A type of arc-shaped expansion joint

Abstract

This utility model relates to an arc-shaped expansion joint, including a first connecting plate and a second connecting plate. The opposing surfaces of the first and second connecting plates are provided with matching and continuous arc surfaces, which are coaxially adapted to the arc contours of adjacent structures. The arc-shaped end faces of the first and second connecting plates are also provided with mounting grooves, within which a support member is provided. A metal cover plate is provided on the support member, and the bottom of the metal cover plate is filled with an elastic seal. This application combines a support member with a skeleton and multiple metal cover plates into a single unit, taking into account the advantages of both rigid and flexible materials. This effectively improves the deformation resistance and heavy-load capacity of the entire expansion joint, giving it high drainage capacity and greatly enhancing the overall protective performance of the arc-shaped expansion joint.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, specifically to an arc-shaped expansion joint. Background Technology

[0002] In the field of bridge engineering, expansion joints are key structural components that play an important role in adapting to the deformation of bridge structures caused by factors such as temperature changes, vehicle loads, and foundation settlement. Their performance directly affects the safety and service life of bridges.

[0003] Existing expansion joints typically use a single rubber material for filling, lacking rigid support. When subjected to heavy vehicle loads, the rubber strips are prone to plastic deformation, causing the metal cover to collapse and rainwater to seep into the structure through the gaps. Furthermore, the existing sealing structure of expansion joints is too simple, lacking multi-layered protection. If the surface drainage channels become clogged with debris, emergency drainage cannot be achieved, further exacerbating the risk of leakage.

[0004] In view of the above problems, there is an urgent need for an expansion joint structure that can be coaxially adapted to the arc-shaped structure, has both rigid support and elastic sealing functions, and has efficient drainage and convenient maintenance characteristics. Utility Model Content

[0005] Based on the above description, this utility model provides an arc-shaped expansion joint to solve the shortcomings of existing expansion joints that cannot simultaneously provide rigid support and elastic sealing, and lack an efficient drainage structure.

[0006] This utility model is achieved through the following technical solution:

[0007] An arc-shaped expansion joint includes a first connecting plate and a second connecting plate. The opposing surfaces of the first and second connecting plates are provided with matching and continuous arc surfaces, which are coaxially adapted to the arc contours of adjacent structures. The arc end faces of the first and second connecting plates are also provided with mounting grooves, and a support member is provided in the mounting groove. A metal cover plate is provided on the support member, and the top surface of the metal cover plate is flush with the top surface of the first and second connecting plates. The bottom of the metal cover plate is also filled with an elastic seal.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the mounting groove is provided in multiple rows, which are arranged at intervals. The support member is a continuous arc-shaped rubber strip with a metal skeleton embedded inside.

[0010] Furthermore, the cross-section of the support member is a T-shaped structure, and the horizontal section of the support member is inserted horizontally into the mounting groove, while the vertical section of the support member is in close contact with the side wall of the first connecting plate or the second connecting plate.

[0011] Furthermore, the vertical section of the support member is provided with limiting grooves at both the top and bottom, and the metal cover plates are arranged horizontally with both ends respectively attached to the bottom surface of the limiting groove.

[0012] Furthermore, each of the metal cover plates is provided with through holes, and an elastic washer is provided inside the through holes. The bottom surface of the limiting groove is also provided with bolt holes of the same size as the through holes. The metal cover plates and the connecting parts are locked together as a whole by bolts.

[0013] Furthermore, the top surface of the metal cover plate is provided with multiple drainage grooves, and the bottom surface of the drainage grooves is arranged inclined from the center of the metal cover plate to both sides.

[0014] Furthermore, waterstops are provided on both sides of the uppermost metal cover plate, which completely cover the gap between the metal cover plate and the first connecting plate and the second connecting plate.

[0015] Furthermore, the support member is provided with a storage cavity inside, and the side wall of the support member is provided with an injection hole that communicates with the storage cavity. The two ends of the support member are also provided with injection ports that communicate with the storage cavity.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0017] 1. This application improves upon the existing arc-shaped expansion joint by combining the support component with the skeleton with multiple metal cover plates into a whole, giving it high rigidity support, while also effectively utilizing the rubber covering the outside of the skeleton to achieve elastic support. This combines the advantages of both rigid and flexible materials, thereby effectively improving the deformation resistance and heavy load capacity of the entire expansion joint.

[0018] 2. In this application, a multi-layer steel plate combination is used to give it high drainage capacity. In this structure, each steel plate can be filled with glue by injection to fill the gap between the metal cover plate and the support, thereby forming a multi-layer waterproof structure and greatly improving the overall protective performance of the arc-shaped expansion joint. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the combined structure of the metal cover plate and the support member in this embodiment.

[0020] Figure 2This is a schematic diagram of the combined structure of the first connecting plate, the second connecting plate, and the support member in this embodiment.

[0021] Figure 3 This is a schematic diagram of the structure of the first connecting plate, the second connecting plate, and the elastic sealing element in this embodiment.

[0022] Figure 4 This is a schematic diagram of the support structure in Embodiment 1.

[0023] Figure 5 This is a schematic diagram of the multiple combination structure of the metal cover plate and the support member in this embodiment 2;

[0024] Figure 6 This is a schematic diagram of the combined structure of the first connecting plate, the second connecting plate, and the support member in this embodiment 2;

[0025] Figure 7 This is a schematic diagram of the structure of the first connecting plate, the second connecting plate, and the elastic sealing element in this embodiment 2;

[0026] The components are: 1. First connecting plate; 2. Second connecting plate; 3. Metal cover plate; 31. Drainage groove; 4. Support component; 5. Mounting groove; 6. Limiting groove; 7. Elastic sealing component; 8. Injection hole; 9. Injection port. Detailed Implementation

[0027] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0029] Combination Figure 1-7 As shown, an arc-shaped expansion joint includes:

[0030] The first connecting plate 1 and the second connecting plate 2 are the main structures of the entire expansion joint. Their opposite sides are provided with matching and continuous arc surfaces, and the arc surfaces are coaxially adapted to the arc contours of the adjacent structures. The arc surfaces of the first connecting plate 1 and the second connecting plate 2 are also provided with mounting grooves 5.

[0031] Support component 4 is designed as a connector that adapts to the curved surface. Its cross-section is a T-shaped structure and it is inserted into the mounting groove 5 to form a mounting base.

[0032] The metal cover plate 3 is horizontally arranged on the support member 4 and fixed by bolts, so that it forms an integral part with the support member 4, thereby enhancing the rigid support effect of the expansion joint.

[0033] The elastic seal 7 fills the gap between the first connecting plate 1 and the second connecting plate 2 and is located below the metal cover plate 3 to further improve the deformation resistance and sealing effect of the expansion joint. The main material is rubber, and the surrounding gaps are filled with polyurethane adhesive.

[0034] Example 1:

[0035] Specifically, in this embodiment, the mounting groove 5 provided on the arc-shaped sidewall of the first connecting plate 1 and the second connecting plate 2 also adopts a continuous arc-shaped surface. Therefore, the support member 4 and the metal cover plate 3 both adopt this continuous arc-shaped structure to ensure that the various components fit more tightly together.

[0036] In addition, in the above structure, the mounting groove 5 should be provided with two grooves, for example, with an attached groove. Figure 1-2 In the middle, there is a channel, so there are two support members 4 arranged opposite each other to provide stable support for the two metal cover plates 3.

[0037] Furthermore, in the above structure, in order to avoid the support member 4 being crushed when the cover plate is displaced downward due to the squeezing of the heavy-duty wheels on the top, the support member 4 should be set as a composite structure with an internal metal frame and an external elastic rubber material. It should be laid horizontally upside down so that its horizontal section can be inserted into the mounting groove 5 and fastened to the first connecting plate 1 and the second connecting plate 2, while the vertical section can be tightly attached to the first connecting plate 1 and the second connecting plate 2.

[0038] Limiting grooves 6 are provided at the top and bottom of the vertical section of the support member 4. The limiting grooves 6 form a stepped surface, and the height of the stepped surface should be half of the metal cover plate 3. Therefore, the vertical sections of the upper and lower support members 4 cooperate with each other, and the two limiting grooves 6 can cover the end of the entire metal cover plate 3, thereby tightening and fixing it.

[0039] Based on the above clamping structure, through holes and bolt holes should be provided on the surfaces of the limiting grooves 6 of the metal cover plate 3 and the support member 4. Nuts should be provided on the support member 4 located below. These nuts can be fixed to the support member 4 by vulcanization, or the inner walls of the holes on the metal frame can be made into threaded holes. All other through holes and bolt holes are equipped with elastic washers inside. The screws pass through the metal cover plate 3 and the support member 4 in sequence and are locked in place by the bottom thread, thus enabling the metal cover plate 3 and the support member 4 to form a whole. In this structure, the elastic modulus of the metal frame (200 GPa) significantly improves the support stiffness. Combined with the elastic deformation capacity of the rubber, the vertical deformation of the expansion joint is ≤3 mm when subjected to a load of 500 kN / m², reducing the risk of collapse by 60% compared to traditional single rubber supports.

[0040] Furthermore, to ensure the sealing effect of the above structure, a storage cavity should be provided inside the support member 4, and injection ports 9 for injecting adhesive should be provided on both sides of it. The side wall of the support member 4 is provided with injection holes 8. Therefore, the operator can inject polyurethane adhesive into it by side injection to fill the surrounding gaps, thereby enhancing the sealing between the metal cover plate 3 and the support member 4.

[0041] The surface of the metal cover plate 3 located above should be flush with the top surface of the first connecting plate 1 and the second connecting plate 2, and the gaps between them should be sealed with water-stop tape. At the same time, a certain amount of polyurethane adhesive should be filled into the gaps to enhance the sealing effect.

[0042] In the above structure, the metal cover plate 3, the elastic sealing element 7, and the top cover waterstop form a three-layer sealing system of "sealing element + metal cover plate 3 + waterstop". In this system, each metal cover plate 3 has a drainage groove 31 on its surface. Therefore, even if rainwater initially penetrates into the second layer of metal cover plate 3, it will be quickly transported to the drainage grooves 31 on both sides of the bridge through the drainage groove 31, preventing rainwater from continuing to penetrate inward. Especially in the case of heavy rain, this multi-layer drainage structure can quickly and effectively discharge rainwater to both sides, preventing rainwater from lingering on the metal cover plate 3 for a long time, thereby reducing the effect of rainwater infiltration.

[0043] Furthermore, based on this, the storage cavity inside the dynamic sealing compensation support 4 of the storage cavity is connected to the outside through the injection hole 8. During maintenance, sealant can be directly injected to fill the gaps caused by the aging of the rubber strip, thus eliminating the need to disassemble the entire structure. After adopting this design for the expansion joint of the roof of a large stadium, the sealant maintenance cost was reduced by 75% compared with the traditional solution, and the maintenance time was shortened from one month of downtime to 48 hours.

[0044] In this embodiment, the metal components are made of 304 stainless steel or aluminum alloy, and the rubber strips are made of weather-resistant EPDM rubber (service life ≥ 20 years). Combined with the UV protection coating of the waterstop, the expansion joint can maintain stable performance in harsh environments such as coastal salt spray, extreme cold (-40℃), and high temperature (+80℃), improving the environmental adaptability by 2 to 3 levels compared with the traditional solution.

[0045] Example 2:

[0046] Specifically, in this embodiment, the mounting slot 5 should have multiple slots, for example, with... Figure 5 As shown, there are 4 channels, so there are 4 support members 4, which are arranged in two groups opposite to each other to provide stable support for multiple metal cover plates 3 fixed on multiple support members 4.

[0047] Compared to the first embodiment, this sealed structure, which uses multiple steel plates connected to the support member 4 to form a whole, has a stronger load-bearing capacity. It is mainly suitable for use on roads and bridges with heavy trucks and large trucks. It can not only effectively provide protection, but also enhance drainage by using this multi-layer structure to ensure that rainwater can be completely isolated and prevent it from entering the interior and causing corrosion.

[0048] Furthermore, the aforementioned structure can employ a segmented and modular design, namely, multiple mounting slots 5 and segmented metal cover plates 3, allowing the support component 4 to be disassembled and replaced in 2-3 meter sections. When a section of the rubber strip ages, it can be removed for repair simply by loosening the bolts of the corresponding section, reducing material waste by 60% and construction time by 80% compared to the traditional overall replacement solution.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. An arc-shaped expansion joint, characterized in that, It includes a first connecting plate (1) and a second connecting plate (2), and the opposite sides of the first connecting plate (1) and the second connecting plate (2) are provided with matching and continuous arc surfaces, and the arc surfaces are coaxially adapted to the arc contours of adjacent structures; the arc end faces of the first connecting plate (1) and the second connecting plate (2) are also provided with mounting grooves (5), the mounting grooves (5) are provided with support members (4), the support members (4) are provided with metal cover plates (3), and the top surface of the metal cover plates (3) is flush with the top surface of the first connecting plate (1) and the second connecting plate (2), and the bottom of the metal cover plates (3) is also filled with elastic seals (7).

2. The arc-shaped expansion joint according to claim 1, characterized in that, The mounting groove (5) is provided with multiple grooves, which are arranged at intervals. The support member (4) is a continuous arc-shaped rubber strip with a metal skeleton embedded inside.

3. The arc-shaped expansion joint according to claim 2, characterized in that, The cross-section of the support member (4) is a T-shaped structure, and the horizontal section of the support member (4) is inserted horizontally into the mounting groove (5). The vertical section of the support member (4) is closely fitted with the side wall of the first connecting plate (1) or the second connecting plate (2).

4. The arc-shaped expansion joint according to claim 3, characterized in that, The vertical section of the support member (4) is provided with a limiting groove (6) at both the top and bottom. The metal cover plate (3) is arranged horizontally and its two ends are respectively attached to the bottom surface of the limiting groove (6).

5. The arc-shaped expansion joint according to claim 4, characterized in that, The metal cover plate (3) is provided with through holes, and the through holes are provided with elastic washers. The bottom surface of the limiting groove (6) is also provided with bolt holes of the same size as the through holes. The metal cover plate (3) and the connecting piece are locked together as a whole by bolts.

6. The arc-shaped expansion joint according to claim 5, characterized in that, The top surface of the metal cover plate (3) is also provided with multiple drainage grooves (31), and the bottom surface of the drainage grooves (31) is arranged inclined from the center of the metal cover plate (3) to both sides.

7. The arc-shaped expansion joint according to claim 6, characterized in that, Waterstops are provided on both sides of the metal cover plate (3) located at the top, and the waterstops completely cover the gap between the metal cover plate (3) and the first connecting plate (1) and the second connecting plate (2).

8. The arc-shaped expansion joint according to claim 7, characterized in that, The support member (4) is also provided with a storage cavity inside. The side wall of the support member (4) is provided with a glue injection hole (8) and communicates with the storage cavity. The two ends of the support member (4) are respectively provided with injection ports (9) and communicate with the storage cavity.

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