Fabricated new and old bridge widening connecting structure

Abstract

The utility model relates to the technical field of bridge engineering, and provides an assembly type new and old bridge widening connecting structure which is arranged between a new bridge and an old bridge and comprises a T-shaped section beam arranged between an old bridge flange of the old bridge and a new bridge flange of the new bridge, and a gap used for containing the T-shaped section beam is reserved between the old bridge flange and the new bridge flange. Connecting layers are arranged at the connecting positions between the T-shaped section beam and the old bridge flange and between the T-shaped section beam and the new bridge flange, the bottom of the T-shaped section beam penetrates through a gap between the old bridge flange and the new bridge flange and then is provided with a damping assembly, a triangular steel truss is arranged at the bottom of the damping assembly, and the two ends of the bottom of the triangular steel truss are connected with beam supports. The beam supports are arranged on the side faces, close to each other, of the old bridge and the new bridge. The top of a new bridge and the top of an old bridge can be connected into a whole, passing is facilitated, the buffering effect can be achieved when the bridge bears loads, it is guaranteed that the joint of the new bridge and the old bridge is well stressed, and safety is better.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, specifically to a prefabricated bridge widening and connection structure. Background Technology

[0002] The technology of widening existing bridges is primarily driven by the urgent need for increased bridge capacity due to growing traffic volume. With rapid economic development, the original bridge design standards can no longer meet the ever-increasing traffic flow, leading to problems such as traffic congestion and low transportation efficiency. To solve these problems and improve road capacity and safety, bridge widening has become an effective method of bridge reconstruction.

[0003] From a sustainable development perspective, widening existing bridges, compared to building new bridges, can maximize the conservation of land resources and construction costs, while avoiding the environmental pollution and resource waste caused by large-scale demolition of old bridges, thus aligning with environmental protection principles. However, widening old and new bridges faces numerous challenges, such as structural differences between the two, concrete shrinkage and creep, and uneven foundation settlement, requiring the coordination of deformation and structural safety between the old and new bridges.

[0004] Therefore, in order to address the above problems, a prefabricated bridge widening and connection structure is proposed to solve these problems. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by developing a prefabricated bridge-to-bridge connection structure. This invention can connect the top of the new bridge to the top of the old bridge as one unit, facilitating passage and providing a buffering effect when the bridge is under load, ensuring good stress distribution at the connection between the new and old bridges and improving safety.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A prefabricated bridge-to-bridge connection structure is installed between a new bridge and an old bridge. It includes a T-shaped cross-section beam positioned between the old bridge flange and the new bridge flange, with a gap between the old and new bridge flanges to accommodate the T-shaped cross-section beam. A connecting layer is provided at the connection point between the T-shaped cross-section beam and the old and new bridge flanges. A damping component is installed at the bottom of the T-shaped cross-section beam, penetrating the gap between the old and new bridge flanges. A triangular steel truss is installed at the bottom of the damping component, with beam supports connected to both ends of the bottom of the triangular steel truss. The beam supports are located on the sides of the old and new bridges that are close to each other.

[0008] Preferably, the T-section beam includes a flange plate and a wet joint plate. The wet joint plate is located in the middle of the bottom side of the flange plate. The bottom of the flange plate is used to connect with the connecting layer, and the two sides of the wet joint plate are used to connect the sides of the old bridge flange and the new bridge flange.

[0009] Preferably, the connecting layer is made of resin-elastic concrete, with a thickness sufficient to ensure that the upper surface of the flange plate is on the same plane as the upper surface of the old bridge flange and the new bridge flange.

[0010] As a preferred option, the wet joint slab is made of reinforced concrete.

[0011] Preferably, the damping assembly includes a damping spring, a telescopic inner sleeve, and a telescopic outer sleeve, with the telescopic inner sleeve and the telescopic outer sleeve slidingly connected to each other. The damping spring is coaxially disposed inside the telescopic inner sleeve, and its two ends are respectively connected to the telescopic inner sleeve and the telescopic outer sleeve.

[0012] Preferably, the top of the telescopic inner sleeve is provided with an upper connecting plate for connecting the wet joint plate, and the bottom of the telescopic outer sleeve is provided with a lower connecting plate for connecting the triangular steel truss. Bolt holes are provided on both the upper and lower connecting plates for installing connecting bolts.

[0013] As a preferred embodiment, the triangular steel truss includes I-beams and gusset plates. The I-beams form an isosceles triangle, and the ends of adjacent I-beams are connected by gusset plates. Several through holes are provided on the gusset plates corresponding to the positions of the I-beams for connecting bolts.

[0014] Preferably, a truss connection plate is provided on the node plate at the top of the triangular steel truss, and a round hole is provided on the truss connection plate corresponding to the bolt hole on the lower connection plate for connecting the damping component through the connecting bolt. Angle connection plates are provided on the node plates at both ends of the bottom of the triangular steel truss, and connection holes are provided on the angle connection plates for connecting the beam support.

[0015] Preferably, the beam support includes a fixed plate, a support plate, and a rib. The fixed plate and the support plate are connected in an L-shape. The rib is located between the fixed plate and the support plate, and the surface of the rib is perpendicular to the surfaces of both the fixed plate and the support plate. Several high-strength bolts are provided on both the fixed plate and the support plate. The high-strength bolts on the fixed plate are used to connect the sides of the old bridge or the new bridge, and the high-strength bolts on the support plate are used to connect the corner connecting plates.

[0016] As a preferred option, multiple triangular steel trusses are evenly arranged along the length of the bridge.

[0017] The effects provided in the utility model description are merely those of the embodiments, and not all the effects of the utility model. The above technical solution has the following advantages:

[0018] This invention utilizes a T-shaped cross-section beam at the connection between a new and an old bridge to connect the joints, thus integrating the two bridges into a unified whole. This ensures the beam surfaces of both bridges are on the same plane with a more uniform transition, resulting in better connection stability. The addition of a resin-elastic concrete connecting layer and a wet joint plate enhances the deformation capacity of the joint under load, preventing rigid deformation that could lead to breakage and improving bending resistance and safety. Furthermore, the inclusion of vibration damping components reduces vibration at the connection point, improving the stability of the T-shaped cross-section beam under vibration and preventing structural damage, thus enhancing overall stability. Finally, a triangular steel truss further supports the T-shaped cross-section beam at the joint and evenly distributes the force to the box girders of both the new and old bridges, further improving the stability and safety of the support structure. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a front view schematic diagram of the overall installation of an embodiment of the present utility model;

[0021] Figure 2 This is a front view structural diagram of the T-shaped cross-section beam according to an embodiment of the present utility model;

[0022] Figure 3 This is a partial cross-sectional view of the shock-absorbing component according to an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the triangular steel truss structure according to an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the beam support structure according to an embodiment of the present utility model.

[0025] In the diagram, 1. Old bridge flange; 2. New bridge flange; 3. T-section beam; 4. Resin elastic concrete; 5. Vibration damping component; 6. Triangular steel truss; 7. Beam support; 8. Node plate; 9. Circular hole; 10. Truss connection plate; 11. Corner connection plate; 12. Connection hole; 13. I-beam; 14. Flange plate; 15. Wet joint plate; 16. Bolt hole; 17. Upper connection plate; 18. Damping spring; 19. Telescopic inner sleeve; 20. Telescopic outer sleeve; 21. Lower connection plate; 22. Fixing plate; 23. Support plate; 24. Rib plate; 25. High-strength bolt. Detailed Implementation

[0026] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figures 1-5 As shown, this utility model provides a technical solution:

[0028] A prefabricated bridge widening connection structure is installed between a new bridge and an old bridge, with the bridge decks of the new and old bridges on the same horizontal plane. The connection structure includes a T-shaped cross-section beam 3, which is installed between the old bridge flange 1 of the old bridge and the new bridge flange 2 of the new bridge. A gap is left between the old bridge flange 1 and the new bridge flange 2 to accommodate the T-shaped cross-section beam 3. A connection layer is provided at the connection between the T-shaped cross-section beam 3 and the old bridge flange 1 and the new bridge flange 2. The bottom of the T-shaped cross-section beam 3 passes through the gap between the old bridge flange 1 and the new bridge flange 2 and is connected to a damping component 5. The bottom of the damping component 5 is connected to the top of a triangular steel truss 6. The two ends of the bottom of the triangular steel truss 6 are connected to beam supports 7, which are installed on the side of the beam box of the old bridge and the new bridge that are close to each other.

[0029] In an optional embodiment, the T-shaped cross-section beam 3 includes a flange plate 14 and a wet joint plate 15. The wet joint plate 15 is disposed in the middle of the bottom side of the flange plate 14. The flange plate 14 and the wet joint plate 15 are arranged in a T-shape. The bottom of the flange plate 14 is used to connect with the connecting layer, and the two sides of the wet joint plate 15 are used to connect the sides of the old bridge flange 1 and the new bridge flange 2.

[0030] In an optional embodiment, the connecting layer is made of resin elastic concrete 4, with a thickness sufficient to ensure that the upper surface of the flange plate 14 is on the same plane as the upper surfaces of the old bridge flange 1 and the new bridge flange 2. A portion of concrete is removed from the upper part of the side of the old bridge flange 1 and the new bridge flange 2 that are close to each other to form a groove, and the groove is symmetrical about the gap between the old bridge flange 1 and the new bridge flange 2. A layer of resin elastic concrete 4 with a thickness of 2 to 3 cm is laid in the groove to generate a certain degree of elastic deformation when bearing load, so as to avoid rigid fracture at the connection between the old bridge flange 1 and the new bridge flange 2 and improve stability.

[0031] In an optional embodiment, the wet joint slab 15 is made of reinforced concrete, and the T-section beam 3 is a precast beam. The precast beam is made by binding and welding longitudinal steel bars, then installing a formwork and pouring concrete.

[0032] In an optional embodiment, the shock-absorbing assembly 5 includes a damping spring 18, a telescopic inner sleeve 19, and a telescopic outer sleeve 20. The telescopic inner sleeve 19 and the telescopic outer sleeve 20 are slidably connected to each other, and the gap on the side where the telescopic inner sleeve 19 and the telescopic outer sleeve 20 are slidably connected is small, so as to achieve the effect of airflow combined with the damping effect of the damping spring 18. The damping spring 18 is coaxially arranged inside the telescopic inner sleeve 19, and the two ends of the damping spring 18 are respectively connected to the telescopic inner sleeve 19 and the telescopic outer sleeve 20 to reset the relative position of the telescopic inner sleeve 19 and the telescopic outer sleeve 20.

[0033] In an optional embodiment, the top of the telescopic inner sleeve 19 is provided with an upper connecting plate 17 for connecting the wet joint plate 15, and the bottom of the telescopic outer sleeve 20 is provided with a lower connecting plate 21 for connecting the triangular steel truss 6. Bolt holes 16 are provided on both the upper connecting plate 17 and the lower connecting plate 21 for setting connecting bolts to achieve assembly connection.

[0034] In an optional embodiment, the triangular steel truss 6 includes an I-beam 13 and a node plate 8. The I-beam 13 forms an isosceles triangle, and the ends of adjacent I-beams 13 are connected by the node plate 8. The node plate 8 has several through holes corresponding to the positions of the I-beams 13 for connecting bolts. Preferably, an I-beam 13 with its length direction perpendicular to the base is provided in the middle of the isosceles triangular steel truss 6, and it is connected to the I-beams 13 on the three sides of the isosceles triangle by the node plate 8, which further improves the stability of the triangular steel truss 6 support.

[0035] In an optional embodiment, a truss connecting plate 10 is provided on the node plate 8 at the top of the triangular steel truss 6. A circular hole 9 is provided on the truss connecting plate 10 corresponding to the bolt hole 16 on the lower connecting plate 21 for connecting the shock absorption component 5 through connecting bolts. Angle connecting plates 11 are provided on the node plates 8 at both ends of the bottom of the triangular steel truss 6. A connecting hole 12 is provided on the angle connecting plate 11 for connecting the beam support 7. The truss connecting plate 10 and the angle connecting plate 11 are both made of L-shaped steel plates for easy and quick connection. Preferably, the gap between the I-beam 13 and the node plate 8, and between the node plate 8 and the truss connecting plate 10 and the angle connecting plate 11 are welded.

[0036] In an optional embodiment, the beam support 7 includes a fixed plate 22, a support plate 23, and a rib plate 24. The fixed plate 22 and the support plate 23 are connected in an L-shape. The rib plate 24 is disposed between the fixed plate 22 and the support plate 23, and the plate surface of the rib plate 24 is perpendicular to the plate surfaces of both the fixed plate 22 and the support plate 23. Several high-strength bolts 25 are provided on both the fixed plate 22 and the support plate 23. The high-strength bolts 25 on the fixed plate 22 are used to connect the side of the box girder of the old bridge or the new bridge. When drilling holes in the box girder, care should be taken to avoid the reinforcing bars to avoid damaging the load-bearing structure of the box girder. The high-strength bolts 25 on the support plate 23 are used to connect the corner connecting plate 11. The gap between the corner connecting plate 11 and the support plate 23 can also be welded to further improve the stability of the connection.

[0037] In an optional embodiment, multiple triangular steel trusses 6 are evenly arranged along the length of the bridge. Preferably, a set of damping components 5 and triangular steel trusses 6 are arranged every 4 meters.

[0038] Working principle: First, grooves for placing T-section beams 3 are chiseled above the new bridge flange 2 and the old bridge flange 1, which are close to each other. The grooves are located on the same horizontal plane and have the same width. Then, resin elastic concrete 4 is laid in the grooves, and T-section beams 3 are set on the resin elastic concrete 4. The upper surface of the flange plate 14 of the T-section beam 3 is on the same plane as the bridge deck of the new and old bridges. A wet joint plate 15 passes through the gap between the new bridge flange 2 and the old bridge flange 1. The two sides of the wet joint plate 15 can also be connected to the new bridge flange 2 and the old bridge flange 1 through the resin elastic concrete 4 to improve the overall stability. At the bottom of the wet joint plate 15, damping components 5 are evenly set along the length of the bridge. The bottom of each damping component 5 is connected to a triangular steel truss 6. Several triangular steel trusses 6 are evenly set along the length of the bridge, and the number is the same as the number of damping components 5. The bottom ends of the triangular steel trusses 6 are respectively set on the box girder of the new bridge and the old bridge through beam supports 7.

[0039] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more unless otherwise explicitly specified.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can 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.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A prefabricated bridge-to-bridge widening and connection structure, installed between a new bridge and an old bridge, characterized in that, The structure includes a T-shaped cross-section beam (3), which is set between the old bridge flange (1) of the old bridge and the new bridge flange (2) of the new bridge. A gap is left between the old bridge flange (1) and the new bridge flange (2) to accommodate the T-shaped cross-section beam (3). A connecting layer is set at the connection between the T-shaped cross-section beam (3) and the old bridge flange (1) and the new bridge flange (2). After the bottom of the T-shaped cross-section beam (3) passes through the gap between the old bridge flange (1) and the new bridge flange (2), a shock-absorbing component (5) is set. A triangular steel truss (6) is set at the bottom of the shock-absorbing component (5). The two ends of the bottom of the triangular steel truss (6) are connected to beam supports (7). The beam supports (7) are set on the side of the old bridge and the new bridge that are close to each other.

2. The prefabricated new and old bridge widening connection structure according to claim 1, characterized in that: The T-section beam (3) includes a flange plate (14) and a wet joint plate (15). The wet joint plate (15) is located in the middle of the bottom side of the flange plate (14). The bottom of the flange plate (14) is used to connect with the connecting layer. The two sides of the wet joint plate (15) are used to connect the sides of the old bridge flange (1) and the new bridge flange (2).

3. The prefabricated bridge widening and connection structure according to claim 2, characterized in that: The connecting layer is made of resin elastic concrete (4), and the thickness is sufficient to make the upper surface of the flange plate (14) and the upper surface of the old bridge flange (1) and the new bridge flange (2) on the same plane.

4. The prefabricated new and old bridge widening connection structure according to claim 3, characterized in that: The wet joint board (15) is made of reinforced concrete.

5. The prefabricated new and old bridge widening connection structure according to claim 4, characterized in that: The shock absorption assembly (5) includes a damping spring (18), a telescopic inner sleeve (19) and a telescopic outer sleeve (20). The telescopic inner sleeve (19) and the telescopic outer sleeve (20) are slidably connected to each other. The damping spring (18) is coaxially arranged inside the telescopic inner sleeve (19), and the two ends of the damping spring (18) are respectively connected to the telescopic inner sleeve (19) and the telescopic outer sleeve (20).

6. The prefabricated new and old bridge widening connection structure according to claim 5, characterized in that: The top of the telescopic inner sleeve (19) is provided with an upper connecting plate (17) for connecting the wet joint plate (15), and the bottom of the telescopic outer sleeve (20) is provided with a lower connecting plate (21) for connecting the triangular steel truss (6). Bolt holes (16) are provided on both the upper connecting plate (17) and the lower connecting plate (21) for setting connecting bolts.

7. The prefabricated new and old bridge widening connection structure according to claim 6, characterized in that: The triangular steel truss (6) includes an I-beam (13) and a node plate (8). The I-beam (13) is enclosed in an isosceles triangle. The ends of adjacent I-beams (13) are connected by the node plate (8). Several through holes are provided on the node plate (8) corresponding to the positions of the I-beams (13) for connecting bolts.

8. The prefabricated new and old bridge widening connection structure according to claim 7, characterized in that: A truss connecting plate (10) is provided on the node plate (8) at the top of the triangular steel truss (6). A round hole (9) is provided on the truss connecting plate (10) corresponding to the bolt hole (16) on the lower connecting plate (21) for connecting the shock absorption component (5) through connecting bolts. Angle connecting plates (11) are provided on the node plates (8) at both ends of the bottom of the triangular steel truss (6). A connecting hole (12) is opened on the angle connecting plate (11) for connecting the beam support (7).

9. A prefabricated bridge widening and connection structure according to claim 8, characterized in that: The beam support (7) includes a fixed plate (22), a support plate (23) and a rib plate (24). The fixed plate (22) and the support plate (23) are connected in an L-shape. The rib plate (24) is located between the fixed plate (22) and the support plate (23), and the plate surface of the rib plate (24) is perpendicular to the plate surfaces of both the fixed plate (22) and the support plate (23). Several high-strength bolts (25) are provided on both the fixed plate (22) and the support plate (23). The high-strength bolts (25) on the fixed plate (22) are used to connect the sides of the old bridge or the new bridge, and the high-strength bolts (25) on the support plate (23) are used to connect the corner connecting plate (11).

10. A prefabricated bridge widening and connection structure according to claim 9, characterized in that: Multiple triangular steel trusses (6) are evenly arranged along the length of the bridge.

Images