北引渠首扩建工程引水防沙的试验研究  

Experiment Study on Water Diversion and Sediment Control of North Canal Expansion Project

作　　者：胡海华[1] 吉祖稳[1] 董占地[1] 王党伟[1] 

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100048

出　　处：《浙江水利科技》2014年第5期61-64,86,共5页Zhejiang Hydrotechnics

基　　金：国家科技支撑计划专题(2012BAB02B01);流域水循环模拟与调控国家重点实验室自主研究课题(2014ZY05)

摘　　要：通过实体模型试验研究分析了取水枢纽修建前后江道的河床演变趋势,优化比较了取水枢纽及泄洪闸的不同布置方式,运用理论分析和试验2个方法研究了泄洪闸闸下极限冲刷能力及其消能防护措施,同时验证了取水枢纽修建后引水渠道的引水能力并提出了相应的防沙措施。试验结果表明,取水枢纽泄洪闸的布置是合理的,对江道水流特性及床面冲淤变化的影响较小;设计引水闸的引水量可以达到149m3/s,能满足相应的设计要求。建议适当增加泄洪闸消力池和海漫的设计尺寸以满足实际需要;提出了采用泄洪闸拉沙可以降低鱼嘴附近的床面高程,从而有利于减少粗颗粒泥沙进入引水渠道的防沙措施。This paper mainly analyzes the evolution trend of river bed before and after the construction of water intake project, and optimizes the layout of water intake project and sluice by comparing the difference through physical model experiment study. Meanwhile, it examines the limit scour ability and protective measures for energy dissipation of sluice by using theoretical analysis and experimental research, and verifies the diversion capacity of the channel after the construction of water intake project and put forward the corresponding sediment control measures. The experiment results show that the layout of water intake project and sluice is reasonable, and it is less affected the flow characteristics of the river channel and changes in scouring and silting of the bed surface; it is met the requirements of the design that the amount of water for design sluice can reach 149 m^3/s; it is recommended to appropriately increase the design size of stiller and apron for the actual needs; the measure of sediment control is proposed that scouring sediment by using sluice can reduce the bed surface elevation near Fish Mouth in order to reduce the coarse sediment into the diversion channel. This research provides the scientific basis and technical support for the optimization design of North Canal expansion project.

关 键 词：取水枢纽 河床演变 极限冲刷 引水防沙 

分 类 号：TV149[水利工程—水力学及河流动力学]