Municipal road anti-seismic bridge support

Abstract

The utility model discloses a municipal road anti-seismic bridge support and belongs to the technical field of bridges. A stand column is arranged in the middle of the installation block, one end of the stand column is connected into the installation block in a spherical hinge mode, a baffle ring is arranged on the edge of the installation block, one end of the baffle ring is fixed to the installation block, external threads are arranged on the outer surface of the stand column, and the stand column is sleeved with a connecting column in a sliding mode. A plurality of transverse buffer springs which are evenly distributed in the circumferential direction are arranged on the outer surface of the connecting column, one ends of the transverse buffer springs are fixedly connected to the connecting column, the other ends of the transverse buffer springs abut against the inner side face of the baffle ring, and limiting nuts are arranged on the upper side face and the lower side face of the connecting column correspondingly. The limiting nut is in threaded connection with the outer threads, a supporting plate is arranged at the other end of the stand column, the middle of the supporting plate is fixed to the stand column, and the supporting plate is located above the baffle ring. According to the scheme, the problem that in the prior art, an anti-seismic support is poor in buffering effect on seismic transverse waves is solved.

Description

Technical Field

[0001] This utility model belongs to the field of bridge technology, specifically relating to earthquake-resistant bridge bearings for municipal roads. Background Technology

[0002] In modern bridge design, seismic performance is one of the important indicators for evaluating bridge quality. Seismic waves are divided into P-waves and S-waves, with S-waves causing more severe damage to bridges due to their horizontal movement. Therefore, the design of bridge seismic bearings needs to effectively cope with the impact of seismic S-waves to reduce damage to the bridge structure.

[0003] In the existing technology, there are many seismic bearings, but they have certain shortcomings in actual use. For example, a bridge seismic bearing with patent number CN202420175941.8 includes a horizontally arranged base, a damping seismic device and a seismic seat arranged on the base, a seismic seat arranged horizontally on the damping seismic device, a support assembly arranged vertically on the seismic seat, and a support seat arranged horizontally on the support assembly. Although the above-mentioned seismic bearing can buffer the vertical force on the bridge and play a certain seismic resistance role, it cannot buffer and consume the lateral moment received by the bridge. Therefore, its seismic resistance effect on the bridge is not good. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide seismic-resistant bridge bearings for municipal roads, so as to solve the problem that the existing seismic bearings have poor buffering effect on seismic shear waves.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A seismic-resistant bridge bearing for municipal roads includes an installation block, a column at the center of the installation block, one end of the column being ball-jointed to the installation block, a retaining ring at the edge of the installation block, one end of the retaining ring being fixed to the installation block, external threads on the outer surface of the column, a connecting column slidably fitted on the column, several circumferentially distributed transverse buffer springs on the outer surface of the connecting column, one end of each transverse buffer spring being fixedly connected to the connecting column, and the other end of each transverse buffer spring abutting against the inner side of the retaining ring, limiting nuts on both the upper and lower sides of the connecting column, the limiting nuts being threaded onto the external threads, and a support plate at the other end of the column, the middle of which is fixed to the column, the support plate being located above the retaining ring.

[0007] Furthermore, a telescopic component is provided below the mounting block. One end of the telescopic component is fixed to the mounting block, and a base plate is provided on the other end of the telescopic component. The base plate is fixed to the other end of the telescopic component. A vertical support spring is provided inside the telescopic component. One end of the vertical support spring is fixed to the mounting block, and the other end of the vertical support spring is fixed to the base plate.

[0008] Furthermore, the telescopic assembly includes an inner tube and an outer tube, with the outer side of the inner tube slidably connected to the inner side of the outer tube.

[0009] Furthermore, a plurality of first connecting blocks are provided circumferentially on the outer side surface of the inner tube, and the first connecting blocks are fixed to the outer side surface of the inner tube. A second connecting block is provided on the outer side surface of the outer tube, and the second connecting block is fixed to the outer side surface of the outer tube. A connecting rod is provided on the first connecting block and the second connecting block, and the connecting rod slides through the first connecting block and the second connecting block. Stops are provided at both ends of the connecting rod.

[0010] Furthermore, the base plate is provided with several anchor bolts.

[0011] Furthermore, a rubber pad is provided on one surface of the support plate that contacts the bridge deck, and the rubber pad is fixed to the support plate.

[0012] Furthermore, a corrugated tube is provided in the gap between the upper ends of the support plate and the retaining ring, and the two ends of the corrugated tube are respectively fixed and connected to the support plate and the retaining ring.

[0013] The beneficial effects of this utility model are as follows:

[0014] This device is installed between the bridge piers and the bridge deck. During an earthquake, under the action of seismic shear waves, the bridge deck and bridge bearings experience lateral forces. The friction between the bridge deck and the support plate causes the columns to deflect, compressing the lateral buffer springs to dissipate seismic energy. This reduces the force between the bridge deck and the support plate, preventing slippage and separation between them. It's easy to understand that the direction of the lateral force is random; therefore, the omnidirectional columns and the circumferentially arranged lateral buffer springs can buffer lateral moments in any direction, improving the cushioning effect of the bridge bearings.

[0015] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0017] Figure 1 This is a three-dimensional schematic diagram of the earthquake-resistant bridge bearing of this utility model;

[0018] Figure 2 This is a schematic internal sectional view of the earthquake-resistant bridge bearing of this utility model;

[0019] Figure 3 This is a three-dimensional schematic diagram of the internal structure of the earthquake-resistant bridge bearing of this utility model.

[0020] The following labels are shown in the attached diagram:

[0021] 1. Base plate; 2. External tube; 3. Internal tube; 4. Mounting block; 5. Retaining ring; 6. Support plate; 7. Vertical support spring; 8. Column; 9. Connecting column; 10. Horizontal buffer spring; 11. External thread; 12. Limiting nut; 13. First connecting block; 14. Second connecting block; 15. Connecting rod; 16. Stop block; 17. Anchor bolt. Detailed Implementation

[0022] like Figures 1-3 As shown, the municipal road seismic bridge bearing includes an installation block 4, a column 8 in the middle of the installation block 4, one end of the column 8 being ball-jointed to the installation block 4, the ball joint being a prior art, referring to the universal rotation ball joint connection method in the prior art, a retaining ring 5 on the edge of the installation block 4, one end of the retaining ring 5 being fixed to the installation block 4, an external thread 11 on the outer surface of the column 8, a connecting column 9 being slidably sleeved on the column 8, a plurality of circumferentially distributed transverse buffer springs 10 on the outer surface of the connecting column 9, one end of the transverse buffer spring 10 being fixedly connected to the connecting column 9, and the other end of the transverse buffer spring 10 abutting against the inner side of the retaining ring 5, a limiting nut 12 on both the upper and lower sides of the connecting column 9, the limiting nut 12 being threaded to the external thread 11, a support plate 6 on the other end of the column 8, the middle of the support plate 6 being fixed to the column 8, and the support plate 6 being located above the retaining ring 5.

[0023] The principle of the above technical solution is as follows:

[0024] This device is installed between the bridge pier and the bridge deck. When an earthquake occurs, under the action of seismic shear waves, the bridge deck and bridge bearings are subjected to lateral forces. The friction between the bridge deck and the support plate 6 causes the column 8 to deflect, thereby compressing the lateral buffer spring 10 to dissipate seismic energy. This reduces the force between the bridge deck and the support plate 6, preventing slippage and separation between the bridge deck and the bridge bearings. It is easy to understand that the direction of the lateral force is random; therefore, the omnidirectional column 8 and the circumferentially arranged lateral buffer spring 10 can buffer lateral moments in any direction, improving the buffering effect of the bridge bearings.

[0025] It is easy to understand that the limiting nut 12 can limit the position of the connecting column 9 on the column 8, thereby changing the position of the transverse buffer spring 10, and thus changing the fulcrum position of the column 8. This changes the deformation of the transverse buffer spring 10 when subjected to the same torque, allowing it to be adjusted according to different regions to match the actual local earthquake conditions. In other words, in areas where small earthquakes occur frequently, the transverse buffer spring 10 can be adjusted upwards, meaning that a smaller force will not cause it to deform, or the deformation will be small, thus avoiding the problem of long-term repeated large deformation leading to fatigue damage.

[0026] In one feasible embodiment, a telescopic assembly is provided below the mounting block 4. One end of the telescopic assembly is fixed to the mounting block 4, and a base plate 1 is provided on the other end of the telescopic assembly. The base plate 1 is fixed to the other end of the telescopic assembly. A vertical support spring 7 is provided inside the telescopic assembly. One end of the vertical support spring 7 is fixed to the mounting block 4, and the other end of the vertical support spring 7 is fixed to the base plate 1.

[0027] Of course, during an earthquake, the bridge piers and the bridge deck will also be subjected to vertical forces. At this time, the downward pressure of the bridge deck and the upward pressure of the bridge piers will compress the vertical support spring 7, so that the vertical support spring 7 can buffer the forces, thereby further improving the energy dissipation effect of the bridge bearing and further protecting the bridge. Of course, the vertical support spring 7 can also be replaced by a rubber column, that is, the support and stability effect of the rubber column is better.

[0028] In one feasible embodiment, the telescopic assembly includes an inner tube 3 and an outer tube 2, with the outer surface of the inner tube 3 slidably connected to the inner surface of the outer tube 2. A plurality of first connecting blocks 13 are circumferentially arranged on the outer surface of the inner tube 3, and the first connecting blocks 13 are fixed to the outer surface of the inner tube 3. A second connecting block 14 is arranged on the outer surface of the outer tube 2, and the second connecting block 14 is fixed to the outer surface of the outer tube. Connecting rods 15 are provided on the first connecting blocks 13 and the second connecting blocks 14, and the connecting rods 15 slide through the first connecting blocks 13 and the second connecting blocks 14. Stops 16 are provided at both ends of the connecting rods 15.

[0029] The sliding connection between the outer tube 2 and the inner tube 3 enables the telescopic function. At the same time, the first connecting block 13, the second connecting block 14, and the connecting rod 15 prevent the outer tube and the inner tube 3 from sliding out without affecting their vertical telescopic function. In this way, the telescopic component has a stable and reliable structure and will not come out, making it easy to transport, install, and disassemble.

[0030] In one feasible approach, the base plate 1 is provided with a number of anchor bolts 17 to fix the bridge support to the pier, which can prevent the support from shifting from the pier during an earthquake.

[0031] In one feasible embodiment, a rubber pad is provided on the surface of the support plate 6 that contacts the bridge deck. The rubber pad is fixed to the support plate 6 to increase friction, improve force transmission, and thus improve energy dissipation.

[0032] In one feasible embodiment, a corrugated tube is provided in the gap between the upper ends of the support plate 6 and the retaining ring 5, with both ends of the corrugated tube fixed and connected to the support plate 6 and the retaining ring 5 respectively, to prevent small animals from entering the interior of the retaining ring 5.

[0033] It is easy to understand that hydraulic dampers can be installed in this technical solution to suppress the vibration generated by the lateral buffer spring 10 and the vertical support spring 7. This is existing technology and will not be elaborated on further. Of course, it is also possible not to install them. The lateral buffer spring 10 and the vertical support spring 7 play a role in buffering and dissipating energy. During an earthquake, the weak vibrations of the two due to deformation and recovery of deformation will not have a significant impact on the structural stability of the bridge.

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. Seismic-resistant bridge bearings for municipal roads, characterized in that: The system includes a mounting block (4), a column (8) in the middle of the mounting block (4), one end of the column (8) being ball-jointed to the mounting block (4), a retaining ring (5) on the edge of the mounting block (4), one end of the retaining ring (5) being fixed to the mounting block (4), an external thread (11) on the outer surface of the column (8), a connecting column (9) slidably sleeved on the column (8), and several circumferentially distributed transverse buffer springs (10) on the outer surface of the connecting column (9). One end of the transverse buffer spring (10) is fixedly connected to the connecting column (9), and the other end of the transverse buffer spring (10) is abutted against the inner side of the retaining ring (5). The upper and lower sides of the connecting column (9) are provided with limiting nuts (12), and the limiting nuts (12) are threadedly connected to the external thread (11). The other end of the column (8) is provided with a support plate (6), and the middle part of the support plate (6) is fixed to the column (8). The support plate (6) is located above the retaining ring (5).

2. The seismic-resistant bridge bearing for municipal roads according to claim 1, characterized in that: A telescopic assembly is provided below the mounting block (4). One end of the telescopic assembly is fixed to the mounting block (4), and a base plate (1) is provided on the other end of the telescopic assembly. The base plate (1) is fixed to the other end of the telescopic assembly. A vertical support spring (7) is provided inside the telescopic assembly. One end of the vertical support spring (7) is fixed to the mounting block (4), and the other end of the vertical support spring (7) is fixed to the base plate (1).

3. The seismic-resistant bridge bearing for municipal roads according to claim 2, characterized in that: The telescopic assembly includes an inner tube (3) and an outer tube (2), with the outer side of the inner tube (3) slidably connected to the inner side of the outer tube (2).

4. The seismic-resistant bridge bearing for municipal roads according to claim 3, characterized in that: The inner tube (3) has a plurality of first connecting blocks (13) circumferentially arranged on the outer surface of the inner tube (3). The first connecting blocks (13) are fixed on the outer surface of the inner tube (3). The outer surface of the outer tube (2) has a second connecting block (14) fixed on the outer surface of the outer tube. The first connecting block (13) and the second connecting block (14) are provided with connecting rods (15). The connecting rods (15) slide through the first connecting block (13) and the second connecting block (14). The two ends of the connecting rods (15) are provided with stops (16).

5. The seismic-resistant bridge bearing for municipal roads according to claim 2, characterized in that: The base plate (1) is provided with several anchor bolts (17).

6. The seismic-resistant bridge bearing for municipal roads according to claim 1, characterized in that: A rubber pad is provided on one surface of the support plate (6) that contacts the bridge deck, and the rubber pad is fixed on the support plate (6).

7. The seismic-resistant bridge bearing for municipal roads according to claim 1, characterized in that: A corrugated pipe is provided in the gap between the upper ends of the support plate (6) and the retaining ring (5), and the two ends of the corrugated pipe are respectively fixed and connected to the support plate (6) and the retaining ring (5).

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