港珠澳大桥桥墩浮拖运输方案分析

根据港珠澳大桥桥墩结构质量和尺度巨大的特点，提出了合理的装船运输方案.采用水动力分析软件，建立桥墩的三维质量模型、桥墩主体与半潜驳船的驳运联合体模型.基于势流理论计算船体受到的波浪荷载，分析联合体在海上拖航过程中的稳定性、运动响应，检验桥墩浮拖过程的稳定性.计算结果表明:不采用加固措施，横浪条件下桥墩的稳定性难以满足，浪向角不大于45°时满足拖航要求；采用侧向支墩及钢丝绳对桥墩局部加固，桥墩在所有浪向条件下均满足稳定性要求.

Analysis of floating transportation program of Hong Kong-Zhuhai-Macao Bridge piers

An analysis method on shipment and offshore transportation of Hong Kong Zhuhai Macao Bridge piers is studied and the reasonable transportation program is designed in this paper. According to the huge structure′s weight and scale， the shipment scheme is developed. A 3D mass model of bridge pier and transportation system model including bridge pier and barge is established with hydrodynamic software. By calculating wave loads on the barge based on potential flow theory， the stability and motion response analysis of the barge pier model is carried out， and the stability of bridge pier during offshore transportation is examined. The calculated results show that without partial reinforcement the stability requirement of bridge pier is difficult to meet under the action of transverse wave， and that transportation requirements are satisfied in the wave angle less than 45 degrees. The stability of the bridge pier during offshore transportation under all wave directions is satisfied through partial reinforcement with lateral buttress and wire rope.