摘要
鸭栏码头受岸线规划限制,选址在界牌河段儒溪边滩和上边滩之间的窜沟内,并伴有港池和进港航道的疏浚作业,是一种特殊的边滩嵌入式码头,且下游紧邻丁坝整治建筑物,工程河段河床演变及航道条件复杂。为研究工程对河段航道条件的影响,通过开展界牌河段物理模型试验,分析了工程实施前后水位、流速、汊道分流比和河床冲淤的变化,结果表明:工程建设对长江主航道通航水流条件影响较小,但码头桩群和进港航道疏浚的联合作用,导致上边滩滩头左缘有所冲刷,丁坝护滩功能受到一定影响,需要实施补偿工程来消减该不利影响。
Limited by the shoreline planning,Yalan wharf only chooses site in the branch between Ruxi shoal and upper shoal at Jiepai reach,which is accompanied by dredging of harbor basin and approach channel.As a kind of special wharf embedded in the shoal,the downstream is often close to the shoal regulation buildings,such as spur dikes,and the riverbed evolution and channel conditions of the reach are complex.In order to study the influence of the wharf pile group and large-scale dredging on the channel conditions,this paper adopts the physical model test of Jiepai reach to determine the scope and degree of influence,including the changes of water level,velocity,branch diversion ratio and riverbed erosion and deposition before and after the implementation of the engineering are analyzed.The results show that the engineering construction has little impact on the navigation flow conditions of the main shipping channel of the Yangtze River.However,due to the combined action of wharf piles and dredging of approach channel,the left edge of upper shoal head is scoured.To a certain extent,scouring affects the shoal protection function of spur dike,and compensation engineering needs to be implemented to mitigate this adverse impact.
作者
张健
倪春飞
许慧
陈珺
ZHANG Jian;NI Chun-fei;XU Hui;CHEN Jun(Nanjing Hydraulic Research Institute,Nanjing 210029,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Huadong Engineering Corporation Limited,Hangzhou 311100,China)
出处
《中国农村水利水电》
北大核心
2022年第6期40-45,共6页
China Rural Water and Hydropower
基金
三峡后续工作科研项目(SXHXGZ-2020-3)。
关键词
嵌入式码头
航道条件
河势
桩群模拟
embedded wharf
channel conditions
river regime
pile group simulation
