摘要
以西北江河道地形资料、工程附近河段水下地形图、工程平面布置图及相关的水文数据等为依据,采用一、二维水流数学模型研究南沙凤凰一桥建设对河道壅水、流速、流态等影响,并利用珠江三角洲网河区一维水动力学模型计算桥梁工程建设前后河道不同设计频率下的设计洪潮水面线、汊道分流比变化,利用二维水动力学模型计算各种水文组合下的桥梁工程建设前后河道流速、流态变化,进而分析工程对河势稳定等影响。结果表明,桥梁工程建设对所在河道的整体河势影响较小。
Based on river channel geomorphologic map of delta of West and North river, underwater topography map nearby river channel of the bridge construction, the layout plan of the bridge project and hydrological data, the influence of first Fenghuang bridge construction on backwater, flow velocity and flow regime of the river channel are deeply ana- lyzed with one-dimensional and two-dimensional flow mathematical models. The design water surface curve of water and tidal flow under different design frequency and the ratio of distributary channels before and after construction of the bridge project are researched by using one-dimensional hydrodynamics model of reach river of Pearl river delta. The changes of flow velocity and flow regime of the river channel under each hydrological state before and after construction of the bridge project are studied by using two-dimensional hydrodynamics model. The influence of bridge construction project on stability of channel regime is analyzed. The results show that the impact of the bridge construction on the channel regime is small.
出处
《水电能源科学》
北大核心
2011年第11期47-50,共4页
Water Resources and Power
基金
广东省科技计划基金资助项目(2010B031900022)
华南理工大学中央高校基本科研业务费专项资金资助项目(2009ZM0051
2009ZM0044)
关键词
桥梁建设
防洪影响
珠江三角洲网河区
水动力学模型
雍水
流速流态
bridge construction
impact of flood control
reach river of Pearl river delta
hydrodynamics model
backwater
flow velocity and flow regime
