Small-span expansion joint structure
By designing pre-embedded steel cages and cantilever beam steel structures at bridge expansion joints, combined with elastic support strips and steel clip limiting components, the buffering and stability issues of small-span expansion joint structures under bridge pressure were solved, achieving improved buffering effect and stability of the rubber strips under edge beam pressure.
Patent Information
- Application Number
- CN202520419576.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing small-span expansion joint structures lack effective buffering when bridges are under pressure, and the rubber strips are not securely fixed, which can easily lead to noise and unevenness when vehicles are driving.
The structure employs a pre-embedded steel cage and cantilever beam steel reinforcement, combined with elastic support strips, rubber strips, and steel buckle limiting components. Through the design of inserts, screw rods, and arc-shaped grooves, it achieves elastic support and stable connection, ensuring buffering when the edge beam is under pressure and improving the fixing stability of the rubber strips.
It provides effective cushioning when the bridge side beams are under pressure, reduces noise, improves the stability of the rubber strip, and ensures smooth and stable vehicle driving.
Smart Images
Figure CN223951604U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to expansion joint technical field, especially, relate to a small span expansion joint structure. BACKGROUND
[0002] In order to meet the requirement of bridge deck deformation, expansion joint is usually arranged between two beam ends, between beam end and abutment or hinge position of bridge, and expansion joint can freely expand in two directions parallel and perpendicular to bridge axis, is firm and reliable, and should be smooth, without sudden jump and noise when vehicle drives, so that the utility model discloses a small span expansion joint structure, and the elastic steel body is supported below the side beam, provides buffer when the side beam is compressed, and the rubber strip is fixed by steel buckle, compared with groove limiting, and the stability is better. SUMMARY
[0003] The utility model discloses a small span expansion joint structure, has when the side beam is compressed provides buffer, and the rubber strip adopts steel buckle fixed, compared with groove limiting, and the stability is better's advantage, to solve the background technical problem of above.
[0004] The utility model discloses a small span expansion joint structure, which comprises a plurality of embedded steel cages embedded in the bridge expansion joint and a plurality of cantilever beams, two symmetrical support side beams are arranged at the bridge expansion joint, a load-bearing plate is welded at the top of the plurality of cantilever beams, an elastic support strip plate is installed at the top of the load-bearing plate, an installation assembly is arranged between the elastic support strip plate and the load-bearing plate, an arc-shaped notch is formed in the bottom of the support side beam, the tip of the elastic support strip plate extends into the inner cavity of the arc-shaped notch, a rubber strip is arranged between the two load-bearing plates, and a limiting assembly is arranged between the rubber strip and the load-bearing plate.
[0005] Preferably, the installation assembly comprises an insertion strip fixedly connected to both ends of the elastic support strip plate, and the top of the load-bearing plate is provided with an insertion slot for the insertion of the insertion strip.
[0006] Preferably, a plurality of through holes are formed in the insertion strip, a plurality of threaded holes aligned with the through holes are formed in the load-bearing plate, a screw rod is arranged in the inner cavities of the through holes and the threaded holes, and the inner wall of the threaded hole is threadedly connected with the screw rod.
[0007] Preferably, the limiting assembly comprises a vertical plate fixedly connected to the top of the load-bearing plate, both ends of the rubber strip are arranged on the surface of the vertical plate, and a plurality of elastic steel buckles are sleeved on the surfaces of both ends of the rubber strip.
[0008] Preferably, an arc-shaped protrusion is arranged on the elastic steel buckle, and an arc-shaped limiting groove matched with the vertical plate is formed in one side of the vertical plate.
[0009] The utility model discloses a beneficial effect is:
[0010] 1, the utility model discloses a mounting assembly is installed in the top of the load bearing plate elastic support strip plate, then the load bearing plate is welded on a plurality of roof beam reinforcement, then the rubber strip is installed between two load bearing plates through the limiting component, then the arc-shaped notch of support edge beam bottom is put on the elastic support strip plate, and the concrete is poured and solidified, and the bottom of support edge beam is supported through the arc-shaped notch, and the purpose that the stability is better is reached when providing the buffer when the edge beam is compressed, and the rubber strip is fixed with steel buckle, compared with the groove limiting,
[0011] 2, the utility model discloses the cooperation of arc-shaped projection and arc-shaped limiting groove, when the elastic steel buckle is sleeved on the surface of rubber strip and vertical plate, the arc-shaped projection on the elastic steel buckle will enter the inner chamber of arc-shaped limiting groove, and the elastic steel buckle can be limited from the surface of vertical plate and rubber strip. DRAWINGS
[0012] The above and / or other aspects of the utility model will become more apparent and more readily appreciated through consideration of the following detailed description, taken in conjunction with the accompanying drawings, which are merely illustrative and are not intended to limit the scope of the utility model, wherein:
[0013] Figure 1 It is a structural schematic diagram of one embodiment of the utility model;
[0014] Figure 2 It is a three-dimensional schematic diagram of the support edge beam of one embodiment of the utility model;
[0015] Figure 3 It is a three-dimensional split schematic diagram of the load bearing plate and elastic support strip plate of one embodiment of the utility model;
[0016] Figure 4 It is a three-dimensional schematic diagram of the load bearing plate and rubber strip of one embodiment of the utility model.
[0017] In the drawings, the component list represented by each sign is as follows:
[0018] 1, embedded steel reinforcement cage, 2, roof beam reinforcement, 3, support edge beam, 4, load bearing plate, 5, elastic support strip plate, 6, arc-shaped notch, 7, rubber strip, 8, mounting assembly, 81, insert strip, 82, insert groove, 83, perforation, 84, screw hole, 85, screw rod, 9, limiting component, 91, vertical plate, 92, elastic steel buckle, 93, arc-shaped projection, 94, arc-shaped limiting groove. DETAILED DESCRIPTION
[0019] In the following, the embodiment of the small-span expansion joint structure of the utility model will be described with reference to the drawings.
[0020] Figures 1-4The small-span expansion joint structure of the embodiment of the utility model shows, it includes multiple pre -buried reinforcement cage 1 and multiple roof beam reinforcement 2 that are pre -buried at bridge expansion joint, bridge expansion joint is provided with two symmetrical support edge beam 3, the top of multiple roof beam reinforcement 2 is welded with bearing plate 4, the top of bearing plate 4 is installed with elastic support strip plate 5, and installation assembly 8 is arranged between elastic support strip plate 5 and bearing plate 4, installation assembly 8 includes plug 81 that is fixedly connected in the both ends of elastic support strip plate 5, the top of bearing plate 4 is all provided with the plug groove 82 for the plug 81 insertion, multiple perforation 83 are set up on plug 81, multiple screw hole 84 that are aligned with perforation 83 are set up on bearing plate 4, and screw rod 85 is threaded with the inner chamber of perforation 83 and screw hole 84, and the inner wall of screw hole 84 is screwed with screw rod 85, the bottom of support edge beam 3 is provided with arc-shaped slot 6, and the tip of elastic support strip plate 5 extends to the inner chamber of arc-shaped slot 6, and rubber strip 7 is arranged between the two bearing plates 4, and limiting assembly 9 is arranged between rubber strip 7 and bearing plate 4, limiting assembly 9 includes vertical plate 91 that is fixedly connected the top of bearing plate 4, the both ends of rubber strip 7 are all set up on the surface of vertical plate 91, multiple elastic steel buckles 92 are all set up on the surface of the both ends of rubber strip 7, arc-shaped protrusion 93 is set up on elastic steel buckle 92, and arc-shaped limiting groove 94 that is adapted to vertical plate 91 is set up on the side of vertical plate 91, by the cooperation of arc-shaped protrusion 93 and arc-shaped limiting groove 94, when elastic steel buckle 92 is sleeved on the surface of rubber strip 7 and vertical plate 91, arc-shaped protrusion 93 on elastic steel buckle 92 will enter the inner chamber of arc-shaped limiting groove 94, and the arc-shaped protrusion 93 on elastic steel buckle 92 can limit elastic steel buckle 92 from slipping off the surface of vertical plate 91 and rubber strip 7.
[0021] Working principle: during the construction of the utility model, the plug 81 on the elastic support strip plate 5 is inserted into the inner chamber of the plug groove 82 on the bearing plate 4, then the screw rod 85 is taken through the screw hole 84 and the perforation 83 and is screwed into the inner chamber of the screw hole 84, the elastic support strip plate 5 is installed on the top of the bearing plate 4, then the bearing plate 4 is welded on the multiple roof beam reinforcement 2, then the both ends of the rubber strip 7 are set up on the vertical plate 91, and the elastic steel buckle 92 is taken and is sleeved on the rubber strip 7 and the vertical plate 91, so that the arc-shaped protrusion 93 on the elastic steel buckle 92 enters the inner chamber of the arc-shaped limiting groove 94 and is limited, the rubber strip 7 can be installed between the two bearing plates 4, then the arc-shaped slot 6 at the bottom of the support edge beam 3 is set up on the elastic support strip plate 5, and the concrete is poured and solidified, the bottom of the support edge beam 3 is elastically supported through the arc-shaped slot 6, which plays a certain noise reduction effect.
[0022] In summary: the small span expansion joint structure, through the installation component 8 will be installed in the top of the elastic support strip plate 5 in the bearing plate 4, then the bearing plate 4 is welded on the multiple cantilever beam reinforcement 2, then the rubber strip 7 is installed between the two bearing plates 4 through the limiting component 9, then the arc-shaped groove 6 at the bottom of the support edge beam 3 is placed on the elastic support strip plate 5, and the concrete is poured and solidified. The bottom of the support edge beam 3 is elastically supported through the arc-shaped groove 6, which can provide buffer when the edge beam is compressed. Moreover, the rubber strip is fixed by steel buckle, which is more stable than the groove limiting.
Claims
1. A small-span expansion joint structure, characterized in that, The structure includes multiple pre-embedded steel cages (1) and multiple cantilever steel bars (2) embedded in the bridge expansion joint. Two symmetrical supporting side beams (3) are provided at the bridge expansion joint. A bearing plate (4) is welded to the top of the multiple cantilever steel bars (2). An elastic support strip plate (5) is installed on the top of the bearing plate (4). An installation component (8) is provided between the elastic support strip plate (5) and the bearing plate (4). An arc-shaped groove (6) is opened at the bottom of the supporting side beam (3). The tip of the elastic support strip plate (5) extends into the inner cavity of the arc-shaped groove (6). A rubber strip (7) is provided between the two bearing plates (4). A limit component (9) is provided between the rubber strip (7) and the bearing plate (4).
2. The small-span expansion joint structure according to claim 1, characterized in that, The mounting assembly (8) includes inserts (81) fixedly connected to both ends of the elastic support strip plate (5), and the top of the bearing plate (4) is provided with slots (82) for inserts (81) to be inserted.
3. The small-span expansion joint structure according to claim 2, characterized in that, The insert (81) has multiple through holes (83), and the bearing plate (4) has multiple threaded holes (84) aligned with the through holes (83). A screw rod (85) passes through the inner cavity of the threaded hole (84) and the through hole (83), and the inner wall of the threaded hole (84) is threadedly connected to the screw rod (85).
4. The small-span expansion joint structure according to claim 3, characterized in that, The limiting component (9) includes a vertical plate (91) fixedly connected to the top of the bearing plate (4), both ends of the rubber strip (7) are attached to the surface of the vertical plate (91), and multiple elastic steel buckles (92) are fitted on the surface of both ends of the rubber strip (7).
5. The small-span expansion joint structure according to claim 4, characterized in that, The elastic steel buckle (92) is provided with an arc-shaped protrusion (93), and an arc-shaped limiting groove (94) adapted to the upright plate (91) is provided on one side.