摘要
针对河口段水流形态复杂多变,不利于组织河道疏浚施工的问题,以西部陆海新通道(平陆运河)为例,应用HEC-RAS一维非恒定流水力学计算模块,构建运河河口段水动力模型,并对模型糙率进行率定及模型精度进行验证。在此基础上,根据青年水闸(闸下)水位及流量特征,设定闸下4种流量(水位)工况,模拟分析河道流速的变化。结果表明:HEC-RAS模型在感潮河段模拟精度较高,具有较好的适用性;随断面流量的增加,石江墩河段S26一S32流速响应迅速,流速大值平均值较其他河段高约34.0%。研究成果可为运河河口段航道疏浚工程施工提供技术支撑。
In response to the complex and variable water flow patterns in the estuary section,which are not conducive to organizing river dredging construction,taking the New Western Land-sea Corridor Channel(Pinglu Canal)as an example,the HEC-RAS one-dimensional unsteady flow mechanics calculation module is applied to construct a hydrodynamic model for the canal estuary section,and the roughness of the model is calibrated and the accuracy of the model is verified.On this basis,based on the water level and flow characteristics of the Youth Sluice(under the sluice),four flow(water level)conditions are set under the sluice to simulate and analyze the changes in river flow velocity.The results show that the HEC-RAS model has high simulation accuracy and good applicability in tidal river sections;With the increase of cross-sectional flow,the flow velocity response of the section from S26 to S32 near Shijiangdun is rapid,and the flow velocity is about 34.0%higher than other sections.The research results can provide technical support for the construction of dredging projects in the estuary of the canal.
作者
李庆
覃振罡
林振良
LI Qing;QIN Zhen-gang;LIN Zhen-liang(College of Engineering and Architecture,Beibu Gulf University,Qinzhou,Guangxi 535011,China)
出处
《中国港湾建设》
2024年第10期26-31,共6页
China Harbour Engineering
基金
北部湾大学高层次人才科研启动项目(2019KYQD43)
广西教育厅高校科研项目(2022KY0414)
北部湾大学创新训练项目(S202211607215)。
