摘要
选取上荆江公安—郝穴河段南五洲右汊进口处规划的梓柳河挖入式港池作为研究对象,建立了基于非结构网格的平面二维水沙数学模型,对比研究了2种港池口门布局方案(大、小口门布局方案)对工程河段河床冲淤变化和港池回淤特性的影响,并为港池布局方案比选提供技术支撑。结果表明:大、小口门布局方案引起工程河段冲淤变化调整范围均较为有限;小口门方案下港池进口宽度较小,且港池上游侧壁与主流交角较小,对港池口门附近回流范围与回流强度的抑制作用相对大口门方案更优,港池口门附近回淤量及回淤强度较大口门方案均显著偏小,有利于局部河势稳定和后期运行维护。
The planned excavated-in harbor basin of Ziliu River at the entrance of the right branch of South Wuzhou in the Gongan-Haoxue section of the upper Jingjiang river reach is selected as the research object.A planar two-dimensional water-sediment mathematical model based on unstructured grids is established.A comparative study is conducted on the impacts of two harbor basin entrance layout schemes(large and small entrance layout schemes)on the fluvial bed erosion and deposition changes in the project river reach and the siltation characteristics of the harbor basin,providing technical support for the comparison and selection of harbor basin layout schemes.The results show that the adjustment ranges of erosion and deposition changes in the project river reach caused by both the large and small entrance layout schemes are relatively limited.In comparison with the large entrance scheme,the small entrance scheme has a smaller entrance width of the harbor basin and a smaller intersection angle between the upstream sidewall of the harbor basin and the mainstream flow direction,so the inhibitory effect on the back-flow range and intensity near the harbor entrance is relatively better.The back-silting volume and intensity of the small entrance scheme are significantly less than those of the large entrance scheme.Therefore,the small entrance layout scheme is conducive to the local fluvial regime stability and the later operation and maintenance.
作者
汪飞
李俊
邴建平
贾建伟
WANG Fei;LI Jun;BING Jianping;JIA Jianwei(Bureau of Hydrology,Changjiang Water Resources Commission,Wuhan 430010,China;Upper Changjiang River Bureau of Hydrological and Water Resources Survey,Chongqing 400020,China)
出处
《武汉大学学报(工学版)》
北大核心
2025年第6期864-875,共12页
Engineering Journal of Wuhan University
基金
国家重点研发计划项目(编号:2022YFC3002701)。
关键词
挖入式港池
数值模拟
港池布局
上荆江河段
港池回淤
excavated-in harbor basin
numerical simulation
harbor basin layout
the upper Jingjiang river reach
harbor basin back-silting
