Bridge prefabricated part anti-seismic structure

Abstract

The utility model relates to the field of bridges, in particular to a bridge prefabricated part anti-seismic structure which comprises box girders, a cover beam and connecting assemblies, the ends, in the length direction of the box girders, of the box girders are connected to the upper end of the cover beam, the multiple box girders are distributed in the length direction of the cover beam at intervals, and the connecting assemblies are connected between every two adjacent box girders. The connecting assemblies are connected between the two adjacent box girders, so that the distance between the two adjacent box girders is kept constant, the possibility that the two adjacent box girders get away from each other or get close to each other when subjected to transverse vibration, then wet joint parts are stretched or extruded, and the wet joint parts are damaged is reduced, the anti-seismic performance of a bridge is improved, and the service life of the bridge is prolonged. And the service life of the bridge is prolonged.

Description

Technical Field

[0001] This application relates to the field of bridges, and in particular to an anti-seismic structure for precast bridge components. Background Art

[0002] A bridge generally refers to a structure erected over rivers, lakes, and seas to enable vehicles, pedestrians, etc. to pass smoothly. To adapt to the modern high-speed development of the transportation industry, a bridge is also extended to a building that is erected across mountain streams, poor geological conditions, or to meet other transportation needs to make passage more convenient.

[0003] With the development of construction technology and social economy, the construction field has begun to pursue green, industrialized, and industrialized construction. Prefabricated buildings can precast components in a prefabrication yard with less interference from the surrounding environment. They are precast centrally in a factory or on-site and then transported to the site for assembly, with relatively high work efficiency, and production is safe and convenient.

[0004] Refer to Figure 1 , an existing precast pier 02 is fixedly connected to the upper end of an existing bearing platform 01, an existing precast capping beam 03 is fixedly connected to the upper end of the existing precast pier 02, an existing precast box girder 04 is fixedly connected to the upper end of the existing precast capping beam 03, and an existing wet joint structure 05 is fixedly connected between two adjacent existing precast box girders 04.

[0005] The wet joint structure connects adjacent box girders in a cast-in-place manner. The connection strength of the existing wet joint structure is relatively low. When the bridge is affected by vibration, the wet joint is prone to fracture, affecting the normal use of the bridge, and the seismic performance of the bridge is relatively low. Utility Model Content

[0006] In order to improve the structural strength of the wet joint, improve the seismic performance of the bridge, and extend the service life of the bridge, this application provides an anti-seismic structure for precast bridge components.

[0007] An anti-seismic structure for precast bridge components provided by this application adopts the following technical solution:

[0008] An anti-seismic structure for precast bridge components includes box girders, capping beams, and connection components. One end of the box girder along the length direction of the box girder is connected to the upper end of the capping beam. There are several box girders, and several box girders are spaced apart along the length direction of the capping beam. The connection components are connected between two adjacent box girders.

[0009] By adopting the above technical solution, the connection components are connected between two adjacent box girders, so that the distance between two adjacent box girders remains constant, reducing the possibility that two adjacent box girders move away from or approach each other under transverse vibration, thereby stretching or squeezing the wet joint part and causing damage to the wet joint part, improving the seismic performance of the bridge, and further extending the service life of the bridge.

[0010] Preferably, a number of connecting components are provided between two adjacent box girders, and the number of connecting components are distributed at intervals along the length direction of the box girder.

[0011] By adopting the above technical solution, a number of connecting components are provided between two adjacent box girders, which helps to disperse the stress on a single connecting component, improve the connection stability between two adjacent box girders, reduce the possibility of damage to the connecting components, and improve the seismic performance of the bridge.

[0012] Preferably, one side of the box girder along the direction of the capping beam is connected with a threaded rod, and the other side of the box girder is connected with a connecting rod. The number of the threaded rods and the connecting rods is the same as that of the connecting components and they correspond to each other one by one. The connecting component includes a sleeve. One end of the sleeve is connected to the connecting rod, and the other end of the sleeve is threadedly connected to the threaded rod of the adjacent box girder. A slurry inlet hole is provided on the outer wall of the sleeve, and the slurry inlet hole is communicated with the inner side of the sleeve.

[0013] By adopting the above technical solution, the connecting rod and the threaded rod are respectively connected to both sides of the box girder. During installation, the sleeve is connected to the connecting rod, and the sleeve is rotated to make the sleeve threadedly connected to the threaded rod of the adjacent box girder. After the connection is completed, concrete is poured between two adjacent box girders. The concrete enters the sleeve from the slurry inlet hole to realize the connection between the connecting rod and the threaded rod, and further realize the connection between two adjacent box girders, improving the seismic performance of the bridge.

[0014] Preferably, a retaining ring is coaxially connected to the outer periphery of the end of the connecting rod away from the box girder, and a limiting ring is coaxially connected to the inner wall of the sleeve near the connecting rod end. The limiting ring is used to abut against the retaining ring. A communication groove is provided on the outer periphery of the retaining ring, and the communication groove penetrates through the retaining ring along the axis of the connecting rod.

[0015] By adopting the above technical solution, the limiting ring is used to abut against the retaining ring, reducing the possibility of the sleeve disengaging from the connecting rod during transportation. The retaining ring is provided with a communication groove, which is convenient for the concrete to fill the inside of the sleeve, improving the connection stability between the sleeve and the connecting rod and the threaded rod.

[0016] Preferably, a first chamfer is provided on the inner wall of the sleeve at the end away from the connecting rod, and the first chamfer is used for the end of the threaded rod to abut against.

[0017] By adopting the above technical solution, the first chamfer plays a guiding role in the connection between the threaded rod and the sleeve, facilitating the insertion of the connecting rod into the sleeve and improving the installation efficiency.

[0018] Preferably, it further includes an installation component, which includes an installation base, a fixed base, a buffer block and a first reset member. The fixed base is connected to the upper end of the capping beam. There are several fixed bases, which are divided into two groups. The two groups of fixed bases are symmetrically distributed along the width direction of the capping beam, and the fixed bases in the same group are spaced along the length direction of the capping beam. The installation base is slidably connected to the upper end of the fixed base, and the sliding direction of the installation base is vertical. One end of the box girder along the length direction of the box girder is connected to the upper end of the installation base. The buffer block is located between the installation base and the fixed base, and the first reset member is connected between the installation base and the fixed base. The first reset member makes the installation base tend to move away from the fixed base.

[0019] By adopting the above technical solution, the upper end of the installation base is used for installing two groups of box girders symmetrically distributed on both sides along the width direction of the capping beam, so that the vibration frequencies of the box girders connected to the same installation base in the vertical direction are the same, improving the integrity of the bridge. The buffer block and the first reset member are provided to absorb the vibration of the box girder in the vertical direction, reduce the vibration amplitude of the box girder, and improve the seismic performance of the bridge.

[0020] Preferably, a chute is provided at the upper end of the fixed base, and a sliding column is connected to the lower end of the installation base. The number of sliding columns is the same as and corresponds to the number of fixed bases one by one. The sliding columns are coaxially and slidably embedded in the chute, and the side wall of the sliding column is in contact with the chute wall. The buffer block is embedded in the chute, and the side wall of the buffer block is in contact with the chute wall.

[0021] By adopting the above technical solution, the sliding columns are slidably embedded in the chute, and the outer wall of the sliding column is in contact with the chute wall, which plays a guiding role in the sliding of the installation base. The buffer block is embedded in the chute, reducing the possibility of the buffer block sliding horizontally under extrusion and improving the buffering effect of the buffer block on the sliding column.

[0022] Preferably, an embedding groove is provided at the lower end of the sliding column. There are several embedding grooves, which are circumferentially spaced around the axis of the sliding column. The number of the first reset members is the same as and corresponds to the number of the embedding grooves one by one. The first reset members are embedded in the embedding grooves.

[0023] By adopting the above technical solution, the first reset members are embedded in the embedding grooves, and the embedding grooves play a limiting role in the embedding of the first reset members, reducing the possibility of the first reset members shifting during the installation process and improving the buffering effect of the first reset members on the installation base.

[0024] Preferably, two stoppers are connected to the upper end of the capping beam. The two stoppers are symmetrically distributed along the length direction of the capping beam, and the stoppers are used to abut against the side wall of the box girder.

[0025] By adopting the above technical solution, stop blocks are provided. The two stop blocks are respectively located on both sides of the capping beam in the length direction and are used to abut against the side walls of the box girder, reducing the possibility of the box girder detaching from the capping beam, improving the seismic performance of the bridge, and extending the service life of the bridge.

[0026] Preferably, it further includes buffer pads. A receiving groove is provided on the side of the stop block facing the other stop block. The number of buffer pads is the same as and corresponds one-to-one with the number of receiving grooves. The buffer pads are embedded in the receiving grooves and are used to abut against the side walls of the box girder.

[0027] By adopting the above technical solution, the buffer pads are connected to the stop blocks and abut against the side walls of the box girder, used to absorb the impact force of the box girder sliding along the length direction of the capping beam, reducing the possibility of rigid collision between the box girder and the stop block, which may cause damage to the box girder or the stop block, improving the seismic performance of the bridge, and extending the service life of the bridge.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The connecting components are connected between adjacent two box girders, keeping the distance between adjacent two box girders constant, reducing the possibility that adjacent two box girders move away from or approach each other under lateral vibration, and then stretching or squeezing the wet joint part, resulting in damage to the wet joint part, improving the seismic performance of the bridge, and thus extending the service life of the bridge;

[0030] 2. The connecting rod and the threaded rod are respectively connected to both sides of the box girder. During installation, the sleeve is connected to the connecting rod. By rotating the sleeve, the sleeve is threadedly connected to the threaded rod of the adjacent box girder. After the connection is completed, concrete is poured between the adjacent two box girders. The concrete enters the sleeve from the slurry inlet hole, realizing the connection between the connecting rod and the threaded rod, and then realizing the connection between the adjacent two box girders, improving the seismic performance of the bridge;

[0031] 3. The upper end of the mounting seat is used for installing two groups of box girders symmetrically distributed on both sides along the width direction of the capping beam, making the vibration frequencies of the box girders connected to the same mounting seat the same in the vertical direction, improving the integrity of the bridge. Buffer blocks and first resetting members are provided to absorb the vibration of the box girder in the vertical direction, reducing the vibration amplitude of the box girder, and improving the seismic performance of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of a bridge in the prior art.

[0033] Figure 2 is a schematic structural diagram of the seismic structure of bridge precast components.

[0034] Figure 3 is a partial cross-sectional view of the seismic structure of bridge precast components

[0035] Figure 4 It is an exploded structural schematic diagram of a capping beam and an installation component.

[0036] Figure 5 It is Figure 3 an enlarged view of location A in

[0037] Figure 6 It is a partial sectional view of the seismic structure of a precast bridge component.

[0038] Figure 7 It is Figure 6 an enlarged view of location B in

[0039] Explanation of reference numerals:

[0040] 1, box girder;

[0041] 2, bridge lower structure component; 21, capping beam; 211, stop block; 2111, receiving groove; 22, pile foundation; 23, pile cap; 24, pier column;

[0042] 3, connecting component; 31, sleeve; 311, limiting ring; 3111, annular groove; 312, grouting hole; 313, first chamfer; 32, sealing ring;

[0043] 4, installation component; 41, mounting seat; 411, sliding column; 4111, embedding groove; 412, mounting plate; 42, fixing seat; 421, sliding groove; 43, buffer block; 431, connecting hole; 44, first resetting member;

[0044] 5, buffer pad;

[0045] 6, threaded rod;

[0046] 7, connecting rod; 71, retaining ring; 711, communicating groove;

[0047] 01, existing pile cap; 02, existing precast pier column; 03, existing precast capping beam; 04, existing precast box girder; 05, existing wet joint structure. Detailed implementation manners

[0048] The present application will be further described in detail below with reference to the accompanying drawings.

[0049] Refer to Figure 2, an anti-seismic structure of a precast bridge component disclosed in an embodiment of the present application includes a bridge substructure assembly 2. The bridge substructure assembly 2 includes pile foundations 22, a bearing platform 23, pier columns 24, and a capping beam 21. The pile foundations 22 are fixedly connected to the lower end of the bearing platform 23, the length direction of the pile foundations 22 is vertical, there are several pile foundations 22, the several pile foundations 22 are divided into two groups, the two groups of pile foundations 22 are symmetrically distributed along the width direction of the bearing platform 23, and the pile foundations 22 in the same group are evenly distributed along the length direction of the bearing platform 23. In this embodiment, there are eight pile foundations 22. The lower ends of the pier columns 24 are fixedly connected to the upper end of the bearing platform 23, there are two pier columns 24, and the two pier columns 24 are symmetrically distributed along the length direction of the bearing platform 23. The capping beam 21 is fixedly connected to the upper ends of the two pier columns 24, and the length direction of the capping beam 21 is parallel to the length direction of the bearing platform 23. In this embodiment, there are several bridge substructure assemblies 2, and the several bridge substructure assemblies 2 are evenly distributed along the width direction of the bearing platform 23.

[0050] Referring to Figure 2 and Figure 3 , an anti-seismic structure of a precast bridge component further includes a buffer pad 5. A stop block 211 is fixedly connected to the upper end of the capping beam 21, there are two stop blocks 211, and the two stop blocks 211 are symmetrically distributed along the length direction of the capping beam 21. The surface of one stop block 211 away from the other stop block 211 is flush with one side surface of the capping beam 21 along the length direction of the capping beam 21, and the two side surfaces of the stop block 211 along the width direction of the capping beam 21 are flush with the two side surfaces of the capping beam 21 along the width direction of the capping beam 21. A receiving groove 2111 is provided on the surface of the stop block 211 close to the other stop block 211. The number of buffer pads 5 is the same as the number of receiving grooves 2111 and they correspond one by one. The buffer pads 5 are embedded in the receiving grooves 2111. One end of the buffer pad 5 is fixedly connected to the bottom of the receiving groove 2111, and the other end of the buffer pad 5 extends out of the receiving groove 2111. In this embodiment, the buffer pad 5 is made of rubber.

[0051] An anti-seismic structure of a precast bridge component further includes an installation assembly 4. The number of installation assemblies 4 is the same as the number of bridge substructure assemblies 2 and they correspond one by one. The installation assembly 4 is located between the two stop blocks 211.

[0052] Referring to Figure 4 and Figure 5 , the installation assembly 4 includes a fixed seat 42 and a buffer block 43. The lower end of the fixed seat 42 is fixedly connected to the upper end of the capping beam 21, and a sliding groove 421 is coaxially provided at the upper end of the fixed seat 42. There are several fixed seats 42, the several fixed seats 42 are divided into two groups, the two groups of fixed seats 42 are symmetrically distributed along the width direction of the capping beam 21, and the fixed seats 42 in the same group are evenly distributed along the length direction of the capping beam 21. In this embodiment, there are ten fixed seats 42. The number of buffer blocks 43 is the same as the number of fixed seats 42 and they correspond one by one. The buffer blocks 43 are embedded in the sliding grooves 421. The lower ends of the buffer blocks 43 are fixedly connected to the bottom of the sliding grooves 421, and the side walls of the buffer blocks 43 are in contact with the walls of the sliding grooves 421.

[0053] The mounting assembly 4 further includes a mounting base 41. The mounting base 41 includes a mounting plate 412 and sliding columns 411. The sliding columns 411 are fixedly connected to the lower end of the mounting plate 412. The length direction of the sliding columns 411 is vertical. The number of the sliding columns 411 is the same as and corresponds one by one to the number of the fixed seats 42. The sliding columns 411 are coaxially and slidably embedded in the sliding grooves 421. The side walls of the sliding columns 411 are in contact with the groove walls of the sliding grooves 421. The lower ends of the sliding columns 411 abut against one end of the buffer block 43 away from the bottom of the sliding groove 421.

[0054] The mounting assembly 4 further includes a first reset member 44. The first reset member 44 is connected between the sliding column 411 and the fixed seat 42. The first reset member 44 makes the mounting plate 412 tend to move away from the fixed seat 42. In this embodiment, the first reset member 44 is a spring. An embedding groove 4111 is provided at the lower end of the sliding column 411. A connection hole 431 is provided in the buffer block 43. The connection hole 431 penetrates through the buffer block 43 along the axial direction of the sliding column 411. One end of the first reset member 44 is connected to the bottom of the embedding groove 4111, and the other end of the first reset member 44 passes through the connection hole 431 and is then connected to the bottom of the sliding groove 421. There are several embedding grooves 4111, and the several embedding grooves 4111 are evenly distributed circumferentially around the axis of the sliding column 411. In this embodiment, four embedding grooves 4111 are provided. The number of the connection holes 431 is the same as and corresponds one by one to the number of the embedding grooves 4111.

[0055] Refer to Figure 2 and Figure 5 A seismic structure for bridge precast members further includes a box girder 1. A plurality of box girders 1 are provided between two adjacent bridge substructure components 2, and the plurality of box girders 1 are evenly distributed along the length direction of the capping beam 21. One end of the box girder 1 along the length direction of the box girder 1 is fixedly connected to the upper end of the mounting plate 412, and the side walls of the box girders 1 on both sides along the length direction of the capping beam 21 are in contact with the buffer pads 5.

[0056] Refer to Figure 2 and Figure 6 A seismic structure for bridge precast members further includes a connecting assembly 3. A plurality of connecting assemblies 3 are provided between two adjacent box girders 1, and the plurality of connecting assemblies 3 are evenly distributed along the length direction of the box girder 1. In this embodiment, five connecting assemblies 3 are provided between two adjacent box girders 1. A threaded rod 6 is fixedly connected to one side of the box girder 1 along the length direction of the capping beam 21, and a connecting rod 7 is fixedly connected to the other side of the box girder 1. The number of the connecting rods 7 and the threaded rods 6 is the same as and corresponds one by one to the number of the connecting assemblies 3.

[0057] Refer to Figure 6 and Figure 7, the connecting component 3 includes a sleeve 31 and a sealing ring 32. One end of the sleeve 31 is coaxially connected to the outer periphery of the connecting rod 7, and the other end of the sleeve 31 is threadedly connected to the threaded rod 6 of the adjacent box girder 1. A first chamfer 313 is provided at the inner wall of the end of the sleeve 31 away from the connecting rod 7, and the first chamfer 313 is used for the end of the threaded rod 6 away from the box girder 1 to abut. A retaining ring 71 is coaxially and fixedly connected to the outer periphery of the end of the connecting rod 7 away from the box girder 1, and the retaining ring 71 fits against the inner wall of the sleeve 31. A communication groove 711 is provided at the outer wall of the retaining ring 71, and the communication groove 711 penetrates the retaining ring 71 along the axial direction of the connecting rod 7. A limiting ring 311 is coaxially and fixedly connected to the inner wall of the end of the sleeve 31 close to the connecting rod 7, the inner wall of the limiting ring 311 fits against the outer wall of the connecting rod 7, and the limiting ring 311 is used to abut against the retaining ring 71. A ring groove 3111 is provided at the inner wall of the limiting ring 311, the sealing ring 32 is embedded in the ring groove 3111, and the inner wall of the sealing ring 32 abuts tightly against the outer wall of the connecting rod 7. A slurry inlet hole 312 is provided at the outer wall of the sleeve 31, and the slurry inlet hole 312 is communicated with the inside of the sleeve 31. A plurality of slurry inlet holes 312 are provided, and the plurality of slurry inlet holes 312 are evenly distributed circumferentially around the axis of the sleeve 31. In this embodiment, three slurry inlet holes 312 are provided.

[0058] The implementation principle of the seismic structure of a precast bridge component in an embodiment of the present application is as follows: The pier column 24 is fixedly connected to the upper end of the bearing platform 23, the capping beam 21 is fixedly connected to the upper end of the pier column 24. The buffer pad 5 is embedded in the receiving groove 2111, the fixed seat 42 is fixedly connected to the upper end of the capping beam 21, the buffer block 43 is embedded in the ring groove 3111, the first reset member 44 is embedded in the connection hole 431, the sliding column 411 of the embedding groove 4111 is embedded in the sliding groove 421, the embedding groove 4111 is aligned with the connection hole 431, so that the first reset member 44 is embedded in the embedding groove 4111.

[0059] The box girder 1 is fixedly connected to the upper end of the mounting plate 412. The box girders 1 are evenly distributed along the length direction of the capping beam 21, and the side walls of the two box girders 1 on both sides abut against the buffer pad 5. Slide the sleeve 31 so that the first chamfer 313 abuts against the threaded rod 6 of the adjacent box girder 1, and rotate the sleeve 31 so that the sleeve 31 is threadedly connected to the threaded rod 6. When the limiting ring 311 abuts against the retaining ring 71, stop rotating. Overlap the formwork, pour concrete between two adjacent box girders 1, and the concrete enters the inside of the sleeve 31 from the slurry inlet hole 312 and fills the inside of the sleeve 31 to realize the connection between two adjacent box girders 1.

[0060] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An anti-seismic structure for precast bridge components, characterized in that: It includes a box girder (1), a capping beam (21) and a connecting component (3); one end of the box girder (1) along the length direction of the box girder (1) is connected to the upper end of the capping beam (21); there are a plurality of the box girders (1); the plurality of box girders (1) are spaced apart along the length direction of the capping beam (21); the connecting component (3) is connected between two adjacent box girders (1).

2. The seismic structure of the precast bridge component according to claim 1, characterized in that: There are a plurality of connecting components (3) between two adjacent box girders (1); the plurality of connecting components (3) are spaced apart along the length direction of the box girder (1).

3. The aseismic structure of the precast bridge component according to claim 2, characterized in that: One side of the box girder (1) along the direction of the capping beam (21) is connected with a threaded rod (6); the other side of the box girder (1) is connected with a connecting rod (7); the number of the threaded rods (6) and the connecting rods (7) is the same as the number of the connecting components (3) and they correspond one by one; the connecting component (3) includes a sleeve (31); one end of the sleeve (31) is connected to the connecting rod (7); the other end of the sleeve (31) is threadedly connected to the threaded rod (6) of the adjacent box girder (1); a slurry inlet hole (312) is arranged on the outer wall of the sleeve (31); the slurry inlet hole (312) is communicated with the inner side of the sleeve (31).

4. The aseismic structure of the precast bridge component according to claim 3, characterized in that: A retaining ring (71) is coaxially connected to the outer periphery of the end of the connecting rod (7) far away from the box girder (1); a limiting ring (311) is coaxially connected to the inner wall of the sleeve (31) near the end of the connecting rod (7); the limiting ring (311) is used for abutting against the retaining ring (71); a communicating groove (711) is arranged on the outer periphery of the retaining ring (71); the communicating groove (711) penetrates through the retaining ring (71) along the axis of the connecting rod (7).

5. The aseismic structure of the precast bridge component according to claim 3, characterized in that: A first chamfer (313) is arranged on the inner wall of the sleeve (31) at the end far away from the connecting rod (7); the first chamfer (313) is used for the end of the threaded rod (6) to abut against.

6. The aseismic structure of the precast bridge component according to claim 1, wherein: It further includes an installation component (4); the installation component (4) includes an installation seat (41), a fixed seat (42), a buffer block (43) and a first resetting member (44); the fixed seat (42) is connected to the upper end of the capping beam (21); there are a plurality of the fixed seats (42); the plurality of fixed seats (42) are divided into two groups; the two groups of fixed seats (42) are symmetrically distributed along the width direction of the capping beam (21); the fixed seats (42) in the same group are spaced apart along the length direction of the capping beam (21); the installation seat (41) is slidably connected to the upper end of the fixed seat (42); the sliding direction of the installation seat (41) is vertical; one end of the box girder (1) along the length direction of the box girder (1) is connected to the upper end of the installation seat (41); the buffer block (43) is located between the installation seat (41) and the fixed seat (42); the first resetting member (44) is connected between the installation seat (41) and the fixed seat (42); the first resetting member (44) makes the installation seat (41) have a tendency to move away from the fixed seat (42).

7. The aseismic structure of the precast bridge component according to claim 6, characterized in that: The upper end of the fixed seat (42) is provided with a sliding groove (421); the lower end of the mounting seat (41) is connected with a sliding column (411); the number of the sliding columns (411) is the same as that of the fixed seats (42) and they correspond one by one; the sliding columns (411) are coaxially and slidably embedded in the sliding grooves (421); the side wall of the sliding column (411) is in contact with the groove wall of the sliding groove (421); the buffer block (43) is embedded in the sliding groove (421); the side wall of the buffer block (43) is in contact with the groove wall of the sliding groove (421).

8. The aseismic structure of the precast bridge component according to claim 7, characterized in that: The lower end of the sliding column (411) is provided with a plurality of embedding grooves (4111); the plurality of embedding grooves (4111) are circumferentially and spacedly distributed around the axis of the sliding column (411); the number of the first resetting members (44) is the same as that of the embedding grooves (4111) and they correspond one by one; the first resetting members (44) are embedded in the embedding grooves (4111).

9. The aseismic structure of the precast bridge component according to claim 1, characterized in that: The upper end of the capping beam (21) is connected with two retaining blocks (211); the two retaining blocks (211) are symmetrically distributed along the length direction of the capping beam (21); the retaining blocks (211) are used for abutting against the side wall of the box girder (1).

10. The aseismic structure of the precast bridge component according to claim 9, characterized in that: It further includes a buffer pad (5); one side of the retaining block (211) facing the other retaining block (211) is provided with a receiving groove (2111); the number of the buffer pads (5) is the same as that of the receiving grooves (2111) and they correspond one by one; the buffer pads (5) are embedded in the receiving grooves (2111); the buffer pads (5) are used for abutting against the side wall of the box girder (1).

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