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A platform for research: civil engineering, architecture and urbanism
Large-span long-connection highway-railway dual-purpose continuous steel truss girder large-tonnage support post-installation construction method
The invention relates to a post-installation construction method for a large-tonnage support of a large-span long-connection highway-railway dual-purpose continuous steel truss girder. The post-installation construction method comprises the following steps that a temporary support is installed; steel truss girders and highway bridge deck slabs are erected, the steel girders at the tops of the piers are jacked, pier top hogging moment area wet joints are constructed, transverse and longitudinal prestress is tensioned, the girders are dropped, and all the steel truss girders are folded and installed into an integral continuous steel truss girder; a slideway is installed corresponding to the position of a middle truss of the steel truss bridge, and the whole continuous steel truss girder is jacked; the temporary support is pulled away, a formal support is installed, and grouting is conducted in the formal support; and the formal support obtained after grouting is completed is maintained, and after maintenance is completed, the whole continuous steel truss girder falls onto the formal support. According to the embodiment of the invention, the temporary support is firstly mounted, then the steel truss girder is assembled, finally the assembled steel truss girder is jacked, and the formal support is mounted through the slide way, so that the technical problem that the formal support is difficult to mount in a narrow construction space is effectively solved, and the mounting precision and quality of the formal support are ensured.
本申请涉及一种大跨长联公铁两用连续钢桁梁大吨位支座后安装施工方法，包括以下步骤：安装临时支座；架设钢桁梁和公路桥面板，对各墩顶处的钢梁分别进行起顶、施工墩顶负弯矩区湿接缝，张拉横纵向预应力，落梁，将各钢桁梁合拢安装成整体的连续钢桁梁；对应钢桁桥中桁位置安装滑道，起顶整体的连续钢桁梁；抽离临时支座，安装正式支座，向正式支座内灌浆；养护灌浆完成的正式支座，养护完成后，将整体的连续钢桁梁落梁至正式支座上。本申请实施例通过先安装临时支座，再拼装钢桁梁，最后起顶拼装的钢桁梁，通过滑道安装正式支座，有效解决了狭小施工空间安装正式支座施工困难的技术问题，并保证了正式支座的安装精度和质量。
Large-span long-connection highway-railway dual-purpose continuous steel truss girder large-tonnage support post-installation construction method
The invention relates to a post-installation construction method for a large-tonnage support of a large-span long-connection highway-railway dual-purpose continuous steel truss girder. The post-installation construction method comprises the following steps that a temporary support is installed; steel truss girders and highway bridge deck slabs are erected, the steel girders at the tops of the piers are jacked, pier top hogging moment area wet joints are constructed, transverse and longitudinal prestress is tensioned, the girders are dropped, and all the steel truss girders are folded and installed into an integral continuous steel truss girder; a slideway is installed corresponding to the position of a middle truss of the steel truss bridge, and the whole continuous steel truss girder is jacked; the temporary support is pulled away, a formal support is installed, and grouting is conducted in the formal support; and the formal support obtained after grouting is completed is maintained, and after maintenance is completed, the whole continuous steel truss girder falls onto the formal support. According to the embodiment of the invention, the temporary support is firstly mounted, then the steel truss girder is assembled, finally the assembled steel truss girder is jacked, and the formal support is mounted through the slide way, so that the technical problem that the formal support is difficult to mount in a narrow construction space is effectively solved, and the mounting precision and quality of the formal support are ensured.
本申请涉及一种大跨长联公铁两用连续钢桁梁大吨位支座后安装施工方法，包括以下步骤：安装临时支座；架设钢桁梁和公路桥面板，对各墩顶处的钢梁分别进行起顶、施工墩顶负弯矩区湿接缝，张拉横纵向预应力，落梁，将各钢桁梁合拢安装成整体的连续钢桁梁；对应钢桁桥中桁位置安装滑道，起顶整体的连续钢桁梁；抽离临时支座，安装正式支座，向正式支座内灌浆；养护灌浆完成的正式支座，养护完成后，将整体的连续钢桁梁落梁至正式支座上。本申请实施例通过先安装临时支座，再拼装钢桁梁，最后起顶拼装的钢桁梁，通过滑道安装正式支座，有效解决了狭小施工空间安装正式支座施工困难的技术问题，并保证了正式支座的安装精度和质量。
Large-span long-connection highway-railway dual-purpose continuous steel truss girder large-tonnage support post-installation construction method
大跨长联公铁两用连续钢桁梁大吨位支座后安装施工方法
WANG HAIBIN (author) / XIE CAN (author) / HAN SHENGLI (author) / RAO PEIHONG (author) / FAN JUNHUI (author) / XING KAIWEI (author) / WANG JIAZHEN (author) / ZHANG ZHUOWEI (author)
2023-05-30
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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