Multi-directional displacement comb plate type telescopic device
By incorporating angle steel, sealing compound, and waterproof sealing tape into the comb-plate type bridge expansion joint, the problems of low anchorage strength and high noise were solved, achieving high-strength connection, low noise, and multi-directional displacement, thus improving the safety and installation efficiency of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-04-03
AI Technical Summary
Existing comb-plate type bridge expansion joints have low anchorage strength and generate significant noise when vehicles pass over them.
Angle steel is installed under the first and second comb plates and connected by high-strength threaded sleeves and bolts to increase the anchoring strength; sealing colloid and waterproof sealing tape are installed between the comb plates to reduce vibration and noise; the comb tooth gap is designed to accommodate multi-directional displacement.
It improves anchoring strength, reduces noise when vehicles pass, enhances stability, and provides dustproof, waterproof, and drainage functions, adapting to the multi-directional displacement of the bridge.
Smart Images
Figure CN224077960U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of bridge expansion joints, and particularly relates to a multi-directional displacement comb-tooth plate type expansion joint. Background Technology
[0002] Bridge expansion joints are installed between the abutment and the bridge beam or between the ends of two beams to accommodate deformations caused by temperature expansion and contraction, concrete creep, and live loads, while also allowing vehicles to pass smoothly. Currently used comb-plate type expansion joints include a pair of first and second comb plates. The first comb plate has a first comb tooth near the end of the second comb plate, and the second comb plate has a second comb tooth near the end of the first comb plate. The first and second comb teeth are staggered, and a dustproof stainless steel plate is installed under either the first or second comb plate. In this type of expansion joint, the first and second comb plates are fixed with nuts and pre-embedded bolts, resulting in low anchorage strength. Furthermore, although the comb-plate type expansion joint itself offers the advantage of smooth vehicle passage, the comb-tooth design creates an uneven surface, increasing noise when vehicles pass. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a multi-directional displacement comb-type telescopic device with high anchoring strength and low noise.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: It includes a pair of first and second comb plates. A first comb tooth is provided at the end of the first comb plate near the second comb plate, and a second comb tooth is provided at the end of the second comb plate near the first comb plate. The first and second comb teeth are staggered. A dustproof stainless steel plate is provided below either the first or second comb plate. A first angle steel is provided below the first comb plate, and the length of the first angle steel matches the length of the first comb plate. A first high-strength threaded sleeve is provided at the bottom of the first angle steel. The first high-strength anchor bolt passes through the first comb plate, the first angle steel, and is connected to the first high-strength threaded sleeve; a second angle steel is provided below the second comb plate, the length of the second angle steel matches the length of the second comb plate, and a second high-strength threaded sleeve is provided at the bottom of the second angle steel; the second high-strength anchor bolt passes through the second comb plate, the second angle steel, and is connected to the second high-strength threaded sleeve; a waterproof sealing tape is provided between the first angle steel and the second angle steel, a drain pipe is provided at the bottom of the waterproof sealing tape, and a sealing adhesive is provided between the first comb plate and the second comb plate.
[0005] Its additional technical features are: the bottom surface of the first comb tooth is provided with a first comb tooth reinforcing rib, and the bottom surface of the second comb tooth is provided with a second comb tooth reinforcing rib;
[0006] There is a gap between the first comb tooth and the second comb tooth.
[0007] The multi-directional displacement comb-plate telescopic device provided by this utility model has the following advantages compared with the prior art: Firstly, a first angle steel is provided below the first comb plate, and a second angle steel is provided below the second comb plate. The first and second angle steels are continuous angle steels along the length of the beam joint. A first high-strength threaded sleeve is provided at the bottom of the first angle steel, and a second high-strength threaded sleeve is provided at the bottom of the second angle steel. Compared with the traditional spot fixing method, the anchoring strength of the first and second high-strength threaded sleeves is greatly improved. The first high-strength anchor bolt passes through the first comb plate, the first angle steel, and connects to the first high-strength threaded sleeve, and the second high-strength anchor bolt passes through the second comb plate, the second angle steel, and connects to the second high-strength threaded sleeve. The connection length of the threads of the first and second high-strength anchor bolts is more than twice the connection length of the traditional nut connection, further improving the anchoring strength. This improves the safety of the comb plate telescopic device; secondly, a sealing colloid is installed between the first and second comb plates, reducing the vibrations caused by the vehicle, improving the stability of the vehicle when passing, and reducing the impact noise of the vehicle tires; thirdly, the sealing colloid between the first and second comb plates, and the waterproof sealing tape between the first and second angle steels, form two lines of dust and water protection. The first line of protection is the sealing colloid filling the gap between the first and second comb plates, which prevents road dust and solid waste from clogging the gap between the first and second comb plates, and also prevents water from flowing in; the second line of protection is the sealing colloid filling the gap between the first and second angle steels. The waterproof sealing tape between the steel and the second angle steel allows water to flow into the expansion joint and be discharged into the bridge's drainage system along the waterproof sealing tape and the drain pipe at its bottom, achieving drainage and combining dust prevention and drainage for a waterproof seal. Fourth, the bottom surface of the first comb tooth is equipped with a first comb tooth reinforcing rib, and the bottom surface of the second comb tooth is equipped with a second comb tooth reinforcing rib, which strengthens the first and second comb teeth. Fifth, there is a gap between the first and second comb teeth. Through the design of the tooth shape, the gap between the teeth can be used to adapt to lateral and longitudinal displacement. In this way, the comb tooth plate expansion device with the joint-spanning method solves the problem of multi-directional displacement of the bridge in the longitudinal, vertical, transverse and torsional directions, releasing the displacement of the beam joint.
[0008] The multi-directional displacement comb-plate type telescopic device provided by this utility model is made of low-alloy high-strength structural steel, exhibiting excellent mechanical properties. The telescopic device eliminates the traditional nut anchoring method, using bolts instead, resulting in better durability. During maintenance or replacement, the bolts are simply unscrewed, the comb plate removed, and the lower structural components of the telescopic device can be replaced, minimizing maintenance costs. All components of the multi-directional displacement comb-plate type telescopic device provided by this utility model are pre-assembled in the factory. The pre-assembled telescopic device is placed into the pre-reserved groove in the beam joint, and concrete is poured, avoiding on-site assembly of the comb plate and installation of the rubber strip, thus improving installation quality and efficiency. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of the multi-directional displacement comb-plate telescopic device of this utility model;
[0010] Figure 2 A top view schematic diagram of a multi-directional displacement comb-plate telescopic device;
[0011] Figure 3 A schematic diagram of the structure of a multi-directional displacement comb-plate telescopic device.
[0012] Figure 4 A schematic diagram of a multi-directional displacement comb-type telescopic device exhibiting vertical dislocation;
[0013] Figure 5 A schematic diagram of the structure of a multi-directional displacement comb-type telescopic device exhibiting lateral and longitudinal misalignment. Detailed Implementation
[0014] The specific structure of the multi-directional displacement comb-plate telescopic device provided by this utility model will be further described in detail below with reference to the accompanying drawings.
[0015] like Figure 1 , Figure 2As shown, the multi-directional displacement comb-plate telescopic device of this utility model includes a first comb plate 1 and a second comb plate 2 arranged in pairs. The first comb plate 1 has a first comb tooth 3 near the end of the second comb plate 2, and the second comb plate 2 has a second comb tooth 4 near the end of the first comb plate 1. The first comb tooth 3 and the second comb tooth 4 are staggered. A dustproof stainless steel plate 5 is provided below the first comb plate 1, and a first angle steel 6 is provided below the first comb plate 1. The length of the first angle steel 6 matches the length of the first comb plate 1. A first high-strength threaded sleeve 7 is provided at the bottom of the first angle steel 6. A first high-strength anchor bolt 8 passes through the first comb plate 1, the first angle steel 6, and connects to the first high-strength threaded sleeve 7. The second comb... A second angle steel 9 is provided below the toothed plate 2. The length of the second angle steel 9 matches the length of the second comb toothed plate 2. A second high-strength threaded sleeve 10 is provided at the bottom of the second angle steel 9. A second high-strength anchor bolt 11 passes through the second comb toothed plate 2, the second angle steel 9 and connects to the second high-strength threaded sleeve 10. A waterproof sealing tape 12 is provided between the first angle steel 6 and the second angle steel 9. A drain pipe 13 is provided at the bottom of the waterproof sealing tape 12. A sealing colloid 14 is provided between the first comb toothed plate 1 and the second comb toothed plate 2. A first comb tooth reinforcing rib 15 is provided on the bottom surface of the first comb tooth 3. A second comb tooth reinforcing rib 16 is provided on the bottom surface of the second comb tooth 4. There is a gap between the first comb tooth 3 and the second comb tooth 4.
[0016] like Figure 3 As shown, the anchor plates 17 and anchor bars 18 of the first comb plate 1 and the second comb plate 2 are fixed to the beam 21 through the pre-embedded beam steel bars 19 and the transverse steel bars 20.
[0017] like Figure 4 As shown, there is a gap between the first comb tooth 3 and the second comb tooth 4 to accommodate lateral dislocation.
[0018] like Figure 5 As shown, the first comb tooth 3 and the second comb tooth 4 are adapted to longitudinal dislocation.
[0019] The multi-directional displacement comb-plate telescopic device provided by this utility model has a first angle steel 6 installed below the first comb plate 1 and a second angle steel 9 installed below the second comb plate 2. The first angle steel 6 and the second angle steel 9 are continuous angle steels along the length of the beam joint 21. A first high-strength threaded sleeve 7 is installed at the bottom of the first angle steel 6, and a second high-strength threaded sleeve 10 is installed at the bottom of the second angle steel 9. Compared with traditional spot fixing methods, the anchoring strength of the first high-strength threaded sleeve 7 and the second high-strength threaded sleeve 10 is greatly improved. A first high-strength anchor bolt 8 passes through the first comb plate 1 and the first angle steel 6 and connects to the first high-strength threaded sleeve 7. A second high-strength anchor bolt 11 passes through the second comb plate 2 and the second angle steel 9 and connects to the second high-strength threaded sleeve 10. The connection length of the threads of the first high-strength anchor bolt 8 and the second high-strength anchor bolt 11 is more than twice the connection length of a traditional nut, further improving the anchoring strength. This improves the safety of the comb plate telescopic device; a sealing colloid 14 is provided between the first comb plate 1 and the second comb plate 2, reducing the vibration brought by the vehicle to the first comb plate 1 and the second comb plate 2, improving the stability when the vehicle passes, and reducing the impact noise of the vehicle tires; the sealing colloid 14 provided between the first comb plate 1 and the second comb plate 2, and the waterproof sealing tape 14 provided between the first angle steel 6 and the second angle steel 9 form two lines of dustproof and waterproof protection. The first line of protection is the sealing colloid 14 filling the gap between the first comb plate 1 and the second comb plate 2. The sealing colloid 14 prevents road dust and solid waste from filling the gap between the first comb plate 1 and the second comb plate 2, and also prevents water from flowing into the gap; the second line of protection is the... The waterproof sealing tape 12 between the first angle steel 6 and the second angle steel 9 allows water to flow into the expansion joint and drain into the bridge's drainage system via the waterproof sealing tape 12 and the drain pipe 13 at its bottom, achieving drainage and combining dustproofing and drainage for a combined dustproof and waterproof seal. The bottom surface of the first comb tooth 3 is provided with a first comb tooth reinforcing rib 15, and the bottom surface of the second comb tooth 4 is provided with a second comb tooth reinforcing rib 16, which strengthens the first comb tooth 3 and the second comb tooth 4. There is a gap between the first comb tooth 3 and the second comb tooth 4. Through the design of the tooth shape, the gap between the teeth can be used to adapt to lateral and longitudinal displacement. In this way, the comb tooth plate expansion joint with the joint-riding method solves the problem of multi-directional displacement of the bridge in the longitudinal, vertical, transverse and torsional directions, releasing the displacement of the beam joint.
[0020] The multi-directional displacement comb-plate telescopic device provided by this utility model is not limited to the above-described structure. Any modifications, equivalent substitutions, and improvements made based on this utility model should be included within the protection scope of this utility model. Any similar or identical modifications or improvements fall within the protection scope of this utility model.
Claims
1. A multi-directional displacement comb-plate type telescopic device, comprising a pair of first comb plates and second comb plates, wherein a first comb tooth is provided at one end of the first comb plate near the second comb plate, and a second comb tooth is provided at one end of the second comb plate near the first comb plate, the first and second comb teeth being staggered, and a dustproof stainless steel plate is provided below the first or second comb plate, characterized in that: A first angle steel is provided below the first comb plate, the length of which matches the length of the first comb plate. A first high-strength threaded sleeve is provided at the bottom of the first angle steel. A first high-strength anchor bolt passes through the first comb plate, the first angle steel, and the first high-strength threaded sleeve. A second angle steel is provided below the second comb plate, the length of which matches the length of the second comb plate. A second high-strength threaded sleeve is provided at the bottom of the second angle steel. A second high-strength anchor bolt passes through the second comb plate, the second angle steel, and the second high-strength threaded sleeve. A waterproof sealing tape is provided between the first and second angle steels, and a drain pipe is provided at the bottom of the waterproof sealing tape. A sealing adhesive is provided between the first and second comb plates.
2. The multi-directional displacement comb-plate telescopic device according to claim 1, characterized in that: The bottom surface of the first comb tooth is provided with a first comb tooth reinforcing rib, and the bottom surface of the second comb tooth is provided with a second comb tooth reinforcing rib.
3. The multi-directional displacement comb-plate telescopic device according to claim 1, characterized in that: There is a gap between the first comb tooth and the second comb tooth.