在桥梁顶推施工过程中,导梁是十分重要的辅助结构。导梁的结构形式对于主梁顶推施工过程中的受力有很大的影响,这一点对于大跨柔性钢梁的顶推显得尤为突出。根据主梁和导梁在顶推施工过程中的整体和局部受力分析结果,恰当选择导梁的结构形式能够减少主梁在施工过程中的内力,保障施工的安全和质量,并且降低施工成本。 During the construction of the bridge, the guide beam is a very important auxiliary structure. The structure of the guide beam has great influence on the force during the construction of the main girder. This point is particularly prominent for the push-in of the large-span flexible steel girder. According to the results of the whole and partial stress analysis of the main girder and the guide girder in the process of jacking in, the proper choice of the structure of the guide girder can reduce the internal force of the main girder during the construction, ensure the safety and quality of the construction and reduce the construction cost .