Large-span steel box girder side span folding device and method

Abstract

The invention belongs to the technical field of highway construction, and relates to a large-span steel box girder side span closing device and closing method. The large-span steel box girder side span closing device comprises an upper adjusting part arranged at the bottom of a steel box girder and an adjusting base arranged on a bottom beam and matched with the upper adjusting part; the adjustingbase can move up and down along the bottom beam, and the height of the adjusting base is larger than or equal to that of the upper adjusting part. A connecting part, a telescopic part and a rolling part are sequentially arranged at the bottom of the steel box girder from top to bottom; according to the folding device, when the steel box girder falls down, the impact force of the steel box girderon the bottom girder is reduced under the buffering effect of the telescopic parts, and damage is reduced; the steel box girders are moved through the rolling parts to be accurately positioned, the steel box girders are driven by the adjusting bases to move downwards to fall onto the bottom beams, and the steel box girders are aligned and folded with the side spans of the adjacent steel box girders. Impact force generated when the steel box girder falls is reduced, local damage to the steel box girder and the bottom girder is prevented, the steel box girder is convenient to move and accuratelypositioned, and time and labor are saved.

Description

technical field [0001] The invention belongs to the technical field of highway construction, and relates to a side-span closing device and a closing method, in particular to a large-span steel box girder side-span closing device and a closing method. Background technique [0002] In the construction of modern highway bridges, steel plate box girders are the structural form often used in engineering. In long-span cable-supported bridges, the span of steel box girders can reach hundreds of meters or even thousands of meters. During construction, multi-section steel box girders are installed. A bridge is formed on the main girder; while the steel box girder is generally connected by the roof, bottom plate, web, and transverse diaphragm, longitudinal diaphragm and stiffeners through all welding. When installing the steel box girder, use a hoist Lift the steel box girder from one end of the bridge and place it on the corresponding position on the main girder, but when the steel b...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of uneven stress caused by the damage of the steel box girder during installation and the difficulty of moving when the steel box girder is closed, the present invention provides a large-span steel box girder side span closing device and a closing method, which can reduce the time when the steel box girder falls. The impact force prevents local damage to the steel box girder and the bottom beam. When the side spans are closed, it is convenient to move the steel box girder and position it accurately, saving time and effort

Images