Manufacturing process of bridge deck system steel beam with transverse beams and longitudinal beams densely interspersed

Abstract

The invention relates to a manufacturing process of a bridge deck system transverse and longitudinal beam dense interpenetrating steel beam. A bridge deck system comprises a main truss upper chord, a transverse beam, a longitudinal beam and a cantilever arm. The pair of main truss upper chords are parallel to each other; the cross beams are vertically arranged between the main trusses; the longitudinal beams are parallel to the upper chord of the main truss and are vertically arranged between the adjacent cross beams; the cantilever arm is arranged on the outer side surface of the main truss upper chord; according to the invention, a latticed high-strength support bridge deck system structure formed by combining the cross beams and the longitudinal beams is adopted to replace a traditional steel box girder type structure; the longitudinal beams are densely laid between the cross beams to form a frame structure, and are finally hoisted and welded on the chord members; compared with a traditional mode that an upper chord member on a truss piece and a longitudinal and transverse beam structure are assembled and welded as a whole, deformation and stress change of the chord member can be effectively reduced; and the upper chord is firstly manufactured into the truss pieces and then is assembled on the cross beam, so that the time of aerial operation can be shortened, and the assembly efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a manufacturing process for densely interlaced steel beams on bridge decks with transverse and longitudinal beams. Background Art

[0002] Steel box girder, also called steel plate box girder, is a common structural form for long-span bridges. It is generally used on bridges with larger spans. It is called steel box girder because it looks like a box. Steel box girder is generally made of top plate, bottom plate, web plate, transverse diaphragm, longitudinal diaphragm and stiffening ribs connected by full welding.

[0003] At present, steel box girder is a type of beam bridge with large span capacity, small building height and superior overall performance. The steel box girder has a short construction period and good technical benefits. It is suitable for use on urban viaducts and can also be used on cross-sea bridges. There is a pavement structure layer above the steel box girder, and the pavement structure layer is generally a concrete layer, asphalt layer, etc. However, steel box girder bridges generally have the problem that the steel box bridge deck and the pavement structure layer are not firmly bonded, and are prone to slippage, delamination, and cracks.

[0004] The conventional approach to this situation is to increase the supporting strength of the bridge deck, and the usual way is to add partitions in the box girder. However, this intensive addition of partitions will increase processing time and increase costs, and welding partitions will reduce production efficiency. Therefore, it is necessary to design a non-box-type bridge deck structure to increase the load-bearing capacity while ensuring strength. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a manufacturing process in which the transverse and longitudinal beams of a bridge deck are densely interspersed with steel beams, which can solve the problem that the traditional bridge deck using a steel box beam structure is prone to poor supporting strength and poor bonding to the pavement structure.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a manufacturing process of densely interlaced steel beams in a bridge deck system with transverse and longitudinal beams, the bridge deck system includes a main truss upper chord, a transverse beam, a longitudinal beam and a cantilever arm; the main truss upper chord has a pair of parallel beams; the transverse beams have a plurality of beams and are vertically arranged between the main trusses; the longitudinal beams have a plurality of beams and are parallel to the main truss upper chord and vertically arranged between adjacent transverse beams; the cantilever arm is arranged on the outer side of the main truss upper chord; the innovation lies in: the specific manufacturing process is as follows: S1: Production of the main truss upper chord: The main truss upper chord includes the chord box, the crossbeam bracket and the node plate; the chord box is processed by reverse processing; first, the top plate unit assembly after cutting is positioned and welded on the tire frame, and the longitudinal stiffening ribs are vertically welded on the top plate unit after welding; secondly, the partition after cutting is vertically welded on the top plate unit according to the set position, and the bottom end of the partition accommodates the longitudinal stiffening ribs to be embedded; then, the node plate and side plates on both sides of the partition are installed, and the longitudinal stiffening ribs are first welded to the inner wall of the node plate and the side plate. Ribs, then the node plates and side plates with longitudinal stiffening ribs are welded with the side of the partition; then, the bottom plate unit components after cutting are welded, and then the longitudinal stiffening ribs are welded, hoisted onto the tire frame, and the bottom plate unit is welded to the node plate and side plates; finally, the inner partition of the crossbeam corbel is welded on the inner side of the node plate, and the corbel web and cross plate are welded on the outer side of the node plate to complete the manufacture of the crossbeam corbel; the web connecting plate with bolt holes is welded on the inner side of the node plate, and a hole group drilling template is used to drill a hole group on the node plate to realize the manufacture of the main truss upper chord; S2: Crossbeam production: The crossbeam includes a crossbeam body and a longitudinal beam bracket; the crossbeam body has an H-shaped cross section; the crossbeam body is given a 1‰ welding shrinkage in the length direction, and the other two ends are given a 15mm margin for blanking; the bottom plate, longitudinal plate and top plate of the crossbeam body are assembled and welded in sequence, and when welding the longitudinal plate, a stiffening plate is welded on the longitudinal outer side surface; the bracket web plate and the bracket stiffening plate are welded at the longitudinal beam bracket installation position on both sides of the crossbeam body to complete the production of the crossbeam; S3: Production of longitudinal beams: The longitudinal beams are box-shaped, and one end of the longitudinal beam is straight and the other end is left with a 20mm margin for cutting; the on-site butt joint groove of the longitudinal beam panel is a single-sided 20° gap of 3mm, with the groove facing upward; the on-site groove of the longitudinal beam web is a single-sided 20° gap of 3mm; S4: Fabrication of the cantilever arm: The cantilever arm is welded to the outside of the chord box; the cantilever arm is a box structure, and the cantilever arm is given 1‰ welding shrinkage in the length direction for cutting; first weld a stiffening plate on the bottom plate, and then vertically weld a pair of webs on the bottom plate; weld the front port T rib, partition and rear port T rib on the web from one end to the other end in sequence; finally weld the top plate and end sealing plate of the box body to realize the fabrication of the cantilever arm; S5: Assembly welding of the bridge deck system: fix and lay the crossbeams of each section on the frame, then weld the ends of the longitudinal beams to the adjacent crossbeams, and weld the ends of the longitudinal beams to the longitudinal beam brackets on the crossbeams to finally form an overall frame; then hoist the longitudinal beams and crossbeams forming the overall frame between the two trusses, and weld them to the inner wall of the upper chord on the trusses, and finally weld the upper cantilever arm to the outer arm of the upper chord.

[0007] Furthermore, in S1, CO2 gas shielded welding is used when welding the chord box body; Welding step 1: Weld the inner welds ① and ② of the node plate unit and the positioned top plate unit, and weld symmetrically from the middle to both ends with CO2 gas shielded welding; after the inner weld is welded, weld the outer penetration weld areas ③ and ④ at this position to 2 / 3 penetration, and weld symmetrically from the middle to both ends with CO2 gas shielded welding; Welding step 2: Weld the inner partition and the positioned top plate flat weld ⑤, CO2 gas shielded welding symmetrically from the middle to both ends; Welding step 3: Weld the inner partition plate and the node plate units on both sides vertically ⑥ and ⑦, CO2 gas shielded welding symmetrically; Welding step 4: Weld the bottom plate and the outer side welds of the node plate ⑧ and ⑨ to 2 / 3 of the penetration depth, and weld symmetrically from the middle to both ends using CO2 gas shielded welding; Welding step 5: Weld the node plate unit and the main welds ③ and ④ on the outer side of the positioned top plate by submerged arc automatic welding symmetrically; Welding step 6: Weld the main welds ⑧ and ⑨ on the outside of the bottom plate and the node plate units on both sides by submerged arc automatic welding.

[0008] The advantages of the present invention are: 1) The present invention adopts a high-strength bridge deck support structure composed of a grid of cross beams and longitudinal beams, replacing the traditional steel box beam structure; the longitudinal beams are densely laid between the cross beams to form a frame structure, which is finally hoisted and welded on the chord; this manufacturing and assembly process, compared with the traditional method of welding the upper chord on the truss piece and the longitudinal and transverse beam structure as a whole, can effectively reduce the deformation and stress change of the chord; and the method of first making the upper chord into a truss piece and then assembling it on the cross beam can reduce the time of aerial operations and improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0010] Figure 1 The present invention is a flow chart for manufacturing a bridge deck system in which transverse and longitudinal beams are densely interspersed with steel beams.

[0011] Figure 2 This is a structural diagram of a bridge deck system of the present invention in which transverse and longitudinal beams are densely interspersed with steel beams.

[0012] Figure 3 The present invention is a state diagram of the main truss upper chord production of a bridge deck system in which transverse and longitudinal beams are densely interspersed with steel beams.

[0013] Figure 4 This is a cross beam structure diagram of a bridge deck system of the present invention in which transverse and longitudinal beams are densely interspersed with steel beams.

[0014] Figure 5 This is a longitudinal beam structure diagram of a bridge deck system of the present invention in which transverse and longitudinal beams are densely interspersed with steel beams.

[0015] Figure 6 The present invention is a cantilever arm manufacturing state diagram of a bridge deck system in which transverse and longitudinal beams are densely interspersed with steel beams.

[0016] Figure 7 A main truss upper chord welding sequence diagram of a bridge deck system in which transverse and longitudinal beams are densely interspersed with steel beams according to the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figures 1 to 6 The manufacturing process of a bridge deck system with densely interlaced steel beams of transverse and longitudinal beams is shown, and the bridge deck system includes a main truss upper chord 1, a transverse beam 2, a longitudinal beam 3 and a cantilever arm 4; the main truss upper chord 1 has a pair of parallel to each other; the transverse beam 2 has a plurality of beams and is vertically arranged between the main trusses; the longitudinal beam 3 has a plurality of beams and is parallel to the main truss upper chord 1 and is vertically arranged between adjacent transverse beams 2; the cantilever arm 4 is arranged on the outer side of the main truss upper chord 1; the specific manufacturing process is as follows: S1: Production of the main truss upper chord: The main truss upper chord includes the chord box, the crossbeam bracket and the node plate; the chord box is processed by reverse processing; first, the top plate unit assembly after cutting is positioned and welded on the tire frame, and the longitudinal stiffening ribs are vertically welded on the top plate unit after welding; secondly, the partition after cutting is vertically welded on the top plate unit according to the set position, and the bottom end of the partition accommodates the longitudinal stiffening ribs to be embedded; then, the node plate and side plates on both sides of the partition are installed, and the longitudinal stiffening ribs are first welded to the inner wall of the node plate and the side plate. Ribs, then the node plates and side plates with longitudinal stiffening ribs are welded with the side of the partition; then, the bottom plate unit components after cutting are welded, and then the longitudinal stiffening ribs are welded, hoisted onto the tire frame, and the bottom plate unit is welded to the node plate and side plates; finally, the inner partition of the crossbeam corbel is welded on the inner side of the node plate, and the corbel web and cross plate are welded on the outer side of the node plate to complete the manufacture of the crossbeam corbel; the web connecting plate with bolt holes is welded on the inner side of the node plate, and a hole group drilling template is used to drill a hole group on the node plate to realize the manufacture of the main truss upper chord; S2: Crossbeam production: The crossbeam includes a crossbeam body and a longitudinal beam bracket; the crossbeam body has an H-shaped cross section; the crossbeam body is given a 1‰ welding shrinkage in the length direction, and the other two ends are given a 15mm margin for blanking; the bottom plate, longitudinal plate and top plate of the crossbeam body are assembled and welded in sequence, and when welding the longitudinal plate, a stiffening plate is welded on the longitudinal outer side surface; the bracket web plate and the bracket stiffening plate are welded at the longitudinal beam bracket installation position on both sides of the crossbeam body to complete the production of the crossbeam; S3: Production of longitudinal beams: The longitudinal beams are box-shaped, and one end of the longitudinal beam is straight and the other end is left with a 20mm margin for cutting; the on-site butt joint groove of the longitudinal beam panel is a single-sided 20° gap of 3mm, with the groove facing upward; the on-site groove of the longitudinal beam web is a single-sided 20° gap of 3mm; S4: Fabrication of the cantilever arm: The cantilever arm is welded to the outside of the chord box; the cantilever arm is a box structure, and the cantilever arm is given 1‰ welding shrinkage in the length direction for cutting; first weld a stiffening plate on the bottom plate, and then vertically weld a pair of webs on the bottom plate; weld the front port T rib, partition and rear port T rib on the web from one end to the other end in sequence; finally weld the top plate and end sealing plate of the box body to realize the fabrication of the cantilever arm; S5: Assembly welding of the bridge deck system: fix and lay the crossbeams of each section on the frame, then weld the ends of the longitudinal beams to the adjacent crossbeams, and weld the ends of the longitudinal beams to the longitudinal beam brackets on the crossbeams to finally form an overall frame; then hoist the longitudinal beams and crossbeams forming the overall frame between the two trusses, and weld them to the inner wall of the upper chord on the trusses, and finally weld the upper cantilever arm to the outer arm of the upper chord.

[0020] like Figure 7 As shown: In S1, CO2 gas shielded welding is used for welding the chord box; Welding step 1: Weld the inner welds ① and ② of the node plate unit and the positioned top plate unit, and weld symmetrically from the middle to both ends with CO2 gas shielded welding; after the inner weld is welded, weld the outer penetration weld areas ③ and ④ at this position to 2 / 3 penetration, and weld symmetrically from the middle to both ends with CO2 gas shielded welding; Welding step 2: Weld the inner partition and the positioned top plate flat weld ⑤, CO2 gas shielded welding symmetrically from the middle to both ends; Welding step 3: Weld the inner partition plate and the node plate units on both sides vertically ⑥ and ⑦, CO2 gas shielded welding symmetrically; Welding step 4: Weld the bottom plate and the outer side welds of the node plate ⑧ and ⑨ to 2 / 3 of the penetration depth, and weld symmetrically from the middle to both ends using CO2 gas shielded welding; Welding step 5: Weld the node plate unit and the main welds ③ and ④ on the outer side of the positioned top plate by submerged arc automatic welding symmetrically; Welding step 6: Weld the main welds ⑧ and ⑨ on the outside of the bottom plate and the node plate units on both sides by submerged arc automatic welding.

[0021] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A manufacturing process for densely interlacing steel beams in a bridge deck system with transverse and longitudinal beams, the bridge deck system comprising a main truss upper chord, a transverse beam, a longitudinal beam and a cantilever arm; the main truss upper chord has a pair of beams that are parallel to each other; the transverse beams have a plurality of beams that are vertically arranged between the main trusses; the longitudinal beams have a plurality of beams that are parallel to the main truss upper chord and vertically arranged between adjacent transverse beams; the cantilever arm is arranged on the outer side of the main truss upper chord; characterized in that: The specific manufacturing process is as follows: S1: Production of the main truss upper chord: The main truss upper chord includes the chord box, the crossbeam bracket and the node plate; the chord box is processed by reverse processing; first, the top plate unit assembly after cutting is positioned and welded on the tire frame, and the longitudinal stiffening ribs are vertically welded on the top plate unit after welding; secondly, the partition after cutting is vertically welded on the top plate unit according to the set position, and the bottom end of the partition accommodates the longitudinal stiffening ribs to be embedded; then, the node plate and side plates on both sides of the partition are installed, and the longitudinal stiffening ribs are first welded to the inner wall of the node plate and the side plate. Ribs, then the node plates and side plates with longitudinal stiffening ribs are welded with the side of the partition; then, the bottom plate unit components after cutting are welded, and then the longitudinal stiffening ribs are welded, hoisted onto the tire frame, and the bottom plate unit is welded to the node plate and side plates; finally, the inner partition of the crossbeam corbel is welded on the inner side of the node plate, and the corbel web and cross plate are welded on the outer side of the node plate to complete the manufacture of the crossbeam corbel; the web connecting plate with bolt holes is welded on the inner side of the node plate, and a hole group drilling template is used to drill a hole group on the node plate to realize the manufacture of the main truss upper chord; S2: Crossbeam production: The crossbeam includes a crossbeam body and a longitudinal beam bracket; the crossbeam body has an H-shaped cross section; the crossbeam body is given a 1‰ welding shrinkage in the length direction, and the other two ends are given a 15mm margin for blanking; the bottom plate, longitudinal plate and top plate of the crossbeam body are assembled and welded in sequence, and when welding the longitudinal plate, a stiffening plate is welded on the longitudinal outer side surface; the bracket web plate and the bracket stiffening plate are welded at the longitudinal beam bracket installation position on both sides of the crossbeam body to complete the production of the crossbeam; S3: Production of longitudinal beams: The longitudinal beams are box-shaped, and one end of the longitudinal beam is straight and the other end is left with a 20mm margin for cutting; the on-site butt joint groove of the longitudinal beam panel is a single-sided 20° gap of 3mm, with the groove facing upward; the on-site groove of the longitudinal beam web is a single-sided 20° gap of 3mm; S4: Fabrication of the cantilever arm: The cantilever arm is welded to the outside of the chord box; the cantilever arm is a box structure, and the cantilever arm is given 1‰ welding shrinkage in the length direction for cutting; first weld a stiffening plate on the bottom plate, and then vertically weld a pair of webs on the bottom plate; weld the front port T rib, partition and rear port T rib on the web from one end to the other end in sequence; finally weld the top plate and end sealing plate of the box body to realize the fabrication of the cantilever arm; S5: Assembly welding of the bridge deck system: fix and lay the crossbeams of each section on the frame, then weld the ends of the longitudinal beams to the adjacent crossbeams, and weld the ends of the longitudinal beams to the longitudinal beam brackets on the crossbeams to finally form an overall frame; then hoist the longitudinal beams and crossbeams forming the overall frame between the two trusses, and weld them to the inner wall of the upper chord on the trusses, and finally weld the upper cantilever arm to the outer arm of the upper chord.

2. The manufacturing process of the bridge deck transverse and longitudinal beams densely interlaced with steel beams according to claim 1, characterized in that: In S1, CO2 gas shielded welding is used for welding the chord box body; Welding step 1: Weld the inner welds ① and ② of the node plate unit and the positioned top plate unit, and weld symmetrically from the middle to both ends with CO2 gas shielded welding; after the inner weld is welded, weld the outer penetration weld areas ③ and ④ at this position to 2 / 3 penetration, and weld symmetrically from the middle to both ends with CO2 gas shielded welding; Welding step 2: Weld the inner partition and the positioned top plate flat weld ⑤, CO2 gas shielded welding symmetrically from the middle to both ends; Welding step 3: Weld the inner partition plate and the node plate units on both sides vertically ⑥ and ⑦, CO2 gas shielded welding symmetrically; Welding step 4: Weld the bottom plate and the outer side welds of the node plate ⑧ and ⑨ to 2 / 3 of the penetration depth, and weld symmetrically from the middle to both ends using CO2 gas shielded welding; Welding step 5: Weld the node plate unit and the positioned top plate outer main welds ③ and ④ by submerged arc automatic welding symmetrically; Welding step 6: Weld the main welds ⑧ and ⑨ on the outside of the bottom plate and the node plate units on both sides by submerged arc automatic welding.

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