立交桥小半径曲线钢箱梁吊装交通安全导行

Traffic Safety Guiding in Hoisting of Steel Box Girder with Small Radius Curve of Overpass

现浇混凝土连续梁因弧线优美线形圆滑,在小半径曲线桥中应用广泛,小半径曲线钢箱梁却鲜有应用,根据承德至北京高速公路互通立交现场实际施工情况,对半径较小的平曲线上钢箱梁的交通导行进行研究论述。互通立交线型结构复杂,施工周期长影响因素多,交通是最为突出问题。如何做到高效快捷的实施,有效缩短工期,最大程度地减少对交通通行能力的影响是创新点所在,总之,以跨越承德至北京高速公路的互通立交钢箱梁工程为背景,分析了为解决交通安全导行采取的具体措施,为类似互通立交实施提供参考借鉴。

Cast-in-place continuous concrete girder is widely used in small radius curved bridge because of its beautiful and smooth curves,while steel box girder with small radius curve is rarely used.According to the actual construction of Chengde to Beijing expressway interchange,the traffic guidance of steel box girder with small radius flat curve is studied and discussed.The interchange linear structure is complex,the construction period is long,and the influencing factors are many.The traffic is the most prominent problem.How to do the implementation of efficient and quick,shorten the construction period,minimize the impact on the traffic capacity is innovative,in a word,cross chengde to Beijing highway interchanges steel box girder of the project as the background,analysis to solve the traffic safety guide lines take concrete measures to provide reference for the similar interchanges.