拆除葛洲坝钢板桩纵向围堰对1号船闸通航安全影响  

Influence of demolishing longitudinal cofferdam of steel sheet pilein Gezhouba Dam on navigation safety of ship lock No.1

作　　者：曾辉[1] 刘振嘉 喻峰 袁达 吴俊东 陈小虎 王翔 ZENG Hui;LIU Zhenjia;YU Feng;YUAN Da;WU Jundong;CHEN Xiaohu;WANG Xiang(China Yangtze Power Co.,Ltd.,Yichang 443002,China;Three Gorges Navigation Authority,Yichang 443002,China;Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]中国长江电力股份有限公司,湖北宜昌443002 [2]长江三峡通航管理局,湖北宜昌443002 [3]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《水运工程》2023年第12期124-131,189,共9页Port & Waterway Engineering

摘　　要：葛洲坝下游原钢板桩纵向围堰为临时设施,现已超期服役。通过研究钢板桩围堰对1号船闸通航安全的影响,为钢板桩围堰拆除或重建提供依据。建立葛洲坝下游河道二维水动力模型,对入库流量为1号船闸最大通航流量35000 m^(3)/s时钢板桩围堰拆除和重建工况进行数值模拟计算。结果表明大江、二江分流比小于0.9且越小时,拆除钢板桩围堰对1号船闸下游口门区通航水流条件影响越大。The original steel sheet pile longitudinal cofferdam downstream of Gezhouba is a temporary facility and has now exceeded its service period.This paper studies the impact of steel sheet pile cofferdam on the navigation safety of the ship lock No.1,providing a basis for the demolition or reconstruction of steel sheet pile cofferdam.A two-dimensional hydrodynamic model is established for the downstream channel of Gezhouba Dam,and numerical simulation calculations are conducted for the demolition and reconstruction of steel sheet pile cofferdams under the maximum navigable flow of 35,000 m^(3) s at the Ship lock No.1.The calculation results show that when the diversion ratio of the two rivers is less than 0.9 and the smaller,the demolition of the steel sheet pile cofferdam has a greater impact on the navigation flow conditions in the downstream entrance area of the ship lock No.1.

关 键 词：葛洲坝 钢板桩围堰 通航水流条件 二维水动力模型 

分 类 号：U641[交通运输工程—船舶及航道工程]