混凝土桥梁悬臂施工中,最困难的任务之一就是施工挠度的计算与控制,只有预拱度设置合理,才能保证一个跨径内将要合拢的两个悬臂端可能在同一水平线上,也才能使桥梁上部结构经历施工和运营,反复发生向上或向下变形挠度后,仍是设计所期望的标高、线形,本文重点讨论悬臂施工状态的挠度控制及预拱度的设置。 Concrete bridge cantilever construction, one of the most difficult task is the construction of the calculation and control of deflection, only the pre-camber set reasonable, in order to ensure that within a span of two cantilever ends may be in the same horizontal line, but also to make the bridge After the upper structure undergoes construction and operation, repeated upward or downward deformation deflection is still the desired elevation and line shape of the design. This article focuses on the deflection control and pre-camber setting of the cantilever construction state.