A construction method and structure for internal and external overlap of box-type steel beams

Abstract

The present invention discloses a construction method and structure for overlapping the inside and outside of a box-shaped steel beam. The present invention comprises hoisting two sections of box-shaped steel beams (1) to a required installation position, positioning and initially fixing the box-shaped steel beams at the intersection of the two sections of the box-shaped steel beams with a pre-connecting plate (3) and a high-strength bolt (4), and tightening the high-strength bolts on the connecting plate after the positions and elevations of the two sections of the box-shaped steel beams are fixed correctly. Then, the welds on both sides of the web (5) are firstly welded with a single-sided full weld; then, a sealing strip is placed to weld the bottom wing plate weld (9) with a single-sided full weld from the inside of the box-shaped steel beam; finally, a sealing strip and a cover plate (12) are placed to weld the top wing plate weld (13) with a single-sided full weld. The box-shaped steel beam in the present invention can be processed by a specialized factory. During the construction process, only the box-shaped steel beams produced by the specialized factory need to be butted, which greatly improves the construction efficiency and saves labor; and solves the structural safety problems of the prior art such as poor welding effect and insufficient weld strength.

Description

Technical Field

[0001] The invention relates to a construction method and structure for inner and outer overlap of a box-shaped steel beam, belonging to the technical field of building main body construction. Background Art

[0002] With the technological innovation and transformation and upgrading of the national construction industry, box-type steel beams have become the industry trend as structural components of large-span space buildings. In the process of box-type steel beam assembly and welding, the existing technology is prone to structural safety problems such as poor welding effect and insufficient weld strength. At the same time, the existing welding process can no longer meet the project production needs in terms of labor costs and progress requirements.

[0003] In order to effectively improve the quality and performance of steel structure buildings, effectively save production time, improve production efficiency, meet customer needs, and ensure better sustainable development of real estate companies, how to improve the integrity and safety of steel structure buildings, how to reduce the difficulty of hoisting and welding of box-type steel beams, how to ensure the welding quality of box-type steel beams, how to shorten the hoisting and welding time of box-type steel beams to meet social requirements and other issues have become the main factors affecting the development of industrialized projects. We have studied a construction method and structure for internal and external overlap of box-type steel beams. Therefore, the existing technology still has shortcomings and needs further improvement. Summary of the invention

[0004] The purpose of the present invention is to provide a construction method and structure for the internal and external overlap of a box-type steel beam, so as to effectively improve the quality and performance of a box-type steel beam structure building, effectively save production time and improve production efficiency, thereby overcoming the shortcomings of the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A construction method for inner and outer overlap of a box-shaped steel beam of the present invention is constructed according to the following steps:

[0007] a. Cut off a section of the top wing plate at the joint of the two box-shaped steel beams to be spliced, and then hoist them to the required installation location;

[0008] b. Connect the inner sides of the two webs of the two box-shaped steel beams into one piece through a pre-connecting plate and a set of high-strength bolts;

[0009] c. Weld the webs and pre-connection plates of the two box-shaped steel beams together through the web welds at the butt joints of the two webs of the two box-shaped steel beams;

[0010] d. Spot weld the bottom wing plate sealing strip at the bottom surface of the bottom wing plate butt joint of the two box-shaped steel beams, and weld the bottom wing plates and the bottom wing plate sealing strip of the two box-shaped steel beams into one through the bottom wing plate weld above the bottom wing plate sealing strip;

[0011] e. Spot weld the top wing plate sealing strip on the bottom surface of the top wing plate cutout of the two box-shaped steel beams;

[0012] f. Place the cover plate on the top wing plate sealing strips of the two box-type steel beams, and weld the two ends of the cover plate to the top wing plate and the top wing plate sealing strips through the top wing plate welds.

[0013] In the above-mentioned box-type steel beam internal and external overlap construction method, the web weld, bottom wing plate weld and top wing plate weld are all fully welded; welding grooves are provided at the weld edges at both ends of the bottom wing plate and the cover plate; after the top wing plate weld is fully welded, the top surface of the top wing plate weld is polished flat and flush with the top surface of the top wing plate.

[0014] In the aforementioned construction method for overlapping the inside and outside of a box-type steel beam, in the step b, the connection holes of the pre-connection plate and the webs of the two sections of the box-type steel beam are drilled by means of a matching drill, and are initially fixed by means of high-strength bolts, and then the position and elevation of the two sections of the box-type steel beam are adjusted. After confirmation, the high-strength bolts are tightened before the construction of step d can be carried out.

[0015] In the aforementioned construction method for overlapping the inside and outside of the box-type steel beam, in the steps d and e, the bottom wing plate sealing strip is first connected to the bottom surface of the bottom wing plate at the joint by spot welding to prevent welding deformation; the top wing plate sealing strip is first connected to the bottom surface of the top wing plate at the joint by spot welding to prevent welding deformation; after all welds are fully welded, all spot welds are filled by full welding.

[0016] A box-shaped steel beam internal and external overlap structure of the present invention, which is constructed according to the above-mentioned box-shaped steel beam internal and external overlap construction method, comprises two sections of box-shaped steel beams to be spliced; a notch is provided at the splicing place of the top wing plates of the two sections of the box-shaped steel beams; the inner sides of the two webs of the two sections of the box-shaped steel beams are connected via a pre-connecting plate and a group of high-strength bolts, and the webs and the pre-connecting plates are welded into one through the web welds; a bottom wing plate sealing strip is provided at the bottom of the bottom wing plates of the two sections of the box-shaped steel beams; the gap between the bottom wing plates of the two sections of the box-shaped steel beams and the bottom wing plate sealing strip is welded into one through the bottom wing plate welds; a cover plate is provided at the notch of the top wing plates of the two sections of the box-shaped steel beams, and a top wing plate sealing strip is provided between the cover plate and the bottom of the notch of the top wing plates; the gap between the top wing plates of the two sections of the box-shaped steel beams and the cover plate and the top wing plate sealing strip is welded into one through the top wing plate welds.

[0017] The aforementioned box-shaped steel beam internal and external overlap structure is characterized in that welding grooves are provided at the welds of the bottom wing plate, the top wing plate and the cover plate.

[0018] The aforementioned box-type steel beam internal and external overlap structure is characterized in that: the web weld, bottom wing plate weld and top wing plate weld are all full welds; wherein the top surface of the top wing plate weld is flush with the top surface of the top wing plate.

[0019] Due to the adoption of the above technical scheme, compared with the prior art, in the internal and external overlap structure of the box-type steel beam of the present invention, the box-type steel beam can be handed over to a specialized factory for further processing and production, and during the construction process, it is only necessary to butt the box-type steel beams produced by the specialized factory, which greatly improves the construction efficiency and saves labor; and solves the structural safety problems such as poor welding effect and insufficient weld strength that occur in the construction process of the prior art, as well as the problems of not being able to meet the project production needs in terms of labor cost and progress requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the construction method of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the present invention.

[0022] The markings in the figure are as follows: 1-box steel beam, 2-top wing plate, 3-pre-connection plate, 4-high-strength bolts, 5-web plate, 6-web plate weld, 7-bottom wing plate, 8-bottom wing plate sealing strip, 9-bottom wing plate weld, 10-top wing plate sealing strip, 11-spot welding, 12-cover plate, 13-top wing plate weld, 14-welding groove. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] A construction method for inner and outer overlap of a box-shaped steel beam of the present invention, as Figure 1 As shown: The method is constructed according to the following steps:

[0025] a. Cut off a section of the top wing plate 2 at the joint of two box-shaped steel beams 1 to be spliced, and then hoist them to the required installation position;

[0026] b. The inner sides of the two webs 5 of the two box-shaped steel beams 1 are connected as one by means of a pre-connecting plate 3 and a set of high-strength bolts 4; the connection holes of the pre-connecting plate 3 and the webs 5 of the two box-shaped steel beams 1 are drilled by means of a matching drill, and are initially fixed by means of high-strength bolts 4, and then the positions and elevations of the two box-shaped steel beams 1 are adjusted, and after confirmation, the high-strength bolts 4 are tightened before the next step of construction can be carried out;

[0027] c. Weld the webs 5 of the two box-shaped steel beams 1 and the pre-connecting plate 3 into one piece by welding the web welds 6 at the butt joints of the two webs 5 of the two box-shaped steel beams 1;

[0028] d. Spot weld the bottom wing plate sealing strip 8 at the bottom surface of the joint of the bottom wing plates 7 of the two box-shaped steel beams 1, and weld the bottom wing plates 7 and the bottom wing plate sealing strip 8 of the two box-shaped steel beams 1 into one through the bottom wing plate weld 9 above the bottom wing plate sealing strip 8; the bottom wing plate sealing strip 8 is first connected to the bottom surface of the joint of the bottom wing plate 7 by spot welding 11 to prevent welding deformation; and then the bottom wing plate weld 9 is constructed;

[0029] e. Spot weld the top wing sealing strip 10 on the bottom surface of the cutout of the top wing plate 2 of the two box-shaped steel beams 1; the top wing sealing strip 10 is first connected to the bottom surface of the top wing plate 2 at the joint by spot welding 11 to prevent welding deformation;

[0030] f. The cover plate 12 is placed on the top wing plate sealing strip 10 of the two box-shaped steel beams 1, and the ends of the cover plate 12 are welded to the top wing plate 2 and the top wing plate sealing strip 10 as a whole through the top wing plate weld 13.

[0031] In the aforementioned construction method of the inner and outer overlap of the box-shaped steel beam, the web weld 6, the bottom wing plate weld 9 and the top wing plate weld 13 are all welded by full welding; the weld edges at both ends of the bottom wing plate 7 and the cover plate 12 are provided with welding grooves 14; wherein after the top wing plate weld 13 is fully welded, the top surface of the top wing plate weld 13 is polished flat and flush with the top surface of the top wing plate 2. In the construction of steps d and e, the bottom wing plate sealing strip 8 is first connected to the bottom surface of the joint of the bottom wing plate 7 by spot welding 11 to prevent welding deformation; then the bottom wing plate weld 9 is constructed; the top wing plate sealing strip 10 is first connected to the bottom surface of the joint of the top wing plate 2 by spot welding 11 to prevent welding deformation; after all welds are fully welded, all spot welds 11 are filled by full welding.

[0032] A box-shaped steel beam inner and outer overlap structure of the present invention is formed according to the above-mentioned box-shaped steel beam inner and outer overlap construction method, such as Figure 2 As shown, it includes two sections of box-shaped steel beams 1 to be spliced, and a gap is provided at the splicing place of the top wing plates 2 of the two sections of box-shaped steel beams 1; the inner sides of the two webs 5 of the two sections of box-shaped steel beams 1 are connected by a pre-connecting plate 3 and a group of high-strength bolts 4, and the webs 5 and the pre-connecting plate 3 are welded together by a web weld 6; the bottom of the bottom wing plates 7 of the two sections of box-shaped steel beams 1 is provided with a bottom wing plate sealing strip 8; the gap between the bottom wing plates 7 and the bottom wing plate sealing strip 8 of the two sections of box-shaped steel beams 1 is welded together by a bottom wing plate weld 9; a cover plate 12 is provided at the gap of the top wing plates 2 of the two sections of box-shaped steel beams 1, and a top wing plate sealing strip 10 is provided at the bottom of the gap between the cover plate 12 and the top wing plate 2; the gap between the top wing plates 2 of the two sections of box-shaped steel beams 1 and the cover plate 12 and the top wing plate sealing strip 10 is welded together by a top wing plate weld 13. Welding grooves 14 are provided at the welds of the bottom wing plates 7, the top wing plates 2 and the cover plate 12. The web weld 6 , the bottom wing plate weld 9 and the top wing plate weld 13 are all full welds; wherein the top surface of the top wing plate weld 13 is flush with the top surface of the top wing plate 2 .

[0033] The specific implementation process of the present invention is as follows Figure 1 and Figure 2 As shown, two sections of box-shaped steel beams 1 to be assembled and welded are hoisted to the required installation position by using hoisting equipment or tools, the positions of the two sections of box-shaped steel beams 1 are adjusted according to the design elevation, and the pre-connection plate 3 is vertically placed on the inner side of the web 5 at the intersection of the two sections of box-shaped steel beams 1. The connection holes of the pre-connection plate 3 and the web 5 of the two sections of box-shaped steel beams 1 are drilled by matching drilling, so that the connection holes on the pre-connection plate 3 are consistent with the connection holes at the joint of the box-shaped steel beams 1 to be assembled, and then a group of high-strength bolts 4 are used to preliminarily connect the pre-connection plate 3 and the web 5 of the box-shaped steel beam 1. After the position and elevation of the two sections of box-shaped steel beams 1 are finally adjusted correctly, the high-strength bolts 4 are tightened to connect the box-shaped steel beam 1 and the pre-connection plate 3 into a whole.

[0034] After the pre-connection plate 3 is firmly connected to the box-type steel beam 1, use carbon dioxide gas shielded welding equipment to first perform single-sided full welding on the web welds 6 on both sides of the web 5; then place a bottom wing plate sealing strip 8 at the bottom of the connection of the bottom wing plate 7 of the box-type steel beam 1, and perform single-sided full welding on the bottom side joint from the inside and outside of the box-type steel beam 1; finally, place two top wing plate sealing strips 10, cover with a cover plate 12, and perform single-sided full welding on the two joints of the top wing plate 2.

[0035] In the box-type steel beam inner and outer lap joint structure of the present invention, the box-type steel beam can be handed over to a specialized factory for further processing and production. During the construction process, it is only necessary to butt the box-type steel beams produced by the specialized factory, which greatly improves the construction efficiency and saves labor. It also solves the structural safety problems such as poor welding effect and insufficient weld strength that occur in the construction process of the prior art, as well as the problems of not being able to meet the project production needs in terms of labor costs and progress requirements.

Claims

1. A construction method for inner and outer overlap of a box-shaped steel beam, characterized in that: The method is constructed according to the following steps: a. Cut off a section of the top wing plate at the joint of the two box-shaped steel beams to be spliced, and then hoist them to the required installation location; b. Connect the inner sides of the two webs of the two sections of box-shaped steel beams into one piece through a pre-connecting plate and a set of high-strength bolts; c. Weld the webs and pre-connection plates of the two box-shaped steel beams together through the web welds at the butt joints of the two webs of the two box-shaped steel beams; d. Spot weld the bottom wing plate sealing strip at the bottom surface of the bottom wing plate butt joint of the two box-shaped steel beams, and weld the bottom wing plates and the bottom wing plate sealing strip of the two box-shaped steel beams into one through the bottom wing plate weld above the bottom wing plate sealing strip; e. Spot weld the top wing plate sealing strip on the bottom surface of the top wing plate cutout of the two box-shaped steel beams; f. Place the cover plate on the top wing plate sealing strips of the two box-shaped steel beams, and weld the two ends of the cover plate to the top wing plate and the top wing plate sealing strips through the top wing plate welds; The web weld, bottom wing plate weld and top wing plate weld are all welded by full welding; welding grooves are provided at the weld edges at both ends of the bottom wing plate and the cover plate; after the top wing plate weld is fully welded, the top surface of the top wing plate weld is polished flat and flush with the top surface of the top wing plate; In the step b, the connection holes of the pre-connection plate and the webs of the two box-shaped steel beams are drilled by a matching drill, and are initially fixed by high-strength bolts, and then the positions and elevations of the two box-shaped steel beams are adjusted. After confirmation, the high-strength bolts are tightened before the construction of step d can be carried out; In the steps d and e, the bottom wing plate sealing strip is first connected to the bottom surface of the bottom wing plate joint by spot welding to prevent welding deformation; the top wing plate sealing strip is first connected to the bottom surface of the top wing plate joint by spot welding to prevent welding deformation; after all welds are fully welded, all spot welds are filled by full welding.

2. A box-shaped steel beam internal and external overlap structure constructed by the box-shaped steel beam internal and external overlap construction method according to claim 1, comprising two sections of box-shaped steel beams (1) to be spliced; characterized in that: A notch is provided at the joint of the top wing plates (2) of the two box-shaped steel beams (1); the inner sides of the two web plates (5) of the two box-shaped steel beams (1) are connected via a pre-connection plate (3) and a group of high-strength bolts (4); the web plates (5) and the pre-connection plate (3) are welded together via a web plate weld (6); a bottom wing plate sealing strip (8) is provided at the bottom of the bottom wing plates (7) of the two box-shaped steel beams (1); the bottom wing plates (7) of the two box-shaped steel beams (1) are connected to the bottom wing plates (7) of the two box-shaped steel beams (1); The gaps between the bottom wing plate sealing strips (8) are welded together via the bottom wing plate welds (9); a cover plate (12) is provided at the notch of the top wing plates (2) of the two sections of the box-shaped steel beams (1); a top wing plate sealing strip (10) is provided at the bottom of the notch between the cover plate (12) and the top wing plate (2); the top wing plates (2) of the two sections of the box-shaped steel beams (1) and the gaps between the cover plate (12) and the top wing plate sealing strip (10) are welded together via the top wing plate welds (13).

3. The structure of the inner and outer overlap of the box-shaped steel beam according to claim 2 is characterized in that: Welding grooves (14) are provided at the weld seams of the bottom wing plate (7), the top wing plate (2) and the cover plate (12).

4. The structure of the inner and outer overlapped box-shaped steel beam according to claim 2 is characterized in that: The web weld (6), the bottom wing plate weld (9) and the top wing plate weld (13) are all full welds; wherein the top surface of the top wing plate weld (13) is flush with the top surface of the top wing plate (2).

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