Anti-drawing support device for bridge
By designing an anti-pull bearing device for bridges, the problem of bridge supports bearing tension and pressure under different stress conditions is solved, and the function of anti-seismic anti-falling beams is realized, reducing project construction costs.
Patent Information
- Application Number
- CN202421185532.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-28
AI Technical Summary
Bridge support may withstand vertical downward pressure or vertical upward tension under different stress conditions, and lack the function of earthquake resistance and fall-off beams, resulting in increased project construction costs.
A tensile-resistant bearing device for a bridge is designed, which includes a cross-overlapping first I-shaped beam and a second I-shaped beam, equipped with a flexible backing plate and a pre-embedded bolt system, which can be used when the bearing is under tension. They transmit force through mutual extrusion, resist the upward displacement of the bridge beam, and prevent the beam from falling during an earthquake.
This device can not only withstand the tension and pressure generated at the fulcrum of the bridge, but also has the function of anti-seismic anti-falling beams, which avoids the need to set up a separate anti-seismic anti-falling beam device, reduces the project cost, and has a simple structure and easy installation.
Smart Images
Figure CN222375178U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of bridges, and in particular relates to an anti-pullout bearing device for bridges. Background Art
[0002] The bridge bearing is an important structural component connecting the superstructure and the substructure of the bridge. It is installed on the bridge piers and supports various loads of the superstructure of the bridge. Its function is to fix the upper beam structure on the piers, bear the forces transmitted by various loads such as the self-weight of the bridge, live load, temperature, concrete shrinkage and creep, and reliably transmit various forces to the piers. At the same time, it can adapt to the rotation and displacement of the superstructure, so that the superstructure can be deformed freely without generating additional internal forces. Usually, the bearing bears the vertical downward pressure from the superstructure of the bridge, and transmits the pressure to the piers and foundation through the bearing. However, in some cases, the bridge design is limited by special terrain conditions, geological conditions, etc., and the bridge bearing is more complicated. For the same bridge, under different load conditions, the bridge bearing may bear vertical downward pressure or vertical upward tension. At the same time, according to the current seismic design specifications for urban bridges, earthquakes with a basic intensity of 7 degrees or above require the installation of seismic anti-falling beam devices. General supports do not have seismic anti-falling beam functions, and can only be equipped with separate anti-falling beam measures, which increases construction costs.
[0003] Therefore, for a bridge support that needs to withstand both vertical downward pressure and vertical upward tension, has earthquake-resistant and anti-falling beam functions, and reduces engineering costs, it is necessary to comprehensively consider the design. The utility model is designed based on the above requirements and various factors. Utility Model Content
[0004] The utility model aims to provide an anti-pullout support device for a bridge, so as to solve the problem of how the support can withstand the vertical upward pulling force.
[0005] The technical solution of the utility model is: a pull-out resistant bearing device for a bridge, comprising a first I-shaped crossbeam and a second I-shaped crossbeam; the first I-shaped crossbeam is respectively connected to first connecting steel plates at both ends, the first connecting steel plate is connected to a first bearing pad at the lower end, and the first bearing pad is connected to the top of the pier cap; the second I-shaped crossbeam is respectively connected to second connecting steel plates at both ends, the second connecting steel plate is connected to a second bearing pad at the upper end, and the second bearing pad is connected to the bottom of the bridge main beam; the first I-shaped crossbeam and the second I-shaped crossbeam are cross-lapped vertically and horizontally, and the first I-shaped crossbeam is located above the second I-shaped crossbeam.
[0006] As a further improvement of the utility model, a flexible pad is provided between the first I-shaped cross beam and the second I-shaped cross beam.
[0007] As a further improvement of the present invention, the flexible pad is made of rubber.
[0008] As a further improvement of the utility model, a first embedded bolt is provided on the top of the pier abutment cap, and the first bearing pad is connected to the pier abutment cap through the first embedded bolt and the first nut.
[0009] As a further improvement of the utility model, a first bolt pad is provided between the first nut and the first support pad.
[0010] As a further improvement of the utility model, a second embedded bolt is provided at the bottom of the bridge main beam, and the second support pad is connected to the bridge main beam through the second embedded bolt and the second nut.
[0011] As a further improvement of the utility model, a second bolt pad is provided between the second nut and the second support pad.
[0012] The beneficial effect of the utility model is that when a negative reaction force appears at the bridge fulcrum, that is, when the support is subjected to tension, the cross-lapped first I-shaped crossbeam and the second I-shaped crossbeam squeeze each other, and transmit the tension to the first connecting steel plate or the second connecting steel plate, and then to the pier or the bridge main beam, thereby resisting the tension generated by the upward displacement of the bridge beam body. The utility model can withstand both the tension generated at the bridge fulcrum and the pressure generated at the fulcrum; at the same time, it also has the function of earthquake-resistant and anti-falling beam, avoiding the need to set up an earthquake-resistant and anti-falling beam device separately, and reducing the engineering cost. The utility model has a simple structure and is easy to process and install. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model;
[0014] Figure 2 It is a top view schematic diagram of the first I-shaped crossbeam and the second I-shaped crossbeam in the utility model.
[0015] In the figure: 1-bridge main beam; 2-pier abutment cap; 3-second embedded bolt; 4-first bearing pad; 5-first bolt pad; 6-first I-shaped crossbeam; 7-first connecting steel plate; 8-flexible pad; 9-second I-shaped crossbeam; 10-second connecting steel plate; 11-second bearing pad; 12-first embedded bolt; 13-first nut; 14-second nut; 15-second bolt pad. DETAILED DESCRIPTION
[0016] The utility model is described in detail below in conjunction with the accompanying drawings.
[0017] like Figure 1 , Figure 2As shown, a tensile-resistant bearing device for a bridge includes a first I-shaped crossbeam 6 and a second I-shaped crossbeam 9; first connecting steel plates 7 are welded at both ends of the first I-shaped crossbeam 6, a first bearing pad 4 is welded at the lower end of the first connecting steel plate 7, and the first bearing pad 4 is connected to the top of the pier cap 2; second connecting steel plates 10 are welded at both ends of the second I-shaped crossbeam 9, a second bearing pad 11 is welded at the upper end of the second connecting steel plate 10, and the second bearing pad 11 is connected to the bottom of the bridge main beam 1; the first I-shaped crossbeam 6 and the second I-shaped crossbeam 9 are cross-lapped vertically and horizontally, and the first I-shaped crossbeam 6 is located above the second I-shaped crossbeam 9.
[0018] A flexible pad 8 is provided between the first I-shaped cross beam 6 and the second I-shaped cross beam 9. The flexible pad 8 is made of rubber.
[0019] A first embedded bolt 12 is provided on the top of the bridge pier cap 2, and the first bearing pad 4 is connected to the bridge pier cap 2 through the first embedded bolt 12 and the first nut 13. A first bolt pad 5 is provided between the first nut 13 and the first bearing pad 4.
[0020] A second embedded bolt 3 is provided at the bottom of the bridge main beam 1, and the second support plate 11 is connected to the bridge main beam 1 through the second embedded bolt 3 and the second nut 14. A second bolt plate 15 is provided between the second nut 14 and the second support plate 11.
[0021] When negative reaction force appears at the bridge support point, that is, when the support is subjected to tension, the cross-lapped first I-shaped beam 6 and the second I-shaped beam 9 squeeze each other through the flexible pad 8, and transmit the tension to the first connecting steel plate 7 or the second connecting steel plate 10, and then to the pier 2 or the bridge main beam 1, thereby resisting the tension generated by the upward displacement of the bridge beam. At the same time, when an earthquake occurs, the utility model device connects the upper beam of the bridge with the lower pier of the bridge to prevent the beam from falling.
[0022] The utility model effectively solves the tension generated by the upward displacement of the bridge beam, and can withstand the vertical pressure from the upper structure, while meeting the requirements of bridge earthquake resistance and beam drop prevention. The utility model has a simple structure, low cost, easy production and installation, and a neat appearance, meeting the requirements of economy, beauty and practicality.
Claims
1. A tensile support device for a bridge, characterized in that: The invention comprises a first I-shaped cross beam (6) and a second I-shaped cross beam (9); the first I-shaped cross beam (6) is respectively connected to first connecting steel plates (7) at both ends, the first connecting steel plates (7) are connected to a first support pad (4) at the lower end, and the first support pad (4) is connected to the top of the pier cap (2); the second I-shaped cross beam (9) is respectively connected to second connecting steel plates (10) at both ends, the second connecting steel plates (10) are connected to a second support pad (11) at the upper end, and the second support pad (11) is connected to the bottom of the bridge main beam (1); the first I-shaped cross beam (6) and the second I-shaped cross beam (9) are cross-jointed vertically and horizontally, and the first I-shaped cross beam (6) is located above the second I-shaped cross beam (9).
2. The anti-pullout bearing device for a bridge according to claim 1, characterized in that: A flexible pad (8) is provided between the first I-shaped crossbeam (6) and the second I-shaped crossbeam (9).
3. The anti-pullout bearing device for a bridge according to claim 2, characterized in that: The flexible pad (8) is made of rubber.
4. A tensile bearing device for a bridge according to any one of claims 1 to 3, characterized in that: A first embedded bolt (12) is provided on the top of the pier abutment cap (2), and the first bearing pad (4) is connected to the pier abutment cap (2) via the first embedded bolt (12) and a first nut (13).
5. The anti-pullout bearing device for a bridge according to claim 4, characterized in that: A first bolt pad (5) is provided between the first nut (13) and the first support pad (4).
6. A tensile bearing device for a bridge according to any one of claims 1 to 3, characterized in that: A second embedded bolt (3) is provided at the bottom of the bridge main beam (1), and the second support pad (11) is connected to the bridge main beam (1) via the second embedded bolt (3) and a second nut (14).
7. The anti-pullout bearing device for a bridge according to claim 6, characterized in that: A second bolt pad (15) is provided between the second nut (14) and the second support pad (11).