Bridge expansion device

Abstract

A bridge expansion device is characterized in that a joint crossing plate is mounted in a first mounting notch of a first beam body, a fixing plate is mounted in a second mounting notch of a second beam body, the joint crossing plate extends into the second mounting notch and is in comb tooth fit with the fixing plate, and a mounting hole is formed in a sliding plate assembly below the fixing plate; the fastening screws penetrate through the mounting holes from bottom to top and connect and fix the sliding plate assembly to the fixing plate. According to the bridge expansion device, the fastening screws penetrate through the mounting holes from bottom to top, the sliding plate assembly is fixedly connected to the fixing plate, the sliding plate assembly and the bottom face of the fixing plate are compact, the sliding plate assembly is further provided with the screw holes and the lifting nuts, the screw holes are formed between the comb tooth parts of the joint crossing plate, and the suspended section of the sliding plate assembly can be lifted through an external tool; the influence of gravity of the suspended section is overcome, it is ensured that the sliding plate assembly can be tightly attached to the bottom face of a joint crossing plate and the bottom face of a fixing plate, the concrete compactness condition below the sliding plate assembly can be observed through the screw holes, the concrete cavity phenomenon is prevented, and then the installation quality of the telescopic device is improved.

Description

Technical Field

[0001] The utility model relates to a bridge expansion device. Background Art

[0002] During the operation of bridge engineering, creep caused by vehicle loads, bridge's own materials and temperature, wind action, etc., leads to deformations such as bridge shrinkage and elongation. The expansion device is one of the important functional components of bridge engineering to meet the requirements of bridge deformation. Usually, the expansion device is installed between bridges and between bridges and abutments. To ensure the safe and stable driving of vehicles, the expansion device installed on the bridge should meet the various change requirements of the beam body. Although the conventional comb-tooth plate expansion joint device can meet the basic requirements of the beam body's expansion and displacement, without bolts, the installation of the stainless steel slide plate is relatively complex and difficult. In addition, after the stainless steel plate is welded to the fixing plate, since the welding position is at one end of the fixing plate, the other end is prone to sag due to its own weight during installation, that is, the stainless steel slide plate has a suspended section, and it is not easy to closely adhere the suspended section to the bottom surface of the joint plate and the fixing plate, thus affecting the installation quality of the expansion joint device. In addition, bolt holes are provided on the plate surface of the existing expansion joint device, and the joint plate and the fixing plate are fixed to the support member by bolts and nuts. For example, in the "Bridge Expansion Joint Structure" disclosed in the Chinese utility model patent with the patent number 201821897603.6 (authorized publication number CN 209353219 U), the joint plate of this expansion joint structure is welded to the rotating shaft as a whole and then installed on the bracket, and the pressure seat is pressed on the rotating shaft and fastened with bolts and nuts. The disadvantage of this structure is that the pressure seat and the bracket adopt a split structure and are connected and fixed with bolts, which will cause the phenomenon of bolt and nut loosening, resulting in easy generation of noise when vehicles pass through, reducing the riding comfort, and there are bolt holes on the plate surface, increasing the vehicle passing noise. To sum up, it is necessary to further improve the existing bridge expansion device. Summary of the Utility Model

[0003] The first technical problem to be solved by the utility model is to provide a bridge expansion device that can closely adhere the slide plate assembly to the bottom surface of the fixing plate in view of the above-mentioned prior art status.

[0004] The second technical problem to be solved by the utility model is to provide a bridge expansion device that can closely adhere the slide plate assembly to the bottom surfaces of the fixing plate and the joint plate in view of the above-mentioned prior art status.

[0005] The technical solution adopted by the present utility model to solve the above first technical problem is as follows: A bridge expansion device includes a gap-crossing plate and a fixed plate. The gap-crossing plate is installed in the first installation notch of the first beam body, and the fixed plate is installed in the second installation notch of the second beam body. The gap-crossing plate extends into the second installation notch and forms a comb-like fit with the fixed plate. A sliding plate assembly is provided below the fixed plate, and it is characterized in that: mounting holes are formed in the sliding plate assembly, and fastening screws pass through the mounting holes from bottom to top and connect and fix the sliding plate assembly to the fixed plate.

[0006] Preferably, the fastening screws are fixed on the comb teeth part of the fixed plate.

[0007] Further preferably, the fastening screws are fixed on the tips of the comb teeth of the comb teeth part of the fixed plate.

[0008] The technical solution adopted by the present utility model to solve the above second technical problem is as follows: Threaded holes are formed in the sliding plate assembly, and nuts corresponding to the threaded holes are fixed at the bottom of the sliding plate assembly. The threaded holes are arranged between the comb teeth parts of the gap-crossing plate. With such a setting, an external tooling can be used to lift the suspended section of the sliding plate assembly, overcoming the influence of the gravity of the suspended section to ensure close contact with the bottom surfaces of the gap-crossing plate and the fixed plate.

[0009] In order to fix the nuts at the bottom of the sliding plate assembly, the nuts are welded and fixed at the bottom of the sliding plate assembly.

[0010] In order to make the sliding plate assembly fit more closely to the bottom surfaces of the gap-crossing plate and the fixed plate, the mounting holes and the threaded holes correspond to each other and are both spaced along the transverse direction of the bridge.

[0011] The sliding plate assembly can have various structures. Preferably, the sliding plate assembly includes a stainless steel sliding plate and a rubber cushion plate adhesively fixed to the bottom surface of the stainless steel sliding plate.

[0012] Further preferably, anti-slip grooves are engraved on the surfaces of the gap-crossing plate and the fixed plate. With such a setting, when a vehicle passes through the anti-slip grooves, the friction force can be increased, thereby achieving an anti-slip effect.

[0013] In order to adjust the installation height of the expansion device, height-adjusting components for adjusting the installation height of the gap-crossing plate are installed in the first installation notch, and height-adjusting components for adjusting the installation height of the fixed plate are installed in the second installation notch.

[0014] The height-adjusting component can have various structures. Preferably, the height-adjusting component is an anchoring component. Embedded steel bars are installed in the first installation notch and the second installation notch. The anchoring component is welded and fixed to the corresponding embedded steel bar, and the crack-crossing plate and the fixing plate are welded and fixed to the corresponding anchoring component. With such a setting, the installation of the crack-crossing plate and the fixing plate does not require bolt connection and fixation. There are no bolt holes on the plate surface, reducing the noise generated by vehicle passage, improving comfort, and eliminating the problem of bolt and nut loosening, playing an anti-detachment function and improving the reliability of the expansion device.

[0015] Compared with the prior art, the advantages of the present utility model are as follows: A sliding plate component is provided below the fixing plate of the bridge expansion device. The fastening screw passes through the installation hole on the sliding plate component from bottom to top and connects and fixes the sliding plate component to the fixing plate, enabling the sliding plate component to be dense with the bottom surface of the fixing plate. In addition, screw holes and lifting nuts are also provided on the sliding plate component, and the screw holes are arranged between the comb teeth of the crack-crossing plate. Thus, the suspended section of the sliding plate component can be lifted by using external tools to overcome the influence of the gravity of the suspended section to ensure close contact with the bottom surfaces of the crack-crossing plate and the fixing plate. During concrete pouring, the compactness of the concrete below the sliding plate component can be observed through these rows of screw holes, thereby preventing the occurrence of concrete cavities and improving the installation quality of the expansion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the installation structure of the bridge expansion device according to an embodiment of the present utility model;

[0017] Figure 2 It is an assembly drawing of the bridge expansion device according to an embodiment of the present utility model;

[0018] Figure 3 It is a schematic diagram of the installation structure of the fixing plate and the sliding plate component according to an embodiment of the present utility model;

[0019] Figure 4 is Figure 3 A schematic diagram of the structure from another angle of the shown installation structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the present utility model in detail with reference to the embodiments of the drawings.

[0021] As Figures 1 to 4As shown in the figure, the bridge expansion device of this embodiment includes a joint-span plate 1 and a fixed plate 2. The joint-span plate 1 is installed in the first installation notch 103 of the first beam body 101, and the fixed plate 2 is installed in the second installation notch 104 of the second beam body 102. After crossing the structural joint 9, the joint-span plate 1 extends into the second installation notch 104 and forms a comb-like fit with the fixed plate 2, enabling the expansion device to have a longitudinal displacement function due to the movement of the bridge. A height-adjusting component for adjusting the installation height of the joint-span plate 1 is installed in the first installation notch 103, and a height-adjusting component for adjusting the installation height of the fixed plate 2 is installed in the second installation notch 104. Embedded steel bars 8 are installed in the first installation notch 103 and the second installation notch 104. The height-adjusting component of this embodiment is an anchoring component 7, and the anchoring component 7 is welded and fixed to the corresponding embedded steel bar 8. The joint-span plate 1 and the fixed plate 2 are welded and fixed to the corresponding anchoring component 7. During installation, according to the height of the notch and the height of the road surface, by moving the anchoring component 7 up and down with respect to the embedded steel bar 8 in the notch, the flatness and installation height of the expansion device and the bridge road surface are adjusted, thus realizing the function of adjustable height.

[0022] A sliding plate assembly 3 is provided below the fixed plate 2. The sliding plate assembly 3 includes a stainless-steel sliding plate 31 and a rubber cushion plate 32 adhesively fixed to the bottom surface of the stainless-steel sliding plate. The rubber cushion plate 32 is usually a canvas rubber cushion plate and is connected to the stainless-steel sliding plate 31 by glue. The combination of the stainless-steel sliding plate 31 and the canvas rubber cushion plate reduces the noise when the vehicle passes and buffers the impact force when the vehicle passes. The stainless-steel sliding plate 31 is placed between the joint-span plate 1 and the fixed-end concrete, reducing the friction between the joint-span plate 1 and the concrete, reducing the accumulation of bridge deck debris in the comb teeth groove, and protecting the concrete at the lower part of the fixed end.

[0023] Installation holes (not shown in the figure) are provided on the sliding plate assembly 3, and the installation holes are spaced along the transverse direction of the bridge, that is, there is a row of installation holes. The fastening screws 4 pass through the installation holes from bottom to top and connect and fix the sliding plate assembly 3 to the fixed plate 2, specifically fixed on the tips of the teeth of the comb-like part of the fixed plate 2. The sliding plate assembly 3 adopts a reverse fastening method, which is more convenient for installation. After being fastened in reverse by the fastening screws 4, the sliding plate assembly 3 and the fixed plate 2 can be further flattened.

[0024] The skateboard assembly 3 is also provided with screw holes 33, which correspond to the mounting holes one by one. The screw holes 33 are arranged between the comb teeth of the gap-crossing plate 1, that is, relative to the mounting holes, the screw holes 33 are closer to the structural joint 9. A nut 5 corresponding to the screw hole 33 is provided at the bottom of the skateboard assembly 3, and the nut 5 is welded and fixed directly below the corresponding screw hole 23. During installation, the skateboard assembly 3 is lifted by a bolt through a tooling 10, so that the stainless steel skateboard 31 can be closely attached to the bottom surfaces of the gap-crossing plate 1 and the fixed plate 2, ensuring that the stainless steel skateboard 31 can be installed conveniently and quickly. At the same time, during the pouring of concrete, the compactness of the concrete under the stainless steel skateboard 31 can be observed through this row of screw holes 33, thereby preventing the occurrence of voids in the concrete and improving the installation quality of the expansion device.

[0025] In addition, in order to increase the friction force when the vehicle passes through the expansion device, anti-slip grooves 8 are engraved on the upper surfaces of the gap-crossing plate 1 and the fixed plate 2.

Claims

1. A bridge expansion device, comprising a cross-gap plate (1) and a fixed plate (2), the cross-gap plate (1) is installed in a first installation notch (103) of a first beam body (101), the fixed plate (2) is installed in a second installation notch (104) of a second beam body (102), the cross-gap plate (1) extends into the second installation notch (104) and forms a comb-like fit with the fixed plate (2), and a sliding plate assembly (3) is arranged below the fixed plate (2), characterized in that: The skateboard assembly (3) is provided with mounting holes, and fastening screws (4) pass through the mounting holes from bottom to top and connect and fix the skateboard assembly (3) to the fixing plate (2).

2. The bridge expansion device according to claim 1, characterized in that: The fastening screws (4) are fixed on the comb teeth portion of the fixing plate (2).

3. The bridge expansion device according to claim 2, wherein: The fastening screws (4) are fixed on the tips of the teeth of the comb teeth portion of the fixing plate (2).

4. The bridge expansion device according to claim 2, characterized in that: The skateboard assembly (3) is provided with threaded holes (33), and a nut (5) corresponding to the threaded holes (33) is fixed at the bottom of the skateboard assembly (3). The threaded holes (33) are arranged between the comb teeth portions of the cross-seam plate (1).

5. The bridge expansion device according to claim 4, characterized in that: The nut (5) is welded and fixed at the bottom of the skateboard assembly (3).

6. The bridge expansion device according to claim 4, characterized in that: The mounting holes and the threaded holes (33) are in one-to-one correspondence and are all spaced along the transverse bridge direction.

7. The bridge expansion device according to claim 1, characterized in that: The skateboard assembly (3) includes a stainless steel skateboard (31) and a rubber cushion plate (32) adhesively fixed to the bottom surface of the stainless steel skateboard.

8. The bridge expansion device according to claim 1, characterized in that: Anti-slip grooves (6) are engraved on the surfaces of the cross-seam plate (1) and the fixing plate (2).

9. The bridge expansion device according to any one of claims 1 to 8, characterized in that: A height-adjusting assembly for adjusting the installation height of the cross-seam plate (1) is installed in the first installation notch (103), and a height-adjusting assembly for adjusting the installation height of the fixing plate (2) is installed in the second installation notch (104).

10. The bridge expansion device according to claim 9, wherein: The height-adjusting assembly is an anchoring assembly (7). Embedded steel bars (8) are installed in the first installation notch (103) and the second installation notch (104). The anchoring assembly (7) is welded and fixed to the corresponding embedded steel bars (8), and the cross-seam plate (1) and the fixing plate (2) are welded and fixed to the corresponding anchoring assemblies (7).

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