Temporary accurate positioning device and positioning method for steel box girder hoisting

Abstract

The invention relates to a temporary accurate locating device for hoisting of a steel box girder. The device comprises two finish-rolled thread steels, two center hole jacks and two locating clamps, wherein a bottom plate, a vertical plate, which is integrated with one end of the corresponding bottom plate, and two ribbed plates, which are symmetrically arranged on the corresponding bottom plate and form grooves with the corresponding vertical plate and the corresponding bottom plate are arranged in each locating clamp, one end of each ribbed plate is connected with the corresponding vertical plate, notches of the two locating clamps are opposite, packing blocks, of which the width can meet that of joints of the steel box girder and lower parts extend out of the locating clamps, are arranged between end faces of the notches, upper alignment holes and lower alignment holes are separately formed in the two vertical plates along central vertical directions, adjusting lock nuts corresponding to the upper and lower alignment holes are separately arranged at outer sides of the two vertical plates, and one end of each finish-rolled thread steel separately penetrates through the corresponding adjusting lock nuts, the upper and lower alignment holes of the corresponding locating clamp and a center hole of the corresponding center hole jack and then is connected with an end nut. The device provided by the invention is simple in structure, low in cost and high in operability, so that the accuracy of temporary locating of the steel box girder is greatly improved. The invention further provides a temporary accurate locating method for the hoisting of the steel box girder.

Description

Technical field: [0001] The invention relates to a temporary precise positioning device and a positioning method for hoisting a steel box girder. Background technique: [0002] At present, in order to reduce the self-weight of the bridge and increase the bearing capacity of the bridge while increasing the span as much as possible, the main girder of the suspension bridge generally adopts a steel plate box girder structure. Steel box girders generally need to be hoisted and assembled at the bridge construction site. The positioning accuracy of the steel box girder is very high, including hoisting, assembling and finally installing in place. In order to ensure the construction quality and construction progress of the steel box girder, a fast and accurate temporary positioning device is needed during the hoisting process of the steel box girder to connect the steel box girder together quickly, firmly and accurately before the hoisting is completed and the ring seam is spliced....

AI Technical Summary

Problems solved by technology

In order to ensure the construction quality and construction progress of the steel box girder, the steel box girder needs a fast and accurate temporary positioning device to connect the steel box girder together quickly, firmly and accurately before the hoisting is completed and the ring seam is spliced. ;The conventional temporary positioning method generally adopts the temporary welding and clamping of small U-shaped steel plate code plates on the steel box girders on both sides, and then cuts off the code plates after the circular seam splicing is completed. The code plates must be 10~20cm each Only when it can be fixed firmly, the code board is very dense and is not conducive to the welding operation of the circular seam, which wastes materials and manpower, and the efficiency is relatively low

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