某溢流坝下游泄洪消能防冲布置优化研究  

Research on Optimal Arrangement of Flood Dissipation and Energy Dissipation and Scour Prevention Downstream of an Overflow Dam

作　　者：郭红民[1] 杨莹 伍学文 张杨 柳滔 许宏鋆 王晓军 GUO Hong-min;YANG Ying;WU Xue-wen;ZHANG Yang;LIU Tao;XU Hong-yun;WANG Xiao-jun(College of Hydraulic and Environmental Engineering,China Three Gorges University,Yichang 443002,China;Yangtze River Water Resources and Hydropower Development Group(Hubei)Co.,Ltd.,Yangtze River Engineering Survey and Design Company,Wuhan 430000,China;Yalong River Basin Hydropower Development Co.,Ltd.,Chengdu 610051,China;Guangxi Youjiang Water Conservancy Development Co.,Ltd.,Nanning 530000,China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]长江水利水电开发集团(湖北)有限公司长江工程勘测设计公司,湖北武汉430000 [3]雅砻江流域水电开发有限公司,四川成都610051 [4]广西右江水利开发有限责任公司,广西南宁530000

出　　处：《水电能源科学》2021年第3期54-57,共4页Water Resources and Power

摘　　要：为优化分析某溢流坝泄洪消能防冲布置形式,运用数值模拟的方法,建立溢流坝挑流消能及下游防冲的三维数值模型,根据工程特点,在前期物理模型试验成果的基础上,拟定多种下游消能防冲优化布置方案并进行数值模拟计算。计算结果表明,将原方案水垫塘预挖冲坑的下游斜坡改为垂直挡墙结构形式,能有效改善下游水流流态,降低预挖坑后的流速大小、均化流速分布,降低护坦处的压强,提高消力塘的消能效果,可减小对护坦及下游河床、岸坡的冲刷影响,可为类似工程设计提供参考。In order to optimize the layout of flood discharge,energy dissipation and scour prevention of an overflow dam,a numerical simulation method was used to establish a three-dimensional numerical model of the overflow dam's energy dissipation and downstream scour prevention.According to the engineering characteristics,a variety of optimized layout schemes for downstream energy dissipation and scour prevention were drawn up and numerical simulation calculations were carried out based on the preliminary physical model test results.The calculation results show that changing the downstream slope of the pre-excavated scouring pit of the original plan for the plunge pool into a vertical retaining wall structure can effectively improve the downstream flow regime,reduce the flow rate after the pre-excavation,homogenize the flow velocity distribution,reduce the pressure at the apron,improve the energy dissipation effect of the stilling pond,and reduce the erosion impact on the apron and downstream riverbeds and bank slopes.Thus,it can provide reference for similar engineering design.

关 键 词：溢流坝 泄洪消能 优化 数值模拟 防冲布置 

分 类 号：TV135[水利工程—水力学及河流动力学]