考虑特殊桥位的深中通道伶仃洋大桥总体设计

伶仃洋大桥采用主跨1666 m双塔三跨连续漂浮体系悬索桥。设计要点主要包括:海中锚碇离岸10 km,通过施工方案比选,解决了离岸深水海中锚碇设计施工的关键技术难题;桥面距海面达90 m,通过开展节段模型和全桥气弹模型风洞试验,选定主梁气动外形,保证主桥的抗风性能;大桥地理位置特殊,通过建筑景观设计使全线和谐性得以塑造。

Overall Design of Lingdingyang Bridge in Shenzhen-Zhongshan Link

Lingdingyang Bridge is a suspension bridge with main span of 1666 m,double pylons,and three spans in continuous floating system.There are some key technologies adopted in this bridge.The marine anchor block is 10 km away from the shore,so the key technical problems in the design and construction of offshore deep-water anchorage are solved through the comparison and selection of design and construction schemes.The bridge deck is 90 m away from the sea surface,therefore,by performing segmental model test and whole-bridge aeroelastic wind tunnel test,the aerodynamic contour of the girder that can provide sufficient wind resistance to the bridge is selected.The bridge is located in a special place,by involving architectural design,the whole link's consistency is obtained.