Grid type comb plate expansion joint
By setting cross bars and springs on the comb rods of the expansion joint of the bridge comb plate to form a grating structure, the problem of excessive tooth joints caused by the expansion deformation of the beam section of the expansion joint of the large bridge comb plate is solved, and the passage safety and comfort are improved.
Patent Information
- Application Number
- CN202510385804.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-29
- Publication Date
- 2025-05-16
AI Technical Summary
The expansion joints of the comb plates of large bridges are large due to the large expansion deformation of the beam section, which leads to large length and width of the teeth joints, which easily leads to pedestrians and non-motor vehicles getting stuck in and jumping when motor vehicles pass.
A grille-type comb-tooth plate expansion joint is designed, and strip-shaped sliding holes penetrate the two sides of the comb-tooth rod are provided on the comb-tooth rod, and cross-bars are inserted in the sliding holes in the direction perpendicular to the comb-tooth rod, and springs are welded between the cross-bars to form a grille structure to adapt to the expansion and contraction of the bridge.
It effectively avoids pedestrians and non-motor vehicles getting stuck in the teeth, reduces the phenomenon of jumping when motor vehicles pass, and improves traffic comfort.
Smart Images
Figure CN120006601A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of bridge construction, and relates to a bridge expansion joint structure, in particular to a grid-type comb plate expansion joint. Background Art
[0002] The expansion joint of a bridge is a span device set between the opposite ends of two beam sections. Its function is to adapt to the expansion and deformation of the beam section caused by factors such as temperature changes and load effects. Figure 1 It is a conventional comb-tooth plate expansion joint structure, including two comb-tooth plates, each of which includes a long strip anchor plate 1, and a plurality of comb-tooth rods 2 are equidistantly fixed on one side of the anchor plate. A certain distance is reserved between the opposite ends of the two beam sections of the bridge, and the anchor plates of the two comb-tooth plates are respectively anchored on the top surfaces of the opposite ends of the two beam sections. The comb-tooth rods of the two comb-tooth plates are staggered, and there is a certain gap between every two adjacent comb-tooth rods. At the same time, a certain distance is also reserved between the front end of the comb-tooth rod of each comb-tooth plate and the anchor plate of the other comb-tooth plate to form a tooth gap 3. When the two beam sections are deformed laterally or longitudinally due to external factors, the two comb-tooth plates move relative to each other as the beam sections are deformed.
[0003] For large bridges, due to the large expansion and contraction deformation of their beam sections, the reserved longitudinal spacing between the front end of the comb rod of each comb plate and the anchor plate of another comb plate is also large. At the same time, in order to ensure that the comb plate has sufficient bearing capacity, the cross-section of the comb rod is usually large, so the lateral spacing between two adjacent comb rods is also large, resulting in a large length and width of the tooth gap 3. Pedestrians' feet and non-motor vehicle wheels are easily stuck in the tooth gap, affecting the safety of pedestrians and non-motor vehicles. At the same time, motor vehicles are prone to jumping out when passing through the tooth gap, affecting the comfort of vehicle traffic. Summary of the invention
[0004] The purpose of the present invention is to provide a grille-type comb plate expansion joint to solve the above-mentioned problem, which can prevent pedestrians and non-motor vehicles from getting stuck in the expansion joint teeth while ensuring the normal expansion and contraction of the expansion joint, and at the same time improve the comfort of motor vehicle traffic.
[0005] The technical solution of the present invention is as follows:
[0006] A grid-type comb-tooth plate expansion joint comprises two comb-tooth plates, each of which comprises an anchor plate, a plurality of comb-tooth rods are fixedly arranged on one side of the anchor plate, the comb-tooth rods of the two comb-tooth plates are arranged alternately, and a certain distance is provided between the front end of each comb-tooth rod of each comb-tooth plate and the anchor plate of the other comb-tooth plate, characterized in that: each comb-tooth rod is provided with a strip-shaped sliding hole passing through both sides thereof near the rear end, at least three cross bars are passed through the sliding holes on each comb-tooth rod of each comb-tooth plate in a direction perpendicular to the comb-tooth rod, and a spring is respectively welded between adjacent cross bars and between every two adjacent comb-tooth rods in a direction parallel to the comb-tooth rod; a spring is respectively welded between the front end of each comb-tooth rod of a comb-tooth plate and the cross bar on the other adjacent comb-tooth plate.
[0007] The present invention respectively arranges a plurality of steel cross bars on the comb tooth rods of the two comb tooth plates, and the adjacent cross bars and the front end of each comb tooth rod are connected with the adjacent cross bar through springs. When the bridge is telescopically deformed, the cross bars can move with the comb tooth plates under the action of the springs to adapt to the telescopic deformation of the bridge, and the cross bars and the comb tooth rods are vertically and horizontally crossed to form a grid structure at the tooth gaps, which can effectively prevent the feet of pedestrians and the wheels of non-motor vehicles from getting stuck in the tooth gaps, and prevent the motor vehicle from jumping when passing through the expansion joints. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of the plane structure of a conventional comb plate expansion joint;
[0009] Figure 2 It is a schematic diagram of the planar structure of the present invention;
[0010] Figure 3 It is a side structural schematic diagram of a comb plate of the present invention. DETAILED DESCRIPTION
[0011] like Figure 2 , Figure 3 As shown, the present invention includes two comb tooth plates, each of which includes an anchor plate 1, and a plurality of comb tooth rods 2 are fixedly arranged on one side of the anchor plate, the comb tooth rods of the two comb tooth plates are arranged alternately, and there is a certain distance between the front end of each comb tooth rod of each comb tooth plate and the anchor plate of the other comb tooth plate; each comb tooth rod is provided with a strip-shaped sliding hole 21 passing through both sides thereof near the rear end, and at least three cross bars 4 are passed through the sliding holes on each comb tooth rod of each comb tooth plate in a direction perpendicular to the comb tooth rod, and a spring 5 is respectively welded between each two adjacent comb tooth rods in a direction parallel to the comb tooth rod; a spring 5 is respectively welded between the front end of each comb tooth rod 2 of a comb tooth plate and the cross bar 4 on the other adjacent comb tooth plate.
[0012] In the above structure, each cross bar 4 and the comb tooth bar 2 cross vertically and horizontally to form a grid structure, which divides the longer tooth gap of the conventional expansion joint into a plurality of smaller grids, which can effectively prevent the feet of pedestrians and the wheels of non-motor vehicles from getting stuck in the tooth gap, and at the same time can reduce the phenomenon of motor vehicles jumping when passing.
[0013] When the above expansion joint structure is in use, the anchor plates of the two comb plates are respectively anchored on the top surfaces of the opposite ends of the two beam sections, and a certain deformation space is reserved between the two beam sections. When the beam section is deformed by expansion and contraction, the two comb plates move relative to each other, and the comb rod drives the cross rod to move forward and backward together, which can adapt to the longitudinal expansion and contraction deformation of the bridge; when the longitudinal deformation of the bridge is large, the springs between the cross rods and the springs between the comb rod and the cross rod are compressed or stretched, and the spacing between the cross rods can be reduced or increased accordingly, thereby adapting to the large expansion and contraction deformation of the bridge. When the two beam sections produce vertical relative displacement due to vibration, the springs can bend up and down to adapt to the vertical deformation of the bridge; when the two beam sections produce lateral relative displacement due to vibration, the cross rod and the comb rod can slide relative to each other, thereby adapting to the lateral deformation of the bridge.
[0014] In the specific implementation of the present invention, the cross section of the cross bar adopts a rectangular or circular cross section. When the cross bar adopts a rectangular cross section, the top surface of the cross bar is a plane, and the vehicle passes smoothly, but the friction resistance of the cross bar when sliding in the sliding hole is large; when the cross bar adopts a circular cross section, the top surface of the cross bar is an arc, and the vehicle passes smoothly as compared with the rectangular cross section, but the contact surface between the cross bar and the sliding hole is small, and the friction resistance is also small.
Claims
1. A grid-type comb plate expansion joint, comprising two comb plates, each of which comprises an anchor plate, a plurality of comb rods are fixedly arranged on one side of the anchor plate, the comb rods of the two comb plates are staggered, and there is a certain distance between the front end of each comb rod of each comb plate and the anchor plate of the other comb plate, characterized in that: Each comb tooth rod is provided with a strip-shaped sliding hole passing through both sides thereof near the rear end, at least three cross bars are passed through the sliding holes on each comb tooth rod of each comb tooth plate in a direction perpendicular to the comb tooth rod, and a spring is respectively welded between every two adjacent comb tooth rods in a direction parallel to the comb tooth rod; a spring is respectively welded between the front end of each comb tooth rod of a comb tooth plate and the cross bar on another adjacent comb tooth plate.
2. The grid-type comb plate expansion joint according to claim 1, characterized in that: The cross section of the cross bar is a rectangular or circular cross section.