Bridge steel box girder aerial work operation platform and construction method thereof

Abstract

The invention discloses a bridge steel box girder aerial work operation platform and a construction method thereof. The operation platform comprises a steel pipe truss, two movable hanging racks and two winches, wherein the steel pipe truss is of a cuboid structure; the two movable hanging racks are symmetrically arranged on the left side and the right side of a steel box girder to be operated bytaking the longitudinal central line of the steel box girder to be operated as a symmetrical axis, each movable hanging rack comprises two F-shaped supports and a plurality of connecting rods, each F-shaped support comprises a main rod and two transverse rods, two vertical rods are arranged between the two transverse rods of each F-shaped support, the lower end of each vertical rod extends downwards and is lower than each lower transverse rod, and a wheel is arranged at the lower end of each vertical rod extending downwards; two upper chord main pipes of the steel pipe truss are fixedly connected with the two movable hanging racks; the two winches are arranged at a longitudinal end of the upper surface of a top plate of the steel box girder to be operated and are connected with the movablehanging racks through a steel wire rope; a bottom plate of the steel box girder to be operated is connected with two upper chord main pipes of the steel pipe truss through four inverted chains. The operation platform does not influence the traffic under the bridge, and has low cost and high utilization rate.

Description

technical field [0001] The invention relates to the technical field of building steel structure construction, in particular to a bridge steel box girder high-altitude operation platform and a construction method. Background technique [0002] In municipal traffic bridge projects, steel box girder structures are generally used in the section with large pier spans. This type of steel box girder has a large cross-section and large horizontal and vertical lengths. The construction method of assembly and overall hoisting, but sometimes for the sake of controlling engineering costs and reducing mechanical costs or when there is no on-site assembly site in some municipal road reconstruction projects, it is necessary to consider segmented hoisting and high-altitude docking Integral construction method. However, after the high-altitude hoisting of the steel box girder between the two bridge piers has been completed, when it is necessary to perform high-altitude operations such as we...

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Problems solved by technology

However, after the high-altitude hoisting of the steel box girder between the two bridge piers is completed, when it is necessary to perform high-altitude operations such as welding of the high-altitude butt joint weld of the steel box girder and painting the surface paint of the steel box girder, an operation platform needs to be set up. The traditional method It is to set up the overall scaffolding of the site, which will affect the normal vehicle traffic under the bridge, and the cost is relatively high

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