Multi-layer combined structure of steel-concrete hybrid girder bridge box girder

Abstract

The utility model discloses a kind of multilayer combination structures of steel-concrete composite beam bridge box girder, including bottom plate, outer box, inner box and web, the outer box is connected on the bottom plate by fastener, the inner box inside is provided with several limit plates, several limit slots are cooperatively provided on the web, the limit slot end portion is circular, the web is provided with through slot, the through slot is provided with reinforcing plate, the inner box both sides are provided with extension plate, reinforcing rib is further provided between the extension plate and inner box, several mounting holes for connecting outer box are further provided on the extension plate, several the web is fixedly provided with connecting plate, support rod is further fixedly installed on the connecting plate top, the firm connection between steel and concrete is realized, effectively avoid the problems such as slippage, cracking, improve the structural safety of bridge, the synergistic performance between multilayer structure is significantly improved, so that the overall stress performance of box girder is more excellent.

Description

Technical Field

[0001] This utility model relates to the field of hybrid beam bridge box girder technology, specifically a multi-layer composite structure of a steel-concrete hybrid beam bridge box girder. Background Technology

[0002] In bridge construction, steel-concrete hybrid beam bridges combine the advantages of steel and concrete structures, featuring light weight, high strength, and convenient construction, and have been widely used. As the main load-bearing component of steel-concrete hybrid beam bridges, the rationality of the box girder's construction directly affects the overall performance and service life of the bridge. Existing steel-concrete hybrid beam bridge box girder structures still have some shortcomings in terms of load-bearing capacity, fatigue resistance, and construction convenience. For example, the connection between steel and concrete is not strong enough, easily leading to slippage and cracking, affecting the structural safety of the bridge; the synergistic performance between multiple layers needs improvement, resulting in poor overall load-bearing performance of the box girder. Therefore, this paper designs a multi-layer composite structure for steel-concrete hybrid beam bridge box girders to solve the above problems. Utility Model Content

[0003] The purpose of this utility model is to provide a multi-layer composite structure for a steel-concrete hybrid beam bridge box girder to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer composite structure for a steel-concrete hybrid beam bridge box girder, comprising a bottom plate, an outer box body, an inner box body, and a web plate. The outer box body is connected to the bottom plate by fasteners. Several limiting plates are provided on the inner side of the inner box body. Several limiting grooves are provided on the web plate, with the ends of the limiting grooves being circular. A through groove is provided in the web plate, and a reinforcing plate is provided in the through groove. Extension plates are provided on both sides of the inner box body. Reinforcing ribs are also provided between the extension plates and the inner box body. Several mounting holes for connecting the outer box body are also provided on the extension plates. Connecting plates are fixedly provided between several web plates, and a support rod is fixedly installed on the top of the connecting plate.

[0005] Preferably, the limiting plate has a rectangular structure, and the width and height of the limiting plate are both smaller than the width and height of the limiting groove.

[0006] Preferably, the extension plate is welded to the inner box side plate.

[0007] Preferably, the gap between the base plate and the outer casing is filled with vibration damping blocks.

[0008] Preferably, the web is trapezoidal and the connecting plate is triangular.

[0009] Preferably, both the inner and outer casings are made of high-strength steel plates, and the base plate is made of concrete.

[0010] Preferably, both the inner and outer casings have anti-slip textures on their surfaces.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] The multi-layered composite structure of the steel-concrete hybrid girder bridge achieves a robust connection between steel and concrete through the rational arrangement of components such as the bottom plate, outer box girder, inner box girder, and web, as well as structures such as limiting plates, limiting grooves, reinforcing plates, extension plates, stiffeners, mounting holes, connecting plates, and support rods. This effectively avoids slippage and cracking, thus improving the structural safety of the bridge. Simultaneously, the synergistic performance between the multi-layered structures is significantly enhanced, resulting in superior overall load-bearing capacity of the box girder. This structure also boasts advantages such as simple structure, convenient construction, high load-bearing capacity, and good fatigue resistance, making it suitable for bridge construction in various complex environments. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of a multi-layer composite structure of a steel-concrete hybrid beam bridge box girder in this embodiment;

[0015] Figure 2 This is a schematic diagram of the internal structure of the box in this embodiment;

[0016] Figure 3 This is a schematic diagram of the web structure in this embodiment.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Base plate; 2. Outer housing; 3. Inner housing; 4. Web plate; 5. Limiting plate; 6. Limiting groove; 7. Through groove; 8. Reinforcing plate; 9. Extension plate; 10. Reinforcing rib; 11. Mounting hole; 12. Connecting plate; 13. Support rod; 14. Vibration damping block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a multi-layer composite structure of a steel-concrete composite beam bridge box girder, including a bottom plate 1, an outer box 2, an inner box 3, and a web 4. The outer box 2 is connected to the bottom plate 1 by fasteners. Several limiting plates 5 are provided on the inner side of the inner box 3. Several limiting grooves 6 are provided on the web 4, and the ends of the limiting grooves 6 are circular. A through groove 7 is provided in the web 4, and a reinforcing plate 8 is provided in the through groove 7. Extension plates 9 are provided on both sides of the inner box 3. A reinforcing rib 10 is also provided between the extension plate 9 and the inner box 3. Several mounting holes 11 for connecting the outer box 2 are also provided on the extension plate 9. A connecting plate 12 is fixedly provided between several web plates 4, and a support rod 13 is fixedly installed on the top of the connecting plate 12.

[0021] Specifically, the limiting plate 5 has a rectangular structure, and the width and height of the limiting plate 5 are smaller than the width and height of the limiting groove 6. Through the above settings, the limiting plate 5 can be smoothly inserted into the limiting groove 6. Furthermore, since the end of the limiting groove 6 is round, it is convenient for the limiting plate 5 to rotate and adjust within the limiting groove 6, thus improving the flexibility during installation.

[0022] Specifically, the extension plate 9 is welded to the side plate of the inner box 3. This design makes the connection between the extension plate 9 and the inner box 3 more robust, enhancing the stability of the overall structure. Meanwhile, the mounting holes 11 on the extension plate 9 facilitate precise connection with the outer box 2, improving the convenience and accuracy of box girder assembly.

[0023] Specifically, the gap between the base plate 1 and the outer casing 2 is filled with vibration damping blocks 14. This arrangement makes the connection between the base plate 1 and the outer casing 2 more stable, and effectively reduces the vibration generated during bridge use, improving the bridge's durability and safety. The vibration damping blocks 14 can be made of elastic materials such as rubber and polyurethane, which have good damping effect and durability. The vibration damping blocks 14 also prevent direct contact between the base plate 1 and the outer casing 2, avoiding noise and wear caused by friction, and further extending the bridge's service life.

[0024] Specifically, the web 4 is trapezoidal, and the connecting plate 12 is triangular. This design makes the structure of the web 4 and connecting plate 12 more stable, effectively resisting the horizontal and vertical forces generated during bridge use, thus improving the bridge's load-bearing capacity and stability. At the same time, the trapezoidal web 4 and triangular connecting plate 12 design optimizes the stress distribution of the bridge, making the overall bridge structure more rational, reducing material usage, and lowering the bridge's construction cost.

[0025] Specifically, both the inner box girder 3 and the outer box girder 2 are made of high-strength steel plates, while the bottom plate 1 is made of concrete. This design gives the box girder an excellent overall strength and rigidity, enabling it to withstand large loads and deformations, thus ensuring the safety and stability of the bridge. The high-strength steel plates of the inner box girder 3 and outer box girder 2 provide good bending and shear resistance, effectively resisting various forces generated during bridge use and improving the overall load-bearing capacity of the bridge. The concrete bottom plate 1 has excellent compressive strength, capable of withstanding the pressure generated by the bridge's own weight and vehicle loads, further enhancing the bridge's stability.

[0026] Specifically, both the inner box 3 and the outer box 2 have anti-slip textured surfaces. This design increases the friction of the contact surfaces when the inner box 3 and outer box 2 are connected to other components, preventing loosening due to slippage and improving the reliability and safety of the box girder connection. The anti-slip textured design also increases the surface roughness of the box girder, enhancing its anti-slip performance.

[0027] A specific application example of this embodiment is as follows:

[0028] In use, the device is first fixedly installed on the pier or other supporting structure, and then the outer casing 2 is connected to the base plate 1 with fasteners. Next, the inner casing 3 is placed in the predetermined position and initially positioned by the engagement of the limiting plate 5 with the limiting groove 6 on the web plate 4. At this point, the position of the inner casing 3 can be adjusted as needed. Since the end of the limiting groove 6 is round, the limiting plate 5 can rotate flexibly within the limiting groove 6, thus facilitating the adjustment of the angle and position of the inner casing 3. After adjustment, the mounting holes 11 on the extension plate 9 are aligned with the corresponding holes on the outer casing 2, and the inner casing 3 and the outer casing 2 are firmly connected with fasteners. During the connection process, the vibration damping block 14 effectively reduces the vibration between the base plate 1 and the outer casing 2, improving the durability and safety of the bridge. At the same time, the high-strength steel plate inner casing 3 and outer casing 2, as well as the concrete base plate 1, ensure the strength and rigidity of the overall bridge structure. Finally, the connection plate 12 and support rod 13 further enhance the load-bearing capacity and stability of the bridge. During use, the design of the trapezoidal web 4 and the triangular connecting plate 12 can optimize the stress distribution of the bridge, reduce the amount of material used, and lower the bridge construction cost. Meanwhile, the anti-slip texture on the surfaces of the inner box 3 and the outer box 2 can increase the reliability of the connection and prevent the connection from loosening due to slippage.

[0029] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that modifications may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite structure for a steel-concrete hybrid beam bridge box girder, characterized in that: The device includes a base plate (1), an outer casing (2), an inner casing (3), and a web plate (4). The outer casing (2) is connected to the base plate (1) by fasteners. Several limiting plates (5) are provided on the inner side of the inner casing (3). Several limiting grooves (6) are provided on the web plate (4). The ends of the limiting grooves (6) are circular. A through groove (7) is provided in the web plate (4). A reinforcing plate (8) is provided in the through groove (7). Extension plates (9) are provided on both sides of the inner casing (3). A reinforcing rib (10) is also provided between the extension plate (9) and the inner casing (3). Several mounting holes (11) for connecting the outer casing (2) are also provided on the extension plate (9). A connecting plate (12) is fixedly provided between several web plates (4). A support rod (13) is fixedly installed on the top of the connecting plate (12).

2. The multi-layer composite structure of a steel-concrete hybrid beam bridge box girder according to claim 1, characterized in that: The limiting plate (5) is a rectangular structure, and the width and height of the limiting plate (5) are both smaller than the width and height of the limiting groove (6).

3. The multi-layer composite structure of a steel-concrete hybrid beam bridge box girder according to claim 1, characterized in that: The extension plate (9) is welded to the side plate of the inner box (3).

4. The multi-layer composite structure of a steel-concrete hybrid beam bridge box girder according to claim 1, characterized in that: The gap between the base plate (1) and the outer casing (2) is filled with vibration damping blocks (14).

5. The multi-layer composite structure of a steel-concrete hybrid beam bridge box girder according to claim 1, characterized in that: The web plate (4) is trapezoidal, and the connecting plate (12) is triangular.

6. The multi-layer composite structure of a steel-concrete hybrid beam bridge box girder according to claim 1, characterized in that: The inner box (3) and the outer box (2) are both made of high-strength steel plates, and the bottom plate (1) is made of concrete.

7. The multi-layer composite structure of a steel-concrete hybrid beam bridge box girder according to claim 1, characterized in that: The surfaces of both the inner box (3) and the outer box (2) are provided with anti-slip textures.

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