Steel box girder construction welding process

Abstract

The invention discloses a steel box girder construction welding process. The steel box girder construction welding process comprises the following steps that 1, steel material selection is achieved: a Q345qc steel plate is selected by a user as a steel box girder main body in advance, the main body steel of the steel box girder comprises a top plate, an outer side web plate, an arc-shaped bottom plate, an outer side middle web plate, a bottom plate, a partition plate, an inner side middle web plate and an inner side web plate, and an auxiliary material steel plate selects a high-carbon steel material; auxiliary material steel plates are reinforcing rib plates, top plate vertical ribs and bottom plate vertical ribs. According to the steel box girder construction welding process, precise selection is carried out from material selection through flow matching of steel material selection, steel material pretreatment, frame gap position adjustment, frame positioning, main frame welding, welding spot and welding seam primary flaw detection, auxiliary frame welding, welding spot and welding seam secondary flaw detection, section repair welding and welding spot and welding seam three-time flaw detection; and meanwhile, the overall quality of the foundation steel material is improved, a main frame and an auxiliary frame are welded in a sectional type welding mode, flaw detection is conducted in time after each stage is completed, and the welding quality of all the stages is improved.

Description

technical field [0001] The invention relates to the technical field of steel box girders, in particular to a construction welding process for steel box girders. Background technique [0002] Steel box girder, also known as steel plate box girder, is a common structural form of long-span bridges. It is generally used on bridges with large spans. It is called steel box girder because it looks like a box. The characteristics of steel box girder: In span cable-supported bridges, the steel box main girder has a span of hundreds of meters to thousands of meters, and is generally divided into several beam sections for manufacture and installation. Its cross-section has wide and flat shape characteristics, and its aspect ratio reaches 1:10. about. [0003] In the construction of large-scale infrastructure facilities such as bridges and cross-bridge expressways, steel box girders are required. However, steel box girders are manufactured by welding multiple steel plate parts, and the...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of construction welding process of steel box girder, to solve the welding process used in the construction welding process of the existing steel box girder proposed in the above-mentioned background technology, the welding precision and the quality of welding seam welding spot are not ideal question

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