曹娥江大闸闸上河道建桥通航水流条件  

Navigable flow conditions of bridge construction in the upper channel of the Cao e River gate

作　　者：郑国诞[1,2] 吴军君 史英标 曹颖[1,2] 唐子文 ZHENG Guo-dan;WU Jun-jun;SHI Ying-biao;CAO Ying;TANG Zi-wen(Zhejiang Institute of Hydraulics and Estuary,Hangzhou 310020,China;Zhejiang Provincial Key Laboratory of Estuary and Coast,Hangzhou 310020,China;Reconnaissance and Design Institute,Qiantang River Administration of Zhejiang Province,Hangzhou 310020,China)

机构地区：[1]浙江省水利河口研究院,浙江杭州310020 [2]浙江省河口海岸重点实验室,浙江杭州310020 [3]浙江省钱塘江管理局勘测设计院,浙江杭州310020

出　　处：《水运工程》2021年第6期141-146,共6页Port & Waterway Engineering

基　　金：浙江省科技计划项目(2015C03003);国家自然科学基金项目(51609214)。

摘　　要：曹娥江大闸从2008年底开始运行,平时关闸蓄水,洪汛期开闸放水。闸上河道从“洪冲潮淤”向“单向冲刷”转换,河床发生着较大的变幅。在这种江道环境中建设桥梁最重要的一个制约因素为通航水流条件,主要为工程河段的河势情况、流速流态条件以及桥梁建设后的影响。通过建闸后多年地形分析工程河段河势现状以及趋势,并通过建立平面二维数学模型对航道内流速进行计算分析。研究可知:1)若无较大人类活动干涉,工程河段河势稳定,滩槽格局不会发生变化。2)在通航高水位下,流速流态符合通航要求,建桥对航道的影响较小。因此在此河段建设桥梁是可行的。The Cao e River gate has been in operation since the end of 2008.The gate is normally closed for storage and opened for drainage during flood seasons.The river channel on the gate has changed from“scouring during the flood and silting during tide”to“single-direction scouring”,and the riverbed has undergone a large change.In this river environment,one of the most important restricting factors for the bridge construction is the navigable flow conditions,which are mainly the river regime,flow velocity and flow pattern conditions of the project reach,and the influence of the bridge construction.In this paper,the current situation and trend of the river regime of the project reach are analyzed based on the topography of many years after the gate was built,and the flow velocity in the channel is calculated and analyzed by establishing a plane two-dimensional mathematical model.The study shows that:1)Without the interference of large human activities,the river regime of the project reach is stable and the pattern of the beach channel will not change.2)The flow velocity pattern meets the navigation requirements under the navigation high water level,and the construction of the bridge will have little impact on the channel.Therefore,it is feasible to build bridges in this reach.

关 键 词：曹娥江 桥梁 通航 河势 流速 

分 类 号：U641[交通运输工程—船舶及航道工程] U611[交通运输工程—船舶与海洋工程]