港珠澳大桥潮流物理模型设计的关键问题  

A key problem of physical model design for tidal current around Hong Kong-Zhuhai-Macao Bridge

作　　者：徐群[1] 莫思平[1] 季荣耀[1] 王驰[1] 

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《水利水运工程学报》2012年第2期91-96,共6页Hydro-Science and Engineering

摘　　要：港珠澳大桥横跨伶仃洋河口,该水域南北长75 km,东西宽约50 km,模拟总水域面积大于2 100 km2.针对此类型的桥梁潮流物理模型设计,桥墩桩群处理是关键问题之一.对于小尺度单桩如仅按几何相似比尺进行设计,则无法满足阻力相似,因此本模型在满足潮流运动相似原则的基础上,充分考虑大桥桩群总阻力相似的方法进行概化处理,并经过水流试验验证.结果表明该物理模型桩群概化处理和边界控制合理,较好地模拟了大桥建设对水流运动影响,为跨海特大型桥梁模型设计提供了切实可行的有效方法.The simulated area which is 75 kilometers long and 50 kilometers wide of Hongkong-Zhuhai-Macao Bridge tidal physical model is larger than 2,100 km2 in Lingdingyang estuary. How to deal with a cluster of piles with bridge piers is the most important problem. If we just consider it as a small scale model to use the geometry simulation for a single pile, the model won＇t have similar resistance. So based on the principle of tidal movement similarity, the total resistance similarity of the piles with bridge piers is considered to generalize the model. After the physic model＇s flow simulation, the reserch results show that the model is reasonable in generalizing the cluster of piles with bridge piers and the boundary condition. The model is well used for simulating the impacts upon flow movement caused by the bridge construction, and it provides an available method for the physical model design of huge cross-sea bridges.

关 键 词：物理模型设计 桩群 阻力相似 港珠澳大桥 

分 类 号：TV131.4[水利工程—水力学及河流动力学] U442.39[建筑科学—桥梁与隧道工程]