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Method for welding and manufacturing weather-resistant suspension bridges with all welded steel structures and stiffening beams

A manufacturing method and weathering steel technology, applied in the field of steel structure manufacturing, can solve problems such as failure to meet design and use requirements, and achieve the effects of reduced manufacturing and installation accuracy, excellent quality, and simple and convenient construction

Active Publication Date: 2018-05-15
CHINA RAILWAY SHANQIAO GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no relevant information on welding material selection and welding process selection in China for reference. If the commonly used welding process is used, the design and use requirements cannot be met.

Method used

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  • Method for welding and manufacturing weather-resistant suspension bridges with all welded steel structures and stiffening beams
  • Method for welding and manufacturing weather-resistant suspension bridges with all welded steel structures and stiffening beams
  • Method for welding and manufacturing weather-resistant suspension bridges with all welded steel structures and stiffening beams

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Effect test

Embodiment 1

[0029] A welding manufacturing method of a weather-resistant all-welded steel structure stiffened beam suspension bridge, comprising the following steps:

[0030] Step 1: Make weather-resistant steel stiffened beam I-shaped members, box-shaped members, lug plate units and air nozzle units; Beveled fillet welds are welded by flux-cored CO2 gas shielded welding, and the rest of the leading welds are welded by submerged arc automatic welding; the tuyere plate unit is welded by flux-cored wire robotic automatic welding; the rest of the flat welds are semi-automatically welded by solid wire CO2 gas shielded welding Welding, vertical and supine welds are semi-automatically welded with CO2 gas protection for flux cored welds;

[0031] Step 2: After the rod is manufactured, remove surface oil, remove marks, remove splashes and other foreign objects on the rod, and then sandblast, store, and sprinkle water to accelerate corrosion;

[0032] Step 3: Assemble multiple weather-resistant s...

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Abstract

The invention discloses a method for welding and manufacturing weather-resistant suspension bridges with all welded steel structures and stiffening beams. The method has the advantages that the weather-resistant suspension bridges are welded by the aid of diversified welding materials and welding processes which are matched with weather-resistant steel, weld preheating and interpass temperatures are controlled, accordingly, the mechanical properties and the weather resistance of weld joint zones can be assuredly matched with parent metal, and coating-free service requirements of cold regions can be met; the diversified welding processes are used with one another, accordingly, the work efficiency can be greatly improved, and the construction periods can be shortened; measures such as full-cross-section weld joint position arrangement, groove designs, welding sequence control and inter-section port adjustment are adopted, accordingly, the manufacturing and mounting precision of the integral bridges can be guaranteed, and welding deformation can be reduced.

Description

technical field [0001] The invention belongs to the field of steel structure manufacturing, in particular to a welding manufacturing method of a weather-resistant all-welded steel structure stiffened beam suspension bridge. Background technique [0002] Fully welded connections have become one of the main development directions of modern steel bridges. From the perspective of strength, the fully welded connection has the characteristics of no weakening of the section; from the economic point of view, the fully welded connection does not need a large number of splicing plates and bolts, saving steel; from the perspective of landscape, the integrity of the fully welded structure is more Stronger and more beautiful, and the all-welded structure reduces the maintenance and repair work of high-strength bolts and reduces the impact on the environment. [0003] Due to the influence of manufacturing process, quality control, and personnel factors in China, the application range o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/18B23K9/235B23K33/00B23K103/04
CPCB23K9/0026B23K9/16B23K9/18B23K9/235B23K33/004
Inventor 徐向军高建忠胡广瑞田智杰贝玉成付常谊刘振刚陈英杰于洋常国光顾晓勇顾春新
Owner CHINA RAILWAY SHANQIAO GRP CO LTD
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