Method and steel box girder for supplementing internal weld at joint of U-rib of steel box girder and panel

A steel box girder and joint technology, applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve problems such as fatigue cracks, affecting bridge life and driving safety, fatigue cracking, etc., to extend service life, reduce maintenance costs, reduce Effects of direct and indirect losses

Active Publication Date: 2018-12-18
WUHAN LIXIN AUTOMATION TECH CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the great advantages of orthogonal special-shaped steel structures in bridge construction, more than 100 bridges with this structure have been built in my country in the past 30 years. However, due to technical reasons, in the past, they could only be welded on one side of the outer side of the U rib, which was subject to repeated alternat

Method used

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  • Method and steel box girder for supplementing internal weld at joint of U-rib of steel box girder and panel
  • Method and steel box girder for supplementing internal weld at joint of U-rib of steel box girder and panel
  • Method and steel box girder for supplementing internal weld at joint of U-rib of steel box girder and panel

Examples

Experimental program
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Effect test

Example Embodiment

[0040] Example 1

[0041] Such as Figure 1-Figure 4 As shown, the method for adding internal welds at the connection between the U rib of a steel box girder and the panel of this embodiment includes the following steps:

[0042] S1: Open a profile hole on the steel box girder of the built steel bridge to facilitate the welding system to enter the U rib;

[0043] S2, placing the welding system of the internal welding seam augmentation equipment from the profiling hole 102 in the space 400 formed by the U rib 100 and the panel 300 in the steel box girder;

[0044] S3: The welding system walks along the length of the U rib 100 while welding the U rib 100 and the panel 300 from the inner side of the U rib 100;

[0045] S4: After the welding is completed, fill in the position of the profiling hole 102, and perform anti-rust coating treatment on the filled position of the profiling hole after the filling is completed.

[0046] Among them, for different steel box girder structures, there are ...

Example Embodiment

[0047] Embodiment 1: S1 is specifically, such as Figure 1-Figure 4 As shown, one end of the U rib 100 in the steel box girder is provided with a profiling hole 102 or both ends of the U rib 100 are respectively provided with a profiling hole 102 or the panel 300 is provided with a profiling hole 102. The profiling hole can be of any shape and size to facilitate the welding system to enter the U rib. The position of the profiling hole can be flexibly selected. In order to minimize the damage to the U rib, the profiling hole can be opened as close to the end as possible to facilitate the welding system to enter the space formed between the U rib and the panel In addition, it is convenient to fill up after the welding is completed, and it does not affect other U ribs to supplement the inner weld. The position of the profiling hole can be opened on the top of the U rib or the side of the U rib.

Example Embodiment

[0048] Implementation mode two: such as Figure 1-Figure 4 As shown, when there is an end sealing plate 101 in the U rib 100, the profiling hole 102 is opened at a position where the U rib 100 is close to the end sealing plate 101, and the end sealing plate 101 Resection; when the U rib 100 has no end sealing plate 101, the profiling hole 102 is opened at any position of the U rib 100. Setting the profiling hole near the end sealing plate can facilitate the removal of the end sealing plate from the profiling hole, so that the welding system can walk into the space between the U rib and the panel.

[0049] The welding system of this embodiment adopts a gas shielded welding automatic overhead welding process. The automatic overhead welding process can ensure that the welding system is walking upwards while welding between the U rib and the panel; using gas shielded welding, compared with other welding methods, the visibility of the arc and the molten pool is better, and the weldin...

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Abstract

The invention relates to a method for supplementing an internal weld at the joint of a U rib of a steel box girder and a panel, and a steel box girder. The method comprises the following steps: S1, aprofiling hole is arranged on the steel box girder; S2, the welding system of the internal weld supplementary equipment enters the enclosed space formed by the U rib and the panel in the steel box girder from the position of the copying hole; S3, the welding system travels along the length direction of the U rib, and simultaneously welds the U rib and the panel from the inside of the U rib; S4, after the welding is completed, the position of the copying hole is filled. The invention opens a profiling hole in the steel box girder so that the welding system enters between the U rib and the panel, Adding internal weld to U-rib of existing steel bridge can strengthen the opening defects in U-rib, prolong the service life of bridge, ensure the safety of driving, increase the social and economicbenefits of bridge operation, reduce the maintenance cost of bridge, and the direct and indirect losses caused by closed traffic during the maintenance period.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a method for supplementing inner weld seams at the connection between U ribs and panels of steel box girders and the steel box girder. Background technique [0002] Due to the great advantages of orthogonal special-shaped steel structures in bridge construction, more than 100 bridges with this structure have been built in my country in the past 30 years. However, due to technical reasons, in the past, they could only be welded on one side of the outer side of the U rib, which was subject to repeated alternating loads. Fatigue cracks are likely to occur from the weld root and expand to the thickness of the panel or the direction of the weld throat. As a result, a large number of fatigue cracks occurred in the bridge of this structure within 15 years after it was opened to traffic, seriously affecting the service life of the bridge and driving safety. In view of this current situat...

Claims

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Application Information

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IPC IPC(8): E01D2/04E01D22/00B23K9/16B23K9/32
CPCB23K9/16B23K9/32E01D2/04E01D22/00
Inventor 舒先庆陈积里王成林高兴
Owner WUHAN LIXIN AUTOMATION TECH CO LTD
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