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研究目的:在繁忙的铁路线上修建上跨立交桥,根据既要保证铁路的安全运营,又要考虑施工的顺利进行的特点,研究桥梁的设计中应该特别注意的问题,提出在适用不同线路条件下的桥梁结构形式,对日渐增多的跨线桥工程设计提供有益的借鉴。研究方法:结合上跨铁路立交桥的设计工点和设计经验,采用综合经济技术分析的研究方法。研究结果:从保证铁路安全运营的角度来综合考虑跨线桥的施工方法和结构设计,分别提出了适合于铁路区间和枢纽的常用桥跨方案。研究结论:位于铁路区间的桥跨结构采用预制架设法施工,适宜采用箱梁、T梁和空心板梁,位于铁路枢纽的桥跨结构采用转体、悬臂或顶推法施工,适宜采用斜拉桥、大跨刚构桥和钢混结合梁桥。
Research purposes: The construction of overpass over busy railway lines should be based on the need to ensure the safe operation of the railway, but also to consider the smooth construction of the characteristics of the bridge design should pay special attention to the issue proposed in the application of different line conditions Under the form of bridge structure, provide a useful reference to the increasing number of engineering design of flyover. Research Methods: Based on the design worksite and design experience of the overpass overpass, the research method of comprehensive economic and technical analysis is adopted. Research results: Considering the construction methods and structural design of flyover from the point of view of ensuring the safe operation of railway, the common bridge span schemes suitable for railway sections and hubs are respectively proposed. Research conclusions: The bridge span structure located in the railway section adopts the prefabricated frame method to construct, and the box beam, T beam and hollow slab beam are suitable to be used. The bridge span structure at the railway hub adopts swivel, cantilever or push-push method construction, Bridge, long-span rigid frame bridge and steel-concrete composite beam bridge.