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钢箱梁越来越多地运用于公路建设项目中,特别是在大型互通(几层交汇)及跨高速及城市主干道中应用发挥着不可替代的作用,钢混叠合梁受力条件好,具有操作简单,施工速度快的特点,现在越来越多的被运用于施工难度大、跨越幅度大的桥梁。本文以宁波绕城高速公路7B标A匝道桥为实施案例,对大跨径匝道桥钢箱梁制作加工,架设安装,预应力桥面板浇筑施工三方面进行研究,总结出一套大跨径匝道桥叠合钢箱梁施工技术供类似项目参考借鉴。
Steel box girder is used more and more in highway construction projects, especially in large-scale interworking (layers of convergence) and across high-speed and urban main road applications play an irreplaceable role, the steel-reinforced composite beams under good stress conditions, with Simple operation, construction speed characteristics, more and more are now being used in the construction of large, large span of the bridge. In this paper, Ningbo Expressway 7B standard A ramp bridge for the implementation of the case, the production of large span ramp steel box girder processing, erection and installation of prestressed bridge deck pouring construction of three aspects, summed up a set of large-span ramp Construction Technology of Bridge Laminated Steel Box Girder for Reference of Similar Projects.