摘要
重庆丰都长江二桥主桥采用(70.5+215.5+680.0+245.5+70.5)m钢箱梁斜拉桥结构,为双向四车道公路桥,桥面全宽26.5m。主梁采用正交异性桥面板流线型扁平钢箱梁,沿纵向分别设有两道外侧纵腹板、两道中间纵隔板及标准间距为3m的实腹式横隔板。斜拉索在钢箱梁上的锚固采用锚拉板结构形式。钢箱梁架设采用在桥塔两侧对称、同步进行梁段悬臂拼装的施工方案,先边跨合龙,后中跨合龙。
The second Yangtze River Bridge in Fengdu of Chongqing is a cable-staged bridge with spans of（70.5＋215.5＋680.0＋245.5＋70.5） m.It has a width of 26.5 m which can carry two lanes each direction.The girder used is a streamlined flat steel box girder with steel orthotropic deck plate.The box girder has two outer webs and two inner webs along the longitudinal direction which divide the box into three cells.The diaphragms placed at intermittently along the span in each 3 m.The anchor chair on the girder is steel anchor plate form.This bridge adopt the cantalever construction method which require constructed the girder symmetrically and synchronously.When approach closure,colsed the side span firstly and then closed the mid-span.
出处
《钢结构》
2012年第1期32-35,共4页
Steel Construction
关键词
斜拉桥
钢箱梁
结构设计
施工方案
cable-staged bridge
steel box girder
structure design
construction method
