Transition-section-free concrete comb plate expansion device

Abstract

The utility model provides a transition section-free concrete comb plate expansion device, which comprises a first beam body, a second beam body, a plurality of anchor plates and a rubber pad, the opposite sides of the first beam body and the second beam body are respectively provided with a mounting groove, a movable comb plate and a fixed comb plate are respectively connected with the bottoms of the corresponding mounting grooves through connecting pieces, the number of the anchor plates is more than one, and the number of the rubber pad is more than one. The two anchor plates are symmetrically arranged at the bottom of the movable comb plate in pairs, a rotating shaft is movably arranged between the two anchor plates, the movable comb plate is hinged to the rotating shaft through a displacement base, and rubber pads are arranged at the bottom of the movable comb plate and the side wall, facing the first beam body, of the movable comb plate. And rubber pads are also arranged on the two side walls of the displacement base and the side wall, away from the displacement base, of the rotating shaft. The problem that in the prior art, cracking is easily caused due to the fact that the junction of transition section concrete and the telescopic device is irregular is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a concrete comb tooth plate expansion device without a transition section. Background Technique

[0002] The expansion device is one of the important functional components of bridge engineering, also known as the expansion joint or expansion joint. It is a key component set to solve the problems of bridge structure deformation caused by bridge temperature changes, load deformation, earthquakes, etc. This device is crucial for ensuring the structural integrity and service life of the bridge structure.

[0003] The current expansion device realizes vertical displacement through a rotating shaft and a displacement bottom plate. The rotating shaft is fixed under the movable end comb tooth plate, and the displacement bottom plate is anchored in the concrete. The rotating shaft is fixed to the displacement bottom plate through a steel cover plate. This anchoring structure causes irregularities at the junction of the transition section concrete and the expansion device, and the concrete at the steel cover plate is particularly prone to cracking and damage, thereby causing damage to the expansion device. Content of the Utility Model

[0004] Aiming at the deficiencies in the prior art, the utility model provides a concrete comb tooth plate expansion device without a transition section, which solves the problem of irregularities at the junction of the transition section concrete and the expansion device in the prior art, which are prone to cracking.

[0005] According to an embodiment of the utility model, a concrete comb tooth plate expansion device without a transition section includes a first beam body, a second beam body, an anchor plate and a rubber pad. Installation grooves are provided on the opposite sides of the first beam body and the second beam body. The movable comb tooth plate and the fixed comb tooth plate are both connected to the bottom of the corresponding installation groove through connecting pieces. There are several anchor plates, and two anchor plates are symmetrically arranged in groups of two at the bottom of the movable comb tooth plate. A rotating shaft is movably arranged between the two anchor plates. The movable comb tooth plate is hinged to the rotating shaft through a displacement base. Rubber pads are provided on the bottom of the movable comb tooth plate and on the side wall facing the first beam body. Rubber pads are also provided on the two side walls of the displacement base and on the side wall of the rotating shaft away from the displacement base.

[0006] Compared with the prior art, the utility model has the following beneficial effects: by arranging the rotating shaft under the movable comb tooth plate through the anchor plate, rubber pads are arranged at the bottom of the movable comb tooth plate and on the side facing the first beam body, and a rubber pad is also arranged around the rotating shaft. The elastic deformation of the rubber pad provides a rotating space for the multi-directional displacement of the movable comb tooth plate. Although the telescopic device also uses the rotating shaft to achieve the multi-directional displacement function, it is exactly opposite to the existing telescopic device anchoring structure. This telescopic device fixes the displacement base under the movable comb tooth plate, fixes the anchor plate of the rotating shaft at the anti-blocking plate at the movable end, and then fixes them together in the concrete, canceling the original steel cover plate. Thus, there is no need to apply transition section concrete at the junction of the movable comb tooth plate and the fixed comb tooth plate, effectively avoiding the situation where the overall damage of the telescopic device occurs after the transition section concrete cracks.

[0007] Further, the connecting member includes embedded bars and connecting bars. The embedded bars are embedded into the installation grooves. Installation holes are provided on both the movable comb tooth plate and the fixed comb tooth plate. One end of the connecting bar is connected to the installation hole through a nut, and the other end of the connecting bar is connected to the embedded bar.

[0008] Further, the embedded bar has a concave structure, and the connecting bar has an L-shaped structure.

[0009] Further, it further includes a baffle. The baffle is provided between the side wall of the movable comb tooth plate and the first beam body and between the fixed comb tooth plate and the second beam body. The baffle is fixedly connected to one side of the anchor plate.

[0010] Further, a sliding plate is provided at the bottom of the fixing plate.

[0011] Further, it further includes a sealing strip. The sealing strip is U-shaped, and the sealing strip is arranged below the movable comb tooth plate through concrete.

[0012] Further, it further includes angle steels. There are two angle steels. Both ends of the sealing strip are bent downward to form connecting grooves, and one end of each of the two angle steels is inserted into the two connecting grooves respectively.

[0013] Further, it further includes reinforcing ribs. There are several reinforcing ribs. The reinforcing ribs are U-shaped, and both ends of each reinforcing rib are fixedly connected to the side wall of the corresponding anchor plate. Description of the Drawings

[0014] Figure 1 It is the overall structure diagram of the embodiment of the utility model.

[0015] Figure 2 It is the cross-sectional structure diagram of the embodiment of the utility model.

[0016] Figure 3 It is the structural schematic diagram of the movable comb tooth plate direction of the embodiment of the utility model.

[0017] Figure 4 Schematic diagram of the structure for fixing the direction of the comb tooth plate according to an embodiment of the present invention.

[0018] In the above-mentioned drawings: 1. First beam body; 2. Second beam body; 3. Movable comb tooth plate; 4. Fixed comb tooth plate; 5. Anchor plate; 6. Rotating shaft; 7. Displacement base; 8. Rubber pad; 9. Embedded steel bar; 10. Connecting bar; 11. Baffle; 12. Slide plate; 13. Sealing strip; 14. Angle steel; 15. Reinforcing rib. Specific embodiments

[0019] The technical solutions in the present invention will be further described below with reference to the drawings and embodiments.

[0020] As Figure 1 —4 shows, an embodiment of the present invention provides a concrete comb tooth plate expansion device without a transition section, which includes a first beam body 1, a second beam body 2, an anchor plate 5 and a rubber pad 8. Installation grooves are provided on the opposite sides of the first beam body 1 and the second beam body 2. The movable comb tooth plate 3 and the fixed comb tooth plate 4 are both connected to the bottom of the corresponding installation groove through connectors. There are several anchor plates 5, and two anchor plates 5 are symmetrically arranged in groups of two at the bottom of the movable comb tooth plate 3. A rotating shaft 6 is movably arranged between the two anchor plates 5. The movable comb tooth plate 3 is hinged to the rotating shaft 6 through a displacement base 7. Rubber pads 8 are provided on the bottom of the movable comb tooth plate 3 and on the side wall facing the first beam body 1. Rubber pads 8 are also provided on the two side walls of the displacement base 7 and on the side wall of the rotating shaft 6 away from the displacement base 7. During construction, first, installation grooves are opened on the opposite sides of the first beam body 1 and the second beam body 2. The movable comb tooth plate 3 is fixed in the installation groove of the first beam body 1 through a connector, and the fixed comb tooth plate 4 is fixed in the installation groove of the second beam body 2. Finally, the two installation grooves are filled with concrete. When the bridge undergoes displacement due to external forces, the movable comb tooth plate 3 and the fixed comb tooth plate 4 can displace in the plane through their staggered tooth-like structures. Vertically, the movable comb tooth plate 3 can displace within a small range around the rotating shaft 6 (the rubber pad 8 provides the displacement space). Since the rotating shaft 6 is fixed to the bottom of the movable comb tooth plate 3 through the anchor plate 5, the anchor plate 5 at the fixed end of the rotating shaft 6 is fixed to the baffle 11 for preventing displacement, and then they are fixed together in the concrete, thus canceling the original anchor steel cover plate, avoiding the irregularity at the junction of the transition section concrete and the expansion device, the problem that the concrete at this place is prone to cracking, and also avoiding the damage of the expansion device.)

[0021] As Figure 2As shown, further, the connecting member includes embedded bars 9 and connecting bars 10. The embedded bars 9 are embedded into the installation groove. Installation holes are provided on both the movable comb-shaped plate 3 and the fixed comb-shaped plate 4. One end of the connecting bar 10 is connected to the installation hole through a nut, and the other end of the connecting bar 10 is connected to the embedded bar 9. (Specifically, when constructing the installation groove, the embedded bar 9 is embedded into the concrete of the installation groove. The connection method between the connecting bar 10 and the embedded bar 9 can be welding. When installing the movable comb-shaped plate 3, first connect the connecting bar 10 to the embedded bar 9, first pour and vibrate the concrete in the installation groove, and then screw the movable comb-shaped plate 3 to the connecting bar 10 through a nut.)

[0022] As Figure 2 shown, further, the embedded bar 9 has a concave structure, and the connecting bar 10 has an L-shaped structure. Specifically, both ends of the concave embedded bar 9 are embedded into the concrete of the installation groove. By embedding the inverted concave embedded bar 9, a mechanical anchoring effect is formed by the embedded bar 9 in the concrete. After the concrete hardens, the embedded bar 9 is not easily pulled out, improving the anchoring force of the embedded bar 9. At the same time, it can also better disperse the stress, avoiding stress concentration at a certain point, thereby improving the tensile strength of the overall structure. The L-shaped connecting bar 10 increases its contact surface with the concrete while also facilitating its connection with the movable comb-shaped plate 3 or the fixed comb-shaped plate 4.

[0023] As Figure 1 —2 shows, further, it also includes a baffle 11. The baffle 11 is provided between the side wall of the movable comb-shaped plate 3 and the first beam body 1 and between the fixed comb-shaped plate 4 and the second beam body 2. The baffle 11 is fixedly connected to one side of the anchor plate 5. (The baffle 11 is provided on both sides of the movable comb-shaped plate 3 and the fixed comb-shaped plate 4 close to the beam. The height of the baffle 11 is flush with the road surface. On the one hand, it can prevent the expansion joint device from being directly impacted by vehicles. On the other hand, it can cancel the concrete in the transition section, preventing the damage of the expansion joint device caused by the damage of the transition section concrete.)

[0024] As Figure 1 —2 shows, further, a sliding plate 12 is provided at the bottom of the fixing plate. Specifically, the sliding plate 12 has a low friction coefficient, which can effectively reduce the friction between the fixed comb-shaped plate 4 and the supporting structure below it. When the bridge undergoes temperature or load changes, the fixed comb-shaped plate 4 slides smoothly during displacement, and at the same time, it also avoids direct contact between the fixed comb-shaped plate 4 and the supporting structure, causing wear. In this embodiment, the sliding plate 12 extends below the movable comb-shaped plate 3, enabling the movable comb-shaped plate 3 to also move above the sliding plate 12.

[0025] As Figure 2 and 4As shown in the figure, further, it further includes a sealing strip 13. The sealing strip 13 is U-shaped and is arranged below the movable comb plate 3 through concrete. The sealing strip 13 can prevent moisture on the road surface from invading below it.

[0026] As Figure 2 shown in the figure, further, it further includes angle steels 14. There are two angle steels 14. Both ends of the sealing strip 13 are bent downward to form connection grooves, and one end of each of the two angle steels 14 is inserted into the two connection grooves respectively. The angle steels 14 can provide support when the sealing strip 13 is embedded in concrete, so that it always remains in the designed position and plays its sealing role.

[0027] As Figure 2 shown in FIG. -4, further, it further includes reinforcing ribs 15. There are several reinforcing ribs 15. The reinforcing ribs 15 are U-shaped, and both ends of each reinforcing rib 15 are fixedly connected to the side wall of the corresponding anchor plate 5. The reinforcing ribs 15 are located in the installation groove, and concrete will be poured into the installation groove in subsequent processes. The reinforcing ribs 15 can improve the overall strength of the concrete and also connect the anchor plate 5 and the concrete more firmly.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A telescopic device for a concrete comb plate without a transition section, characterized in that: include: A first beam body (1) and a second beam body (2), wherein mounting grooves are provided on opposite sides of the first beam body (1) and the second beam body (2); A movable comb plate (3) and a fixed comb plate (4), wherein the movable comb plate (3) and the fixed comb plate (4) are both connected to the bottom of the corresponding installation groove via a connecting piece; Anchor plates (5), the anchor plates (5) are provided in a plurality of pieces, two anchor plates (5) are symmetrically arranged in groups of two at the bottom of the movable comb plate (3), a rotating shaft (6) is movably arranged between the two anchor plates (5), and the movable comb plate (3) is hingedly connected to the rotating shaft (6) via a displacement base (7); The rubber pad (8) is provided on the bottom of the movable comb plate (3) and the side wall facing the first beam body (1), and the rubber pad (8) is also provided on the two side walls of the displacement base (7) and the side wall of the rotating shaft (6) away from the displacement base (7).

2. A transition-free concrete comb plate telescopic device as claimed in claim 1, characterized in that: The connecting piece comprises a pre-embedded rib (9) and a connecting rib (10); the pre-embedded rib (9) is pre-embedded in the mounting groove; mounting holes are provided on the movable comb plate (3) and the fixed comb plate (4); one end of the connecting rib (10) is connected to the mounting hole via a nut; and the other end of the connecting rib (10) is connected to the pre-embedded rib (9).

3. A transition-free concrete comb plate telescopic device as claimed in claim 2, characterized in that: The embedded ribs (9) are in a concave structure, and the connecting ribs (10) are in an L-shaped structure.

4. A transition-free concrete comb plate telescopic device as claimed in claim 1, characterized in that: It also comprises a baffle (11), which is provided between the side wall of the movable comb plate (3) and the first beam body (1) and between the fixed comb plate (4) and the second beam body (2), and is fixedly connected to one side of the anchor plate (5).

5. The telescopic device of a concrete comb plate without transition section as claimed in claim 1, characterized in that: A slide plate (12) is provided at the bottom of the fixed plate.

6. A transition-free concrete comb plate telescopic device as claimed in claim 1, characterized in that: It also includes a sealing strip (13) which is U-shaped and is arranged below the movable comb plate (3) through concrete.

7. A transition-free concrete comb plate telescopic device as claimed in claim 6, characterized in that: It also includes an angle steel (14), which is composed of two pieces. Both ends of the sealing strip (13) are bent downward to form a connecting groove, and one end of the two angle steels (14) is respectively inserted into the two connecting grooves.

8. The telescopic device of a concrete comb plate without transition section as claimed in claim 1, characterized in that: It also includes a plurality of reinforcing ribs (15), the reinforcing ribs (15) are U-shaped, and both ends of each reinforcing rib (15) are fixedly connected to the side wall of the corresponding anchor plate (5).

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