摘要
广西壮族自治区贵港市青云大桥主桥为(46+88+280+88+46) m的"鱼"状双塔双索面预应力混凝土斜拉桥,上部结构设计为双边混凝土主梁+钢横梁+预制桥面板的新型组合结构,边主梁外侧增加了4. 5 m宽的薄壁翼缘板,带翼缘板的该种组合结构梁体为世界首例,常规的上行式牵索挂篮不能适应本桥悬臂浇筑施工。本文结合青云大桥主桥施工实践,介绍了双边混凝土主梁+钢横梁组合结构悬臂施工的下行式牵索挂篮设计及施工工艺,成功解决了斜拉桥带宽薄翼缘板混凝土边主梁悬臂浇筑施工难题,对今后类似主梁结构桥梁施工提供借鉴。
The main bridge of Qingyun Bridge in Guigang, Guangxi adopts a ＂fish-shaped＂ double-tower double-cable plane prestressed concrete cable-stayed bridge with （46 ＋ 88 ＋ 280 ＋ 88 ＋ 46）m. The superstructure is designed as a new composite structure with bilateral concrete girder, steel beam and prefabricated bridge deck, and 4.5 m wide thin-walled flange plates are added on the outer side of the side girder. This composite structure beam with flange plates is the first one in the world, and the conventional upward cable hanging basket can＇ t adapt to the cantilever pouring construction of this bridge. Combining with the construction practice of the main bridge of Qingyun Bridge, this paper introduced the design and construction technology of downward cable hanging basket for cantilever construction of bilateral concrete main girder ＋ steel beam composite structure, which successfully solved the construction problems of the cantilever pouring construction for the concrete side girder of the cable-stayed bridge with thin-walled flange plate. It could be served as valuable reference for similar girder structure bridge construction in the future.
作者
孙宁宁
唐文喜
Sun Ningning;Tang Wenxi(China Railway 17th Bureau Group 4th Engineering Co.Ltd.,Chongqing 401121,China)
出处
《铁道建筑技术》
2018年第8期49-52,63,共5页
Railway Construction Technology
基金
中国铁建股份有限公司科技研究开发计划项目(14-C21)
关键词
钢-混组合结构
下行式牵索挂篮
斜拉桥
施工技术
steel-concrete composite structure
descending type cable pulling hanging basket
cable stayed bridge
construction technology
