跨武广特大桥转体连续梁设计

Design of Swinged Continuous Beam of Super-large Bridge Crossing Wuhan-Guangzhou High-speed Railway

研究目的:跨武广特大桥是武咸城际铁路上跨武广客运专线一座特大桥,主跨采用(48+80+48)m连续梁结构,该梁采用先悬臂浇注,后转体的施工方法。本文从梁体构造、梁体施工方法、转体施工等方面对本桥连续梁进行介绍。研究结论:上跨繁忙既有线铁路施工,转体施工可谓一种较好方法选择,该方法经济实用、安全可靠、减少上跨桥梁施工对既有线的影响,降低风险,并有广阔的应用前景。本文为转体连续梁的设计与施工提供一实例,为今后同类型桥,特别是上跨客运专线的桥梁设计提供重要的参考价值。

Research purposes： The super- large bridge of the Wuhan -Xianning intercity railway is the bridge crossing the Wuhan - Guangzhou High - speed Railway, with main span of 48 ＋ 80 ＋ 48 m continuous beam structure. The construction method of grouting cantilever first and then grouting the swing body was conducted to the beam. In this paper, the introduction is given to the beam construction, including the beam structure, the beam construction method and erection by swing method Research conclusions：The erection by swing method is a good way for construction of the bridge above - crossing the busy existing railway. This method has the features of money - saving, practice, safety, reliability, cutting the influence of the construction on traffic and reducing the construction risk, and has a wide applicable prospecting. The design and construction of the swinged continuous beam presented in this paper can provide the important reference to the similar works, especially to the bridge design for passenger dedicated line