Steel structure bridge seismic mitigation and isolation support and assembly process thereof

Abstract

The invention discloses a steel structure bridge seismic mitigation and isolation support and an assembly process thereof, and relates to the technical field of bridge supports. The device comprises a bottom supporting plate, a mounting groove is formed in the top of the bottom supporting plate, a connecting table is mounted in the mounting groove, a top supporting plate is mounted at the top of the connecting table, adjusting sliding rods are symmetrically and fixedly connected to the four sides of the bottom supporting plate, and an abutting plate is fixedly connected to one ends of every two adjacent adjusting sliding rods. When a top supporting plate transmits vibration force of a bridge to a first transmission rod, the first transmission rod rotates around a hinge shaft, a transmission sliding plate is pushed to move in the length direction of an adjusting sliding rod, and meanwhile an expansion plate is pushed to move upwards in cooperation with a transmission assembly and a guide mechanism and abuts against the bottom of the bridge; therefore, the vibration force is converted into the supporting force of the expansion plate to the bridge, and the supporting stability of the top supporting plate to the bridge is enhanced while the supporting area of the top supporting plate to the bridge is increased.

Description

Technical Field

[0001] The present application relates to the technical field of bridge bearings, and in particular to a seismic isolation bearing for a steel structure bridge and an assembly process thereof. Background Art

[0002] With the rapid development of modern bridge engineering technology, the requirements for the safety and stability of bridge structures are increasing. Especially in areas where natural disasters such as earthquakes occur frequently, the seismic performance of bridges is particularly important. Steel structure bridges have been widely used in modern bridge construction due to their advantages such as light weight, high strength and fast construction speed. In the field of bridge engineering, seismic isolation bearings are key components to ensure that bridge structures maintain stability and safety during natural disasters such as earthquakes.

[0003] Traditional seismic isolation bearing structures usually use a combination of rubber pads and dampers to achieve seismic isolation effects. Rubber pads can absorb the energy generated by earthquakes, while dampers can consume the vibration energy generated by earthquakes. The two work together to effectively reduce the impact of earthquakes on bridge structures.

[0004] However, this structure also has certain limitations. Since the rubber pad and damper are usually fixed between the bridge and the top support plate, the connection between the two is prone to loosening or damage as the bridge vibrates, resulting in an offset between the bridge and the top support plate. This offset not only affects the seismic isolation effect, but may also cause more serious damage to the bridge structure and reduce the safety of the seismic isolation bearing. Summary of the invention

[0005] The purpose of the present application is to solve the problem that as the bridge vibrates, the connection between the two is prone to loosening or damage, resulting in an offset between the bridge and the top support plate, and reducing the safety of the seismic isolation bearing. The present application provides a steel structure bridge seismic isolation bearing and its assembly process.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: The top of the adjusting board is hinged with a transmission rod 1, and the top of the transmission rod 1 is hinged with the bottom of the top supporting board, and one end of the contact plate is sleeved with a resistance spring, and the resistance spring is installed between the adjusting board and the contact plate.

[0007] By adopting the above technical scheme and setting up the coordinated use of the transmission assembly and the guide mechanism, it is convenient for the top support plate to transmit the vibration force received by the bridge to the transmission rod 1, so that the transmission rod 1 rotates around the hinge axis and pushes the transmission slide plate to move along the length direction of the adjustment slide rod. At the same time, the transmission assembly and the guide mechanism are used to push the expansion plate to move upward and form a resistance with the bottom of the bridge, thereby converting the vibration force into the supporting force of the expansion plate on the bridge, thereby increasing the supporting area of ​​the top support plate on the bridge while strengthening the supporting stability of the top support plate on the bridge, thereby effectively improving the safety of the device.

[0008] Furthermore, the transmission assembly includes a transmission rod 2 hinged at the top of the adjusting slide rod, one end of the transmission rod 2 is hinged to the bottom of the expansion plate, the top of the resistance plate is hinged with a transmission rod 3, and the top end of the transmission rod 3 is hinged to the middle section of the transmission rod 2.

[0009] By adopting the above technical scheme and arranging the coordinated use of transmission rod two and transmission rod three, when the top support plate is pushed by the pressure of the bridge to drive the transmission slide plate to move along the length direction of the adjusting slide bar, the transmission slide plate pushes the transmission rod two to rotate around the hinge axis, and drives the transmission rod three to form a support for the transmission rod two with the resistance plate as the fulcrum, so that the transmission rod three pushes the transmission rod two to eject the expansion plate, and drives the expansion plate to form a support for the bottom of the bridge, thereby effectively improving the stability of the device.

[0010] Furthermore, the guiding mechanism includes a guide slide rod fixedly connected, a guide slider is installed at one end of the contact plate, a guide through hole adapted to the guide slide rod is opened at one end of the guide slider, and a follower component for driving the guide slider to move along the length direction of the adjustment slide rod is installed at one end of the contact plate.

[0011] By adopting the above technical scheme, by setting the follower component for use with the guide slide rod and the guide slider, when the drive rod 2 is driven to push out the expansion plate around the hinge axis, the expansion plate drives the guide slide rod to move through the guide perforation, and cooperates with the follower component to guide the guide slide rod to move along the length direction of the adjustment slide rod along the deflection direction of the drive rod 2 and the drive rod 3, so that the drive rod 2 can push the expansion plate to move along the length direction of the guide slide rod, thereby improving the practicability of the device.

[0012] Furthermore, the follower assembly includes a follower track opened at one end of the contact plate, a follower slide groove is symmetrically opened on the inner side of the follower track, and a follower slider adapted to the follower slide groove is symmetrically fixedly connected to one end of the guide slider.

[0013] By adopting the above technical solution and setting the coordinated use of the follower slide groove and the follower slider, it is convenient that when the driving transmission rod 2 drives the expansion plate to move around the hinge axis, the expansion plate drives the guide slider through the guide perforation through the guide slide rod to push the follower slider to move along the length direction of the follower slide groove, thereby facilitating the driving of the guide slider to move along the length direction of the follower slide groove as the transmission rod 2 is deflected, reducing the jamming problem between the guide slide rod and the guide slider and improving the smoothness of the device.

[0014] Furthermore, the buffer assembly includes a buffer groove opened on the top of the connecting platform, a buffer slider is fixedly connected to the bottom of the top support plate, a damper is fixedly connected inside the buffer groove, one end of the buffer slider is slidably connected inside the buffer groove and forms a conflict with one end of the damper, one end of the connecting platform is fixedly connected to a rubber ring pad, and the top of the rubber ring pad is fixedly connected to the bottom of the top support plate.

[0015] By adopting the above technical solution, by setting up the coordinated use of the damper and the rubber ring pad, the top support plate pushes the buffer slider to squeeze the damper and the rubber ring pad to produce contraction deformation, thereby utilizing the deformation and contraction of the rubber ring pad and the damper to absorb and weaken the vibration force transmitted by the top support plate, thereby reducing the vibration intensity of the vibration force transmitted by the top support plate to the connecting platform and the mounting groove.

[0016] Furthermore, leaf springs are fixedly connected to four outer sides of the connecting platform, and one end of the leaf spring is in contact with the inner side of the mounting groove.

[0017] By adopting the above technical solution, by setting the leaf spring and the connecting platform for use together, when the connecting platform is moved toward the four sides of the inside of the installation groove due to the vibration force transmitted by the top support plate, the rebound deformation of the leaf spring is used to offset part of the vibration force, thereby further improving the stability of the device.

[0018] Furthermore, the four corners of the top support plate and the bottom support plate are fixedly connected with fixed ear plates, and the top of the top support plate and the bottom of the bottom support plate are fixedly connected with annular locking nail plates. The four corners of the top support plate and the bottom support plate are fixedly connected with fixed ear plates, and the top of the top support plate and the bottom of the bottom support plate are fixedly connected with annular locking nail plates.

[0019] By adopting the above technical solution, by setting the fixed ear plate and the annular locking nail plate for use together, it is convenient to drive the annular locking nail plate to form a conflict with the bridge or pier when the bolts are passed through the fixed ear plate to fix the bridge or pier, and the annular locking nail plate is used to effectively increase the friction between the top support plate, the bottom support plate and the bridge, the pier, and further improve the stability of the device.

[0020] An assembly process for a seismic isolation bearing of a steel structure bridge, comprising: S1: First, fix the bottom support plate to the pier column by fixing the lugs and bolts to ensure stability without shaking; S2: Then the connecting platform is placed in the installation groove, and the connecting platform drives the leaf spring to form a conflict with the inner side of the installation groove, and at the same time, the damper is fixedly placed in the buffer slide groove, so that the damper and the buffer slide block form a conflict; S3: Then use rubber ring pads to ensure smooth contact between the top support plate and the connecting platform, and then fix the top support plate to the bottom of the bridge by fixing the ear plates and fasteners such as bolts; S4: Finally, the pressure exerted by the bridge on the top support plate is used to push the transmission rod 1 to cooperate with the transmission rod 2 and the transmission rod 3 to drive the expansion plate to move along the length direction of the guide slide bar, and drive one end of the expansion plate to form a resistance support with the bottom of the bridge.

[0021] In summary, the present application includes at least one of the following beneficial effects: 1. By setting up the coordinated use of the transmission assembly and the guide mechanism, it is convenient for the top support plate to transmit the vibration force of the bridge to the transmission rod 1, so that the transmission rod 1 rotates around the hinge axis and pushes the transmission slide plate to move along the length direction of the adjustment slide rod. At the same time, the transmission assembly and the guide mechanism are used to push the expansion plate to move upward and form a resistance with the bottom of the bridge, so as to convert the vibration force into the support force of the expansion plate on the bridge, thereby increasing the supporting area of ​​the top support plate on the bridge while strengthening the support stability of the top support plate on the bridge, and effectively improving the safety of the device.

[0022] 2. By setting up the coordinated use of transmission rod 2 and transmission rod 3, when the top support plate is pushed by the pressure of the bridge to drive the transmission slide plate to move along the length direction of the adjusting slide bar, the transmission slide plate pushes the transmission rod 2 to rotate around the hinge axis, driving the transmission rod 3 to form a support for the transmission rod 2 with the resistance plate as the fulcrum, so that the transmission rod 3 pushes the transmission rod 2 to eject the expansion plate, and drives the expansion plate to support the bottom of the bridge, effectively improving the stability of the device.

[0023] 3. By setting up the cooperation of the follower component with the guide slide rod and the guide slider, when the drive rod 2 is driven to push out the expansion plate around the hinge axis, the expansion plate drives the guide slide rod to move through the guide through hole, and cooperates with the follower component to guide the guide slide rod to move along the length direction of the adjustment slide rod along the deflection direction of the drive rod 2 and the drive rod 3, so that the drive rod 2 can push the expansion plate to move along the length direction of the guide slide rod, thereby improving the practicability of the device.

[0024] 4. By setting up the coordinated use of the follower slide groove and the follower slider, when the driving transmission rod 2 drives the expansion plate to move around the hinge axis, the expansion plate drives the guide slider through the guide through the guide hole to push the follower slider to move along the length direction of the follower slide groove, thereby facilitating the driving of the guide slider to move along the length direction of the follower slide groove as the transmission rod 2 is deflected, reducing the jamming problem between the guide slider and the guide slider, and improving the smoothness of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0026] Figure 2 It is an exploded view of the internal structure of the mounting slot in this application.

[0027] Figure 3 It is a schematic diagram of the connection relationship between the transmission rod 2 and the transmission rod 3 in this application.

[0028] Figure 4 It is a three-dimensional structural schematic diagram of the guiding mechanism in this application.

[0029] Description of reference numerals: 1. Bottom support plate; 2. Mounting groove; 3. Connecting platform; 4. Top support plate; 5. Adjusting slide bar; 6. Resistance plate; 7. Transmission slide plate; 8. Resistance spring; 9. Transmission rod one; 10. Extension plate; 11. Transmission rod two; 12. Transmission rod three; 13. Guide slide bar; 14. Guide slider; 15. Guide perforation; 16. Follow-up track; 17. Follow-up slide groove; 18. Follow-up slider; 19. Buffer slide groove; 20. Buffer slider; 21. Damper; 22. Rubber ring pad; 23. Leaf spring; 25. Fixed ear plate; 26. Annular locking nail plate. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 This application is described in further detail.

[0031] The embodiment of the present application discloses a seismic isolation bearing for a steel structure bridge and an assembly process thereof.

[0032] Reference Figure 1-Figure 4 The top of the adjusting slide bar 5 is hinged with a transmission rod 9, and the top of the transmission rod 9 is hinged with the bottom of the top supporting plate 4. An extension plate 10 is installed at one end of the extension plate 6, and a transmission component for driving the extension plate 10 to lift and lower is installed at one end of the extension plate 6. A guide mechanism for guiding the extension plate 10 to lift and lower is installed at one end of the connecting platform 3. A buffer component for weakening the vibration intensity of the top supporting plate 4 is installed at one end of the connecting platform 3. The transmission assembly includes a transmission rod 2 11 hinged on the top of the adjustment slide rod 5, one end of the transmission rod 2 11 is hinged to the bottom of the expansion plate 10, a transmission rod 3 12 is hinged to the top of the contact plate 6, and the top end of the transmission rod 3 12 is hinged to the middle section of the transmission rod 2 11; Moreover, the guiding mechanism includes a guide slide bar 13 fixedly connected, a guide slider 14 is installed at one end of the contact plate 6, a guide through hole 15 adapted to the guide slide bar 13 is opened at one end of the guide slider 14, and a follower component for driving the guide slider 14 to move along the length direction of the adjustment slide bar 5 is installed at one end of the contact plate 6; Furthermore, the follower assembly includes a follower track 16 opened at one end of the contact plate 6 , a follower slot 17 is symmetrically opened on the inner side of the follower track 16 , and a follower slider 18 adapted to the follower slot 17 is symmetrically fixedly connected to one end of the guide slider 14 .

[0033] When in use, first, when the bridge vibrates and transmits the vibration force to the top support plate 4, the top support plate 4 squeezes the transmission rod 1 9 around the hinge axis to rotate, and one end of the transmission rod 1 9 rotates around the hinge axis, and pushes the transmission slide plate 7 to move along the length direction of the adjustment slide bar 5, and at the same time, the transmission slide plate 7 squeezes the resistance spring 8 to produce a contraction deformation, and the adjustment slide bar 5 pushes the transmission rod 2 11 to deflect around the hinge axis, and at the same time, one end of the transmission rod 2 11 pushes the transmission rod 3 12 to deflect around the hinge axis, and the other end of the transmission rod 3 12 uses the resistance plate 6 as a fulcrum to form a support for the middle section of the transmission rod 2 11, and at the same time, one end of the transmission rod 2 11 pushes the expansion plate 10 to move around the hinge axis; At the same time, the transmission rod 11 pushes the expansion plate 10 to drive the guide slide bar 13 to pass through the guide through hole 15, and drives the guide slide block 14 to move along the length direction of the follower slide groove 17, so that the transmission rod 11 pushes the expansion plate 10 to move upward along the length direction of the guide slide bar 13, and cooperates with the top support plate 4 to form support for the bottom of the bridge, thereby increasing the support area of ​​the top support plate 4 for the bridge and strengthening the stability of the top support plate 4 supporting the bridge; When the downward vibration force of the bridge is transmitted to the transmission slide plate 7 through the top support plate 4 via the transmission rod 1 9, the transmission slide plate 7 transmits the received vibration force to the expansion plate 10 via the transmission rod 2 11 and the transmission rod 3 12, and forms a resistance with the bridge through the expansion plate 10, and converts the vibration force into the supporting force of the expansion plate 10 on the bridge, thereby further improving the stability of the device, thereby facilitating the use of the expansion plate 10 to convert part of the vibration force borne by the top support plate 4 into the supporting force for the bridge, thereby increasing the supporting area of ​​the top support plate 4 for the bridge and improving the supporting stability of the top support plate 4 for the bridge, thereby effectively improving the safety of the device.

[0034] Reference Figure 1 and Figure 2 The buffer assembly includes a buffer chute 19 opened on the top of the connecting platform 3, a buffer slider 20 is fixedly connected to the bottom of the top support plate 4, a damper 21 is fixedly connected inside the buffer chute 19, one end of the buffer slider 20 is slidably connected inside the buffer chute 19 and forms a conflict with one end of the damper 21, and a rubber ring pad 22 is fixedly connected to one end of the connecting platform 3, and the top of the rubber ring pad 22 is fixedly connected to the bottom of the top support plate 4; The four outer sides of the connecting platform 3 are all fixedly connected with leaf springs 23 , and one end of the leaf spring 23 is in contact with the inner side of the mounting groove 2 .

[0035] When in use, when the top support plate 4 is subjected to the force generated by the vibration of the bridge, the top support plate 4 pushes the buffer slider 20 to move along the length direction of the buffer slide groove 19, and the buffer slider 20 pushes the damper 21 to produce a contraction deformation, and at the same time, the top support plate 4 cooperates with the connecting platform 3 to squeeze the rubber ring pad 22 to produce a contraction deformation, so as to utilize the deformation and contraction stroke of the rubber ring pad 22 and the damper 21 to absorb and weaken the vibration force transmitted by the top support plate 4, thereby reducing the vibration intensity of the vibration force transmitted by the top support plate 4 on the connecting platform 3 and the mounting groove 2; When the top support plate 4 transmits the vibration force of the bridge to the connecting platform 3, it drives the connecting platform 3 to push the leaf spring 23 to form a conflict with the four inner sides of the installation groove 2 and produce elastic deformation. At the same time, the rebound characteristics of the leaf spring 23 are utilized to rebound and push the connecting platform 3 to move to the middle of the installation groove 2, and offset part of the force transmitted to the connecting platform 3 by the top support plate 4, pushing the connecting platform 3 to move to the four inner sides of the installation groove 2, thereby further improving the stability of the device.

[0036] Reference Figure 1 and Figure 2 The four corners of the top support plate 4 and the bottom support plate 1 are fixedly connected with fixed ear plates 25, and the top of the top support plate 4 and the bottom of the bottom support plate 1 are fixedly connected with an annular locking nail plate 26. The four corners of the top support plate 4 and the bottom support plate 1 are fixedly connected with fixed ear plates 25, and the top of the top support plate 4 and the bottom of the bottom support plate 1 are fixedly connected with an annular locking nail plate 26.

[0037] When in use, when the bolts are passed through the fixing ear plates 25 to drive the top support plate 4 and the bottom support plate 1 to be fixedly connected to the bridge and the pier respectively, the top support plate 4 and the bottom support plate 1 respectively drive the annular locking nail plates 26 to form a fixed contact with the bridge pier, thereby effectively improving the friction and stability between the top support plate 4, the bottom support plate 1 and the bridge and the pier.

[0038] An assembly process for a seismic isolation bearing of a steel structure bridge, comprising: S1: First, fix the bottom support plate 1 on the pier column by fixing the ear plate 25 and bolts and other fasteners to ensure stability without shaking; S2: Then the connecting platform 3 is placed in the installation groove 2, and the connecting platform 3 drives the leaf spring 23 to form a conflict with the inner side of the installation groove 2, and at the same time, the damper 21 is fixedly placed in the buffer slide groove 19, so that the damper 21 forms a conflict with the buffer slider 20; S3: Then use the rubber ring pad 22 to ensure the smooth contact between the top support plate 4 and the connecting platform 3, and then fix the top support plate 4 to the bottom of the bridge by fixing the ear plate 25 and fasteners such as bolts; S4: Finally, by utilizing the pressure exerted by the bridge on the top support plate 4, the transmission rod 1 9 is pushed to cooperate with the transmission rod 2 11 and the transmission rod 3 12 to drive the expansion plate 10 to move along the length direction of the guide slide rod 13, and drive one end of the expansion plate 10 to form a resistance support with the bottom of the bridge.

[0039] The implementation principle of a seismic isolation bearing for a steel structure bridge and its assembly process in this embodiment is as follows: first, when the top support plate 4 is subjected to the force generated by the vibration of the bridge, the top support plate 4 pushes the buffer slider 20 to move along the length direction of the buffer slide groove 19, and the buffer slider 20 pushes the damper 21 to produce a contraction deformation, and at the same time, the top support plate 4 cooperates with the connecting platform 3 to squeeze the rubber ring pad 22 to produce a contraction deformation, and at the same time, the top support plate 4 drives the connecting platform 3 to push the leaf spring 23 to form a conflict with the four inner sides of the installation groove 2 and produce elastic deformation, and at the same time, the rebound characteristics of the leaf spring 23 are utilized to rebound and push the connecting platform 3 to move to the middle of the installation groove 2, and offset part of the force transmitted to the connecting platform 3 by the top support plate 4, pushing the connecting platform 3 to move to the four inner sides of the installation groove 2; Then, the top support plate 4 squeezes the transmission rod 1 9 around the hinge axis to rotate, and one end of the transmission rod 1 9 rotates around the hinge axis, and pushes the transmission slide plate 7 to move along the length direction of the adjustment slide bar 5, and at the same time, the transmission slide plate 7 squeezes the resistance spring 8 to produce a contraction deformation, and the adjustment slide bar 5 pushes the transmission rod 2 11 to deflect around the hinge axis, and at the same time, one end of the transmission rod 2 11 pushes the transmission rod 3 12 to deflect around the hinge axis, and the other end of the transmission rod 3 12 uses the resistance plate 6 as a fulcrum to form a support for the middle section of the transmission rod 2 11; At the same time, the transmission rod 11 pushes the expansion plate 10 to drive the guide slide bar 13 to pass through the guide through hole 15, and drives the guide slide block 14 to move along the length direction of the follower slide groove 17, so that the transmission rod 11 pushes the expansion plate 10 to move upward along the length direction of the guide slide bar 13, and cooperates with the top support plate 4 to support the bottom of the bridge; When the downward vibration force of the bridge is transmitted to the transmission slide plate 7 through the top support plate 4 via the transmission rod 1 9, the transmission slide plate 7 transmits the received vibration force to the expansion plate 10 via the transmission rod 2 11 and the transmission rod 3 12, and forms a resistance with the bridge through the expansion plate 10, and converts the vibration force into the supporting force of the expansion plate 10 on the bridge, thereby further improving the stability of the device, so that it is convenient to use the expansion plate 10 to convert part of the vibration force borne by the top support plate 4 into the supporting force for the bridge.

Claims

1. A seismic isolation bearing for a steel structure bridge, comprising a bottom support plate (1), characterized in that: The top of the bottom support plate (1) is provided with a mounting groove (2), a connecting platform (3) is installed inside the mounting groove (2), a top support plate (4) is installed on the top of the connecting platform (3), four sides of the bottom support plate (1) are symmetrically fixedly connected with adjustment slide bars (5), one end of two adjacent adjustment slide bars (5) is fixedly connected with a resistance plate (6), one end of the adjustment slide bar (5) is slidably connected with a transmission slide plate (7), and one end of the adjustment slide bar (5) is sleeved with a resistance spring (8), and the resistance spring (8) is installed on the adjustment slide bar (5). ) and the contact plate (6), a transmission rod (9) is hinged on the top of the adjusting slide bar (5), the top of the transmission rod (9) is hinged to the bottom of the top support plate (4), an extension plate (10) is installed at one end of the contact plate (6), a transmission component for driving the extension plate (10) to move up and down is installed at one end of the adjusting slide bar (5), a guiding mechanism for guiding the extension plate (10) to move up and down is installed at one end of the contact plate (6), and a buffer component for reducing the vibration intensity of the top support plate (4) is installed at one end of the connecting platform (3).

2. The seismic isolation bearing for a steel structure bridge according to claim 1, characterized in that: The transmission assembly comprises a transmission rod 2 (11) hinged on the top of the adjustment slide rod (5), one end of the transmission rod 2 (11) is hinged to the bottom of the expansion plate (10), the top of the contact plate (6) is hinged to a transmission rod 3 (12), and the top end of the transmission rod 3 (12) is hinged to the middle section of the transmission rod 2 (11).

3. The seismic isolation bearing for a steel structure bridge according to claim 1, characterized in that: The guide mechanism comprises a guide slide bar (13) fixedly connected thereto; a guide slider (14) is mounted on one end of the contact plate (6); a guide through hole (15) adapted to the guide slide bar (13) is formed on one end of the guide slide bar (14); and a follower assembly for driving the guide slide bar (14) to move along the length direction of the adjustment slide bar (5) is mounted on one end of the contact plate (6).

4. The seismic isolation bearing for a steel structure bridge according to claim 3 is characterized by: The follower assembly comprises a follower track (16) provided at one end of the contact plate (6), a follower slide groove (17) being symmetrically provided on the inner side of the follower track (16), and a follower slide block (18) adapted to the follower slide groove (17) being symmetrically fixedly connected to one end of the guide slide block (14).

5. The seismic isolation bearing for a steel structure bridge according to claim 1, characterized in that: The buffer assembly comprises a buffer chute (19) opened on the top of the connecting platform (3); a buffer slider (20) is fixedly connected to the bottom of the top support plate (4); a damper (21) is fixedly connected inside the buffer chute (19); one end of the buffer slider (20) is slidably connected inside the buffer chute (19) and forms a conflict with one end of the damper (21); one end of the connecting platform (3) is fixedly connected to a rubber ring pad (22); and the top of the rubber ring pad (22) is fixedly connected to the bottom of the top support plate (4).

6. The seismic isolation bearing for a steel structure bridge according to claim 1, characterized in that: The four outer sides of the connecting platform (3) are all fixedly connected with leaf springs (23), and one end of the leaf spring (23) is in contact with the inner side of the mounting groove (2).

7. The seismic isolation bearing for a steel structure bridge according to claim 1, characterized in that: The four corners of the top support plate (4) and the bottom support plate (1) are fixedly connected with fixed ear plates (25), and the top of the top support plate (4) and the bottom of the bottom support plate (1) are fixedly connected with an annular locking nail plate (26).

8. The assembly process of the seismic isolation bearing for a steel structure bridge according to any one of claims 1 to 7 is characterized in that: include: S1: First, fix the bottom support plate (1) to the pier column by means of fixing lug plates (25) and bolts and other fasteners to ensure that it is stable and does not shake; S2: Then, the connecting platform (3) is placed in the installation groove (2), and the connecting platform (3) drives the leaf spring (23) to form a conflict with the inner side of the installation groove (2), and at the same time, the damper (21) is fixedly placed in the buffer slide groove (19), so that the damper (21) and the buffer slide block (20) form a conflict; S3: Then, a rubber ring pad (22) is used to ensure a smooth contact between the top support plate (4) and the connecting platform (3), and then the top support plate (4) is fixed to the bottom of the bridge by fixing the ear plate (25) and fasteners such as bolts; S4: Finally, the pressure exerted by the bridge on the top support plate (4) is used to push the transmission rod 1 (9) to cooperate with the transmission rod 2 (11) and the transmission rod 3 (12) to drive the expansion plate (10) to move along the length direction of the guide slide rod (13), and drive one end of the expansion plate (10) to form a resistance support with the bottom of the bridge.

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