Method for installing bridge girder erection machine at tunnel exit: Fid-Bau Portal

Method for installing bridge girder erection machine at tunnel exit

SONG CHAO / LIU YONGSONG / DONG JIANZHAO / LIU BO / ZHANG RUYUAN / YANG FENG

The invention relates to the technical field of road construction and particularly relates to a method for installing a bridge girder erection machine at a tunnel exit. The method comprises the following steps of completing construction of a tunnel and a roadbed, a bridge abutment and a bridge pier at the tunnel exit; the bridge girder erection machine is disassembled, and a middle support assembly, a rear support assembly, a hoisting crown block, a transverse moving wheel box and a transverse moving rail are disassembled and transferred to a tunnel exit to be temporarily stacked; the girder transporting trolley is used for transporting the girder from the tunnel entrance to the tunnel exit; the middle supporting assembly and the rear supporting assembly drive the main beam to move forwards until the front supporting leg reaches the position, above the transverse moving wheel box, of the pier; and the position of the main beam is finely adjusted, so a bottom flange of the front supporting leg is aligned with and abuts against a top flange of the transverse moving wheel box, a corresponding fastener between the front supporting leg and the transverse moving wheel box is installed, and installation of the main beam is completed. The method is advantaged in that difficulty and complexity of mounting the bridge girder erection machine can be reduced, and construction cost is reduced.

本发明涉及道路施工技术领域，尤其涉及一种隧道出口处安装架桥机的方法，其包括如下步骤：完成隧道及其出口处路基、桥台、桥墩的施工；对架桥机进行解体，将中托总成、后托总成、起重天车、横移轮箱和横移轨道拆下，并转运至隧道出口处临时堆放；利用运梁台车将主梁从隧道进口处运输至隧道出口处；所述中托总成和所述后托总成驱动所述主梁向前移动，直至前支腿达到桥墩处的所述横移轮箱的上方；微调所述主梁的位置，使所述前支腿的底部法兰与所述横移轮箱的顶部法兰对正、抵靠，安装所述前支腿与所述横移轮箱间的相应紧固件，完成所述主梁的安装。本发明能够降低安装架桥机的难度和复杂度，降低施工成本。

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