汉江某航电枢纽汛期导截流工程数值仿真与实践  

Numerical simulation and practice of river diversion and closure project of navigation and electricity junction in the Han River during flood season

作　　者：肖苡辀 罗伟 冯先导 林红星[1,2] XIAO Yi-zhou;LUO Wei;FENG Xian-dao;LIN Hong-xing(CCCC Second Harbor Engineering Company Ltd.,Key Laboratory of Large-span Bridge Construction Technology,Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan 430040,China;CCCC Highway Bridge National Engineering Research Centre Co.,Ltd.,Beijing100088,China)

机构地区：[1]中交第二航务工程局有限公司,长大桥梁建设施工技术交通行业重点实验室,交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040 [2]中交公路长大桥建设工程研究中心有限公司,北京100088

出　　处：《水运工程》2022年第12期204-209,244,共7页Port & Waterway Engineering

基　　金：中国博士后科学基金第61批面上资助项目(2017M612541)。

摘　　要：针对汉江某航电枢纽土石围堰汛期导截流的问题,采用数值模拟方法对工程方案进行优化,研究戗堤进占过程的水力特性以及截流对岸坡的冲刷影响,合理确定水下抛石料粒径。结果表明:1)通过对比实测数据,验证了该数值模拟方法的可靠性。2)成功预测了一期围堰挡水能力,预测水位精度高达0.5 m。3)二期上游围堰采用双向立堵法,减少了截流对岸坡的冲刷。同时预测的龙口流速及抛石粒径能够满足施工要求,为施工组织设计提供了科学依据。研究成果已成功运用于该项目实际施工中,并保证了该工程汛期一次实现成功截流。Aiming at the problem of the river diversion and closure project of soil-rock cofferdam at a navigation and electricity junction in the Han River during flood season,the numerical simulation method is adopted to optimize the scheme,study the hydraulic characteristics of the berm advancing process and the impact of the closure on the bank slope,and reasonably determine the particle size of underwater riprap.The results show that:1)The reliability of the numerical simulation method is verified by comparing the measured data.2)The water retaining capacity of the first stage cofferdam is predicted successfully,and the prediction accuracy of the water level is as high as 0.5 m.3)The bidirectional vertical blocking method is adopted for the second stage upstream cofferdam,which reduces the scouring of bank slope by the closure.At the same time,the predicted flow velocity and the particle size of riprap can meet the construction requirements of the site,which provides a scientific basis for the construction organization design.The above conclusions have been successfully applied to the actual construction of the project and ensured a successful closure of the project during flood season.

关 键 词：土石围堰 导截流工程 数值仿真 方案优化 

分 类 号：U615[交通运输工程—船舶及航道工程]