Steel box girder manufacturing and welding process

A welding process and technology of steel box girders, which are applied in bridges, bridge materials, bridge construction, etc., can solve the problems of large influence on geometric accuracy, large number of steel box girder segments, and large number of penetration welds, etc., to achieve convenient Tailored welding, guaranteed welding quality, and improved service life
CN112453831APending Publication Date: 2021-03-09THE 5TH ENG CO LTD OF CHINA RAILWAY 25TH BUREAU GRP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE 5TH ENG CO LTD OF CHINA RAILWAY 25TH BUREAU GRP
Publication Date
2021-03-09

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Abstract

The invention relates to a steel box girder manufacturing and welding process. The steel box girder manufacturing and welding process comprises the following steps that step 1, raw materials are pretreated; step 2, raw material blanking is carried out; step 3, steel box girder sections are manufactured; step 4, main beams are spliced; step 5, the main beams are welded; step 6, the main beams are corrected; and step 7, the steel box girder is assembled and welded on a construction site. The steel box girder manufacturing and welding process has the effects that welding deformation can be reduced, the part stress state is improved, and the box girder quality is guaranteed.
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Description

technical field

[0001] The invention relates to the technical field of steel structure bridges, in particular to a manufacturing process of a steel box girder. Background technique

[0002] Steel box girder, also known as steel plate box girder, is a commonly used structural form of long-span bridges. Generally used on bridges with large spans, it is called steel box girder because it looks like a box. In long-span cable-supported bridges, steel box girders with a span of several hundred meters or even thousands of meters are generally divided into several beam sections for manufacture and installation. The cross-section has wide and flat shape characteristics, and the aspect ratio reaches 1: 10 or so. Steel box girders are generally connected by all-welding of the top plate, bottom plate, web plate, and transverse diaphragm, longitudinal diaphragm and stiffeners. The roof is an orthotropic bridge deck composed of a cover plate and longitudinal stiffeners.

[0003] Exist...

Claims

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