A prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge

Abstract

The present invention discloses a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge, which relates to the technical field of bridge construction. The present invention includes a prefabricated top plate and a prefabricated bottom plate. The prefabricated top plate is located above the prefabricated bottom plate. The prefabricated top plate is a rectangular plate structure. A first steel box installation cavity and a second steel box installation compartment are included between the prefabricated top plate and the prefabricated bottom plate. The prefabricated bottom plate is an arc-shaped plate structure. The present invention assembles the prefabricated top plate and the contact block by arranging a contact block with a second casting cavity and a prefabricated top plate with a first casting cavity, aligning the prefabricated top plate with the first casting cavity with the second casting cavity, and then pouring concrete into the first casting cavity and the second casting cavity. The concrete solidifies and forms under the support of prefabricated steel bars, thereby fixing the overall frame of the bridge body. Compared with the traditional method of using a large number of prefabricated connectors, this one-piece casting method greatly improves the overall load-bearing capacity and stability of the bridge.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge. Background Art

[0002] Prestressed concrete small box girder bridges are widely used in bridge construction because they use closed box sections. The closed thin-walled section of the small box girder has high stiffness. Its biggest advantage is its high torsional resistance. The torsional moment of inertia is about ten to dozens of times that of the corresponding T-beam. Therefore, under the action of lateral eccentric loads, the stress on each beam is more uniform than that on a T-beam, and the overall stress performance is good, especially when applied to skew bridges and curved bridges.

[0003] When building a fishbelly beam bridge, a large number of prefabricated panels are required to make the bridge frame. The frame structure of the traditional fishbelly beam bridge requires the use of a large number of external connectors. The more external connectors are used, the lower the overall support force and firmness of the bridge will be. In order to solve the above problems, a prefabricated and assembled fishbelly I-shaped prestressed steel box continuous beam bridge is designed to effectively solve the problem that the frame structure of the traditional fishbelly beam bridge requires the use of a large number of external connectors, which reduces the overall support force and firmness of the bridge. Summary of the Invention

[0004] The purpose of the present invention is to provide a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge to solve the problem that the frame structure of the traditional fish-belly beam bridge requires the use of a large number of external connectors, which reduces the overall supporting force and firmness of the bridge.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge, comprising a prefabricated top plate and a prefabricated bottom plate, wherein the prefabricated top plate is located above the prefabricated bottom plate, the prefabricated top plate is a rectangular plate structure, a first steel box installation cavity and a second steel box installation compartment are included between the prefabricated top plate and the prefabricated bottom plate, the prefabricated bottom plate is an arc-shaped plate structure, a plurality of first support columns and a second support column are fixedly connected between the prefabricated top plate and the prefabricated bottom plate, the number of the first support columns is four, the number of the second support columns is two, a contact block is fixedly connected to the upper surface of the first support column, an inner cavity is provided inside the first support column, a second casting cavity is provided on the upper surface of the contact block, a plurality of first casting cavities are provided on the upper surface of the prefabricated top plate, and the first casting cavities are provided on the upper surface of the prefabricated top plate. The casting cavity is connected with the second casting cavity and the inner cavity, and a plurality of precast steel bars are fixedly installed on the lower surface of the inner cavity. The first casting cavity, the first casting cavity and the second casting cavity are provided with a casting body, and the casting body is fixedly connected to the precast steel bars. By providing a contact block with the second casting cavity and a precast top plate with the first casting cavity, the precast top plate and the contact block are assembled by aligning the first casting cavity with the second casting cavity, and then pouring concrete into the first casting cavity and the second casting cavity. The concrete solidifies and forms under the support of the precast steel bars, thereby fixing the overall frame of the bridge body. Compared with the traditional method of using a large number of precast connecting parts, this one-piece casting method greatly improves the overall force-bearing capacity and stability of the bridge, and extends its service life.

[0007] Furthermore, a steel bar fixing frame is installed on the side surface of the prefabricated steel bar, and the steel bar fixing frame is fixedly connected to the prefabricated steel bar. A support plate is fixedly installed on the lower surface of the prefabricated base plate, and a pillar is fixedly connected to the lower surface of the support plate. A support groove is provided on the upper surface of the support plate, and the support groove is in contact with the prefabricated base plate.

[0008] Furthermore, a first connecting plate is provided between the two second supporting columns, and the first connecting plate is fixedly connected to the second supporting columns.

[0009] Furthermore, the number of the first connecting plates is two, and a longitudinal connecting plate is fixedly connected between the two first connecting plates. The first connecting plates and the longitudinal connecting plates are in the shape of an "I". By adding the "I"-shaped first connecting plates and the longitudinal connecting plates, the bearing capacity between the prefabricated top plate and the prefabricated bottom plate is improved.

[0010] Furthermore, two reinforcing ribs are fixedly connected to the lower surface of the first connecting plate, and one end of the reinforcing rib is fixedly connected to the second supporting column.

[0011] Furthermore, a rail plate is fixedly provided on the upper surface of the prefabricated base plate, and a support plate is fixedly installed on the upper surface of the rail plate, and the support plate and the rail plate are in a "T" shape.

[0012] Furthermore, a side plate is fixedly connected between the first support column and the second support column, and an arched bracket is fixedly installed on the upper surface of the side plate.

[0013] Furthermore, the number of the side panels is four, and a second connecting plate is fixedly installed between every two of the side panels. The number of the second connecting plates is four, and a first positioning plate and a second positioning plate are fixedly arranged between every two of the second connecting plates. The first positioning plate and the second positioning plate are in an "X" shape. A bent plate is fixedly installed on one side of the second support column, and the bent plate is an "L"-shaped plate structure. One side of the bent plate is in contact with the side panel. Screw holes are provided on the side panels and one side of the second support column. Fixing screws are installed inside the screw holes, and the fixing screws are threadedly engaged with the screw holes.

[0014] The present invention has the following beneficial effects:

[0015] 1. The present invention provides a contact block with a second casting cavity and a precast top plate with a first casting cavity, aligns the first casting cavity with the second casting cavity to complete the assembly of the precast top plate and the contact block, and then pours concrete into the first casting cavity and the second casting cavity. The concrete solidifies and takes shape under the support of precast steel bars, thereby fixing the overall frame of the bridge body. Compared with the traditional method of using a large number of precast connecting parts, this one-piece casting method greatly improves the overall load-bearing capacity and stability of the bridge, and extends its service life.

[0016] 2. The present invention improves the bearing capacity between the prefabricated top plate and the prefabricated bottom plate by adding an "I"-shaped first connecting plate and reinforcing ribs.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge;

[0020] Figure 2 This is a schematic diagram of the upward-looking three-dimensional structure of a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge;

[0021] Figure 3 This is the front view of a prefabricated I-shaped prestressed steel box continuous beam bridge.

[0022] Figure 4 This is a schematic diagram of the specific structure of a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge prefabricated bottom plate;

[0023] Figure 5 This is a schematic diagram of the internal structure of the first support column of a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge;

[0024] Figure 6 This is a schematic diagram of the specific structure of the reinforcement of a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge.

[0025] In the accompanying drawings, the list of components represented by each number is as follows: 1. First casting cavity; 2. Casting body; 3. Support plate; 4. Rail plate; 5. Precast bottom plate; 6. Pillar; 7. Precast top plate; 8. Support groove; 9. Contact block; 10. Support plate; 11. First support column; 12. Second support column; 13. Reinforcement rib; 14. First connecting plate; 15. Longitudinal connecting plate; 16. First positioning plate; 17. Second casting cavity; 18. Second connecting plate; 19. Side plate; 20. Arch bracket; 21. Second positioning plate; 22. First steel box installation cavity; 23. Second steel box installation cavity; 24. Inner cavity; 25. Steel bar fixing frame; 26. Precast steel bar; 27. Fixing screw; 28. Bending plate; 29. Screw hole. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] See also Figures 1-6As shown, the present invention is a prefabricated and assembled fish belly I-shaped prestressed steel box continuous beam bridge, including a prefabricated top plate 7 and a prefabricated bottom plate 5, the prefabricated top plate 7 is located above the prefabricated bottom plate 5, the prefabricated top plate 7 is a rectangular plate structure, and a first steel box installation cavity 22 and a second steel box installation bin 23 are included between the prefabricated top plate 7 and the prefabricated bottom plate 5, the prefabricated bottom plate 5 is an arc-shaped plate structure, and a plurality of first support columns 11 and a second support column 12 are fixedly connected between the prefabricated top plate 7 and the prefabricated bottom plate 5, the number of the first support columns 11 is four, and the number of the second support columns 12 is two, the upper surface of the first support column 11 is fixedly connected with a contact block 9, the interior of the first support column 11 is provided with an inner cavity 24, the upper surface of the contact block 9 is provided with a second casting cavity 17, the upper surface of the prefabricated top plate 7 is provided with a plurality of first casting cavities 1, the first casting cavities 1 The cavity 1 is connected with the second casting cavity 17 and the inner cavity 24. A number of precast steel bars 26 are fixedly installed on the lower surface of the inner cavity 24. A casting body 2 is provided inside the first casting cavity 1 and the second casting cavity 17. The casting body 2 is fixedly connected to the precast steel bars 26. By providing a contact block 9 with the second casting cavity 17 and a precast top plate 7 with the first casting cavity 1, the precast top plate 7 and the contact block 9 are assembled by aligning the first casting cavity 1 with the second casting cavity 17, and then pouring concrete into the first casting cavity 1 and the second casting cavity 17. The concrete solidifies and takes shape under the support of the precast steel bars 26, thereby fixing the overall frame of the bridge body. Compared with the traditional method of using a large number of precast connecting parts, this one-piece casting method greatly improves the overall force-bearing capacity and stability of the bridge, and extends its service life.

[0028] A steel bar fixing frame 25 is installed on the side of the prefabricated steel bar 26, and the steel bar fixing frame 25 is fixedly connected to the prefabricated steel bar 26. A support plate 10 is fixedly installed on the lower surface of the prefabricated base plate 5, and a support column 6 is fixedly connected to the lower surface of the support plate 10. A support groove 8 is provided on the upper surface of the support plate 10, and the support groove 8 is in contact with the prefabricated base plate 5.

[0029] A first connecting plate 14 is provided between the two second supporting columns 12 , and the first connecting plate 14 is fixedly connected to the second supporting columns 12 .

[0030] There are two first connecting plates 14, and a longitudinal connecting plate 15 is fixedly connected between the two first connecting plates 14. The first connecting plates 14 and the longitudinal connecting plates 15 are in the shape of an "I". By adding the "I"-shaped first connecting plates 14 and the longitudinal connecting plates 15, the bearing capacity between the prefabricated top plate 7 and the prefabricated bottom plate 5 is improved.

[0031] Two reinforcing ribs 13 are fixedly connected to the lower surface of the first connecting plate 14 , and one end of the reinforcing rib 13 is fixedly connected to the second supporting column 12 .

[0032] A rail plate 4 is fixedly provided on the upper surface of the prefabricated bottom plate 5 , and a support plate 3 is fixedly installed on the upper surface of the rail plate 4 , and the support plate 3 and the rail plate 4 are in a “T” shape.

[0033] A side plate 19 is fixedly connected between the first support column 11 and the second support column 12 , and an arched bracket 20 is fixedly mounted on the upper surface of the side plate 19 .

[0034] There are four side panels 19, and a second connecting plate 18 is fixedly installed between every two side panels 19. There are four second connecting plates 18, and a first positioning plate 16 and a second positioning plate 21 are fixedly arranged between every two second connecting plates 18. The first positioning plate 16 and the second positioning plate 21 are in an "X" shape. A bent plate 28 is fixedly installed on one side of the second support column 12. The bent plate 28 is an "L"-shaped plate structure. One side of the bent plate 28 is in contact with the side panel 19. Screw holes 29 are provided on one side of the side panel 19 and the second support column 12. Fixing screws 27 are installed inside the screw holes 29, and the fixing screws 27 are threadedly engaged with the screw holes 29.

[0035] Example:

[0036] The following is a method for using a prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge: align the first casting cavity 1 with the second casting cavity 17 to complete the assembly of the prefabricated top plate 7 and the contact block 9, and then pour concrete into the first casting cavity 1 and the second casting cavity 17. The concrete solidifies and forms under the support of the prefabricated steel bars 26, thereby fixing the overall frame of the bridge body. Compared with the traditional method of using a large number of prefabricated connecting parts, this one-piece casting method greatly improves the overall load-bearing capacity and stability of the bridge, extends its service life, and improves the load-bearing capacity between the prefabricated top plate 7 and the prefabricated bottom plate 5 by adding the "I"-shaped first connecting plate 14 and reinforcing ribs 13.

[0037] It is worth noting that in the above system embodiment, the various components included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of the various functional components are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0038] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0039] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge, comprising a prefabricated top plate (7) and a prefabricated bottom plate (5), characterized in that: The prefabricated top plate (7) is located above the prefabricated bottom plate (5). The prefabricated top plate (7) is a rectangular plate structure. A first steel box installation cavity (22) and a second steel box installation cavity (23) are included between the prefabricated top plate (7) and the prefabricated bottom plate (5). The prefabricated bottom plate (5) is an arc-shaped plate structure. A plurality of first support columns (11) and second support columns (12) are fixedly connected between the prefabricated top plate (7) and the prefabricated bottom plate (5). The number of the first support columns (11) is four, the number of the second support columns (12) is two, and the upper surface of the first support column (11) is A contact block (9) is fixedly connected, an inner cavity (24) is opened inside the first support column (11), a second casting cavity (17) is opened on the upper surface of the contact block (9), a plurality of first casting cavities (1) are opened on the upper surface of the prefabricated top plate (7), the first casting cavity (1) is connected to the second casting cavity (17) and the inner cavity (24), a plurality of prefabricated steel bars (26) are fixedly installed on the lower surface of the inner cavity (24), a casting body (2) is set inside the first casting cavity (1) and the second casting cavity (17), and the casting body (2) is fixedly connected to the prefabricated steel bars (26); A steel bar fixing frame (25) is installed on the side surface of the prefabricated steel bar (26), and the steel bar fixing frame (25) is fixedly connected to the prefabricated steel bar (26). A support plate (10) is fixedly installed on the lower surface of the prefabricated base plate (5), and a pillar (6) is fixedly connected to the lower surface of the support plate (10). A support groove (8) is provided on the upper surface of the support plate (10), and the support groove (8) is in contact with the prefabricated base plate (5); A first connecting plate (14) is provided between the two second supporting columns (12), and the first connecting plate (14) is fixedly connected to the second supporting columns (12); There are two first connecting plates (14), a longitudinal connecting plate (15) is fixedly connected between the two first connecting plates (14), and the first connecting plates (14) and the longitudinal connecting plates (15) are in an "I" shape; A rail plate (4) is fixedly provided on the upper surface of the prefabricated bottom plate (5), a support plate (3) is fixedly installed on the upper surface of the rail plate (4), and the support plate (3) and the rail plate (4) are in a "T" shape; A side plate (19) is fixedly connected between the first support column (11) and the second support column (12), and an arch bracket (20) is fixedly mounted on the upper surface of the side plate (19).

2. The prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge according to claim 1, characterized in that: Two reinforcing ribs (13) are fixedly connected to the lower surface of the first connecting plate (14), and one end of the reinforcing rib (13) is fixedly connected to the second supporting column (12).

3. The prefabricated and assembled fish-belly I-shaped prestressed steel box continuous beam bridge according to claim 1, characterized in that: The number of the side panels (19) is four, and a second connecting plate (18) is fixedly installed between every two of the side panels (19). The number of the second connecting plates (18) is four, and a first positioning plate (16) and a second positioning plate (21) are fixedly arranged between every two of the second connecting plates (18). The first positioning plate (16) and the second positioning plate (21) are in an "X" shape. A bent plate (28) is fixedly installed on one side of the second support column (12), and the bent plate (28) is an "L"-shaped plate structure. One side of the bent plate (28) contacts the side panel (19). Screw holes (29) are provided on one side of the side panel (19) and the second support column (12). Fixing screws (27) are installed inside the screw holes (29), and the fixing screws (27) are threadedly engaged with the screw holes (29).

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