长江南京以下12.5m深水航道一期工程总平面方案优化
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摘要
通州沙、白茆沙河段受径流和潮汐的共同作用,水沙动力复杂,河床冲淤多变。通州沙、白茆沙是长江南京以下12.5 m深水航道上延南京首先碰到的2个重点碍航浅滩。在工程河段水沙特性研究的基础上,利用数模、物模试验对工程方案平面布置、通州沙潜堤齿坝高程、通州沙中水道过渡段高程以及白茆沙齿坝高程进行优化并形成优化推荐方案。研究表明,优化推荐方案的实施在一定程度上遏制了通州沙、狼山沙冲刷后退的趋势,有利于白茆沙的稳定,稳定两汉分流,形成南北水道稳定的分汊格局。
The river reach of Tongzhou shoal and Baimao shoal is influenced by both river discharge and tide.The hydrodynamics is complicated and river bed is active in siltation and erosion.Tongzhou shoal and Baimao shoal are two major obstacle shoals of the 12.5 m deepwater channel extending up to Nanjing in the Yangtze River.Based on hydrodynamic research results of the engineering river reaches,numerical and physical models are used to study the overall plain plan,tooth groin elevation of submerged dike for Tongzhou shoal and Baimao shoal,middle channel transition section elevation of Tongzhou shoal,and the suggested optimization plan.It is concluded that the optimization suggested plan can control the erosion and backward trend of Tongzhou shoal and Langshan shoal,stabilize the discharge diversion of the two branches,and form the bifurcation layout of north and south channels.
The river reach of Tongzhou shoal and Baimao shoal is influenced by both river discharge and tide.The hydrodynamics is complicated and river bed is active in siltation and erosion.Tongzhou shoal and Baimao shoal are two major obstacle shoals of the 12.5 m deepwater channel extending up to Nanjing in the Yangtze River.Based on hydrodynamic research results of the engineering river reaches,numerical and physical models are used to study the overall plain plan,tooth groin elevation of submerged dike for Tongzhou shoal and Baimao shoal,middle channel transition section elevation of Tongzhou shoal,and the suggested optimization plan.It is concluded that the optimization suggested plan can control the erosion and backward trend of Tongzhou shoal and Langshan shoal,stabilize the discharge diversion of the two branches,and form the bifurcation layout of north and south channels.
引文
[1]夏云峰,吴道文.长江下游三沙(福姜沙、通州沙、白茆沙)水道海轮深水航道整治工程预可行性研究[R].南京:南京水利科学研究院,2002.
[2]闻云呈,夏云峰.长江南京以下12.5 m深水航道建设工程一期工程(太仓—南通段)数模研究报告[R].南京:南京水利科学研究院,2012.
(3]徐元,张华.长江南京以下12.5 m深水航道建设工程一期工程(太仓—南通段)初步设计报告[R].上海:上海航道勘察设计研究院有限公司院,2012.
[4]夏云峰,杜德军.长江南京以下12.5 m深水航道建设工程一期工程(太仓—南通段)定动床物模研究报告[R].南京:南京水利科学研究院,2012.
[2]闻云呈,夏云峰.长江南京以下12.5 m深水航道建设工程一期工程(太仓—南通段)数模研究报告[R].南京:南京水利科学研究院,2012.
(3]徐元,张华.长江南京以下12.5 m深水航道建设工程一期工程(太仓—南通段)初步设计报告[R].上海:上海航道勘察设计研究院有限公司院,2012.
[4]夏云峰,杜德军.长江南京以下12.5 m深水航道建设工程一期工程(太仓—南通段)定动床物模研究报告[R].南京:南京水利科学研究院,2012.
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