和畅洲水道深水潜堤施工过程引起的水动力变化  

Alteration of hydrodynamic conditions during construction process of proposed submerged breakwater in deep water area of Hechangzhou waterway

作　　者：胡颖[1,2] 文天翼 马爱兴 蔡建冬[4] 李玉婷 HU Ying;WEN Tian-yi;MA Ai-xing;CAI Jian-dong;LI Yu-ting(Nanjing Hydraulic Research Institute,Nanjing 210029,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]水文水资源与水利工程科学国家重点实验室,江苏南京210029 [3]河海大学水利水电学院,江苏南京210098 [4]中交第三航务工程勘察设计院有限公司,上海200032

出　　处：《水运工程》2018年第4期1-7,共7页Port & Waterway Engineering

基　　金：交通运输部科技项目(2014328J17170);国家自然科学基金项目(51579216;51309160);长江南京以下12.5米深水航道二期工程科研项目(C2EQ2050182)

摘　　要：和畅洲水道拟在北汊修建潜堤的位置水深流急,施工难度大。通过建立三维水动力数学模型,计算分析拟建上游潜堤逐步抬高施工过程的不同阶段中潜堤附近水流结构的变化情况。结果表明:施工过程中潜堤附近局部水面比降最大达3‰;随着施工过程的推进,深槽主流流速及流速梯度逐渐增大,对堤前流速影响主要在30 m范围以内,最大垂线平均流速和表面流速分别为1.85、2.1 ms。研究成果可为和畅洲大水深施工过程中可能遇到的局部水动力变化导致的施工措施的调整提供参考,以提高施工精度。The submerged breakwater intended to be built in the north branch of Hechangzhou waterway located at deep water with more than 40 m depth and high local velocity,which makes the construction of the submerged breakwater difficult.Based on a three-dimensional hydrodynamic model,we analyze the changes of hydrodynamic structures in different stages of“gradually raise”construction sequence.The results show that surface slope of local water near submerged breakwater during the construction process is up to 3‰.With the advancement of the construction process,the main flow velocity and velocity gradient of deep water area are increasing gradually.Especially in the range of 30 m in front of the breakwater,the maximum vertical mean velocity and surface velocity are 1.85 m s and 2.1 m s respectively.The results can be used to provide reference for the adjustment of construction measures caused by local hydrodynamic changes during the construction of submerged breakwater in deep water,so as to improve the construction accuracy.

关 键 词：潜堤 三维水动力数值模拟 施工过程 垂线流速分布 

分 类 号：TV135.6[水利工程—水力学及河流动力学] U652.3[交通运输工程—港口、海岸及近海工程]