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首页> 外文期刊>Journal of Construction Engineering and Management >New Asynchronous-Pouring Rapid-Construction Method for Long-Span Prestressed Concrete Box Girder Bridges with Corrugated Steel Webs
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New Asynchronous-Pouring Rapid-Construction Method for Long-Span Prestressed Concrete Box Girder Bridges with Corrugated Steel Webs

机译：波形钢腹板大跨度预应力混凝土箱梁桥异步浇筑快速施工新方法

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摘要

Based on the traditional hanging basket cantilever construction of the prestressed concrete box girders, combined with the excellent shear capacity of the corrugated steel webs (CSWs), this paper introduces an improved cantilever construction method for long-span prestressed concrete (PC) girder bridges with CSWs, which is called the asynchronous-pouring rapid-construction (APRC). A remarkable change is that it uses the CSWs themselves as the main load-bearing members for supporting the hanging basket and girder segments. The equilibrium state of the new hanging basket system in the APRC method is optimized from the cantilever to a simply supported condition. Additionally, the dislocation construction of the top flange, bottom flange, and CSWs on three adjacent segments is accomplished simultaneously. Therefore, the construction efficiency is greatly improved because the number of construction platforms is increased to three compared with the single platform of the traditional hanging basket cantilever construction. In addition, it realizes the asynchronous pouring of the top and bottom concrete flanges in the same segment so that the pouring concrete has sufficient time to reach the required strength. Finally, by considering the longest prestressed concrete girder with CSWs in China, the whole construction process of the Fenghua River Bridge using the APRC method is systematically introduced. (C) 2019 American Society of Civil Engineers.
机译：在传统的预应力混凝土箱梁悬篮悬臂施工的基础上，结合波纹钢腹板的出色抗剪承载力，介绍了一种改进的大跨度预应力混凝土（PC）箱梁悬臂施工方法。 CSW，称为异步浇筑快速构造（APRC）。一个显着的变化是它使用CSW本身作为支撑吊篮和大梁段的主要承重构件。 APRC方法中新的吊篮系统的平衡状态从悬臂优化到简单支撑的状态。此外，同时完成三个相邻段上的顶部法兰，底部法兰和CSW的错位构造。因此，与传统的吊篮悬臂施工的单个平台相比，施工平台的数量增加到三个，大大提高了施工效率。另外，它实现了在同一段中的顶部和底部混凝土法兰的异步浇筑，从而使浇筑混凝土有足够的时间达到所需的强度。最后，通过考虑中国最长的带CSW的预应力混凝土梁，系统地介绍了采用APRC方法的奉化河大桥的整个施工过程。 （C）2019美国土木工程师学会。

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