以贵州铜大高速公路抚溪江大桥为工程背景,基于方案比选,对该净跨120m的现浇整体式钢筋混凝土箱形拱桥采用可整体横移、可调跨度和宽度的轻型钢拱架进行施工。该文介绍了所用钢拱架的构造做法、设计验算、施工要点。该方案具有适用于不同跨径和宽度的拱桥施工,拼装方便快捷,可避免水上作业,节省施工成本等优点。 Taking the Fuxi River Bridge on Guizhou Copper Highway as an example, the cast-in-situ monolithic reinforced concrete box arch bridge with a net span of 120m is constructed of light steel arch frame with adjustable traverse and width Construction. This paper introduces the construction of steel arch structure, design checking, construction essentials. The program is suitable for different span and width of the arch bridge construction, assembly convenient and quick, to avoid water operations, saving construction costs and other advantages.