摘要
为连续跨越洪湾水道与磨刀门水道通航孔,珠海洪鹤大桥主航道桥采用共用1个交接墩的2座主跨500 m结合梁斜拉桥串联方案,跨径布置为2×(73+162+500+162+73)m。该桥采用半飘浮体系,主梁采用钢主梁与预制混凝土桥面板构成的结合梁,桥塔采用平面钻石形钢筋混凝土结构,斜拉索采用钢绞线拉索,塔、墩基础均采用钻孔灌注群桩基础。通过在交接墩和辅助墩墩顶设置横桥向钢阻尼器解决了软土场地上2座串联大跨度斜拉桥的横桥向减隔震问题;通过在主梁两侧设置风嘴、在桥面下设置稳定板,有效保证了成桥状态与典型施工状态下桥梁的颤振和涡激振动性能满足相关要求。结构分析表明,该桥受力性能良好,安全可靠。
The main navigational channel bridge of Honghe Bridge in Zhuhai consists of two composite girder cable-stayed structures that are arranged in tandem and share a juncture pier to create a continuous crossing over both the navigation channels of Hongwan Waterway and the Modaomen Waterway.The two cable-stayed structures are identical semi-floating systems,each with span arrangement of 73,162,500,162,and 73 m.The superstructure is formed of steel main girders and the precast concrete deck slabs.The pylons are plan diamond-shaped reinforced concrete structures,stay cables are composed of steel strands,and foundations of the pylons and piers comprise group bored piles.Transverse steel dampers are installed on the tops of the juncture pier and the auxiliary piers to address the transverse seismic effects on the tandem long-span cable-stayed bridges on soft soil.To deal with the issues of buffeting and vortex-induced vibration of the complete bridge and the bridge under typical construction condition,the main girders are fitted with wind vanes,and stabilizing plates are added below the deck for intensification.The structural analysis demonstrates that the load bearing performance of the bridge is sound,and the structure is safe and reliable.
作者
陈维家
张强
何铁明
CHEN Wei-jia;ZHANG Qiang;HE Tie-ming(Zhuhai Communication Group,Zhuhai 519000,China;China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Wuhan 430050,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2020年第4期77-81,共5页
Bridge Construction
关键词
斜拉桥
结合梁
钻石形桥塔
钢绞线斜拉索
抗风
抗震
总体设计
施工方案
cable-stayed bridge
composite girder
diamond-shaped pylon
steel-strand cable
wind effect
seismic effect
overall design
construction scheme
