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A platform for research: civil engineering, architecture and urbanism
Non-upper parallel connection steel truss girder composite beam and construction method
The invention relates to a construction method of a non-upper parallel connection steel truss girder composite beam, which comprises the following steps of manufacturing a bridge deck slab section, and reserving a prestressed pipeline and a shear nail grouting groove in the bridge deck slab section, conveying the bridge deck slab sections to the steel truss girders to be positioned, and enabling the shear nail grouting grooves and the tops of the steel truss girders to be opposite to form grouting spaces, after the bridge deck slab sections are spliced into an integral structure, arranging prestressed steel beams in the prestressed pipelines, grouting the prestressed pipe after the prestressed steel beam is tensioned, so that the prestressed steel beam keeps the designed tension strength, and grouting the shear key grouting groove under the condition that the designed tension strength of the prestressed steel beam is kept. The construction method does not carry out upper parallel connection construction. By adopting a mode of firstly tensioning and then combining, the prestress in the concrete bridge deck slab can be always maintained at a relatively high level, the concrete bridge deck slab is effectively prevented from cracking, and meanwhile, the steel truss girder is of a structure without upper parallel connection, so that the construction cost is favorably saved, and meanwhile, the clear passing height of a lower layer can also be increased.
本发明涉及一种提供了一种无上平联钢桁梁结合梁的施工方法，其包括：制作桥面板节段，并在桥面板节段中预留预应力管道和剪力钉灌浆槽；将桥面板节段运至钢桁梁处进行定位，并使剪力钉灌浆槽与钢桁梁顶部相对形成灌浆空间；将桥面板节段拼接成整体结构后，在预应力管道内布置预应力钢束；将预应力钢束张拉后对预应力管道灌浆，使预应力钢束保持设计的张拉强度；在预应力钢束保持设计的张拉强度下对剪力键灌浆槽进行灌浆；且施工方法不进行上平联施工。采用“先张拉后结合”的方式，可保证混凝土桥面板内的预应力始终维持在较高的水平，有效防止混凝土桥面板开裂的同时使钢桁梁为无上平联结构，有助于节约工程造价，同时还可增加下层通行净高。
Non-upper parallel connection steel truss girder composite beam and construction method
The invention relates to a construction method of a non-upper parallel connection steel truss girder composite beam, which comprises the following steps of manufacturing a bridge deck slab section, and reserving a prestressed pipeline and a shear nail grouting groove in the bridge deck slab section, conveying the bridge deck slab sections to the steel truss girders to be positioned, and enabling the shear nail grouting grooves and the tops of the steel truss girders to be opposite to form grouting spaces, after the bridge deck slab sections are spliced into an integral structure, arranging prestressed steel beams in the prestressed pipelines, grouting the prestressed pipe after the prestressed steel beam is tensioned, so that the prestressed steel beam keeps the designed tension strength, and grouting the shear key grouting groove under the condition that the designed tension strength of the prestressed steel beam is kept. The construction method does not carry out upper parallel connection construction. By adopting a mode of firstly tensioning and then combining, the prestress in the concrete bridge deck slab can be always maintained at a relatively high level, the concrete bridge deck slab is effectively prevented from cracking, and meanwhile, the steel truss girder is of a structure without upper parallel connection, so that the construction cost is favorably saved, and meanwhile, the clear passing height of a lower layer can also be increased.
本发明涉及一种提供了一种无上平联钢桁梁结合梁的施工方法，其包括：制作桥面板节段，并在桥面板节段中预留预应力管道和剪力钉灌浆槽；将桥面板节段运至钢桁梁处进行定位，并使剪力钉灌浆槽与钢桁梁顶部相对形成灌浆空间；将桥面板节段拼接成整体结构后，在预应力管道内布置预应力钢束；将预应力钢束张拉后对预应力管道灌浆，使预应力钢束保持设计的张拉强度；在预应力钢束保持设计的张拉强度下对剪力键灌浆槽进行灌浆；且施工方法不进行上平联施工。采用“先张拉后结合”的方式，可保证混凝土桥面板内的预应力始终维持在较高的水平，有效防止混凝土桥面板开裂的同时使钢桁梁为无上平联结构，有助于节约工程造价，同时还可增加下层通行净高。
Non-upper parallel connection steel truss girder composite beam and construction method
一种无上平联钢桁梁的结合梁及施工方法
HAN RUOYU (author) / LU HONGLIANG (author) / SUN LIJUN (author) / CHEN GUIYUAN (author) / ZHANG QIANG (author) / HOU PENGFEI (author) / ZHAO AO (author) / FANG LIN (author) / JI HAIYAN (author) / ZHOU JIE (author)
2021-06-11
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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