A telescopic device for highway bridges

Abstract

The utility model relates to a telescopic device for highway bridge, including cross joint comb tooth board, set up in the bridge main body of opening expansion joint, fixed comb tooth board, and cross joint comb tooth board opposite setting in the opposite side of expansion joint, the tooth part staggered alignment between cross joint comb tooth board and fixed comb tooth board, multidirectional displacement subassembly, including two ends simultaneously connect bridge main body's first stop lever and two ends simultaneously connect cross joint comb tooth board's second stop lever, wherein, first stop lever sets at least two, and first stop lever and second stop lever staggered arrangement and perpendicular to expansion joint, multidirectional displacement subassembly still include first limit rod, first limit rod passes through the gap between first stop lever and bridge main body simultaneously, and the gap between second stop lever and cross joint comb tooth board, the utility model discloses through multidirectional displacement subassembly connection cross joint comb tooth board and bridge main body, make cross joint comb tooth board can move in multiple directions horizontally, adapt the expansion and rotation deformation of bridge.

Description

Technical Field

[0001] This utility model relates to the field of bridge expansion joint technology, and in particular to expansion joints for highway bridges. Background Technology

[0002] To accommodate the deformation of bridge beams, expansion joints are typically installed between the ends of the two beams, between the beam ends and the abutments, or at the hinged joints of the bridge. These expansion joints can accommodate deformations caused by temperature expansion and contraction, concrete creep, and live loads.

[0003] While existing comb-plate expansion joint devices can meet the basic requirements for beam expansion and contraction, they are fixed to the bridge structure with bolts and can only withstand deformation in the direction of expansion and contraction along the length of the teeth. However, beam end rotation is inevitable during bridge use, in addition to expansion and contraction. Conventional comb-plate expansion joint devices, with their staggered teeth mutually restricting radial movement along the bridge, cannot generate corresponding lateral movement in response to beam end rotation.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an expansion joint for highway bridges to accommodate the expansion, contraction and rotation deformation of the bridge.

[0006] The technical solution of this utility model is as follows:

[0007] The expansion joint for highway bridges includes:

[0008] Expansion joint comb plates are installed on the main body of bridges where expansion joints are located;

[0009] A fixed comb plate is disposed opposite to the expansion joint, and the cross-joint comb plate is disposed facing each other; the teeth of the cross-joint comb plate and the fixed comb plate are staggered and aligned.

[0010] A multi-directional displacement assembly includes a first stop bar that is simultaneously connected to the main body of the bridge at both ends and a second stop bar that is simultaneously connected to the cross-joint comb plate at both ends;

[0011] The first stop bar is provided in at least two parts, and the first stop bar and the second stop bar are staggered and perpendicular to the expansion joint; the multi-directional displacement component also includes a first limiting bar; the first limiting bar passes through the gap between the first stop bar and the bridge body, and the gap between the second stop bar and the cross-joint comb plate.

[0012] A further technical solution is that the multi-directional displacement component also includes a second limiting rod; the second limiting rod is disposed on the side of the first stop rod near the cross-slot comb plate; the cross-slot comb plate passes through the gap between the second stop rod and the cross-slot comb plate.

[0013] A further technical solution is that at least two first limiting rods are provided.

[0014] A further technical solution is that, along the length direction of the expansion joint, at least two cross-joint comb plates and at least two fixed comb plates are respectively provided.

[0015] A further technical solution is that the cross-slot comb plate has an extension on the surface near the main body of the bridge; the fixed comb plate has a guide sleeve on the extension on the surface near the main body of the bridge.

[0016] A further technical solution is that embedded parts are provided on the main body of the bridge; the cross-joint comb plate and the fixed comb plate are connected to the main body of the bridge through the embedded parts.

[0017] A further technical solution is that anchor bolts are provided on the fixed comb plate; the anchor bolts are welded to the embedded parts.

[0018] A further technical solution is that rubber is filled between the cross-joint comb plate and the bridge body; concrete is filled between the fixed comb plate and the bridge body.

[0019] A further technical solution is that stainless steel sliding plates are respectively provided on the surface of the rubber near the cross-slot comb plate and on the surface of the concrete near the fixed comb plate.

[0020] A further technical solution is that a shock-absorbing rubber plate is also provided between the fixed comb plate and the bridge body; the shock-absorbing rubber plate is located on the side of the fixed comb plate away from the cross-joint comb plate.

[0021] The beneficial technical effects of this utility model are as follows:

[0022] (1) The expansion joint device for highway bridges in this utility model is provided with a cross-joint comb plate and a fixed comb plate. When the bridge expands and deforms, the cross-joint comb plate and the fixed comb plate slide relative to each other along the length of the teeth to accommodate the movement of the bridge body on the opposite side of the expansion joint away from or towards the bridge body during the expansion and deformation. In addition, along the width direction of the expansion joint, the first limiting rod can slide between the first stop and the main body of the strong beam, and between the second stop and the cross-joint comb plate, so that the cross-joint comb plate can move along the width direction of the expansion joint to accommodate the expansion and deformation of the bridge. Along the length direction of the expansion joint, there are gaps between adjacent first stops and adjacent second stops that allow for displacement, so that the cross-joint comb plate can move along the length direction of the expansion joint to accommodate the rotational deformation of the strong beam.

[0023] (2) Furthermore, a second limiting rod is also provided. The second limiting rod and the first limiting rod work together to further limit the relative displacement between the cross-joint comb plate and the main body of the bridge. At the same time, the second limiting rod works with the first limiting rod to enhance the connection strength between the cross-joint comb plate and the main body of the bridge.

[0024] (3) Furthermore, multiple cross-slot comb plates and fixed comb plates are set in a modular manner to facilitate later maintenance. At the same time, the modular setting also facilitates the lateral movement of some parts of the structure. Attached Figure Description

[0025] Figure 1 A front view structural schematic diagram of a telescopic device for highway bridges according to an embodiment of the present disclosure is shown.

[0026] Figure 2 A cross-sectional view of a highway bridge expansion joint according to an embodiment of the present disclosure is shown at point AA.

[0027] Marked in the attached diagram:

[0028] 1. Multi-directional displacement assembly; 11. First stop bar; 12. Second stop bar; 13. First limiting bar; 14. Second limiting bar; 2. Cross-joint comb plate; 21. First tooth; 22. Extension; 3. Fixed comb plate; 31. Shock-absorbing rubber plate; 32. Main body; 33. Second tooth; 34. Guide sleeve; 4. Water-stop tape; 41. Centralized drainage outlet; 5. Bridge main body; 51. Stainless steel sliding plate; 52. Embedded part; 53. Concrete; 54. Rubber; 55. Expansion joint; 6. Anchor bolt. Detailed Implementation

[0029] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0030] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0031] Figure 1 A front view structural schematic diagram of a telescopic device for highway bridges according to an embodiment of the present disclosure is shown. Figure 2 A cross-sectional view at point A is shown of a highway bridge expansion joint according to an embodiment of this disclosure. Please refer to... Figure 1 and Figure 2The expansion joint device for highway bridges includes a cross-joint comb plate 2, installed on the bridge body 5 where the expansion joint 55 is located. A fixed comb plate 3 is installed opposite the cross-joint comb plate 2 on the opposite side of the expansion joint 55. The teeth of the cross-joint comb plate 2 and the fixed comb plate 3 are staggered and aligned. When the bridge expands and deforms, the cross-joint comb plate 2 and the fixed comb plate 3 slide relative to each other along the length of the teeth to accommodate the movement of the bridge body 5 on the opposite side of the expansion joint 55. A multi-directional displacement assembly 1 includes a first stop bar 11 connected to both ends of the bridge body 5 and a second stop bar 12 connected to both ends of the cross-joint comb plate 2; the first stop bar 11 and the second stop bar 12 can be U-bolts, threadedly connected to the cross-joint comb plate 2 and the bridge body 5, respectively. At least two first stop bars 11 are provided, and the first stop bars 11 and the second stop bars 12 are staggered and perpendicular to the expansion joint 55. The multi-directional displacement assembly 1 also includes a first limiting rod 13. The first limiting rod 13 passes through the gap between the first stop 11 and the bridge main body 5, and the gap between the second stop 12 and the cross-joint comb plate 2. Along the width direction of the expansion joint 55, the first limiting rod 13 can slide between the first stop 11 and the main beam 32, and between the second stop 12 and the cross-joint comb plate 2, allowing the cross-joint comb plate 2 to move along the width direction of the expansion joint 55 to accommodate the bridge's expansion and contraction deformation. Along the length direction of the expansion joint 55, there are gaps between adjacent first stop 11s and adjacent second stop 12s, allowing the cross-joint comb plate 2 to move along the length direction of the expansion joint 55 to accommodate the rotational deformation of the main beam.

[0032] Preferably, a water-stop tape 4 is installed between the expansion joints 55, with the long side of the water-stop tape 4 connecting to the opposite side of the expansion joint 55. A centralized drainage outlet 41 is installed on the water-stop tape 4 to collect rainwater and discharge it centrally, reducing the impact of rainwater on the main beam 32.

[0033] Please refer to Figure 2 The multi-directional displacement assembly 1 also includes a second limiting rod 14. The second limiting rod 14 is disposed on the side of the first stop 11 near the cross-joint comb plate 2. The cross-joint comb plate 2 passes through the gap between the second stop 12 and the cross-joint comb plate 2. The second limiting rod 14 and the first limiting rod 13 cooperate to further limit the relative displacement between the cross-joint comb plate 2 and the bridge body 5. At the same time, the second limiting rod 14 cooperates with the first limiting rod 13 to enhance the connection strength between the cross-joint comb plate 2 and the bridge body 5.

[0034] Preferably, at least two first limiting rods 13 are provided. This further enhances the connection strength between the cross-joint comb plate 2 and the bridge body 5.

[0035] Please refer to Figure 1 and Figure 2Along the length of the expansion joint 55, at least two cross-joint comb plates 2 and two fixed comb plates 3 are respectively provided to realize the modular setting of cross-joint comb plates 2 and fixed comb plates 3, which facilitates later maintenance. At the same time, the modular setting also facilitates the lateral movement of some parts of the structure.

[0036] Preferably, the cross-joint comb plate 2 has an extension 22 on its surface near the bridge body 5. The fixed comb plate 3 has a guide sleeve 34 on its surface near the bridge body 5, which is fitted onto the extension 22. The extension 22 and the guide sleeve 34 cooperate to limit the relative position of the fixed comb plate 3 and the cross-joint comb plate 2, preventing misalignment.

[0037] More preferably, a damping rubber plate 31 is also provided between the fixed comb plate 3 and the bridge body 5. The damping rubber plate 31 is located on the side of the fixed comb plate 3 away from the cross-joint comb plate 2, in order to reduce the transmission of vibration generated when the cross-joint comb plate 2 and the fixed comb plate 3 are connected to the bridge body 5.

[0038] Please refer to Figure 1 and Figure 2 An embedded part 52 is installed on the main body of the bridge 5. The cross-joint comb plate 2 and the fixed comb plate 3 are connected to the main body of the bridge 5 through the embedded part 52. The embedded part 52 can be a welded connection embedded steel plate (not shown in the figure) and a shear stud (not shown in the figure), which is fixed on the main body of the bridge 5 and facilitates welding connection to other structures.

[0039] Preferably, anchor bolts 6 are provided on the fixed comb plate 3. The anchor bolts 6 and guide sleeves 34 are staggered to avoid interference. The anchor bolts 6 are welded to the embedded parts 52 to connect the fixed comb plate 3 and the bridge body 5. The teeth on the cross-joint comb plate 2 are the first teeth 21, and the teeth on the fixed comb plate 3 are the second teeth 33. The first teeth 21 and the second teeth 33 interlock to adapt to the increase and decrease of the width of the expansion joint 55.

[0040] In some embodiments, the anchor bolt 6 is a U-bolt. The fixed comb plate 3 includes a main body 32 and a second tooth 33. One end of the anchor bolt 6 is connected to the main body 32, and the other end is connected to the second tooth 33. Multiple anchor bolts 6 are provided on a fixed comb plate 3 to enhance the connection strength between the fixed comb plate 3 and the bridge main body 5.

[0041] Please refer to Figure 1 and Figure 2 Rubber 54 is filled between the joint comb plate 2 and the bridge body 5. The rubber 54 supports the joint comb plate 2 and adapts to the lateral movement of the joint comb plate 2 by utilizing the elastic deformation of the rubber 54. Concrete 53 is filled between the fixed comb plate 3 and the bridge body 5 to support the fixed comb plate 3.

[0042] Preferably, stainless steel sliding plates 51 are respectively provided on the surface of the rubber 54 near the cross-slot comb plate 2 and on the surface of the concrete 53 near the fixed comb plate 3. The stainless steel sliding plates reduce the friction between the cross-slot comb plate 2 and the rubber 54, and also reduce the friction between the cross-slot comb plate 2 and the concrete 53, facilitating the lateral movement of the cross-slot comb plate 2.

[0043] The specific workflow of this utility model is as follows:

[0044] When the width of the expansion joint 55 decreases due to bridge expansion and contraction, the distance between the cross-joint comb plate 2 and the fixed comb plate 3 decreases, and the engagement depth of the first tooth 21 and the second tooth 33 increases. After the cross-joint comb plate 2 and the fixed comb plate 3 are fully engaged, if the width of the expansion joint 55 continues to decrease, the first stop 11 and the second stop 12 move relative to each other, causing the cross-joint comb plate 2 to move laterally to continue adapting to the width change of the expansion joint 55. When the width of the expansion joint 55 increases due to bridge expansion and contraction, the distance between the cross-joint comb plate 2 and the fixed comb plate 3 increases, and the engagement depth of the first tooth 21 and the second tooth 33 increases to adapt to the width change of the expansion joint 55. When the bridge rotates and deforms, the distance between the first limiting rod 13 and the second limiting rod 14, and the distance between adjacent first stops 11 and second stops 12 changes. At this time, the cross-joint comb plate 2 moves along the length of the expansion joint 55 to adapt to the rotational deformation under the bridge.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A telescopic device for highway bridges, characterized in that, The expansion joint for highway bridges includes: Expansion joint comb plates are installed on the main body of bridges where expansion joints are located; A fixed comb plate is disposed opposite to the expansion joint, and the cross-joint comb plate is disposed facing each other; the teeth of the cross-joint comb plate and the fixed comb plate are staggered and aligned. A multi-directional displacement assembly includes a first stop bar that is simultaneously connected to the main body of the bridge at both ends and a second stop bar that is simultaneously connected to the cross-joint comb plate at both ends; The first stop bar is provided in at least two parts, and the first stop bar and the second stop bar are staggered and perpendicular to the expansion joint; the multi-directional displacement component also includes a first limiting bar; the first limiting bar passes through the gap between the first stop bar and the bridge body, and the gap between the second stop bar and the cross-joint comb plate.

2. The expansion joint for highway bridges as described in claim 1, characterized in that: The multi-directional displacement assembly also includes a second limiting rod; the second limiting rod is disposed on the side of the first stop near the cross-slot comb plate; the cross-slot comb plate passes through the gap between the second stop and the cross-slot comb plate.

3. The expansion joint for highway bridges as described in claim 1, characterized in that: At least two first limiting rods are provided.

4. The expansion joint for highway bridges as described in claim 1, characterized in that: Along the length of the expansion joint, at least two cross-joint comb plates and at least two fixed comb plates are respectively provided.

5. The expansion joint for highway bridges as described in claim 1, characterized in that: The cross-joint comb plate has an extension on its surface near the main body of the bridge; the fixed comb plate has a guide sleeve fitted onto the extension on its surface near the main body of the bridge.

6. The expansion joint for highway bridges as described in claim 1, characterized in that: Embedded parts are installed on the main body of the bridge; the cross-joint comb plate and the fixed comb plate are connected to the main body of the bridge through the embedded parts.

7. The expansion joint for highway bridges as described in claim 6, characterized in that: Anchor bolts are provided on the fixed comb plate; the anchor bolts are welded to the embedded parts.

8. The expansion joint for highway bridges as described in claim 1, characterized in that: Rubber is filled between the cross-joint comb plate and the bridge body; concrete is filled between the fixed comb plate and the bridge body.

9. The expansion joint for highway bridges as described in claim 8, characterized in that: Stainless steel sliding plates are respectively installed on the surface of the rubber near the cross-slot comb plate and on the surface of the concrete near the fixed comb plate.

10. The expansion joint for highway bridges as described in claim 1, characterized in that: A shock-absorbing rubber plate is also provided between the fixed comb plate and the bridge body; the shock-absorbing rubber plate is located on the side of the fixed comb plate away from the cross-joint comb plate.

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