Bridge anti-seismic support and construction method thereof

Abstract

The invention relates to the technical field of bridge supports, in particular to a bridge anti-seismic support and a construction method thereof.The bridge anti-seismic support comprises a pier and a bridge plate, a mounting frame is fixedly connected to the outer wall of the top end of the pier, an inner sliding frame is slidably connected to the inner wall of the top of the mounting frame, and a top connecting plate is fixedly connected to the outer wall of the top end of the inner sliding frame; arc-shaped plates are fixedly connected to the outer walls of the bottom ends of the bridge plate blocks, and first sliding grooves are formed in the outer walls of the bottom ends of the arc-shaped plates; during vibration, the elastic rods can serve as flexible connection between structures, certain relative movement is allowed, stress concentration of the structures is reduced, seismic resistance is enhanced, meanwhile, the prestressed ropes are further arranged on the two sides of the arc-shaped plate, the seismic support is further reinforced, the seismic structure is optimized, the seismic structure is in multiple sliding connection, and the service life of the seismic support is prolonged. The bridge anti-seismic support cannot fall off during seismic resistance and is convenient to disassemble, assemble and replace when damaged, the maintenance cost is reduced, and the anti-seismic efficiency of the bridge anti-seismic support is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge bearings, and in particular to an anti-seismic bridge bearing and a construction method thereof. Background Art

[0002] The reason why the bridge deck falls from the pier beam is that when strong winds blow through the bridge or the vibration pressure from the outside is too great, large horizontal and vertical forces are generated, causing the prefabricated bridge deck to shift horizontally and up and down. When the displacement exceeds the resting width of the prefabricated bridge deck on the pier, the bridge deck will fall. At this time, not only is the bridge damaged, but pedestrians and vehicles on and under the bridge will also face major safety hazards.

[0003] After searching the Chinese patent with publication number CN205975347U, a seismic bearing for a bridge is disclosed. When an earthquake occurs, the bridge is subjected to a vertical downward force, and the vertical rod squeezes the first elastic member, which can convert kinetic energy into potential energy, reducing the degree of damage to the bridge. The card block is inserted into the spherical groove, and the trapezoidal block is inserted into the trapezoidal groove to prevent the horizontal displacement of the bridge, making the bridge structure more stable, reducing damage to the bridge, reducing vibration, unloading force, and having the effect of low cost; the patent has a novel structure, strong practicality, low manufacturing cost, and easy maintenance. It can effectively release seismic loads and protect the bridge.

[0004] Based on the above search and combined with the prior art, it is found that the above patents have certain defects. The seismic bearings of bridges are mostly fixed structures. The use of solid materials such as reinforced concrete and steel structures can significantly improve the overall strength and durability of the building. These materials can withstand large loads in earthquakes and are not easily damaged. However, excessive rigidity may cause the building to absorb too much seismic energy during vibration, which in turn increases the risk of structural damage, resulting in poor seismic effect and difficult disassembly and assembly of the structure. The damaged parts of the seismic bearings cannot be replaced in time, resulting in high maintenance costs, which reduces the seismic efficiency of the bridge seismic bearings. Summary of the invention

[0005] The object of the present invention is to provide a bridge seismic bearing and a construction method thereof to solve the problems raised in the above-mentioned background technology.

[0006] The technical solution of the present invention is: a bridge seismic bearing, comprising a pier and a bridge plate, the top outer wall of the pier is fixedly connected with a mounting frame, the top inner wall of the mounting frame is slidably connected with an inner sliding frame, the top outer wall of the inner sliding frame is fixedly connected with a top connecting plate, the bottom outer wall of the bridge plate is fixedly connected with an arc plate, the bottom outer wall of the arc plate is provided with a slide groove 1, the arc plate is slidably connected with an inner wall of the slide groove 1, the outer walls on both sides of the bottom end of the arc plate are provided with slide grooves 2, the inner wall of the slide groove 2 is slidably connected with side connecting plates, the outer walls on both sides of the bottom end of the side connecting plates are fixedly connected with elastic rods, the top inner wall of the inner sliding frame is fixedly connected with an upper seismic plate, and the four corners of the outer wall of the bottom end of the upper seismic plate are fixedly connected with brackets 1. The bottom inner wall of the mounting frame is fixedly connected with a lower seismic plate, and a shock absorber 1 is installed at the four corners of the top outer wall of the lower seismic plate; the four corners of the bottom inner wall of the mounting frame are fixedly connected with a bracket 2; the inner walls of the bracket 1 and the bracket 2 are rotatably provided with a rotating shaft, the outer wall of the rotating shaft is fixedly connected with a shock absorber 2, one end of the piston rod of the shock absorber 1 is fixedly connected to the top inner wall of the inner sliding frame, the outer walls of both sides of the mounting frame are fixedly connected with a mounting bracket, and a winding roller is rotatably provided on the bottom inner wall of the mounting bracket, a plurality of mounting grooves are opened on the outer walls of both sides of the bottom of the arc plate, the inner wall of the mounting groove is slidably connected with a mounting block, the bottom outer wall of the mounting block is fixedly connected with a prestressed rope, and the prestressed rope is fixedly connected to the outer wall of the winding roller.

[0007] Preferably, the top of the top connecting plate is arc-shaped, the size of the top connecting plate is adapted to the arc-shaped plate, buffer pads are fixedly connected to the outer walls on both sides of the top connecting plate, the slide groove one and the slide groove two are connected, and the size of the side connecting plate is adapted to the top connecting plate.

[0008] Preferably, connecting grooves are provided on both side outer walls of the bottom of the installation frame, the elastic rod is arranged in an arc shape, and a connecting protrusion is provided on one side outer wall of the bottom of the elastic rod, and the connecting protrusion is slidably connected to the inner wall of the connecting groove.

[0009] Preferably, the mounting grooves are distributed in an arc-shaped array, a plurality of connection holes are opened on the top outer wall of the mounting frame, the connection holes are distributed in a linear array, and the prestressed ropes are slidably connected to the inner walls of the connection holes.

[0010] Preferably, limiting holes are opened on the outer walls on both sides of the bottom of the mounting frame, and a plurality of limiting grooves are opened on the outer walls on both sides of the winding roller. The limiting grooves are distributed in a circular array, and the sizes of the limiting grooves are adapted to the limiting holes. The outer walls on both sides of the winding roller are fixedly connected with nuts.

[0011] Preferably, the prestressed rope is made of high-strength polyethylene fiber, the inner sliding frame is slidably connected to the top inner wall of the installation frame, and the bottom outer wall of the installation frame is provided with a mounting hole.

[0012] Preferably, the bottom outer wall of the pier is fixedly connected to a base, the top outer wall of the base is fixedly connected to a pouring frame, and the top outer wall of the pouring frame is provided with a pouring groove.

[0013] A construction method for a bridge seismic bearing comprises the following steps:

[0014] S1: First, the bridge pier and the base are fixed and connected to the ground pile foundation. After the fixing is completed, the installation frame is fixed on the top of the bridge pier, and the inner sliding frame is connected by sliding on the inner wall of the top of the installation frame. The top connecting plate is fixed on the top of the inner sliding frame, and the arc plate and the bridge plate are arranged on the top of the top connecting plate. The bridge is composed of multiple bridge plates spliced ​​together;

[0015] S2: When strong winds blow over the bridge or the vibration pressure from the outside is too large, the bridge shakes. The top connecting plate can slide in a small range in the slide groove 1 of the arc plate at the bottom of the bridge plate. The internal bridge plate will also press the inner sliding frame. The upper and lower earthquake-resistant plates inside the inner sliding frame and the installation frame cooperate with shock absorbers 1 and 2 to reduce shock. The external elastic rod is connected to the arc plate and the outer wall of the installation frame through the side connecting plate and the connecting protrusion. The deformation during vibration can reduce the direct impact on the building structure and reduce the stress concentration of the structure.

[0016] S3: The winding rollers and prestressed ropes are arranged on both sides of the installation frame. The tightness of the prestressed ropes is adjusted according to the seismic requirements. The prestressed ropes are slidably connected to the installation grooves of the arc plates through the installation blocks, so that the bridge can resist external forces more effectively, thereby improving the overall stability and safety of the bridge;

[0017] S4: The internal and external seismic structures cooperate with prestressed ropes to improve the seismic effect of the bridge's seismic bearings. The seismic structures are mostly sliding connections, and the direction they are subjected to during earthquakes will not cause the structure to fall off. If part of the structure is damaged, the corresponding seismic structure can be pulled out and replaced. The disassembly and assembly operations are simple and the maintenance cost is low. A pouring frame and a base are set at the bottom of the pier. When fixing the pier, cement can be poured into the pouring groove to further optimize the seismic structure of the pier.

[0018] The present invention provides a bridge seismic bearing and a construction method thereof through improvement, which has the following improvements and advantages compared with the prior art:

[0019] The invention provides a bridge pier, an installation frame, an inner sliding frame, a top connecting plate, an arc plate, a prestressed rope and an elastic rod. The arc plate and the bridge plate will slide in a small range on the top connecting plate. At the same time, the upper and lower earthquake-resistant plates in the inner sliding frame and the installation frame cooperate with shock absorbers 1 and 2 to resist earthquakes for the structure. Slide slots 2 are provided on both sides of the slide slots 1, and side connecting plates are slidably connected. The top connecting plate is limited while the buffer pad is cooperated to further improve the earthquake resistance. The elastic rods on the side connecting plates are connected to the installation frame. During vibration, the elastic rods can be used as flexible connections between structures to allow a certain relative movement, thereby reducing the stress concentration of the structure and enhancing the earthquake resistance. At the same time, prestressed ropes are also provided on both sides of the arc plate to further reinforce the earthquake-resistant bearings and optimize the earthquake-resistant structure. The earthquake-resistant structure has multiple sliding connections and can be disassembled and assembled only by applying force from the side. It will not fall off during earthquake resistance and is convenient to disassemble and replace when damaged, thereby reducing the maintenance cost and improving the earthquake resistance efficiency of the bridge earthquake-resistant bearings.

[0020] Second: The present invention is provided with an installation frame, a winding roller, a limiting hole, a nut and a limiting groove. The winding roller is rotatably arranged on the bottom inner wall of the installation frame. The nuts on both sides of the winding roller rotate to control the winding of the prestressed rope. The size of the prestress can be adjusted, which is convenient for adjustment according to the requirements of the seismic bearing for seismic prestressing, thereby increasing the application range of the seismic bearing of the bridge.

[0021] Thirdly, the present invention is provided with bridge piers, bases and pouring frames. The bases and pouring frames are arranged at the bottom of the bridge piers. During construction, cement can be poured into the pouring grooves of the pouring frames, thereby further improving the seismic effect of the bridge piers and increasing the seismic performance of the bridge seismic bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a cross-sectional schematic diagram of the installation frame connection structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the elastic rod connection structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the prestressed rope connection structure of the present invention;

[0027] Figure 5 It is an exploded schematic diagram of the mounting frame connection structure of the present invention;

[0028] Figure 6 It is an exploded schematic diagram of the mounting frame connection structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the lower seismic plate connection structure of the present invention;

[0030] Figure 8 It is a schematic diagram of the base connection structure of the present invention.

[0031] Description of reference numerals:

[0032] 1. Bridge pier; 2. Casting frame; 3. Base; 4. Bridge plate; 5. Arc plate; 6. Slide 1; 7. Slide 2; 8. Elastic rod; 9. Mounting frame; 10. Mounting frame; 11. Inner sliding frame; 12. Upper anti-seismic plate; 13. Shock absorber 1; 14. Shock absorber 2; 15. Side connecting plate; 16. Mounting groove; 17. Mounting block; 18. Prestressed rope; 19. Limiting hole; 20. Winding roller; 21. Limiting groove; 22. Nut; 23. Top connecting plate; 24. Bracket 1; 25. Bracket 2; 26. Lower anti-seismic plate; 27. Rotating shaft; 28. Connecting hole; 29. ​​Buffer pad; 30. Casting groove. DETAILED DESCRIPTION

[0033] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention provides a bridge seismic bearing and a construction method thereof through improvement. The technical solution of the present invention is:

[0035] like Figure 1-Figure 8As shown, a bridge seismic bearing comprises a pier 1 and a bridge plate 4, the top outer wall of the pier 1 is fixedly connected with a mounting frame 9, the top inner wall of the mounting frame 9 is slidably connected with an inner sliding frame 11, the top outer wall of the inner sliding frame 11 is fixedly connected with a top connecting plate 23, the bottom outer wall of the bridge plate 4 is fixedly connected with an arc plate 5, the bottom outer wall of the arc plate 5 is provided with a slide groove 16, the arc plate 5 is slidably connected with the inner wall of the slide groove 16, the outer walls on both sides of the bottom end of the arc plate 5 are provided with slide grooves 27, the inner wall of the slide grooves 27 is slidably connected with side connecting plates 15, the outer walls on both sides of the bottom end of the side connecting plates 15 are fixedly connected with elastic rods 8, the top inner wall of the inner sliding frame 11 is fixedly connected with an upper seismic plate 12, the four corners of the bottom outer wall of the upper seismic plate 12 are fixedly connected with brackets 24, the bottom of the mounting frame 9 A lower seismic plate 26 is fixedly connected to the inner wall, and shock absorbers 13 are installed at the four corners of the outer wall at the top of the lower seismic plate 26. Brackets 25 are fixedly connected to the four corners of the inner wall at the bottom of the mounting frame 9. A rotating shaft 27 is rotatably provided on the inner walls of brackets 14 and 25. The outer wall of the rotating shaft 27 is fixedly connected to shock absorber 2 14. One end of the piston rod of shock absorber 13 is fixedly connected to the inner wall at the top of the inner sliding frame 11. The outer walls of both sides of the mounting frame 9 are fixedly connected to mounting frames 10. The bottom inner wall of the mounting frame 10 is rotatably provided with a winding roller 20. A number of mounting grooves 16 are provided on the outer walls of both sides of the bottom of the arc plate 5. The inner walls of the mounting grooves 16 are slidably connected to mounting blocks 17. The outer wall of the bottom end of the mounting block 17 is fixedly connected to a prestressed rope 18, and the prestressed rope 18 is fixedly connected to the outer wall of the winding roller 20.

[0036] Furthermore, the top of the top connecting plate 23 is arranged in an arc shape, the size of the top connecting plate 23 is adapted to the arc plate 5, the outer walls on both sides of the top connecting plate 23 are fixedly connected with buffer pads 29, the slide groove 1 6 and the slide groove 2 7 are connected, and the side connecting plate 15 is adapted to the size of the top connecting plate 23.

[0037] Furthermore, connecting grooves are provided on both sides of the outer walls at the bottom of the installation frame 9, the elastic rod 8 is arranged in an arc shape, and a connecting protrusion is provided on one side of the outer wall at the bottom of the elastic rod 8, and the connecting protrusion is slidably connected to the inner wall of the connecting groove.

[0038] Furthermore, the mounting grooves 16 are distributed in an arc-shaped array, and a plurality of connection holes 28 are opened on the top outer wall of the mounting frame 10 . The connection holes 28 are distributed in a linear array, and the prestressed ropes 18 are slidably connected to the inner walls of the connection holes 28 .

[0039] Furthermore, limiting holes 19 are opened on the outer walls on both sides of the bottom of the mounting frame 10, and a plurality of limiting grooves 21 are opened on the outer walls on both sides of the winding roller 20. The limiting grooves 21 are distributed in a circular array, and the sizes of the limiting grooves 21 are adapted to the limiting holes 19. Nuts 22 are fixedly connected to the outer walls on both sides of the winding roller 20.

[0040] Furthermore, the prestressed rope 18 is made of high-strength polyethylene fiber, the inner sliding frame 11 is slidably connected to the top inner wall of the installation frame 9, and the bottom outer wall of the installation frame 9 is provided with a mounting hole.

[0041] Furthermore, the bottom outer wall of the pier 1 is fixedly connected to the base 3 , the top outer wall of the base 3 is fixedly connected to the pouring frame 2 , and the top outer wall of the pouring frame 2 is provided with a pouring groove 30 .

[0042] A construction method for a bridge seismic bearing comprises the following steps:

[0043] S1: First, the bridge pier 1 and the base 3 are fixed and connected to the ground pile foundation. After the fixing is completed, the installation frame 9 is fixed on the top of the bridge pier 1, and the inner sliding frame 11 is slidably connected to the inner wall of the top of the installation frame 9. The top connecting plate 23 is fixed on the top of the inner sliding frame 11, and the arc plate 5 and the bridge plate 4 are arranged on the top of the top connecting plate 23. The bridge is composed of multiple bridge plates 4 spliced ​​together;

[0044] S2: When strong winds blow over the bridge or the vibration pressure from the outside is too large, the bridge shakes, and the top connecting plate 23 can slide in a small range in the slide groove 16 of the arc plate 5 at the bottom of the bridge plate 4. The internal bridge plate 4 will also press the inner sliding frame 11. The upper anti-seismic plate 12 and the lower anti-seismic plate 26 inside the inner sliding frame 11 and the mounting frame 9 cooperate with the shock absorber 13 and the shock absorber 2 14 to reduce shock. The external elastic rod 8 is connected to the outer wall of the arc plate 5 and the mounting frame 9 through the side connecting plate 15 and the connecting protrusion. The deformation during vibration can reduce the direct impact on the building structure and reduce the stress concentration of the structure.

[0045] S3: The winding rollers 20 and prestressed ropes 18 are arranged on both sides of the installation frame 9. The tightness of the prestressed ropes 18 is adjusted according to the seismic requirements. The prestressed ropes 18 are slidably connected to the installation grooves 16 of the arc-shaped plates 5 through the installation blocks 17, so that the bridge can resist external forces more effectively, thereby improving the overall stability and safety of the bridge;

[0046] S4: The internal and external seismic resistant structures cooperate with the prestressed rope 18 to improve the seismic resistant effect of the bridge seismic bearing. The seismic resistant structures are mostly sliding connections. The direction they are subjected to during earthquake resistance will not cause the structure to fall off. If part of the structure is damaged, the corresponding seismic resistant structure can be pulled out for replacement. The disassembly and assembly operations are simple and the maintenance cost is low. A pouring frame 2 and a base 3 are set at the bottom of the pier 1. When fixing the pier 1, cement can be poured into the pouring groove 30 to further optimize the seismic resistant structure of the pier 1.

[0047] Working principle: During the construction of the bridge seismic bearing, the bridge pier 1 is set on the ground pile foundation, the pier 1 is fixedly connected to the installation frame 9, the inner sliding frame 11 is slidably connected to the inner wall at the top of the installation frame 9, the top connecting plate 23 is fixedly connected to the outer wall at the top of the inner sliding frame 11, the top of the top connecting plate 23 is arranged in an arc shape, and the top connecting plate 23 is slidably connected to the slide groove 6 at the bottom of the arc plate 5. When there is a strong wind or external vibration pressure, the arc plate 5 and the bridge plate 4 will slide on the top connecting plate 23 in a small range. At the same time, the upper seismic plate 12 and the lower seismic plate 26 in the inner sliding frame 11 and the installation frame 9 cooperate with the shock absorber 13 and the shock absorber 2 14 to resist the earthquake of the structure, and the slide groove 2 7 is opened on both sides of the slide groove 6, and The sliding connection is provided with a side connecting plate 15, which limits the top connecting plate 23 and cooperates with the buffer pad 29 to further improve the earthquake resistance. The elastic rod 8 on the side connecting plate 15 is connected to the mounting frame 9. During vibration, the elastic rod 8 can serve as a flexible connection between the structures, allowing a certain relative movement, thereby reducing the stress concentration of the structure and enhancing the earthquake resistance. Winding rollers 20 are arranged on both sides of the mounting frame 9, and the prestressed rope 18 on the winding roller 20 is connected to the mounting block 17 slidingly connected on the arc plate 5, so as to apply prestress to the arc plate 5 to improve the earthquake resistance. When part of the earthquake-resistant structure is damaged, the stability of the bridge plate 4 is ensured by machinery, and the structure can be directly pushed out from the side for disassembly and replacement, thereby reducing the maintenance cost.

[0048] The winding roller 20 is rotatably arranged on the inner wall at the bottom of the mounting frame 10. The nuts 22 on both sides of the winding roller 20 are rotated to control the winding of the prestressed rope 18 and adjust the size of the prestress. The prestressed rope 18 is made of high-strength polyethylene fiber and is arranged outside the bridge as an extracorporeal prestressed reinforcement system. It does not affect the normal use of the bridge. The fixing bolts are inserted into the limiting holes 19 and then connected to the limiting grooves 21 at the corresponding positions on the winding roller 20 to limit them. The center positions of the arc surfaces on the arc plate 5 and the top connecting plate 23 are consistent, ensuring stable sliding, convenient disassembly and assembly, and earthquake resistance.

[0049] Shock absorber 13 is connected to the lower seismic plate 26 and the inner sliding frame 11, and shock absorber 2 14 is connected to the upper seismic plate 12 and the mounting frame 9 through bracket 1 24 and bracket 2 25. During seismic resistance, shock absorber 2 14 can be rotated to adjust the angle in cooperation with the rotating shaft 27 to prevent movement conflict. A base 3 and a pouring frame 2 are arranged at the bottom of the pier 1, and cement can be poured into the pouring groove 30 of the pouring frame 2 during construction, thereby further improving the seismic resistance of the pier 1.

[0050] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A bridge seismic bearing, comprising a bridge pier (1) and a bridge plate (4), characterized in that: The top outer wall of the pier (1) is fixedly connected to a mounting frame (9), the top inner wall of the mounting frame (9) is slidably connected to an inner sliding frame (11), the top outer wall of the inner sliding frame (11) is fixedly connected to a top connecting plate (23), the bottom outer wall of the bridge plate (4) is fixedly connected to an arc plate (5), the bottom outer wall of the arc plate (5) is provided with a slide groove (6), the arc plate (5) is slidably connected to the inner wall of the slide groove (6), and the arc plate (5) The outer walls on both sides of the bottom end are provided with a second slide groove (7), the inner wall of the second slide groove (7) is slidably connected with a side connecting plate (15), the outer walls on both sides of the bottom end of the side connecting plate (15) are fixedly connected with an elastic rod (8), the top inner wall of the inner sliding frame (11) is fixedly connected with an upper earthquake-resistant plate (12), the four corners of the outer wall of the bottom end of the upper earthquake-resistant plate (12) are fixedly connected with a bracket (24), the bottom inner wall of the installation frame (9) is fixedly connected with a lower earthquake-resistant plate ( 26), shock absorber 1 (13) is installed at the four corners of the top outer wall of the lower anti-seismic plate (26), bracket 2 (25) is fixedly connected at the four corners of the bottom inner wall of the installation frame (9), a rotating shaft (27) is rotatably arranged on the inner wall of the bracket 1 (24) and the bracket 2 (25), shock absorber 2 (14) is fixedly connected to the outer wall of the rotating shaft (27), one end of the piston rod of the shock absorber 1 (13) is fixedly connected to the inner wall of the top of the inner sliding frame (11), and the installation frame (9) is fixedly connected to the inner wall of the bottom inner wall of the inner sliding frame (11). The outer walls on both sides of the mounting frame (9) are fixedly connected with mounting frames (10), the inner wall at the bottom of the mounting frames (10) is rotatably provided with a winding roller (20), the outer walls on both sides of the bottom of the arc-shaped plate (5) are provided with a plurality of mounting grooves (16), the inner walls of the mounting grooves (16) are slidably connected with mounting blocks (17), the outer wall at the bottom end of the mounting block (17) is fixedly connected with a prestressed rope (18), and the prestressed rope (18) is fixedly connected to the outer wall of the winding roller (20).

2. The bridge seismic bearing according to claim 1, characterized in that: The top of the top connecting plate (23) is arranged in an arc shape, the size of the top connecting plate (23) is adapted to the size of the arc plate (5), the outer walls on both sides of the top connecting plate (23) are fixedly connected with buffer pads (29), the first slide groove (6) and the second slide groove (7) are connected, and the size of the side connecting plate (15) is adapted to the size of the top connecting plate (23).

3. The bridge seismic bearing according to claim 1, characterized in that: The outer walls on both sides of the bottom of the installation frame (9) are provided with connection grooves, the elastic rod (8) is arranged in an arc shape, and the outer wall on one side of the bottom of the elastic rod (8) is provided with a connection protrusion, and the connection protrusion is slidably connected to the inner wall of the connection groove.

4. The bridge seismic bearing according to claim 1, characterized in that: The mounting grooves (16) are distributed in an arc array, a plurality of connection holes (28) are provided on the top outer wall of the mounting frame (10), the connection holes (28) are distributed in a linear array, and the prestressed ropes (18) are slidably connected to the inner walls of the connection holes (28).

5. The bridge seismic bearing according to claim 4, characterized in that: The outer walls on both sides of the bottom of the mounting frame (10) are provided with limiting holes (19), and the outer walls on both sides of the winding roller (20) are provided with a plurality of limiting grooves (21), the limiting grooves (21) are distributed in a ring array, the sizes of the limiting grooves (21) and the limiting holes (19) are adapted, and the outer walls on both sides of the winding roller (20) are fixedly connected with nuts (22).

6. The bridge seismic bearing according to claim 1, characterized in that: The prestressed rope (18) is made of high-strength polyethylene fiber material, the inner sliding frame (11) is slidably connected to the top inner wall of the installation frame (9), and the bottom outer wall of the installation frame (9) is provided with a mounting hole.

7. The bridge seismic bearing according to claim 1, characterized in that: The bottom outer wall of the pier (1) is fixedly connected to a base (3), the top outer wall of the base (3) is fixedly connected to a pouring frame (2), and the top outer wall of the pouring frame (2) is provided with a pouring groove (30).

8. The construction method of the bridge seismic bearing according to any one of claims 1 to 7, characterized in that: The construction method comprises the following steps: S1: First, the bridge pier (1) and the base (3) are fixed and connected to the ground pile foundation. After the fixing is completed, the installation frame (9) is fixed on the top of the bridge pier (1), and the inner sliding frame (11) is slidably connected to the inner wall of the top of the installation frame (9), and the top connecting plate (23) is fixed on the top of the inner sliding frame (11). The arc plate (5) and the bridge plate (4) are arranged on the top of the top connecting plate (23), and the bridge is composed of a plurality of bridge plates (4) spliced ​​together; S2: When strong winds blow over the bridge or the bridge is subjected to excessive vibration pressure from the outside, the bridge shakes. The top connecting plate (23) can slide in a small range in the slide groove (6) of the curved plate (5) at the bottom of the bridge plate (4). The internal bridge plate (4) also presses the internal sliding frame (11). The upper anti-seismic plate (12) and the lower anti-seismic plate (26) inside the internal sliding frame (11) and the installation frame (9) cooperate with the shock absorber (13) and the shock absorber (14) to reduce shock. The external elastic rod (8) is connected to the outer wall of the curved plate (5) and the installation frame (9) through the side connecting plate (15) and the connecting protrusion. The deformation during vibration can reduce the direct impact on the building structure and reduce the stress concentration of the structure. S3: The winding rollers (20) and prestressed ropes (18) are arranged on both sides of the installation frame (9), and the tightness of the prestressed ropes (18) is adjusted according to the earthquake resistance requirements. The prestressed ropes (18) are slidably connected to the installation grooves (16) of the arc-shaped plates (5) through the installation blocks (17), so that the bridge can resist external forces more effectively, thereby improving the overall stability and safety of the bridge; S4: The internal and external seismic resistant structures cooperate with the prestressed rope (18) to improve the seismic resistant effect of the bridge seismic resistant bearing. The seismic resistant structure is mostly a sliding connection. The direction of the structure during seismic resistance will not cause the structure to fall off. If part of the structure is damaged, the corresponding seismic resistant structure can be pulled out and replaced. The disassembly and assembly operation is simple and the maintenance cost is low. A pouring frame (2) and a base (3) are set at the bottom of the pier (1). When fixing the pier (1), cement can be poured into the pouring groove (30), so as to further optimize the seismic resistant structure of the pier (1).

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