Modular multi-directional compression-resistant bridge expansion joint

Abstract

The utility model discloses a kind of modular multi-directional compression-resistant bridge expansion joint, it is related to bridge appliance technical field, including base surface layer, the upper wall surface of base surface layer is detachably connected with positioning frame, the two sides of positioning frame are respectively provided with guide sliding slot, positioning plate is connected in guide sliding slot by adapter bar, load-bearing frame is detachably connected on positioning plate, buffering structure for realizing that positioning plate rotates around guide sliding slot or resets after sliding along guide sliding slot is fixedly installed between positioning frame and positioning plate, the utility model is connected with glue injection sealing design and realizes modular assembly, fragile piece and support piece are separated, realize local damage quick replacement, the oxidation corrosion of connecting place is delayed by glue injection sealing, increase the service life of modularization, solve the problem that the existing bridge expansion joint needs to be replaced as a whole after damage, cause unnecessary waste.

Description

Technical Field

[0001] This utility model relates to the field of bridge equipment technology, specifically a modular multi-directional compressive bridge expansion joint. Background Technology

[0002] Bridge expansion joints are structural devices installed to accommodate displacements in bridge structures caused by temperature changes, vehicle loads, foundation settlement, etc. They are located at the joints between the bridge beams and abutments or beams. Their core function is to allow slight longitudinal, lateral, or vertical movement of the structure while ensuring smooth driving. Common types include modular, comb-plate, and rubber-plate types. Modular expansion joints consist of a steel frame, rubber sealing strips, and anchoring components, and can accommodate larger displacements (50-1000mm). Comb-plate joints achieve expansion and contraction through the interlocking of staggered toothed steel plates, suitable for small to medium displacement scenarios. Rubber-plate joints utilize the elastic deformation of rubber to absorb displacement, and are less expensive. For example, utility model patent CN206706565U discloses a bridge expansion joint. The bridge expansion joint body is set between two bridges and is composed of expansion joints that are repeatedly bent up and down to form straight folds. The expansion joints are arranged side by side, and the opposite ends of adjacent expansion joints are intersected and spaced apart. The front ends of the two expansion joints are provided with comb teeth that are interlocked with each other. A shock-absorbing pad is installed on the upper end of the expansion joint, a dust cover is installed on the upper end of the shock-absorbing pad, and a shock-absorbing cover is installed on the upper end of the dust cover. A dust collection groove is provided on the upper end of the bridge expansion joint body, and a water collection hole is provided in the middle of the dust collection groove. This utility model extends the service life, reduces wear, and achieves dust prevention, vibration prevention, water collection, and dust collection. However, such expansion joints need to be replaced entirely when damaged, resulting in unnecessary waste. Furthermore, these joints lack a buffer structure, are subjected to greater loads, and have a shorter service life. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a modular, multi-directional, compression-resistant bridge expansion joint. This solves the problems of existing expansion joints requiring complete replacement after damage, resulting in unnecessary waste, and the lack of a buffer structure, leading to high load forces and a short service life. This addresses the issues raised in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a modular multi-directional compressive bridge expansion joint, comprising a base layer, a positioning frame detachably connected to the upper wall of the base layer, guide grooves respectively formed on both sides of the positioning frame, a positioning plate connected to the guide grooves via a connecting rod, a load-bearing frame detachably connected to the positioning plate, and a buffer structure fixedly installed between the positioning frame and the positioning plate to allow the positioning plate to rotate around the guide grooves or slide along the guide grooves and then reset; the buffer structure comprises: two fixed... The positioning frame includes a fixed damping rod, two sets of adjustable damping rods, and two sets of hinge seats. The fixed ends of the two fixed damping rods are fixedly installed on the lower wall inside the positioning frame, and the fixed ends of the two sets of adjustable damping rods are hinged to the lower wall inside the positioning frame. The connecting ends of the fixed damping rods and the adjustable damping rods are fixedly installed on the lower wall of the positioning plate through the two sets of hinge seats. Matching limiting grooves and limiting blocks are provided on both sides of the positioning frame. Compression springs are fitted on the outer walls of the two fixed damping rods and the two sets of adjustable damping rods.

[0005] Preferably, the upper wall of the positioning plate is provided with a positioning groove, and two threaded connection holes are provided in the positioning groove. The lower wall inside the positioning frame is provided with a number of stepped positioning holes, and a number of anchoring steel bars are fixedly installed on the rear wall of the positioning frame.

[0006] Preferably, the positioning groove and the load-bearing frame are slidably connected. The upper wall of the load-bearing frame is provided with a glue-filling hole. The glue-filling hole is provided with stepped threaded holes corresponding to two threaded connection holes. The two stepped threaded holes and the two threaded connection holes are connected by screws. The outer wall of the two screws is respectively fitted with plugs. The two plugs are slidably connected to the large hole end of the stepped threaded holes.

[0007] Preferably, the injection hole is filled with sealant, and a fixing layer is poured between the anchoring steel bars and the base layer.

[0008] Preferably, a plurality of comb teeth are fixedly installed on the load-bearing frame, and a leak-proof layer fixedly connected to the load-bearing frame is provided below the plurality of comb teeth.

[0009] Preferably, a spring plate is fixedly installed between the load-bearing frame and the base layer.

[0010] Beneficial effects This utility model provides a modular multi-directional compressive bridge expansion joint, which has the following beneficial effects: Modular assembly is achieved through a sliding groove connection combined with a glue-filling seal design, which separates vulnerable parts from supporting parts, enabling quick replacement of parts with local damage. The glue-filling seal delays oxidation and erosion at the connection points, increasing the service life of the modular components. This solves the problem of needing to replace the entire bridge expansion joint after it is damaged, which causes unnecessary waste. By adjusting and fixing the damping rods, the system can handle the bidirectional load from passing vehicles. In conjunction with the sliding of the adapter rod in the guide groove and its own rotation, the pressure on the positioning plate is distributed, extending the service life of the load-bearing frame. This solves the problem that existing bridge expansion joints lack a buffer structure, are subjected to large loads, and have a short service life. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the buffer structure of this utility model; Figure 3 This is a schematic diagram of the positioning plate structure of this utility model; Figure 4 This is a schematic diagram of the load-bearing frame structure of this utility model.

[0012] In the diagram: 1. Base layer; 2. Positioning frame; 3. Guide groove; 4. Adapter rod; 5. Positioning plate; 6. Load-bearing frame; 7. Fixed damping rod; 8. Adjustable damping rod; 9. Hinge seat; 10. Limiting groove; 11. Limiting block; 12. Positioning groove; 13. Threaded connection hole; 14. Stepped positioning hole; 15. Anchoring steel bar; 16. Glue hole; 17. Stepped threaded hole; 18. Screw; 19. Plug; 20. Sealant; 21. Fixing layer; 22. Comb teeth; 23. Leak-proof layer; 24. Spring plate; 25. Compression spring. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0014] Please see Figures 1-4A modular multi-directional compressive bridge expansion joint includes a base layer 1. A positioning frame 2 is detachably connected to the upper wall of the base layer 1. Guide grooves 3 are respectively opened on both sides of the positioning frame 2. A positioning plate 5 is connected to the guide groove 3 through a transition rod 4. A load-bearing frame 6 is detachably connected to the positioning plate 5. A buffer structure is fixedly installed between the positioning frame 2 and the positioning plate 5 to enable the positioning plate 5 to rotate around the guide groove 3 or slide along the guide groove 3 and then reset. The buffer structure includes: two fixed damping rods 7, two sets of adjustable damping rods 8, and two sets of hinge seats 9. The two fixed damping rods 7 are fixed The fixed ends are respectively fixedly installed on the lower wall inside the positioning frame 2. The fixed ends of the two sets of adjusting damping rods 8 are respectively hinged to the lower wall inside the positioning frame 2. The connecting ends of the fixed damping rods 7 and the adjusting damping rods 8 are respectively fixedly installed on the lower wall of the positioning plate 5 through two sets of hinge seats 9. The two sides of the positioning frame 2 are respectively provided with matching limiting slide grooves 10 and limiting blocks 11. The outer walls of the two fixed damping rods 7 and the two sets of adjusting damping rods 8 are all fitted with anti-compression springs 25. When in use, the elastic force of the anti-compression springs 25 and the spring plate 24 works together to push the positioning plate 5 to reset.

[0015] Please see 2- Figure 3 The upper wall of the positioning plate 5 is provided with a positioning groove 12, and two threaded connection holes 13 are provided in the positioning groove 12. The lower wall inside the positioning frame 2 is provided with several stepped positioning holes 14, and several anchoring steel bars 15 are fixedly installed on the rear wall of the positioning frame 2.

[0016] Please see Figure 4 The positioning groove 12 is slidably connected to the load-bearing frame 6. The upper wall of the load-bearing frame 6 is provided with a glue-filling hole 16. The glue-filling hole 16 is provided with stepped threaded holes 17 corresponding to two threaded connection holes 13. The two stepped threaded holes 17 are connected to the two threaded connection holes 13 by screws 18. The outer wall of the two screws 18 is respectively fitted with plugs 19. The two plugs 19 are slidably connected to the large hole end of the stepped threaded hole 17.

[0017] Please see Figure 1 and Figure 4 The grouting hole 16 is filled with sealant 20, and a fixing layer 21 is poured between several anchoring steel bars 15 and the base layer 1.

[0018] Please see Figure 4 Several comb teeth 22 are fixedly installed on the load-bearing frame 6. A leak-proof layer 23 fixedly connected to the load-bearing frame 6 is provided below the comb teeth 22. When in use, the leak-proof layer 23 below the comb teeth 22 fits tightly against the load-bearing frame to prevent large pieces of sand and gravel from seeping into the joint.

[0019] Please see Figure 4A spring plate 24 is fixedly installed between the load-bearing frame 6 and the base layer 1. When in use, the elastic force of the compression spring 25 and the spring plate 24 work together to push the positioning plate 5 to reset.

[0020] Example 1: In this example, modular assembly is achieved through a sliding groove connection combined with a potting seal design. This separates vulnerable parts from supporting parts, enabling quick replacement of parts with local damage. The potting seal delays oxidation and corrosion at the connection points, increasing the service life of the modular assembly.

[0021] Specifically, the first step is to pre-treat the base layer 1: clean the base layer 1 at the bridge joint to ensure that the surface is flat and free of scum, and mark the installation reference line along the center line of the joint. Next, the positioning frame 2 is installed: the operator places the positioning frame 2 with the baseline, further adjusts its position through the stepped positioning hole 14 at the bottom, and then uses expansion bolts to penetrate the stepped positioning hole 14 and fix it to the base layer 1; then the limiting block 11 of the adjacent positioning frame 2 is aligned with the limiting slide groove 10 of the fixed positioning frame 2 and inserted, and slids along the slide groove until it fits, ensuring the flatness of the splice. Then the single-set fixing process is repeated until the entire joint length is covered. Then, the anchoring and fixing layer 21 is poured: the fixing layer 21 is poured between several anchoring steel bars 15 and the base layer 1, and cured for at least seventy-two hours until the strength meets the standard, thus completing the fixing of the positioning frame 2. Next, the positioning slide groove is connected: the load-bearing frame 6 is pushed horizontally into the positioning slide groove 12 of the positioning plate 5. When the stepped threaded hole 17 of the load-bearing frame is aligned with the threaded connection hole 13 in the positioning slide groove 12, the screw 18 is inserted and locked. Then, the plug 19 is put on the screw head and pushed into the large end of the stepped threaded hole to prevent the sealant from seeping into the thread. The sealant 20 and the plug 19 form a double seal to prevent moisture from corroding the screw 18 and the threaded hole. Finally, inject the sealant: inject polysulfide sealant 20 through injection hole 16, and let it stand for one day to allow the sealant to cure before installation.

[0022] When the load-bearing frame 6 shows localized wear (such as deformation of the comb teeth 22 or damage to the leak-proof layer 23), insert a flat pry tool along the edge of the glue-filling hole 16 and gently pry to separate the cured sealant 20 from the hole wall (because the plug cap 19 is adhered to the sealant, the plug cap can be removed simultaneously); after the screw 18 is exposed, loosen it with a torque wrench and remove it. Take out the old load-bearing frame along the positioning groove 12. After replacing the new load-bearing frame 6, repeat the "thread tightening - sealant injection" process to complete the replacement.

[0023] Example 2: In this example, the damping rod 8 and the fixed damping rod 7 are adjusted to cope with the bidirectional load from the passing vehicle. In conjunction with the sliding of the adapter rod 4 in the guide groove 3 and its own rotation, the pressure of the positioning plate 5 is dispersed, and the service life of the load-bearing frame 6 is extended.

[0024] Specifically, when the ambient temperature changes, the bridge base layer 1 undergoes lateral displacement due to thermal expansion and contraction, which is transmitted to the positioning plate 5 through the positioning frame 2. The positioning plate 5 drives the load-bearing frame 6 to move synchronously. During this period, the comb teeth 22 work together to limit the movement. The comb teeth 22 mesh with each other to limit excessive lateral displacement. The adjusting damping rod 8 tilts adaptively with the sliding angle of the positioning plate 5 through the hinge seat 9, and works with the fixed damping rod 7 to keep the positioning plate 5 stable. The compression spring 25 on the outer wall stores elastic potential energy.

[0025] When a heavy truck passes by, the load is transferred to the positioning plate 5 through the load-bearing frame 6. The positioning plate 5 slides downward along the guide groove 3 through the adapter rod 4, compressing the fixed damping rod 7, the adjustable damping rod 8, and the anti-compression spring 25 to absorb the impact energy. The lateral component of the vehicle load causes the positioning plate 5 to rotate slightly around the adapter rod 4. The adjustable damping rod 8 extends and retracts laterally through the hinge seat 9. After the vehicle leaves, the elastic force of the anti-compression spring 25 and the spring plate 24 work together to push the positioning plate 5 to reset. During this process, the damping force of the fixed damping rod 7 slowly releases energy to avoid violent vibration during reset and ensure that the upper surface of the load-bearing frame 6 returns to a horizontal position. The leak-proof layer 23 below the comb teeth 22 fits tightly against the load-bearing frame to prevent large pieces of sand and gravel from seeping into the joints.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular multi-directional compressive bridge expansion joint, comprising a base layer (1), characterized in that, A positioning frame (2) is detachably connected to the upper wall of the base layer (1). Guide grooves (3) are respectively opened on both sides of the positioning frame (2). A positioning plate (5) is connected in the guide groove (3) through a converter rod (4). A load-bearing frame (6) is detachably connected to the positioning plate (5). A buffer structure is fixedly installed between the positioning frame (2) and the positioning plate (5) to enable the positioning plate (5) to rotate around the guide groove (3) or slide along the guide groove (3) and then reset. The buffer structure includes: two fixed damping rods (7), two sets of adjustable damping rods (8), and two sets of hinge seats (9). The fixed ends of the two fixed damping rods (7) are respectively fixedly installed on the lower wall inside the positioning frame (2). The fixed ends of the two sets of adjustable damping rods (8) are respectively hinged to the lower wall inside the positioning frame (2). The connecting ends of the fixed damping rods (7) and the adjustable damping rods (8) are respectively fixedly installed on the lower wall of the positioning plate (5) through the two sets of hinge seats (9). The two sides of the positioning frame (2) are respectively provided with matching limiting grooves (10) and limiting blocks (11). The outer walls of the two fixed damping rods (7) and the two sets of adjustable damping rods (8) are all fitted with anti-compression springs (25).

2. The modular multi-directional compressive bridge expansion joint according to claim 1, characterized in that, The upper wall of the positioning plate (5) is provided with a positioning groove (12), and two threaded connection holes (13) are provided in the positioning groove (12). The lower wall of the positioning frame (2) is provided with several stepped positioning holes (14), and several anchoring steel bars (15) are fixedly installed on the rear wall of the positioning frame (2).

3. A modular multi-directional compressive bridge expansion joint according to claim 2, characterized in that, The positioning groove (12) is slidably connected to the load-bearing frame (6). The upper wall of the load-bearing frame (6) is provided with a glue-filling hole (16). The glue-filling hole (16) is provided with stepped threaded holes (17) corresponding to the two threaded connection holes (13). The two stepped threaded holes (17) are connected to the two threaded connection holes (13) by screws (18). The outer wall of the two screws (18) is fitted with plugs (19). The two plugs (19) are slidably connected to the large hole end of the stepped threaded hole (17).

4. A modular multi-directional compressive bridge expansion joint according to claim 3, characterized in that, The grouting hole (16) is filled with sealant (20), and a fixing layer (21) is poured between the anchoring steel bars (15) and the base layer (1).

5. A modular multi-directional compressive bridge expansion joint according to claim 1, characterized in that, A number of comb teeth (22) are fixedly installed on the load-bearing frame (6), and a leak-proof layer (23) fixedly connected to the load-bearing frame (6) is provided below the number of comb teeth (22).

6. A modular multi-directional compressive bridge expansion joint according to claim 1, characterized in that, A spring plate (24) is fixedly installed between the load-bearing frame (6) and the base layer (1).

Images