the maximum pressure on centerline of the flow channel and sidewall with different shape parameters,such as shrinkage ratio,shrinkage rate.The results show that the maximum pressure of the middle line weir and side wall increases with the increase of shrinkage ratio and decreases with the increase of shrinkage ratio.The quantitative calculation formula between the maximum pressure,shrinkage rate and shrinkage ratio of the middle line of the flow channel and the sidewall of the surface spillway is obtained,which provides a reference for the structural design of flaring gate piers in surface spillway of high arch dam.

关 键 词：高拱坝表孔 宽尾墩 收缩率 收缩比 最大压力 数值模拟 

分 类 号：TV135.2[水利工程—水力学及河流动力学]