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A platform for research: civil engineering, architecture and urbanism
Prestressed concrete box girder cast-in-place and girder falling construction method
The invention discloses a prestressed concrete box girder cast-in-place and girder falling construction method. The method comprises the following steps that 1, a high-position girder body is cast; 2, the beam body is supported on a temporary support, a guide beam system is installed, and a jack and a bearing piece are installed on the pier top; 3, the beam body is jacked through the jack, the temporary support is disassembled, the permanent support is installed, the jack is retracted, the beam body is supported on the bearing piece, first-time beam falling is completed, and the steps are repeated till the beam body falls to the designed position; and 4, grouting of the support is completed, the jack, the bearing piece and the guide beam system are dismantled, and beam falling is completed. The limited space of the top face of the bridge pier is reasonably utilized, and the temporary road-crossing scaffold, the temporary support, the jack and the guide beam system are comprehensively utilized; the problems of box girder cast-in-place, prestress tensioning, girder falling in place and support installation construction under the conditions of large span, large weight, insufficient construction clearance under the bridge and limited bridge end tensioning sequence are effectively solved.
本发明公开了一种预应力混凝土箱梁现浇、落梁施工方法，包括以下步骤：步骤1：高位梁体现浇；步骤2：将梁体支撑在临时支座上，安装导梁系统，墩顶安装千斤顶及承接件；步骤3：通过千斤顶顶升梁体，拆除临时支座，安装永久支座，收缩千斤顶，梁体支撑在承接件上，完成第一次落梁，重复上述步骤直至落位至设计位置；步骤4，完成支座灌浆，拆除千斤顶、承接件和导梁系统，完成落梁。本申请通过合理利用桥墩顶面有限空间以及综合运用临时跨路脚手架、临时支座、千斤顶和导梁系统，在不影响桥下道路正常通行的情况下，有效地解决了大跨度、大重量、桥下施工净空不足和桥端张拉顺序受限条件下箱梁现浇、预应力张拉、落梁就位及支座安装施工。
Prestressed concrete box girder cast-in-place and girder falling construction method
The invention discloses a prestressed concrete box girder cast-in-place and girder falling construction method. The method comprises the following steps that 1, a high-position girder body is cast; 2, the beam body is supported on a temporary support, a guide beam system is installed, and a jack and a bearing piece are installed on the pier top; 3, the beam body is jacked through the jack, the temporary support is disassembled, the permanent support is installed, the jack is retracted, the beam body is supported on the bearing piece, first-time beam falling is completed, and the steps are repeated till the beam body falls to the designed position; and 4, grouting of the support is completed, the jack, the bearing piece and the guide beam system are dismantled, and beam falling is completed. The limited space of the top face of the bridge pier is reasonably utilized, and the temporary road-crossing scaffold, the temporary support, the jack and the guide beam system are comprehensively utilized; the problems of box girder cast-in-place, prestress tensioning, girder falling in place and support installation construction under the conditions of large span, large weight, insufficient construction clearance under the bridge and limited bridge end tensioning sequence are effectively solved.
本发明公开了一种预应力混凝土箱梁现浇、落梁施工方法，包括以下步骤：步骤1：高位梁体现浇；步骤2：将梁体支撑在临时支座上，安装导梁系统，墩顶安装千斤顶及承接件；步骤3：通过千斤顶顶升梁体，拆除临时支座，安装永久支座，收缩千斤顶，梁体支撑在承接件上，完成第一次落梁，重复上述步骤直至落位至设计位置；步骤4，完成支座灌浆，拆除千斤顶、承接件和导梁系统，完成落梁。本申请通过合理利用桥墩顶面有限空间以及综合运用临时跨路脚手架、临时支座、千斤顶和导梁系统，在不影响桥下道路正常通行的情况下，有效地解决了大跨度、大重量、桥下施工净空不足和桥端张拉顺序受限条件下箱梁现浇、预应力张拉、落梁就位及支座安装施工。
Prestressed concrete box girder cast-in-place and girder falling construction method
一种预应力混凝土箱梁现浇、落梁施工方法
GAO PINGLI (author) / ZHANG YIN (author) / WANG LEI (author)
2023-05-16
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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