大直径钢圆筒竖直海运技术研究与应用

Research and application of sea-transport technology for erected large diameter steel cylinders

某跨海大桥工程主体采用桥隧结合方案,隧道两端设置海中人工岛,采用大直径钢圆筒作为岛壁结构。钢圆筒在上海某生产基地生产制造,距筑岛施工现场800 n mile,运输船装载钢圆筒航行4 d时间抵达。利用Ansys软件对钢圆筒和运输船进行整体有限元建模,参考相关规范校核钢圆筒强度和运输船甲板强度,分析大直径钢圆筒竖直海运的可行性。经过15个航次的运输,将120个钢圆筒顺利运输至施工现场,这种运输方式能够大大缩短钢圆筒交付时间,具有显著的经济效益。

The main structure of a cross-sea bridge project adopts the combined scheme of bridge and tunnel, the artificial islands are set at both ends of the tunnel, and the large-diameter steel cylinders is used as the island wall. The steel cylinders were manufacturing at shanghai base, 800 n mile away from artificial lands which will take 4 days for the transport vessel sailing. Using Ansys software to build the whole finite element modeling for steel cylinder, refer to the relevant specification for steel cylinder strength and carrier deck strength, we analyzed the feasibility of sea-transport for erected large diameter steel cylinders. After 15 times of transportation, 120 steel cylinders were successfully transported to the construction site. This mode of transportation can greatly shorten the delivery time of steel cylinders and has significant economic benefits.