Hinged protective scaffolding used in construction of viaduct crossing railway, and erecting method thereof

Abstract

The invention discloses a hinged protective scaffolding used in construction of a viaduct crossing a railway, and an erecting method thereof. The scaffolding comprises a profile steel ceiling and a side profile steel frame; the first side profile steel frame comprises a vertical telescopic stand column, and the telescopic stand column is provided with an oil cylinder used for opening the telescopic stand column; an inner side trolley is arranged at the bottom end of the first side section steel frame; the profile steel ceiling comprises telescopic girders, and the top ends of the telescopic girders are hinged to the top end of the first side profile steel frame; an outer side trolley is arranged at the bottom end of each telescopic girder; a guide transverse strip is arranged on each outerside trolley, a sliding block is matched with each guide transverse strip in a sliding mode, and a bottom lug plate of each telescopic girder is hinged to the sliding block of the corresponding outerside trolley; and a second jacking shaft seat is arranged at the top end of the second side profile steel frame. The method is characterized in that the profile steel ceiling is hinged to the first side profile steel frame and then rotates. According to the scaffolding and the erecting method thereof, when the profile steel ceiling is hoisted to cross the upper portion of the rail, a crane only provides auxiliary traction force.

Description

technical field [0001] The invention relates to the technical field of bridge construction in civil engineering, in particular to a hinged protective scaffold used for construction of bridge box girders and a method for erecting the protective scaffold when constructing viaduct bridges spanning railways. Background technique [0002] In the field of railway and municipal infrastructure projects, sometimes the following situation is encountered. A railway has already been operated in a certain area, and the traffic lines such as the subway or motorway planned by the municipality just need to pass through this area. A viaduct is erected above the railway in the lot to connect the traffic line for the passage of subways and vehicles. [0003] When constructing the viaduct box girder across the railway, it is necessary to erect a protective scaffolding for shielding and protection above the railway. This is because the railway operation has strict safety standards, and it is esp...

AI Technical Summary

Problems solved by technology

The above-mentioned split-type erection method successfully replaced the large crane with two small cranes, which avoided the inconvenience of using a large crane, but still could not avoid the risk in the process of lifting the steel roof above the railway, and with the small crane The reduction in power and specifications will inevitably weaken the lifting capacity, but the self-weight and volume of the steel ceiling are still relatively large, so there is still a hidden danger that the scaffold will touch the hook-hung railway high-voltage catenary wire during the lifting process; or the steel wire rope will accidentally break. Or when the roof is lowered, the rate of operation errors is too fast and too violent, resulting in a large collision between the roof and the side steel frame, and the above-mentioned collisions or falls all occur within the scope of the railway boundary, and once it occurs, it will inevitably damage the railway high voltage. Catenary wires or falling objects on the track may cause train interruption in the middle section and section of the high-voltage traction line network of operating trains, which obviously does not meet the safety standards and basic requirements of railway operations

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