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Machining method of steel plate girder

A processing method and technology of steel plate beams, applied in bridges, buildings, etc., can solve problems such as shortening the construction period, and achieve the effects of reducing welding workload, easy to ensure welding quality, and reducing costs.

Inactive Publication Date: 2019-02-22
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a processing method for steel plate girders, which efficiently increases the height of railway steel plate girders by rolling I-shaped steel girders, cutting, welding and other measures, and solves the problem of Solve the problem of fillet weld welding quality, reduce the difficulty of transportation and processing, reduce the cost, and shorten the construction period

Method used

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  • Machining method of steel plate girder
  • Machining method of steel plate girder
  • Machining method of steel plate girder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for processing steel plate girders, comprising the following steps:

[0041] Step 1: Obtain integrally rolled steel plate girder 1 through integral rolling, such as Figure 3-Figure 4 As shown, at this time, there is no fillet weld between the web plate and the flange plate of the integrally rolled steel plate girder 1, which reduces the weak link of the structure under stress.

[0042] Step 2: If Figure 5 As shown, the web of the overall rolled steel plate girder 1 is cut according to the cutting track 2 to form two unit plates 11 . Among them, such as Image 6 As shown, the cutting track 2 includes several track units 21 connected to each other, and each track unit 21 includes a high cutting line 22 and a low cutting line 23, connecting the high cutting line 22 and the low cutting line. The connection cutting line 24 of the line 23, the high cutting line 22 and the low cutting line 23 are both horizontal lines, and the lengths of the high cutting line 22 ...

Embodiment 2

[0047] The difference between this embodiment and embodiment 1 is that, as Figure 10 As shown, when cutting the web of the integrally rolled steel plate girder 1, the distance between the high cutting line 22 and the flange plate of the integrally rolled steel plate girder 1 is not equal to the low cutting line 23 distances from the flange plate of the overall rolled steel plate girder 1, i.e. D1≠D2, at this time, the purpose of the invention can also be achieved, and the steel plate girder (such as Figure 11 shown), however, at this time, the cavity is set eccentrically relative to the horizontal centerline of the steel plate girder, which may affect the overall performance and structural strength of the steel plate girder.

Embodiment 3

[0049] The difference between this embodiment and embodiment 1 is that, as Figure 12 As shown, when cutting the web of the integrally rolled steel plate girder 1, the connecting cutting line 24 is a vertical line. At this time, the processed steel plate girder with increased beam height is as follows: Figure 13 As shown, the cavity formed by it is rectangular, which can also achieve the purpose of the invention.

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Abstract

The invention discloses a machining method of a steel plate girder. The machining method of the steel plate girder comprises the following steps that an integrally-rolled steel plate girder is obtained through integral rolling; a web of the integrally-rolled steel plate girder is cut into two unit plates according to a cutting track, wherein the cutting track comprises a plurality of track units which are connected together, each track unit comprises a high cutting line, a low cutting line and a connection cutting line through which the high cutting line and the low connecting line are connected, the high cutting lines and the low connecting lines are horizontal lines, and the length of the high cutting lines is equal to that of the low cutting lines; and the two unit plates are spliced ina staggered mode, and butt welding is conducted after the high cutting lines and the low cutting lines are aligned, so that the steel plate girder with the height increased is obtained. The steel plate girder machined through the method is integrally rolled in a factory, fillet weld joints are avoided, and the force transmission performance is excellent; machining and manufacturing are convenient, transportation is convenient, and the welding quality of the weld joints can be guaranteed easily; and the length of the weld joints is reduced, steel consumption is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a method for processing steel plate girders. Background technique [0002] Steel plate girders are widely used in steel bridges and steel-concrete composite girders, especially for medium and long-span bridges, which have high requirements for the stiffness and bending resistance of the main girder, and the height of the main girder, that is, the design height of the steel girder, will reach more than 2m; However, under the existing processing technology, only steel plate girders with a girder height of less than 1.2m can be obtained by integral rolling. like Figure 1-Figure 2 As shown, steel plate girders with a beam height of 1.2m or more are formed by welding two flange plates 2 to the web 1 respectively. Such a steel plate girder includes four fillet weld structures, although the welding method can satisfy Beam height requirements, but a large number of fillet we...

Claims

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Application Information

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IPC IPC(8): E01D2/04
CPCE01D2/04
Inventor 徐昕宇曾永平陈克坚陶奇陈星宇郑晓龙杨国静苏延文董俊庞林周川江颜永逸刘力维
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD