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A platform for research: civil engineering, architecture and urbanism
Construction method for assembling prefabricated cantilevers of large-span sections of bridge to span existing bridge
The invention belongs to the technical field of bridge construction, and discloses a construction method for assembling prefabricated cantilevers of large-span sections of a bridge to span existing bridge. Segment beams are manufactured in a factory-like centralized mode and transported to the site in a segmented mode to be assembled. The sections are symmetrically installed one by one till midspan closure, and a pavement layer does not need to be poured on the bridge floor. After concrete of the closure section is poured, the last batch of steel strands are tensioned, and system conversion ofthe whole bridge is completed. The segmental beams are assembled by utilizing a deck crane lifting beam, the segments are connected by adopting shear keys and epoxy resin glue, and permanent tensioning is carried out after each symmetrical segment is installed. The segments are connected through the shear keys and the epoxy resin glue, construction is easy and convenient, the effects of short construction period and attractive bridge type are achieved, and the prefabricated segment cantilever assembled bridge can well meet the structural function requirement and has good technical and economic benefits.
本发明属于桥梁施工技术领域，公开了一种桥梁大跨径节段预制悬臂拼装跨越既有桥梁的施工方法，节段梁采用工厂化集中制作，分段运至现场进行拼装；逐个节段对称安装直至跨中合拢，桥面无需再浇筑铺装层；浇筑合拢段混凝土后进行最后一批钢绞线张拉，完成整联桥的体系转换。节段梁利用桥面吊机提梁进行拼装，节段之间采用剪力键和环氧树脂胶连接，每对称节段安装完成后进行永久张拉。节段之间通过剪力键和环氧树脂胶进行连接，施工简单方便，具有施工周期短、桥型美观的效果，预制节段悬臂拼装桥梁不仅可以很好地满足结构功能要求，而且具有良好的技术经济效益。
Construction method for assembling prefabricated cantilevers of large-span sections of bridge to span existing bridge
The invention belongs to the technical field of bridge construction, and discloses a construction method for assembling prefabricated cantilevers of large-span sections of a bridge to span existing bridge. Segment beams are manufactured in a factory-like centralized mode and transported to the site in a segmented mode to be assembled. The sections are symmetrically installed one by one till midspan closure, and a pavement layer does not need to be poured on the bridge floor. After concrete of the closure section is poured, the last batch of steel strands are tensioned, and system conversion ofthe whole bridge is completed. The segmental beams are assembled by utilizing a deck crane lifting beam, the segments are connected by adopting shear keys and epoxy resin glue, and permanent tensioning is carried out after each symmetrical segment is installed. The segments are connected through the shear keys and the epoxy resin glue, construction is easy and convenient, the effects of short construction period and attractive bridge type are achieved, and the prefabricated segment cantilever assembled bridge can well meet the structural function requirement and has good technical and economic benefits.
本发明属于桥梁施工技术领域，公开了一种桥梁大跨径节段预制悬臂拼装跨越既有桥梁的施工方法，节段梁采用工厂化集中制作，分段运至现场进行拼装；逐个节段对称安装直至跨中合拢，桥面无需再浇筑铺装层；浇筑合拢段混凝土后进行最后一批钢绞线张拉，完成整联桥的体系转换。节段梁利用桥面吊机提梁进行拼装，节段之间采用剪力键和环氧树脂胶连接，每对称节段安装完成后进行永久张拉。节段之间通过剪力键和环氧树脂胶进行连接，施工简单方便，具有施工周期短、桥型美观的效果，预制节段悬臂拼装桥梁不仅可以很好地满足结构功能要求，而且具有良好的技术经济效益。
Construction method for assembling prefabricated cantilevers of large-span sections of bridge to span existing bridge
桥梁大跨径节段预制悬臂拼装跨越既有桥梁的施工方法
CUI FANGKAI (author) / JI ZHONG (author) / YANG LE (author) / NAI GUOBAO (author) / DING QINGLIANG (author) / LI ZHIMIN (author) / GUO MAQIAN (author) / WANG HAI (author) / YU YONGBO (author) / GUO JUNHUI (author)
2020-12-15
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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