变坡比衔接段结构阶梯溢洪道水力特性研究  

Hydraulic Characteristics of Structural Stepped Spillway in Variable Slope Ratio Connection Section

作　　者：付旭辉[1,2] 罗媛媛 刘志庆 FU Xuhui;LUO Yuanyuan;LIU Zhiqing(Hehai College,Chongqing Jiaotong University,Chongqing 400074,China;National Research Center for Inland Waterway Improvement Engineering Technology,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]重庆交通大学国家内河航道整治工程技术研究中心,重庆400074

出　　处：《广东水利水电》2023年第10期1-5,共5页Guangdong Water Resources and Hydropower

基　　金：重庆市技术创新与应用示范专项重点研发项目(编号:cstc2018jszx-zdyfxmX0021-05);重庆市教育委员会“成渝地区双城经济圈建设”科技创新项目(编号:KJCXZD2020030);鱼类生境修复方案研究及生态效应评估(编号:HT20211200041)。

摘　　要：该文依托庙堂水库溢洪道工程,采用数值模拟的方法对比了传统曲线型衔接段阶梯溢洪道与变坡比衔接段结构阶梯溢洪道的水力特性,结果表明:变坡比衔接段结构能够有效降低阶梯消能结构的流速,最大降低40%,校核工况下使得消力池进口流速降低47%,能有效缩短消力池的长度,节省工程造价;变坡比衔接段结构溢洪道负压幅值降低38%,降低了阶梯结构发生空化破坏的几率,同时阶梯溢洪道的消能率提高10%,更有利于溢洪道的消能。变坡比衔接段结构阶梯溢洪道的适用性更强,更有利于溢洪道的安全运行,可为类似工程提供参考。Relying on the Miaotang Reservoir spillway project,this paper uses the numerical simulation method to compare the hydraulic characteristics of the traditional curved connecting section stepped spillway and the variable slope ratio connecting section structure stepped spillway.The results show that the variable slope ratio connecting section structure can effectively reduce the stepped energy dissipation structure.The maximum flow rate of the stilling tank is reduced by 40%.Under the check condition,the inlet flow rate of the stilling pool is reduced by 47%,which can effectively shorten the length of the stilling pool and save the project cost;the negative pressure amplitude of the structural spillway in the connection section of the variable slope ratio is reduced by 38%,which reduces the probability of cavitation damage to the stepped structure,and at the same time increases the energy dissipation rate of the stepped spillway by 10%,which is more conducive to the energy dissipation of the spillway.The variable slope is more applicable than the stepped spillway in the connecting section,which is more conducive to the safe operation of the spillway,and can provide a reference for similar projects.

关 键 词：阶梯溢洪道 曲线型衔接段结构 变坡比衔接段结构 流速分布 消能率 

分 类 号：TV651.1[水利工程—水利水电工程]