Main girder structure of tied arch bridge

Abstract

This utility model discloses a main beam structure for a tied arch bridge with under-bearing, comprising arch feet and a crossbeam. The arch feet are respectively located at both ends of the upper part of the crossbeam. A pier is fixed to the lower end of each arch foot, and a reinforcing frame is fixed between the pier, the arch foot, and the crossbeam. Arch ribs are provided at both the front and rear ends of the crossbeam, and the two ends of the arch ribs are fixedly connected to the arch feet. A horizontal wind brace is connected between the arch ribs. A hanger rod is connected to the front and rear ends of each horizontal wind brace, and a clearance groove is provided at the lower end of each hanger rod. A positioning rod is provided at both the upper and lower ends of the clearance groove, and the middle of the positioning rod is fixedly connected to the interior of the crossbeam. A web is provided at the lower part of the crossbeam, and two horizontal insert rods are fixedly fixed at equal intervals inside the web, with the front and rear ends of the two horizontal insert rods fixedly connected to the lower ends of the hanger rods. This utility model is easy to maintain and has excellent stability.

Description

Technical Field

[0001] This utility model relates to the field of arch bridge technology, specifically to the main beam structure of a tie-arch bridge with under-bearing structure. Background Technology

[0002] The main girder of a tied arch bridge refers to the bridge structure located below the main load-bearing structure (such as trusses, arch ribs, and main girders) of the bridge span. The main girder is situated below the bridge deck system but entirely above the bridge deck elevation. The main girder of a tied arch bridge typically employs a steel-concrete composite structure, a structural form that performs exceptionally well in long-span arch bridges. Steel-concrete composite combines the compressive strength of steel with the tensile strength of concrete, resulting in high load-bearing capacity and good stability. Therefore, the main girder structure of a tied arch bridge plays a crucial role.

[0003] The existing tied arch bridge main beam structure has some drawbacks: First, the hangers are not easy to disassemble and assemble, which leads to maintenance difficulties and increases maintenance costs and time; second, the structure is simple and has poor stability, which can easily lead to safety hazards during the use of the bridge. Utility Model Content

[0004] The purpose of this invention is to provide a main beam structure for a tied arch bridge with under-bearing structure, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a main beam structure for a tied arch bridge with a lower support, comprising an arch foot and a crossbeam. The arch foot is respectively located at both ends of the upper part of the crossbeam. A pier is fixed to the lower end of the arch foot, and a reinforcing frame is fixed between the pier, the arch foot, and the crossbeam. Arch ribs are provided at both the front and rear ends of the crossbeam, and both ends of the arch ribs are fixedly connected to the arch foot. A cross brace is connected between the arch ribs. A hanger is connected to both the front and rear ends of the cross brace, and a clearance groove is provided at the lower end of the hanger. A positioning insert is provided at both the upper and lower ends of the clearance groove, and the positioning... The middle of the insert rod is fixedly connected to the interior of the crossbeam. The lower part of the crossbeam is provided with a web, and the interior of the web is fixed with two horizontal insert rods at equal intervals. The front and rear ends of the two horizontal insert rods are fixedly connected to the lower end of the hanger rod, which strengthens the connection stability between the pier, arch foot and crossbeam. The fixed connection between the arch rib and the arch foot, the horizontal wind brace and the hanger rod improve the wind resistance and load-bearing capacity of the structure. The two positioning insert rods prevent the positioning insert rods from shifting. The web can increase the strength and rigidity of the crossbeam. The two horizontal insert rods further enhance the connection stability between the hanger rod and the crossbeam, and also make it easy to disassemble, maintain and replace the hanger rod.

[0006] Preferably, the crossbeam has cavities spaced equidistantly inside, and a pull frame is fixed inside each cavity. The cavities reduce the weight of the crossbeam and lower manufacturing costs.

[0007] Preferably, a transverse insert is fixedly fixed at equal intervals inside the web, and the front and rear ends of the transverse insert are fixedly connected to the pulling frame. The web is tightened and reinforced by the pulling frame and the transverse insert.

[0008] Preferably, both ends of the web are provided with support plates, and the lower part of the support plates is provided with a support plate. The provision of support plates and support plates increases the connection area between the web and the crossbeam, thereby improving the stability of the connection.

[0009] Preferably, one end of the support plate is fixed with a push rod, and the upper end of the push rod is fixedly connected to the support plate, thereby further enhancing the connection strength between the support plate and the support plate.

[0010] Preferably, the lower part of the support plate is provided with a limiting plate, and the interior of the limiting plate is fixedly connected to the lower end of the outside of the jacking rod. The limiting plate restricts the displacement of the jacking rod when the bridge is subjected to load.

[0011] Preferably, a connecting rod is fixed to the other end of the support plate, and the upper end of the connecting rod is fixedly connected to the support plate and the reinforcing frame respectively. The connecting rod strengthens the connection between the support plate, the support plate and the reinforcing frame, making the whole structure more stable.

[0012] Preferably, a positioning sleeve is provided at the lower part of the support plate, and the upper end of the inside of the positioning sleeve is fixedly connected to the lower end of the connecting rod. The positioning sleeve ensures the stability of the connecting rod under force, prevents it from shifting or shaking, and ensures the safe operation of the bridge.

[0013] Compared with the prior art, the advantages of this utility model are: easy to maintain and excellent stability;

[0014] (1) The crossbeam is installed in the designated position and the overall structure is supported by the pier. At the same time, the reinforcing frame is triangular, which strengthens the connection stability between the pier, arch foot and crossbeam, and ensures the overall strength and stability of the structure. The fixed connection between the arch rib and the arch foot, as well as the setting of the cross brace and the hanger, improve the wind resistance and load-bearing capacity of the structure. The setting of the two positioning rods is conducive to the positioning of the hanger and avoids the positioning rod offset. The setting of the web plate can increase the strength and stiffness of the crossbeam. At the same time, the setting of the second cross brace further enhances the connection stability between the hanger and the crossbeam. Through the cooperation of each component, the bridge can stably and safely bear a large load, and it is also easy to disassemble, maintain and replace the hanger.

[0015] (2) The setting of the support plate and the support plate increases the connection area between the web plate and the crossbeam, and improves the stability of the connection. Furthermore, the jacking rod further enhances the connection strength between the support plate and the support plate. The limiting plate restricts the displacement of the jacking rod. When the bridge is under load, the support plate, the support plate and the jacking rod can share the load, which improves the bearing capacity of the bridge. In addition, the connection rod strengthens the connection between the support plate and the support plate and the reinforcing frame, making the whole structure more stable. The positioning sleeve ensures the stability of the connection rod under force, prevents it from shifting or shaking, and ensures the safe operation of the bridge with good stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point B;

[0020] Figure 5 This is a schematic diagram of the web and support plate structure of this utility model;

[0021] In the diagram: 1. Pier; 2. Arch foot; 3. Arch rib; 4. Cross brace; 5. Hanger; 6. Crossbeam; 7. Reinforcing frame; 8. Support plate; 9. Support plate; 10. Horizontal insert rod one; 11. Horizontal insert rod two; 12. Web plate; 13. Pulling frame; 14. Positioning insert rod; 15. Clearance groove; 16. Limiting plate; 17. Pushing insert rod; 18. Positioning sleeve; 19. Connecting insert rod; 20. Cavity. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-5This utility model provides an embodiment of a tie-arch bridge main beam structure, including an arch foot 2 and a crossbeam 6. The arch foot 2 is respectively set at both ends of the upper part of the crossbeam 6. The lower end of the arch foot 2 is fixed with a pier 1, and a reinforcing frame 7 is fixed between the pier 1, the arch foot 2, and the crossbeam 6. The front and rear ends of the crossbeam 6 are provided with arch ribs 3, and the two ends of the arch ribs 3 are fixedly connected to the arch foot 2. The arch ribs 3 are connected with cross braces 4. The front and rear ends of the cross braces 4 are connected with hangers 5, and the lower end of the hangers 5 is provided with a clearance groove 15. The upper and lower ends of the clearance groove 15 are provided with positioning rods 14, and the middle of the positioning rods 14 is fixedly connected to the interior of the crossbeam 6. The lower part of the crossbeam 6 is provided with a web plate 12, and the interior of the web plate 12 is fixedly provided with second cross braces 11 at equal intervals. The front and rear ends of the second cross braces 11 are fixedly connected to the lower end of the hangers 5.

[0024] In use, the crossbeam 6 is installed in the designated position, and the overall structure is supported by the pier 1. At the same time, the reinforcing frame 7 is triangular in shape, which strengthens the connection stability between the pier 1, the arch foot 2 and the crossbeam 6, ensuring the overall strength and stability of the structure. The fixed connection between the arch rib 3 and the arch foot 2, as well as the setting of the cross brace 4 and the hanger 5, improve the wind resistance and load-bearing capacity of the structure. The setting of the two positioning rods 14 facilitates the positioning of the hanger 5 and prevents the positioning rods 14 from shifting. The setting of the web plate 12 can increase the strength and rigidity of the crossbeam 6. At the same time, the setting of the second cross brace 11 further enhances the connection stability between the hanger 5 and the crossbeam 6. Through the cooperation of various components, the bridge can stably and safely bear large loads, and it is also easy to disassemble, maintain and replace the hanger 5.

[0025] The beam 6 has cavities 20 arranged at equal intervals inside, and a pull frame 13 is fixed inside the cavity 20. The web plate 12 has horizontal insertion rods 10 fixed at equal intervals inside, and the front and rear ends of the horizontal insertion rods 10 are fixedly connected to the pull frame 13.

[0026] In use, the cavity 20 reduces the weight of the crossbeam 6, lowers the manufacturing cost, and facilitates the installation and disassembly of the pull frame 13. The web plate 12 is tightened and reinforced by the pull frame 13 and the crossbar 10.

[0027] Both ends of the web plate 12 are provided with support plates 9, and the lower part of the support plates 9 is provided with a support plate 8.

[0028] When in use, the setting of the support plate 9 and the support plate 8 increases the connection area between the web plate 12 and the crossbeam 6, and improves the stability of the connection.

[0029] One end of the support plate 8 is fixed with a push rod 17, and the upper end of the push rod 17 is fixedly connected to the support plate 9. The lower part of the support plate 8 is provided with a limiting plate 16, and the interior of the limiting plate 16 is fixedly connected to the lower end of the outside of the push rod 17.

[0030] When in use, the jacking rod 17 further enhances the connection strength between the support plate 9 and the support plate 8, and the limiting plate 16 restricts the displacement of the jacking rod 17. When the bridge is under load, the support plate 9, the support plate 8 and the jacking rod 17 can share the load together, thereby improving the load-bearing capacity of the bridge.

[0031] The other end of the support plate 8 is fixed with a connecting rod 19, and the upper end of the connecting rod 19 is fixedly connected to the support plate 9 and the reinforcing frame 7 respectively. The lower part of the support plate 8 is provided with a positioning sleeve 18, and the upper end of the inside of the positioning sleeve 18 is fixedly connected to the lower end of the connecting rod 19.

[0032] When in use, the connecting rod 19 strengthens the connection between the support plate 8, the bracket 9, and the reinforcing frame 7, making the whole structure more stable. The positioning sleeve 18 ensures the stability of the connecting rod 19 under force, preventing it from shifting or shaking, and ensuring the safe operation of the bridge.

[0033] In this embodiment, the following steps are taken: First, the crossbeam 6 is installed in the designated position, and the overall structure is supported by the pier 1. Simultaneously, the reinforcing frame 7 is triangular in shape, enhancing the connection stability between the pier 1, arch foot 2, and crossbeam 6, ensuring the overall strength and stability of the structure. The fixed connection between the arch rib 3 and arch foot 2, as well as the installation of the cross brace 4 and the hanger 5, improve the structure's wind resistance and load-bearing capacity. The two positioning rods 14 facilitate the positioning of the hanger 5, preventing offset. The web 12 increases the strength and rigidity of the crossbeam 6. Furthermore, the second cross brace 11 further enhances the connection stability between the hanger 5 and the crossbeam 6. Through the cooperation of these components, the bridge can stably and safely withstand large loads, and the hanger 5 is easy to disassemble, maintain, and replace. Additionally, the cavity 20 reduces the weight of the crossbeam 6. This design reduces manufacturing costs and facilitates the installation and disassembly of the pull frame 13. The pull frame 13 and the transverse insert 10 tighten and reinforce the web plate 12. Subsequently, the installation of the support plate 9 and the support plate 8 increases the connection area between the web plate 12 and the crossbeam 6, improving the stability of the connection. Furthermore, the jacking insert 17 further enhances the connection strength between the support plate 9 and the support plate 8, and the limiting plate 16 restricts the displacement of the jacking insert 17. When the bridge is under load, the support plate 9, the support plate 8, and the jacking insert 17 can share the load, improving the bridge's load-bearing capacity. In addition, the connecting insert 19 strengthens the connection between the support plate 8, the support plate 9, and the reinforcing frame 7, making the entire structure more stable. The positioning sleeve 18 ensures the stability of the connecting insert 19 under stress, preventing it from shifting or shaking, and ensuring the safe operation of the bridge. In summary, this structure is easy to maintain and has excellent stability.

Claims

1. A main girder structure of a through tied-arch bridge, characterized by: The structure includes an arch foot (2) and a crossbeam (6). The arch foot (2) is located at both ends of the upper part of the crossbeam (6). A pier (1) is fixed to the lower end of the arch foot (2), and a reinforcing frame (7) is fixed between the pier (1), the arch foot (2), and the crossbeam (6). Arch ribs (3) are provided at both the front and rear ends of the crossbeam (6), and both ends of the arch ribs (3) are fixedly connected to the arch foot (2). A cross brace (4) is connected between the arch ribs (3). The front and rear ends of the cross brace (4) are connected to each other. All are connected to a lifting rod (5), and the lower end of the lifting rod (5) is provided with a relief groove (15). The upper and lower ends of the relief groove (15) are provided with positioning rods (14), and the middle of the positioning rods (14) is fixedly connected to the interior of the crossbeam (6). The lower part of the crossbeam (6) is provided with a web plate (12), and the interior of the web plate (12) is fixed with horizontal rods (11) at equal intervals. The front end and rear end of the horizontal rods (11) are fixedly connected to the lower end of the lifting rod (5).

2. The through tied-arch bridge girder structure according to claim 1, characterized in that: The crossbeam (6) has cavities (20) arranged at equal intervals inside, and a pull frame (13) is fixed inside the cavity (20).

3. The main beam structure of the tied arch bridge according to claim 2, characterized in that: The web plate (12) is fixed with horizontal insert rods (10) at equal intervals inside, and the front end and rear end of the horizontal insert rods (10) are fixedly connected to the pull frame (13).

4. The main beam structure of the tied arch bridge according to claim 3, characterized in that: Both ends of the web (12) are provided with support plates (9), and the lower part of the support plate (9) is provided with a support plate (8).

5. The main beam structure of the tied arch bridge according to claim 4, characterized in that: One end of the support plate (8) is fixed with a push rod (17), and the upper end of the push rod (17) is fixedly connected to the support plate (9).

6. The main beam structure of the tied arch bridge according to claim 5, characterized in that: The lower part of the support plate (8) is provided with a limiting plate (16), and the interior of the limiting plate (16) is fixedly connected to the lower end of the outside of the push rod (17).

7. The main beam structure of the tied arch bridge according to claim 6, characterized in that: The other end of the support plate (8) is fixed with a connecting rod (19), and the upper end of the connecting rod (19) is fixedly connected to the support plate (9) and the reinforcing frame (7) respectively.

8. The main beam structure of the tied arch bridge according to claim 7, characterized in that: The lower part of the support plate (8) is provided with a positioning sleeve (18), and the upper end of the positioning sleeve (18) is fixedly connected to the lower end of the connecting rod (19).

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