A treatment process for butt joints of box-shaped steel beams with relatively large slenderness ratio

Abstract

The invention discloses a technique for processing a joint where box steel beams with relatively large slenderness ratios of sections are in butt joint. A rear plate is reserved on the side face for butt joint of the box steel beams, an upper flange plate and a lower flange plate are provided with dual connection lug plates and are fixedly connected by means of a connecting plate, flat welding and vertical position welding are used for positioning, so that the upper flange plate, the lower flange plate and two webs of each box steel beam are obtained, and then vertical position welding and horizontal position welding are used for welding a rear weld plate. By the adoption of the technique, the situation that potential quality hazards or defects are caused by over-head position welding occurring during installation of the box steel beams can be reasonably avoided; in addition, installation is convenient, a bolt connecting plate with holes does not need to be additionally arranged on the side face, and thus good economical benefits and good construction period benefits are obtained.

Description

technical field [0001] The invention relates to a processing technology for a butt joint of a box-shaped steel beam, in particular to a processing technology for a butt joint of a box-shaped steel beam with a relatively large section slenderness ratio. Background technique [0002] The box-shaped steel beam is composed of an upper flange plate, a lower flange plate and two webs on both sides. When two box-shaped steel beams are docked at high altitude, the processing technology for the butt joint of the box-shaped steel beam is adopted in the prior art. The rear welding plate is reserved for the upper flange plate, and the connecting plate needs to be set on the flange opening or the left and right webs and the lower wing web. Deformation situation. This method is not suitable for the butt connection of box-shaped steel beams with relatively large cross-sections, and the webs generally need to be connected with connecting plates through openings. After welding, they are rem...

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Problems solved by technology

[0002] The box-shaped steel beam is composed of an upper flange plate, a lower flange plate and two webs on both sides. When two box-shaped steel beams are docked at high altitude, the processing technology for the butt joint of the box-shaped steel beam is adopted in the prior art. The rear welding plate is reserved for the upper flange plate, and the connecting plate needs to be set on the flange opening or the left and right webs and the lower wing web. Deformation

This method is not suitable for the butt connection of box-shaped steel beams with relatively large cross-sections, and the webs generally need to be connected with connecting plates through openings. After welding, they are removed, which increases the cost and causes the loss of the web section, which is not conducive to the construction of the project. The construction quality is controlled, and the section length is relatively large. The box-shaped steel girder cannot be driven into the manhole, and the welding of the lower flange plate is difficult. There will be problems such as hidden quality or defects caused by overhead welding.

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