Fabricated steel box girder combined bridge deck slab transverse splicing structure suitable for rapid construction

Abstract

The invention discloses an assembly type steel box girder combined bridge deck slab transverse splicing structure suitable for rapid construction, and belongs to the technical field of bridge engineering, the assembly type steel box girder combined bridge deck slab transverse splicing structure comprises a plurality of transversely-widened assembly type steel box girders, each assembly type steel box girder is provided with a box girder overhanging flange, and a splicing seam is arranged between the box girder overhanging flanges of every two adjacent assembly type steel box girders; the steel box girder top plate is arranged at the upper end of the transversely-widened fabricated steel box girder; the plurality of transverse splicing plates are arranged at the upper end of the steel box girder and are arranged corresponding to the splicing seams; the steel box girder top plate welding nails are uniformly arranged at the upper end of the steel box girder top plate; the pavement layer reinforcing mesh is arranged at the upper ends of the steel box girder top plate and the transverse splice plates, and the multiple steel box girder top plate welding studs are located in the pavement layer reinforcing mesh; and the cement-based material pavement layer is poured in the pavement layer reinforcing mesh. The transverse connection strength between the assembly type steel box girders is enhanced through the balance of the shearing force of the welding studs, and transverse slippage and vertical stripping between the splice plates and the assembly type steel box girders are prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a transverse splicing structure of an assembled steel box girder composite bridge deck suitable for rapid construction. Background Art

[0002] Prefabricated steel box girder bridge is a modern bridge construction technology that prefabricates the main components of the bridge in the factory and then transports them to the construction site for assembly. This method has the advantages of fast construction speed, easy quality control, and low impact on the environment. Therefore, it is widely used in the construction of bridges across rivers, valleys or urban traffic routes.

[0003] However, in the process of transverse splicing construction of prefabricated steel box girder bridges, there are also a series of technical and operational difficulties: high precision requirements. In order to ensure the safety and durability of the bridge, the docking between the sections of steel box girders must reach extremely high precision. Any slight error may cause structural instability or failure to install correctly; complex site conditions. Factors such as the geographical environment and climatic conditions at the construction site will affect the transverse splicing. For example, wind force may affect the stability of large components during hoisting; and terrain restrictions may increase the difficulty of equipment layout; coordination and cooperation are difficult. Transverse splicing usually requires multiple professional teams (such as hoisting teams, welding workers, etc.) to work together. The degree of tacit understanding between different types of work directly affects the progress and quality of the entire project; the safety risk is high. Since it involves high-altitude operations and the operation of heavy machinery, safety accidents are prone to occur without strict safety management measures; welding quality control. For steel structures, good welding is the key to ensuring the integrity of the structure. Especially when welding in outdoor environments, weather changes will have an adverse effect on the quality of the welds, thereby affecting the overall strength and service life of the bridge. Summary of the invention

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A transverse splicing structure of an assembled steel box girder composite bridge deck suitable for rapid construction, comprising:

[0006] A plurality of transversely widened assembled steel box girders, wherein both sides of the assembled steel box girders are provided with outwardly extending flanges of the box girders, and a splicing seam is provided between the outwardly extending flanges of two adjacent assembled steel box girders;

[0007] A steel box girder top plate, wherein the steel box girder top plate is arranged at the upper end of the transversely widened assembled steel box girder;

[0008] A plurality of transverse splicing plates, which are arranged at the upper end of the steel box girder top plate and correspond one to one with the plurality of splicing seams;

[0009] A plurality of steel box girder top plate welding nails, wherein the plurality of steel box girder top plate welding nails are evenly arranged at the upper end of the steel box girder top plate except for the area covered by the transverse splicing plate;

[0010] A pavement layer steel mesh, the pavement layer steel mesh is arranged on the upper ends of the steel box girder top plate and the transverse splicing plate, and a plurality of steel box girder top plate welding nails are located in the pavement layer steel mesh;

[0011] A cement-based material pavement layer is cast in the pavement layer steel mesh to complete the transverse splicing of the assembled steel box girder bridge.

[0012] Furthermore, the transverse splicing plate is a flat steel plate, and a plurality of evenly distributed dovetail tenons are arranged on both sides of the transverse splicing plate in the length direction.

[0013] Furthermore, the dovetail tenon has two sharp-angled edges extending therefrom and is fixedly connected with transverse splicing plate welding nails.

[0014] Furthermore, the multiple dovetail tenons arranged on both sides of the length direction of the transverse splicing plate are symmetrically arranged.

[0015] Furthermore, the transverse splicing plate is cut through a whole steel plate, wherein the whole steel plate is lofted into a plurality of transverse splicing plates of the same shape according to the shape of the transverse splicing plate, and two adjacent transverse splicing plates are tightly fitted together to ensure that no steel plate is wasted after cutting.

[0016] Furthermore, before the splicing construction, the bottom surface of the transverse splicing plate and the upper surface of the steel box girder top plate located on both sides of the upper end of the splicing seam are polished and high-performance epoxy glue is applied to seal the contact interface between the transverse splicing plate and the steel box girder top plate.

[0017] Beneficial effects:

[0018] The present invention enhances the transverse connection strength between assembled steel box girders by balancing the shear force of the welding nails; at the same time, the welding nails of the steel box girder can vertically pull the concrete, so that the concrete presses the splicing plate downward to prevent the transverse slippage and vertical peeling between the splicing plate and the assembled steel box girder;

[0019] In addition, the transverse splicing plates are made of conventional steel bridge plates, which are cut from a whole piece of steel plate, and the protruding dovetail tenon parts between multiple transverse splicing plates are tightly fitted, so no steel plate is wasted after cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the cross-section diagram of the assembled steel box girder;

[0021] Figure 2 This is an enlarged view of the cross section of the assembled steel box girder;

[0022] Figure 3 This is the plan view of the top plate of the steel box girder;

[0023] Figure 4 This is the elevation view of the horizontally spliced ​​plate;

[0024] Figure 5 This is a partial enlarged view of the horizontal splicing plate;

[0025] Figure 6 Cut the plan view for the horizontally spliced ​​plate.

[0026] In the figure: 1. Assembled steel box girder box; 2. Extended flange of beam; 3. Top plate of steel box girder; 4. Paving layer of cement-based material; 5. Welding nails of top plate of steel box girder; 6. Steel mesh of paving layer; 7. Splicing seam; 8. Transverse splicing plate; 8-1. First transverse splicing plate; 8-2. Second transverse splicing plate; 8-3. Third transverse splicing plate; 8-n. Nth transverse splicing plate; 9. Welding nails of transverse splicing plate; 10. Whole steel plate. DETAILED DESCRIPTION

[0027] Example 1

[0028] refer to Figure 1 - Figure 6 , a transverse splicing structure of assembled steel box girder composite bridge deck suitable for rapid construction, comprising:

[0029] A plurality of transversely widened assembled steel box girders 1, with box girder outward flanges 2 provided on both sides of the assembled steel box girders 1, and a splicing seam 7 provided between the box girder outward flanges 2 of two adjacent assembled steel box girders 1;

[0030] A steel box girder top plate 3, which is arranged at the upper end of the transversely widened assembled steel box girder 1;

[0031] A plurality of transverse splicing plates 8, which are arranged at the upper end of the steel box girder top plate 3 and are arranged one by one corresponding to the plurality of splicing seams 7;

[0032] A plurality of steel box girder top plate welding nails 5, wherein the plurality of steel box girder top plate welding nails 5 are evenly arranged at the upper end of the steel box girder top plate 3 except for the area covered by the transverse splicing plate 8;

[0033] A pavement layer steel mesh 6, which is arranged on the upper ends of the steel box girder top plate 3 and the transverse splicing plate 8, and a plurality of steel box girder top plate welding nails 5 are located in the pavement layer steel mesh 6;

[0034] The cement-based material pavement layer 4 is poured into the pavement layer steel mesh 6 to complete the transverse splicing of the assembled steel box girder bridge.

[0035] In this embodiment, a plurality of steel box girder top plate welding studs 5 are arranged in a linear array on the upper end of the steel box girder top plate 3 .

[0036] In this embodiment, the transverse splicing plate 8 is a flat steel plate, and a plurality of evenly distributed dovetail tenons are provided on both sides of the transverse splicing plate 8 in the length direction.

[0037] Wherein, the two acute-angled edges of the dovetail tenon are fixedly connected with transverse splicing plate welding nails 9.

[0038] Specifically, the multiple dovetail tenons arranged on both sides of the length direction of the transverse splicing plate 8 are symmetrically arranged.

[0039] More specifically, before the splicing construction, the bottom surface of the transverse splicing plate 8 and the upper surface of the steel box girder top plate 3 located on both sides of the upper end of the splicing seam 7 are polished and high-performance epoxy glue is applied to seal the contact interface between the transverse splicing plate 8 and the steel box girder top plate 3.

[0040] In this embodiment, the transverse splicing plate 8 is cut by a whole steel plate 10, wherein the whole steel plate 10 is cut into a plurality of transverse splicing plates 8 of the same shape according to the shape of the transverse splicing plate 8, namely: the first transverse splicing plate 8-1, the second transverse splicing plate 8-2, the third transverse splicing plate 8-3...the nth transverse splicing plate 8-n; two adjacent transverse splicing plates 8 are tightly fitted together to ensure that no steel plate is wasted after cutting.

[0041] In order to solve the problem of poor strength and durability when the transverse splicing plate 8 and the steel box girder top plate 3 are closely connected to the glue layer, the present invention welds welding nails at the sharp-angled edges of the dovetail joints of the steel box girder top plate 3 and the transverse splicing plate 8, wherein the outermost row of welding nails on the splicing side of the steel box girder top plate 3 is located inside the overall contour line of the transverse splicing plate, specifically between two adjacent dovetail joints. After pouring the cement-based material paving layer 4, the steel box girder top plate welding nails 5 located within the overall contour line of the transverse splicing plate 8 as connecting parts are subjected to the shear force in the direction of the splicing seam between the steel box girders. The transverse splicing plate weld nails 9, as connecting parts, are subjected to shear force in the direction away from the splicing seam between the steel box girders. The opposite shear forces between the two cause the cement-based material paving layer 4 between the two to be subjected to bidirectional pressure, and the paving layer steel mesh 6 can limit the compressive damage of the cement-based material paving layer 4 between the two. In this way, the interface shear force between the transverse splicing plate 8 and the steel box girder top plate 3 is converted into a more controllable force of compression of the cement-based material of the post-cast integral paving layer and tension of the steel mesh, thereby ensuring that no interface slip occurs between the transverse splicing plate 8 and the steel box girder top plate 3.

[0042] In particular, the dovetail cutting edge of the transverse splicing plate 8 can also transmit interface shear force through the pressure-bearing effect between the cement-based material paving layer 4 within the thickness range of the steel plate, thereby providing assistance for the transverse splicing.

[0043] In particular, the out-of-plane bending resistance of the reinforced cement-based material pavement layer can prevent normal peeling of the interface between the transverse splicing plate 8 and the steel box girder top plate 3.

[0044] The transverse splicing plate 8 used in the present invention has a simple structure and is easy to process. The utilization rate of the entire steel plate is high after cutting. The assembly accuracy between the transverse splicing plate 8 and the steel box beam top plate 3 is not high. The error is adjusted and the interface is sealed by epoxy resin glue, and the construction efficiency is high.

[0045] In addition, the transverse splicing structure of the assembled steel box girder composite bridge deck suitable for rapid construction proposed by the present invention has the advantages of convenience, high efficiency, and easy construction compared with the currently commonly used methods, and is a splicing structure with broad application prospects.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A transverse splicing structure of assembled steel box girder composite bridge deck suitable for rapid construction, characterized in that: include: A plurality of transversely widened assembled steel box girders (1), wherein both sides of the assembled steel box girders (1) are provided with box girder outward flanges (2), and a splicing seam (7) is provided between the box girder outward flanges (2) of two adjacent assembled steel box girders (1); A steel box girder top plate (3), wherein the steel box girder top plate (3) is arranged on the upper end of the transversely widened assembled steel box girder (1); A plurality of transverse splicing plates (8), wherein the plurality of transverse splicing plates (8) are arranged at the upper end of the steel box girder top plate (3) and are arranged in one-to-one correspondence with the plurality of splicing seams (7); A plurality of steel box girder top plate welding nails (5), wherein the plurality of steel box girder top plate welding nails (5) are evenly arranged at the upper end of the steel box girder top plate (3) except for the area covered by the transverse splicing plate (8); A pavement layer steel mesh (6), the pavement layer steel mesh (6) being arranged on the upper ends of the steel box girder top plate (3) and the transverse splicing plate (8), and a plurality of steel box girder top plate welding nails (5) being located in the pavement layer steel mesh (6); A cement-based material pavement layer (4), wherein the cement-based material pavement layer (4) is poured into the pavement layer reinforcement mesh (6) to complete the transverse splicing of the assembled steel box girder bridge.

2. The assembled steel box girder composite bridge deck transverse splicing structure suitable for rapid construction according to claim 1 is characterized in that: The transverse splicing plate (8) is a flat steel plate, and a plurality of evenly distributed dovetail tenons are arranged on both sides of the transverse splicing plate (8) in the length direction.

3. The assembled steel box girder composite bridge deck transverse splicing structure suitable for rapid construction according to claim 2 is characterized in that: The dovetail tenon has two acute-angled edges extending therefrom and is fixedly connected with transverse splicing plate welding nails (9).

4. The assembled steel box girder composite bridge deck transverse splicing structure suitable for rapid construction according to claim 3 is characterized in that: The multiple dovetail joints arranged on both sides of the longitudinal direction of the transverse splicing plate (8) are symmetrically arranged.

5. The assembled steel box girder composite bridge deck transverse splicing structure suitable for rapid construction according to claim 4 is characterized in that: The transverse splicing plate (8) is cut by a whole steel plate (10), wherein the whole steel plate (10) is cut into a plurality of transverse splicing plates (8) of the same shape according to the shape of the transverse splicing plate (8), and two adjacent transverse splicing plates (8) are tightly fitted together to ensure that no steel plate is wasted after cutting.

6. The assembled steel box girder composite bridge deck transverse splicing structure suitable for rapid construction according to claim 1 is characterized in that: Before the splicing construction, the bottom surface of the transverse splicing plate (8) and the upper surface of the steel box girder top plate (3) located on both sides of the upper end of the splicing seam (7) are polished and high-performance epoxy glue is applied to seal the contact interface between the transverse splicing plate (8) and the steel box girder top plate (3).

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