Shallow-buried elastic composite steel damping seamless telescopic device
By installing an elastic composite steel damping seamless expansion joint in the bridge expansion joint, the problems of limited installation depth, poor replaceability, insufficient seismic performance, and poor adaptability to multi-directional displacement have been solved. This has resulted in a bridge expansion joint that is easy to replace, waterproof and reliable, seismic and shock-absorbing, and capable of multi-directional displacement, thus improving the traffic comfort and safety of urban bridges.
Patent Information
- Application Number
- CN202610298588.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-12
- Publication Date
- 2026-07-07
AI Technical Summary
Existing bridge expansion joints have shortcomings in terms of limited installation depth, poor replaceability, insufficient seismic performance, poor adaptability to multi-directional displacement, contradiction between waterproofing and durability, and poor driving comfort. In particular, they are difficult to meet the medium expansion and contraction requirements of 80-320mm in urban bridges.
A shallow-buried elastic composite steel damping seamless expansion joint is adopted. Two platforms are set inside the expansion joint, and elastic expansion mechanisms are installed on the inner side of the platforms, including fixed connecting plates, pressure plates, connecting bolts and auxiliary components. The combination of Ω-shaped steel plates and elastic fillers achieves multi-directional displacement adaptation and good waterproof effect. The double-layer structure of the first Ω-shaped steel plate and the second Ω-shaped steel plate enhances the seismic performance.
It enables easy replacement under shallow-buried installation conditions, provides good traffic comfort and waterproofing, adapts to complex multi-directional displacement requirements, and provides effective seismic and damping protection, reducing maintenance and replacement costs and improving the traffic quality of urban bridges.
Smart Images
Figure CN122344858A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bridge engineering technology, and in particular to a shallow-buried elastic composite steel damping seamless expansion joint. Background Technology
[0002] Bridge expansion joints are important components connecting the superstructure of bridges. Their main function is to accommodate the displacement of the bridge beam ends caused by temperature changes, concrete shrinkage and creep, and loads, while ensuring smooth vehicle passage and waterproofing of the bridge deck.
[0003] Currently, commonly used bridge expansion joints mainly include: (1) Modular expansion joint: It adopts a multi-slot structure composed of a middle beam, a cross beam and a support system. It has a large displacement adaptability, but it has disadvantages such as complex structure, many parts, easy damage, difficult maintenance, and high traffic noise. In addition, the installation depth generally needs to be more than 250mm, which requires a high bridge structure height.
[0004] (2) Comb plate telescopic device: displacement compensation is achieved by interlocking the comb plates. The installation is relatively simple, but there are gaps between the comb teeth, resulting in poor ride smoothness and easy vehicle jumping. In addition, the waterproof performance is insufficient, and the root of the comb teeth is prone to fatigue fracture.
[0005] (3) Rubber-type expansion joint: It absorbs displacement by deforming rubber elastomer. It has the characteristics of simple structure and low cost. However, rubber material is prone to aging, has a short service life, poor adaptability to large displacement, and lacks an effective damping energy dissipation mechanism.
[0006] (4) Seamless expansion joint: The bridge deck is continuous by using elastomer filling, which provides better driving comfort. However, the displacement of traditional seamless expansion joints is limited (generally less than 60mm), and there is a lack of reliable beam end restraint and seismic measures.
[0007] Limitations of existing technology: For bridge expansion joints with a medium expansion range of 80-320mm, existing technology has the following shortcomings: Limited installation depth: Existing urban bridges or bridges built in the early stages often have a reserved installation groove depth of less than 200mm. Traditional modular expansion joints are difficult to apply due to insufficient installation depth. Moreover, chiseling out and rebuilding the concrete at the beam end is not only costly, but also affects structural safety.
[0008] Poor replaceability: Existing expansion joints are mostly fixed to pre-embedded parts of the beam or cast-in-place. Once damaged, they need to be completely removed and replaced, resulting in long construction periods, significant traffic disruption, and high maintenance costs. Insufficient seismic performance: Conventional expansion joints lack effective damping and energy dissipation mechanisms, making it difficult to provide beam end damping and anti-fall protection under seismic loads. The expansion joints themselves are also prone to damage due to severe displacement.
[0009] Poor adaptability to multi-directional displacement: Bridges often experience lateral, vertical, and torsional displacements under temperature, load, and seismic action, and traditional expansion joints struggle to adapt to these complex spatial displacement requirements. Conflict between waterproofing and durability: Increasing structural complexity to achieve waterproofing performance often leads to difficulties in maintenance and replacement; conversely, easily replaceable structures cannot guarantee long-term waterproofing reliability. Inadequate driving comfort: Gaps or height differences in expansion joints cause vehicle bumps and jolts, affecting the traffic quality of urban bridges and generating noise pollution.
[0010] Therefore, there is an urgent need to develop a seamless telescopic device that is suitable for shallow-buried installation conditions, has good replaceability, excellent seismic and damping performance, multi-directional displacement adaptability, and ensures driving comfort and waterproof reliability. To this end, we propose a shallow-buried elastic composite steel damping seamless telescopic device. Summary of the Invention
[0011] The purpose of this invention is to provide a shallow-buried elastic composite steel damping seamless telescopic device to solve the problems mentioned in the background art.
[0012] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A shallow-buried elastic composite steel damping seamless expansion joint includes two platforms installed inside the expansion joint. The inner side of each platform is equipped with an elastic expansion mechanism. The elastic expansion mechanism includes a fixed connecting plate, a pressure plate, connecting bolts, and auxiliary components. The top of each platform is fixed with a fixed connecting plate and a pressure plate by connecting bolts. An auxiliary component is installed between the fixed connecting plate and the pressure plate.
[0013] Preferably, the auxiliary component includes a first Ω-shaped steel plate and a first elastic filler, the first Ω-shaped steel plate is fixed between the fixed connecting plate and the pressure plate by connecting bolts, and the first elastic filler is cast between the platform and the first Ω-shaped steel plate.
[0014] Preferably, the auxiliary component further includes a second elastic filler, and the second elastic filler is disposed on the inner side of the first Ω-shaped steel plate.
[0015] Preferably, multiple ear plates are evenly distributed and fixed on the sides of the two fixed connecting plates that are far apart from each other.
[0016] Preferably, both ends of the bottom of the first Ω-shaped steel plate are integrally fixed with a straight portion, and one end of the straight portion is fixed with a vertical portion. The top of the first Ω-shaped steel plate is provided with a curved portion, and both ends of the curved portion are integrally fixed with an arc-shaped portion. A bend is provided at the connection between the arc-shaped portion and the vertical portion.
[0017] Preferably, the two ends of the curved portion bend towards the arc-shaped portion, and the bottom of the arc-shaped portion bends towards the vertical portion.
[0018] Preferably, a second Ω-shaped steel plate is inserted through the inner side of the first Ω-shaped steel plate.
[0019] Preferably, an outer filler is used to fill the space between the first Ω-shaped steel plate and the second Ω-shaped steel plate, and an inner filler is used to fill the inner side of the second Ω-shaped steel plate.
[0020] Preferably, both the first Ω-shaped steel plate and the second Ω-shaped steel plate are made of stainless steel.
[0021] Preferably, both ends of the inner sides of the first Ω-shaped steel plate and the second Ω-shaped steel plate are fixed with connecting stiffeners, and multiple reinforcing stiffeners are evenly distributed and fixed on the inner sides of the first Ω-shaped steel plate and the second Ω-shaped steel plate at positions away from the connecting stiffeners.
[0022] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.
[0023] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects: This invention, through the structural design of the elastic telescopic mechanism, makes the device easy to replace. By casting a first elastic filler between the platform and the first Ω-shaped steel plate, it achieves good traffic comfort and waterproof effect. This invention is applicable to urban traffic and the replacement and installation of telescopic ranges of 80-320mm with a reserved telescopic installation groove depth of less than 200mm. It can also achieve good seismic resistance, vibration reduction, multi-directional displacement performance, beam end damping, and anti-falling beam effect. Moreover, during maintenance and replacement, only the first elastic filler needs to be removed to complete the replacement conveniently and quickly. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the connection structure of the pressure plate and connecting bolts of the present invention; Figure 3 This is a schematic diagram of the connection structure between the fixed connecting plate and the ear plate of the present invention; Figure 4 This is a schematic cross-sectional view of the first Ω-shaped steel plate and the second Ω-shaped steel plate of the present invention; Figure 5 This is a schematic diagram of the connection structure between the first Ω-shaped steel plate and the reinforcing rib plate of the present invention.
[0026] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Expansion joint; 2. Platform; 3. Fixed connecting plate; 4. Pressure plate; 5. Connecting bolt; 6. First Ω-shaped steel plate; 7. Straight section; 8. First elastic filler; 9. Second elastic filler; 10. Ear plate; 11. Bend at the inflection point; 12. Second Ω-shaped steel plate; 13. External filler; 14. Internal filler; 15. Curved section; 16. Arc-shaped section; 17. Vertical section; 18. Connecting stiffener; 19. Reinforcing stiffener. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0028] Example 1 Reference Figure 1-4 A shallow-buried elastic composite steel damping seamless expansion joint device includes two platforms 2 set in an expansion joint 1. The inner side of the platform 2 is equipped with an elastic expansion mechanism. The elastic expansion mechanism includes a fixed connecting plate 3, a pressure plate 4, connecting bolts 5 and auxiliary components. The top of the platform 2 is fixed with the fixed connecting plate 3 and the pressure plate 4 by the connecting bolts 5. The auxiliary components are assembled between the fixed connecting plate 3 and the pressure plate 4. The expansion joint 1 is a bridge and road installation groove with a depth of less than 200mm and an expansion range of 80-320mm.
[0029] The auxiliary components include a first Ω-shaped steel plate 6 and a first elastic filler 8. A first Ω-shaped steel plate 6 is fixed between the fixed connecting plate 3 and the pressure plate 4 by connecting bolts 5. The first elastic filler 8 is poured between the platform 2 and the first Ω-shaped steel plate 6. After the first Ω-shaped steel plate 6 is installed, the first elastic filler 8 made of elastic material is poured between the platform 2 and the first Ω-shaped steel plate 6 to achieve good traffic comfort and waterproof effect.
[0030] The auxiliary components also include a second elastic filler 9. The inner side of the first Ω-shaped steel plate 6 is provided with the second elastic filler 9. By setting the second elastic filler 9, the external impact pressure on the first Ω-shaped steel plate 6 can be relieved and buffered, so as to prevent the first Ω-shaped steel plate 6 from collapsing and failing to rebound and recover.
[0031] Multiple ear plates 10 are evenly distributed and fixed on the side of the two fixed connecting plates 3 that are far apart from each other. By setting the ear plates 10, the fixed connecting plates 3 can be reinforced, and the stability of the first elastic filler 8 after pouring can be increased, providing a certain support strength for the entire structure.
[0032] The bottom of the first Ω-shaped steel plate 6 has a straight section 7 integrally fixed at both ends, and a vertical section 17 is fixed at one end of each straight section 7. The top of the first Ω-shaped steel plate 6 has a curved section 15, and both ends of the curved section 15 have an arc-shaped section 16 integrally fixed. A bend 11 is provided at the connection between the arc-shaped section 16 and the vertical section 17. The two ends of the curved section 15 bend towards the arc-shaped section 16, and the bottom of the arc-shaped section 16 bends towards the vertical section 17. When the first elastic filler 8 and the first Ω-shaped steel plate 6 are subjected to external impact pressure, the impact pressure is transmitted to the arc-shaped section 16 through the curved section 15. At the same time, the curved section 15 deforms, performing primary stress relief. Then, the force continues to be transmitted downward through the arc-shaped section 16, and at the same time, the arc-shaped section 16 deforms, performing secondary stress relief. Meanwhile, the second elastic filler 9 inside the first Ω-shaped steel plate 6 is squeezed and deformed, performing stress relief again.
[0033] Example 2 Further optimizations to Example 1, specifically, such as... Figure 4 As shown, a second Ω-shaped steel plate 12 is inserted through the inner side of the first Ω-shaped steel plate 6. An outer filler 13 is filled between the first Ω-shaped steel plate 6 and the second Ω-shaped steel plate 12, and an inner filler 14 is filled inside the second Ω-shaped steel plate 12. Both the first Ω-shaped steel plate 6 and the second Ω-shaped steel plate 12 are made of stainless steel. By using double-layered stainless steel plates, that is, by the cooperation of the first Ω-shaped steel plate 6 and the second Ω-shaped steel plate 12, with an outer filler 13 made of elastic material between them and an inner filler 14 made of elastic material inside the second Ω-shaped steel plate 12, it is suitable for applications requiring greater load-bearing capacity and greater expansion and contraction displacement. In other embodiments, the first Ω-shaped steel plate 6 and the second Ω-shaped steel plate 12 are generally custom-made as a whole according to the bridge width.
[0034] Example 3 Example 2 was further optimized, specifically, as follows: Figure 5 As shown, connecting stiffeners 18 are fixed at both ends of the inner side of the first Ω-shaped steel plate 6 and the second Ω-shaped steel plate 12. Multiple reinforcing stiffeners 19 are evenly distributed and fixed on the inner side of the first Ω-shaped steel plate 6 and the second Ω-shaped steel plate 12 at positions offset from the connecting stiffeners 18. C-shaped connecting stiffeners 18 and reinforcing stiffeners 19 are added to the inner side of the first Ω-shaped steel plate 6 and the second Ω-shaped steel plate 12. The connecting stiffeners 18 are used to extend the connection and strengthen the joint when the length of this telescopic device exceeds 6 meters.
[0035] In summary: This invention addresses the following technical problems and deficiencies in existing technologies: For bridge expansion joints with a medium expansion range of 80-320mm, existing technologies suffer from the following shortcomings: Limited installation depth: Existing urban bridges or bridges built in earlier periods often have installation grooves less than 200mm deep. Traditional modular expansion joints are unsuitable due to insufficient installation depth, and rebuilding the beam end concrete is not only costly but also compromises structural safety. Poor replaceability: Existing expansion joints are mostly fixed to embedded parts in the beam or cast-in-place. Once damaged, they require complete removal and replacement, resulting in long construction periods, significant traffic disruption, and high maintenance costs. Insufficient seismic performance: Conventional expansion joints lack effective damping and energy dissipation mechanisms, making it difficult to provide beam end damping and anti-fall protection under earthquakes. The expansion joints themselves are also prone to damage due to severe displacement. Poor adaptability to multi-directional displacement: Bridges often experience lateral, vertical, and torsional displacements under temperature, load, and seismic forces. Traditional expansion joints struggle to adapt to complex spatial displacement requirements. The contradiction between waterproofing and durability: Increasing structural complexity to achieve waterproofing performance often leads to difficulties in maintenance and replacement; conversely, easily replaceable structures cannot guarantee long-term waterproofing reliability. Poor driving comfort: Gaps or height differences in expansion joints cause vehicle bumps and jolts, affecting the traffic quality of urban bridges and generating noise pollution. By adopting the technical solutions of the above embodiments and through the aforementioned settings, this application can certainly solve the above technical problems and achieve the following technical effects: This invention, through the structural design of the elastic telescopic mechanism, makes the device easy to replace. By casting the first elastic filler 8 between the platform 2 and the first Ω-shaped steel plate 6, good traffic comfort and waterproof effect are achieved. This invention is applicable to urban traffic and the replacement and installation of telescopic ranges of 80-320mm with a reserved telescopic installation groove depth of less than 200mm. It can also achieve good seismic resistance, shock absorption, multi-directional displacement performance, beam end damping, and anti-falling beam effect. Moreover, during maintenance and replacement, only the first elastic filler 8 needs to be removed to complete the replacement conveniently and quickly.
[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0037] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention 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 specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.
Claims
1. A shallow-buried elastic composite steel damping seamless telescopic device, characterized in that, It includes two platforms (2) set in the expansion joint (1). The inner side of the platform (2) is equipped with an elastic expansion mechanism. The elastic expansion mechanism includes a fixed connecting plate (3), a pressure plate (4), a connecting bolt (5) and auxiliary components. The top of the platform (2) is fixed with a fixed connecting plate (3) and a pressure plate (4) by connecting bolts (5). An auxiliary component is assembled between the fixed connecting plate (3) and the pressure plate (4).
2. The shallow-buried elastic composite steel damping seamless telescopic device according to claim 1, characterized in that, The auxiliary component includes a first Ω-shaped steel plate (6) and a first elastic filler (8). The first Ω-shaped steel plate (6) is fixed between the fixed connecting plate (3) and the pressure plate (4) by connecting bolts (5). The first elastic filler (8) is poured between the platform (2) and the first Ω-shaped steel plate (6).
3. The shallow-buried elastic composite steel damping seamless telescopic device according to claim 2, characterized in that, The auxiliary component also includes a second elastic filler (9), which is provided on the inner side of the first Ω-shaped steel plate (6).
4. The shallow-buried elastic composite steel damping seamless telescopic device according to claim 2, characterized in that, Multiple ear plates (10) are evenly distributed and fixed on the side of each of the two fixed connecting plates (3) that are far apart from each other.
5. A shallow-buried elastic composite steel damping seamless telescopic device according to claim 3, characterized in that, The bottom ends of the first Ω-shaped steel plate (6) are integrally fixed with a straight part (7), and one end of the straight part (7) is fixed with a vertical part (17). The top of the first Ω-shaped steel plate (6) is provided with a curved part (15), and both ends of the curved part (15) are integrally fixed with an arc-shaped part (16). The connection between the arc-shaped part (16) and the vertical part (17) is provided with a bend (11).
6. The shallow-buried elastic composite steel damping seamless telescopic device according to claim 5, characterized in that, The two ends of the curved portion (15) bend toward the arc portion (16), and the bottom of the arc portion (16) bends toward the vertical portion (17).
7. A shallow-buried elastic composite steel damping seamless telescopic device according to claim 5, characterized in that, A second Ω-shaped steel plate (12) is inserted through the inner side of the first Ω-shaped steel plate (6).
8. A shallow-buried elastic composite steel damping seamless telescopic device according to claim 7, characterized in that, An outer filler (13) is filled between the first Ω-shaped steel plate (6) and the second Ω-shaped steel plate (12), and an inner filler (14) is filled inside the second Ω-shaped steel plate (12).
9. A shallow-buried elastic composite steel damping seamless telescopic device according to claim 7, characterized in that, Both the first Ω-shaped steel plate (6) and the second Ω-shaped steel plate (12) are made of stainless steel.
10. A shallow-buried elastic composite steel damping seamless telescopic device according to claim 9, characterized in that, Both ends of the inner sides of the first Ω-shaped steel plate (6) and the second Ω-shaped steel plate (12) are fixed with connecting stiffeners (18), and multiple reinforcing stiffeners (19) are evenly distributed and fixed on the inner sides of the first Ω-shaped steel plate (6) and the second Ω-shaped steel plate (12) at positions away from the connecting stiffeners (18).