南水北调与水利科技（中英文）2023，Vol.21Issue(6)：1194-1203,10.DOI:10.13476/j.cnki.nsbdqk.2023.0118
大型输水渠跨渠桥梁墩柱导流罩及现场试验研究
Study on flow-deflector of cross bridge pier and field test in large transmission channel
摘要
Abstract
In order to solve the engineering problem that the high water level in the intensive section of the cross-channel bridge affected the water transport capacity of the project during the period when the operating flow of the Middle Route of the South-to-North Water Transfers Project exceeded the maximum designed flow for the first time in 2020,the 13.233 km section from Shuangji River inverted siphon to Mei River inverted siphon was selected as the test section,and five typical bridges of the test section were selected as the test objects.The numerical simulation and prototype observation test research methods were used to design and study the application effect of the bridge pier guide dome. The basic type of the guide dome was designed according to the hydraulic theory.The 3D hydrodynamic model parameters were calibrated using the prototype observation data of the unguided dome.Meanwhile,the schemes of different guide dome sizes were further compared and selected by numerical simulation,and the optimal scheme was obtained.Through the prototype test,the optimization of the flow pattern and the improvement of the water transport capacity of the test section of five bridges after installation of the guide domes were analyzed and verified. The results showed that after the installation of the guide dome,the flow pattern near the pier of the five bridges was obviously improved,the head loss of the test section was reduced by around 64.4%,the comprehensive roughness was reduced by around 8.0%,and the flow capacity of the test section was increased by around 8.71%,which further verified the reliability of the numerical simulation. The method of bridge pier guide dome design and prototype observation can also be effectively applied to other similar long-distance open channel water transmission projects.关键词
输水渠道/流态优化/导流罩/原型观测Key words
water transmission channel/low pattern optimization/guide dome/prototype observation test research method分类
建筑与水利引用本文复制引用
胡靖宇,樊梦洒,冀荣贤,左丽,崔金良,娄利芳,刘明潇..大型输水渠跨渠桥梁墩柱导流罩及现场试验研究[J].南水北调与水利科技（中英文）,2023,21(6):1194-1203,10.基金项目
水利部国际合作与科技司、水利部科技推广中心水利技术示范项目(先进实用技术示范类)(SF-202118) （先进实用技术示范类）
