Steel box girder line type maintaining device

Abstract

The invention discloses a steel box girder line type maintaining device which comprises a bottom plate, an extension block and a movable steel pipe. A mounting seat is welded to one end of the extension block, a mounting nail is movably inserted into the mounting seat, fixing seats are symmetrically welded to the two sides of the upper surface of the bottom plate, and lifting rods are welded to the upper surfaces of the fixing seats. The upper end of each lifting rod is installed on the extension block in a threaded mode, a rotating cap is installed on each lifting rod in a threaded mode, thelower surface of the rotating cap makes contact with the upper surface of the extension block, and the movable steel pipe is movably inserted into the end, deviating from the mounting seat, of the extension block. An adjusting steel pipe is arranged on a building support, the height of the adjusting steel pipe is adjusted according to a pier top elevation and a designed pre-arching value to guarantee the line type of the steel box girder, the use precision is improved, and a construction requirement is met.

Description

technical field [0001] The invention relates to the technical field of steel box girders, in particular to a line shape maintaining device for steel box girders. Background technique [0002] Steel box girder, also known as steel plate box girder, is a commonly used structural form of long-span bridges. It is generally used on bridges with large spans. It is called a steel box girder because it looks like a box. Steel box girders are generally composed of top plates, bottom plates, webs, and diaphragms, longitudinal diaphragms, and stiffeners. connected. The roof is an orthotropic bridge deck composed of a cover plate and longitudinal stiffeners. [0003] Steel plate box girder is a structural form often used in engineering. In order to study the influence of diaphragm spacing on the distortion of simply supported steel box girder under concentrated load, by setting simply supported steel box girders with different numbers of Distortion effect and rigid torsion effect und...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a steel box girder alignment maintaining device, equipped with adjusting steel pipes on the building support, adjusting the height of the steel pipes according to the elevation of the pier top and the design pre-arch value to ensure the alignment of the steel box girder and improve the use Accuracy, the advantage of meeting the construction needs, solves the installation accuracy and bridge line control accuracy that generally require precise bridge deck elevation during the bridge erection process. If the line type and building deviation control of the steel box girder is not well controlled, it is easy to cause the bridge deck line type to be inconsistent. Fluency, thus affecting the quality of the bridge and prolonging the construction time

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