强沿岸输沙海岸港口建设对岸线变迁影响数值模拟研究  

Numerical modeling of shoreline evolution after harbor construction at strong longshore sediment transport coast

作　　者：解鸣晓[1,2] 李姗 张弛[4] 李孟国 姚姗姗[1,2] 李文丹[1,2] XIE Ming-xiao;LI Shan;ZHANG Chi;LI Meng-guo;YAO Shan-shan;LI Wen-dan(National Engineering Laboratory for Port Hydraulic Construction Technology, Tianjin Research Institute for Water Transport Engineering, M.O.T., Tianjin 300456, China;Key Laboratory of Engineering Sediment, Tianjin Research Institute for Water Transport Engineering, M.O.T., Tianjin 300456, China;Key Laboratory of Coastal Engineering Hydrodynamics of CCCC,CCCC Tianjin Port Engineering Institute Co., Ltd., Tianjin 300222, China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, Jiangsu 210098, China)

机构地区：[1]交通运输部天津水运工程科学研究所港口水工建筑技术国家实验室,天津300456 [2]交通运输部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456 [3]中交天津港湾工程研究院有限公司,中国交建海岸工程水动力重点实验室,天津300222 [4]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《中国港湾建设》2017年第12期19-24,56,共7页China Harbour Engineering

基　　金：国家自然科学基金面上项目(51779112);天津市自然科学基金青年项目(16JCQNJC06900);交通运输部天津水运工程科学研究所科研创新基金项目(TKS170101);交通运输部应用基础研究项目(2014329224330)

摘　　要：以非洲西海岸塞拉利昂码头工程为例,基于一线模型理论模拟计算了港址沿岸输沙率,以及码头拦沙堤建成后的上、下游岸线长期变迁。根据模拟成果,工程海域沿岸输沙强度极大,年总输沙率可达94.5万~97.1万m^3/a,净输沙率达71.1万~73.6万m^3/a,码头拦沙堤拦截了自南向北的沿岸输沙,堤身南侧形成明显堆积,堤身北侧形成侵蚀。根据与西非海岸类似港口工程实际经验对比,文中数值模拟所得成果是合理的。Using the coal port of Sierra Leone at western Africa as an example,the longshore sediment transport rates(LSTR),as well as the shoreline evolution of the upper and lower reaches after the completion of wharf sediment breakwater were modeled based on the one-line model.According to the modeling results,the LSTR at the study coast is extremely large,the annual total LSTR is in the range of94.5伊104to97.1伊104m3/a,and the net LSTR is around71.1伊104to73.6伊104m3/a.The wharf sediment breakwater intercepted the longshore sediment transport from the south to the north,which forms the shoreline deposition at the south side and the shoreline erosion at the northern side.Comparisons with actual experience of the similar harbor projects in West Africa,it is proved that the model results are reasonable.

关 键 词：强沿岸输沙 港口建设 岸线变迁 一线模型 数值模拟 

分 类 号：U651[交通运输工程—港口、海岸及近海工程]