The north-south approach bridge of Longtan Yangtze River Bridge has the characteristics of multiple pipelines,com-plex ground transportation system,multiple control factors for span layout and limited pier location conditions.After compre-hensive comparison and selection,steel concrete composite beam scheme with simple structure,reasonable stress and conven-ient construction are adopted.Constant section steel concrete composite beams are used for spans ranging from 30 m to 60 m,and variable section steel concrete composite beams are used for spans ranging from 78 m to 91 m.The research main-ly analyzes and compares the design and construction plans of standard span and large span steel-concrete composite beams from the perspectives of structural mechanical performance,safety,economy,and construction convenience.The design con-cept of steel-concrete composite beams is standardization,industrialization,large-scale and assembly,which improves produc-tion efficiency and structural reliability,reduces the risk of high-altitude operations,makes it easy to control engineering quali-ty.The project is the first large-scale application of multi main beam trough shaped steel concrete composite beams in the Yan-gtze River Bridge,providing reference for the design and construction of subsequent steel concrete composite beams.
关键词
钢混组合梁/多主梁槽形截面/逐孔架设/间断浇筑法/设计/施工
Key words
steel concrete composite beam/multi main beam groove section/hole by hole erection/intermittent pou-ring method/design/construction
维普
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