Method for manufacturing a steel structure box girder

Abstract

A manufacturing method of a steel structure box girder comprises steps as follows: 1), a computer is used for controlling sizes of a cover plate, webs, lining plates of the webs, a baffle and a lining plate of the baffle for blanking; 2), spot welding lining plates are assembled on back surfaces of grooves of the webs and the baffle respectively; 3), a bottom plate and the two webs are assembled into a U shape and welded on a box girder mould; 4), the baffle is placed and welded in a U-shaped groove; 5), the cover plate is assembled and welded on the U-shaped groove; and 6), the steel box girder is subjected to shot blasting and paint spraying, and paint adopts anticorrosive paint and comprises a component A and a component B. According to the steel structure box girder manufactured with the method, materials are saved, the production efficiency is improved, the integrally formed anticorrosive paint is corrosion-resistant and wear-resistant, and the requirement for inner wall coating of the steel structure box girder is met.

Description

technical field [0001] The invention relates to the field of building steel structures, in particular to a manufacturing method of a steel structure box girder. Background technique [0002] At present, the manufacturing process of the steel structure box girder is roughly as follows: firstly, the column plate is cut with a CNC flame cutting machine, the cover plate, web plate, partition plate and baffle are cut, and the web and partition plate are beveled , the groove opening method is carbon arc gouging cutting V-shaped or K-shaped grooves, and the diaphragm is in the form of single-sided grooves and baffles around. The contact surfaces of the plates, webs and partitions need to be processed, and the baffles to be used are thicker. After the blanking is completed, straightening and correction are carried out. In order to ensure the accurate assembly of the column body, an assembly membrane needs to be prepared. The assembly sequence It is as follows: firstly, the above co...

AI Technical Summary

Problems solved by technology

[0003] Due to the large size of the components of the steel structure box girder and the large number of bolts, the assembly construction is difficult, time-consuming and laborious, which seriously affects the efficiency of on-site assembly

Since electroslag welding needs to be surrounded by two baffles, partitions and the four side walls of the box-shaped beam / column to form a sleeve shape, and the clearance requirements for the sleeve are very strict, and two thicker baffles are required , also requires low production efficiency and expensive electroslag welding equipment and special nozzles, which is easy to delay the construction period, not only increases the manufacturing cost of the product, but also is difficult, making the production efficiency low

In addition, when the thickness of the wall plate of the beam and column is below 18mm, it is not easy to weld with the current electroslag welding

Since the components are easily deformed during welding, the contact surfaces will not fit together, which will easily cause problems such as non-perpendicularity between the connected components and unqualified flatness, which will cause difficulties in subsequent construction, and once the problem is formed, it is difficult to repair and compensate

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