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采用挂篮施工的连续刚构边跨现浇段的支架形式多种多样,其设计目的是施工简便、安全牢固、确保质量及节约成本。在遂渝二线铁路薛家坝涪江左线特大桥连续刚构梁边跨现浇段施工时采用型钢吊架支撑,吊架分别利用原施工悬浇节段的挂篮及在墩顶预埋“工”字钢作支承点。吊架施工现浇段不仅结构简单、施工方便,而且在安全、质量及效益方面均取得了很好的效果。文章对型钢吊架的设计、施工方法进行了详细介绍,并对吊架进行了受力分析及验算,验证了方案的可行性,为以后同类桥型的施工提供参考。
The continuous rigid frame side-by-side cast-in-place section with hanging basket construction has various forms of supports, which are designed to be simple and convenient to construct, secure and secure, ensure the quality and save the cost. In Suining railway line Xuejiaba Fujiang left-line super-large bridge continuous rigid frame beam cast-in-situ construction section using steel hanger support, hangers were used to construct the cantilever section of the hanging basket and embedded in the pier top “工 ” steel for the support point. The cast-in-place section of hanger construction not only has the advantages of simple structure, convenient construction, but also good effect in safety, quality and benefit. In this paper, the design and construction methods of the steel hanger are introduced in detail. The force analysis and checking of the hanger are carried out to verify the feasibility of the scheme and provide reference for the construction of the similar bridge type in the future.