CN217810491U

CN217810491U - Bridge expansion joint

Info

Publication number: CN217810491U
Application number: CN202221508249.XU
Authority: CN
Inventors: 梁天宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-11-15
Anticipated expiration: 2032-05-09

Abstract

The utility model relates to a bridge expansion joint, characterized by bridge expansion joint comprises left unit and right unit, left side unit and right unit are by concrete placement at the both ends of case roof beam, connect through the bridging board, left side unit and right unit contain the bottom plate, the bridging board, expansion plate and template, the bridging board head is fixed on the bottom plate of one side, the afterbody is taken on the bottom plate of one side in addition and sliding connection with it, the expansion plate is the telescopic component who comprises polylith riser alternately together, connect at the bridging board afterbody, absorb all deformations of bridge expansion joint, the template can directly pour the concrete with the case roof beam end is sealed, the bridging board comprises the channel-section steel, spread asphalt concrete and flatten on the bridge expansion joint after the concrete sclerosis, be full of asphalt concrete in the channel-section steel, except the expansion plate, all the rest are all hidden under the road surface, the utility model discloses a bridge expansion joint characteristics is, convenient and fast, intensity is high, the vehicle is smooth-going through silence travelling comfort.

Description

Bridge expansion joint

Technical Field

Background

The expansion joint of the bridge is a member which can freely expand and contract in two directions vertical to and parallel to the axis of the bridge, is firm and reliable, and is smooth and free of jumping and noise when a vehicle runs, and when the bridge is used, the expansion joint device is a member bearing the maximum power load, and the bridge is subjected to a large impact force due to small unevenness of the bridge floor, so that the expansion joint is greatly damaged, and bridge floor jumping can be generated after the expansion joint device is damaged to a certain extent, so that the structural safety of the bridge is influenced.

Objects and advantages of the utility model

SUMMERY OF THE UTILITY MODEL

The utility model relates to a bridge expansion joint (see figure 1, figure 7), the purpose is to solve the problem that the existing bridge expansion joint is not flat and noisy, characterized by that the bridge expansion joint assembly is composed of left unit (40) and right unit (41), left unit (40) and right unit (41) are two movable components of the bridge expansion joint assembly, relative crossing combination can be stretched out and drawn back and slide, left unit (40) is composed of bridging board (1), expansion plate (3) and left chassis (27), right unit (41) is composed of bridging board (1), expansion plate (3) and right chassis (28), left chassis (27) and right chassis (28) are respectively composed of bottom plate (2), C shaped steel (4), template (6), reinforcing mesh (7), anchor bolt (8) and reinforcing beam (10) (see figure 3, figure 5), all components are welded into a whole, the structure of left chassis (27) and right chassis (28) is nearly completely symmetrical, the difference lies in that the mounting hole on two bottom plates (2) and the position of anchor bolt (8) are shown in figure 3, the left chassis (27) and right chassis (28) are composed of a plurality of bridge expansion joint plate (1), the bridge expansion joint plate (27) and left chassis (28) are arranged alternately, the bridge expansion joint plate (1) and bridge expansion joint plate (28) are arranged on the left chassis (1), the width of left chassis (27) is arranged on the left chassis (3), the right unit (41) is assembled on a right chassis (28) by a plurality of bridging plates (1) and expansion plates (3) in an alternative arrangement way (see figure 6), the bridging plates (1) stride across a gap between the left chassis (27) and the right chassis (28) to connect the left chassis (27) and the right chassis (28), one side of the head part of the bridging plates (1) is fixed on the bottom plate (2) by a plurality of anchor bolts (8), one side of the tail part of the bridging plates (1) is lapped on the bottom plate (2) at the other side, the tail part of the bridging plates (1) is provided with expansion holes (21), the ladder bolts (11) penetrate through the expansion holes (21) to connect the bridging plates (1) on the bottom plate (2) to be capable of sliding, the expansion plates (3) are positioned at two ends of the bridge expansion joint assembly and connected with the tail part of the bridging plate (1), the width of the expansion plates (3) is the same as that of the bridging plate (1) and can be expanded and deformed, the expansion plates (3) absorb the deformation of the bridge expansion joint assembly, during construction, a groove is firstly formed in the road surface, a plurality of anchoring reinforcing steel bars (9) are arranged at the groove bottom, the bridge expansion joint assembly is hung on the groove by a cross beam, the lower part of the bridge expansion joint assembly is suspended, a plurality of groups of bridge expansion joint assemblies are spliced into a straight line along the grooving direction and are connected with a pull rod (12) through a connecting block (29) (see figure 14), the elevation is adjusted to enable the upper surface to be parallel and level with the road surface, and the template (6) is attached to the side end surface of the box girder, if the gap is too large, a steel wire is tied on a steel wire hole (25) of a template (6), the other end of the steel wire is tied on an anchoring steel bar (9), the steel wire is tensioned, the template (6) is tightly attached to the side end face of a box girder, concrete is directly poured in the open groove, the height of the concrete is not more than that of a bottom plate (2), after the concrete is hardened, a cross beam is removed, the redundant part of a lengthened anchoring bolt (8) is cut off, the template (6) is permanently kept on the bridge expansion joint and is not removed, then a protecting cover (45) is inserted on each expansion plate (3) to prevent stone aggregate from falling into the gap of the expansion plate (3) to influence the expansion function, then cast-in-situ asphalt concrete is spread on the open groove and the bridge plate (1), the asphalt concrete on the protecting cover (45) is manually scraped off, and then the asphalt concrete is flattened, the newly paved asphalt concrete is flush with the original road surface, after the asphalt concrete is hardened, the protecting cover (45) is removed, only the vertical edge of the bridge expansion joint assembly (1) and the expansion plate (3) are exposed outside the road surface, the rest parts are all hidden under the asphalt concrete road surface, the vehicle is silent and does not jump when the vehicle passes, the bridge expansion joint assembly is a whole welding component from top to bottom, and is coagulated with the concrete into a firm whole, the whole welding is poured once, the strength is high, the construction is convenient, the asphalt concrete is paved on the bridge expansion joint assembly, the asphalt concrete has elasticity, the vibration when the vehicle passes can be buffered, the impact force and the vibration of the concrete of the foundation layer are lightened, and the durability of the bridge expansion joint assembly is improved, asphalt concrete is paved on the bridge expansion joint assembly, the hardness of the asphalt concrete is consistent with that of the road surface, when a vehicle passes through the asphalt concrete, no slapping noise is generated, when the vehicle passes through the asphalt concrete, no vehicle jumping occurs, and after the asphalt concrete is hardened, a water stop strip (5) is assembled in the C-shaped steel (4), so that the construction is completely finished.

The left chassis (27) comprises a bottom plate (2), C-shaped steel (4), a template (6), a reinforcing mesh (7), anchoring bolts (8) and reinforcing beams (10), all components are welded together, the bottom plate (2) is a rectangular flat plate and is an assembly platform for all parts of a bridge expansion joint, the reinforcing beams (10) and the C-shaped steel (4) are welded below the bottom plate (2) to improve the strength of the bottom plate (2) and reduce deformation, the reinforcing beams (10) and the C-shaped steel (4) are as long as the bottom plate (2), the C-shaped steel (4) is welded with the side edges of the bottom plate (2) in a flush mode, a plurality of transverse reinforcing steel bars and longitudinal reinforcing steel bars are welded into the reinforcing mesh (7), the template (6) is a thin steel plate with the same length as the bottom plate (2), the template (6) is vertical to the bottom plate (2), the reinforcing ends of the reinforcing mesh (7) are abutted against the plane of the template (6) and welded together, the upper end of the template (6) is welded with the C-shaped steel (4), mounting holes are arranged on the bottom plate (2), a plurality of rows of the anchoring bolts (8) and the lower end faces of the reinforcing steel bar mesh (6) are welded together, a plurality of the reinforcing steel bar boxes (6) and a plurality of the bridge guide angle iron (50), the steel bar reinforced type steel bar reinforced floor is convenient to assemble in a guiding mode, a row of threaded holes (23) are formed in the bottom plate (2) or a row of welding nuts (39) are welded below the bottom plate (2) and used for assembling stepped bolts (11), and the right chassis (28) comprises the bottom plate (2), C-shaped steel (4), a template (6), a steel bar net (7), an anchoring bolt (8) and a reinforcing beam (10) and is identical to the left chassis (27) in structure.

The bridge plate (1) is composed of channel steel (15) (see figure 8), the lower surface of the channel steel (15) is a plane and is assembled with the bottom plate (2), the opening of the channel steel (15) faces upwards, a plurality of partition plates (16) are welded in the channel steel (15) for strengthening, a row of anchor bolt holes (19) are formed in the bottom surface of the channel steel (15), anchor bolts (8) penetrate through the anchor bolt holes (19) to screw nuts to fix the bridge plate (1) on the bottom plate (2), telescopic holes (21) are formed in the bottom surface of the channel steel (15), the telescopic holes (21) are long-strip-shaped through holes, the step bolts (11) penetrate through the telescopic holes (21) to connect the bridge plate (1) to the bottom plate (2), step round tables (44) are arranged on the step bolts (11) and are matched with the spring gaskets (42) and the flat gaskets (43), the step round tables (44) of the step bolts (11) penetrate through the telescopic holes (21), the lower end surfaces of the step round tables (44) abut against the upper surface of the bottom plate (2), the round tables (44) have a limiting function, the height of the steps is larger than that of the flat gaskets (44) of the spring gaskets (43), the other step bolts (11) are connected with the spring gaskets (11), and the thickness of the spring gaskets (11), and the other round tables (11) is larger than that of the spring gaskets (11), and the spring gaskets (11) and the round tables (11) is tightly connected with the spring gaskets (11), and the spring gaskets (11), the periphery of the telescopic hole (21) is provided with a threaded hole (23), the upper cover (13) is assembled on the telescopic hole (21) to block asphalt concrete, the asphalt concrete does not influence the telescopic sliding of the bridge plate (1), a circular hole (22) is formed in the partition plate (16) at the tail part of the bridge plate (1), the bridge plate (1) is connected with the telescopic plate (3) through bolts, a pull rod hole (17) and a bolt hole (18) are formed in the vertical edge of a channel steel (15) at the head part of the bridge plate (1), the bridge plates (1) and the telescopic plate (3) are assembled on the bottom plate (2) in parallel arrangement, the pull rod (12) and the bolt (35) penetrate through the pull rod hole (17) and the bolt hole (18) in the bridge plate (1), the telescopic plate (3) is connected with the adjacent bridge plate (1), a plurality of plug welding holes (20) are formed in the bottom surface of the channel steel (15), the plug welding holes (20) are long waist-shaped through holes, the bridge plate (1) and the bottom plate (2) are welded together through welding holes (20), and the plug welding holes (2) and the reinforcing plug welding holes are additionally formed in the inner wall.

The expansion plate (3) is composed of a fixed block (24) and a sliding block (26) (see figure 13), the fixed block (24) and the sliding block (26) are relatively crossed and can slide with each other, the fixed block (24) is formed by stacking a plurality of fixed vertical plates (30) and spacing blocks (32) at intervals, the fixed vertical plates (30) and the spacing blocks (32) are rectangular steel plates with certain thickness, the height of the fixed vertical plates is the same as that of channel steel (15), small holes (37) and large holes (38) are formed in the upper surfaces of the fixed vertical plates, bolt holes (18) are formed in the fixed vertical plates (30), pins (33) penetrate through the small holes (37) to connect the plurality of fixed vertical plates (30) and the spacing blocks (32) to form the fixed block (24), the sliding block (26) is formed by stacking a plurality of sliding vertical plates (31) and the spacing blocks (32) at intervals, the sliding vertical plates (31) are rectangular steel plates with certain thickness, the thickness and the height of the fixed vertical plates (30) and the spacing blocks (32) are the same as those of the fixed vertical plates (30) and the spacing blocks (31), the sliding blocks (38), the large holes (38) and the expansion holes (21) are formed in the sliding blocks (34), the sliding blocks (34) penetrate through the connecting rods (34), the fixing block (24) and the sliding block (26) are relatively crossed together, a bolt (35) is inserted into a bolt hole (18) and a telescopic hole (21), the middle of the telescopic plate (3) is connected in series on the bridging plates (1) at two sides by the bolt (35) to avoid the telescopic plate (3) from tilting from the middle, one end of the fixing block (24) of the telescopic plate (3) is connected to the head of the adjacent bridging plate (1) through a pull rod (12), one end of the sliding block (26) of the telescopic plate (3) is connected to the tail of the bridging plate (1) at the other side through a bolt, the deformation of the bridge expansion joint assembly is absorbed by the telescopic plate (3), the lower surface of the telescopic plate (3) is abutted to the bottom plate (2) to bear the pressure when a vehicle passes through, when the telescopic plate (3) is assembled, a gasket (36) is respectively assembled at two sides of the fixing block (24), the pull rod (12) passes through the plurality of bridging plates (1), the gasket (36) and the telescopic plate (3), the gasket (12) and the telescopic plate (3), locking nuts are used at two ends of the pull rod (12), a plurality of the groups of the bridging plates (1), the gasket (36) and the gasket (36) are connected to ensure that the sliding block (3) and the sliding plate (3) can still can clamp the sliding block (26) to keep enough noise when the sliding plate (3) is loosened, and the sliding block (26) to avoid the sliding plate (3), and the sliding block (3) to clamp the sliding plate (26) to clamp the sliding block, and the sliding block (3) to avoid the sliding block, and the sliding block (3), dustproof adhesive tape is stuffed in the gap of expansion plate (3), avoids later stage in-use dust and sand to fall into the gap and influence the free flexible of expansion plate (3).

Drawings

Fig. 1 is a structural schematic diagram of a bridge expansion joint, a left unit (40) and a right unit (41) are poured at two ends of a box girder and are connected through a bridge plate (1), the box girder can stretch and slide relatively, the bridge plate (1) is connected with a telescopic plate (3), and asphalt concrete is spread on the bridge plate (1).

Fig. 2 is a structural view of the formwork (6) and the mesh reinforcement (7), and the formwork (6) and the mesh reinforcement (7) are welded together.

Fig. 3 is a structural view of the left chassis (27), which comprises a bottom plate (2), C-shaped steel (4), a template (6), a reinforcing mesh (7), an anchor bolt (8) and a reinforcing beam (10), all of which are welded into a whole.

Fig. 4 is a structural view of the left unit (40), and the left unit (40) is composed of a bridge plate (1), a telescopic plate (3), and a left chassis (27).

Fig. 5 is a structural view of the right chassis (28) comprising a bottom plate (2), C-section steel (4), a formwork (6), a reinforcing mesh (7), anchor bolts (8) and a reinforcing beam (10), all of which are welded as a whole.

Fig. 6 is a structural view of the right unit (41), and the right unit (41) is composed of a bridge plate (1), a telescopic plate (3), and a right chassis (28).

Fig. 7 is a structural view of a bridge expansion joint assembly, which is composed of a left unit (40) and a right unit (41), wherein a bridging plate (1) spans a gap between the left unit and the right unit, the tail part of the bridging plate (1) is connected to the bottom plate (2) on the other side through a stepped bolt (11), and the left unit (40) and the right unit (41) are connected and can slide in a telescopic way.

Fig. 8 is a structural view of the bridge plate (1), which is composed of channel steel (15), wherein a plurality of partition plates (16) are welded in the channel steel (15), an anchoring bolt hole (19), a telescopic hole (21) and a plug welding hole (20) are arranged on the bottom surface, a pull rod hole (17) and a plug pin hole (18) are arranged on a vertical edge, the telescopic hole (21) is a long strip-shaped through hole, and a threaded hole (23) is arranged beside the telescopic hole.

Fig. 9 is a plan view of the bridge plate (1), showing the structure of the partition plate (16) on the channel steel (15), and the bridge plate (1) is assembled on both sides of the left unit (40) and the right unit (41) without welding the partition plate (16) at the head of the bridge plate (1) and assembling the pull rod (12) in a way to avoid interference.

Fig. 10 is a plan view of a bridge plate (1) in which a spacer (16) is welded to the head of the bridge plate (1) for reinforcement, and the bridge plate (1) is assembled on the inner side of a left unit (40) and a right unit (41).

FIG. 11 is a schematic diagram of the construction of a bridge expansion joint, wherein the bridge expansion joint assembly is connected to a cross beam through an elongated anchor bolt (8), the cross beam suspends the bridge expansion joint assembly on a slot, the lower part of the bridge expansion joint assembly is suspended, and the end face of a box girder is sealed by a template (6).

Fig. 12 is a schematic diagram of the construction of the bridge expansion joint, the end face of the box girder is sealed by the template (6), concrete can be directly poured, and the template does not need to be paved independently.

Fig. 13 is a schematic structural diagram of the expansion plate (3), which is composed of a fixed block (24) and a sliding block (26) (see fig. 13), wherein the fixed block (24) and the sliding block (26) are relatively crossed and can slide with each other.

Fig. 14 is a top view of the bridge expansion joint, the pull rod (12) and the plug pin (35) are inserted into the next set of bridge expansion joint unit, and are locked by the nut of the pull rod (12) and then fixed by the connecting block (29), and the guide angle iron (50) is clamped with the C-shaped steel (4) of the next set of bridge expansion joint to play a role in positioning and guiding.

Fig. 15 is a welded view of the chassis, where all the components of the base plate (2), C-section steel (4), formwork (6), reinforcing mesh (7), anchor bolts (8) and reinforcing beam (10) are welded as a whole.

Fig. 16 is a structural diagram of a stepped bolt (11), a stepped round table (44) is arranged at the lower part of a nut of the stepped bolt (11) to play a limiting role, the stepped bolt is matched with a spring gasket (42) and a flat gasket (43) for use, and after the stepped bolt (11) is screwed, a bridging plate (1) is pressed on a bottom plate (2) by the elastic force of the spring gasket (42) and can slide in a front-back telescopic mode.

Fig. 17 is a structural view of the protective cover (45), the protective cover (45) is a rectangular thin plate which is slightly larger than the expansion plate (3) in size, four screws (47) are assembled on the protective cover, and the screws (47) are screwed in the gaps of the expansion plate (3) to play a role in protection and prevent stones from being plugged into the gaps.

Fig. 18 is a construction drawing of a bridge expansion joint, wherein a protective cover (45) is assembled on each expansion plate (3) to prevent stone aggregate of asphalt concrete from being plugged into a gap to cause the expansion plate (3) to be blocked, and the protective cover (45) is detached after construction is completed.

Detailed Description

Assembling the bridging plate and the telescopic plate: after the left chassis and the right chassis are welded, firstly, the left chassis and the right chassis are placed on a special tool to be fixed, a certain gap is reserved between the left chassis and the right chassis, secondly, bridging plates are assembled from one side of the left chassis and the right chassis to the other side one by one, anchor bolt holes in the bottom surfaces of the bridging plates are assembled with anchor bolts, nuts are screwed, stepped bolts are assembled in telescopic holes in the tail parts of the bridging plates, the tail parts of the bridging plates are connected with the upper telescopic plates through bolts, thus the bridging plates and the telescopic plates are assembled one by one, thirdly, pull rods are inserted into pull rod holes in the head parts of the bridging plates, gaskets are placed at two ends of each telescopic plate, the pull rods penetrate through each group of bridging plates, gaskets and telescopic plates, nuts are screwed at two ends of the pull rods, and bolts are inserted into bolt holes, a bolt penetrates through each group of bridging plates and telescopic plates to connect all the bridging plates and the telescopic plates, a fourth step is that a tool clamps each group of bridging plates from four directions of front, back, left and right to enable the bridging plates to be parallel to the bottom plates of the left chassis and the right chassis, a fifth step is that nuts on each anchoring bolt and nuts at two ends of the pull rod are screwed, the stepped bolts are still in a pre-screwing state and do not need to be screwed, and sixthly, welding in each plug welding hole in the bottom surface of the bridging plate to firmly weld the bridging plate and the bottom plate together, removing the expansion joint assembly from the tool, cleaning welding slag, spraying antirust paint, and eighthly, assembling a dustproof adhesive tape in the gap of the expansion plate, so that all processes of a factory are finished, and delivery is waited.

And (3) construction process of the expansion joint: the method comprises the first step of hoisting expansion joints to grooves, splicing one by one, positioning by using guide angle iron during splicing, the second step of screwing down a nut on one side of a pull rod, penetrating the pull rod and a bolt into a foremost bridge plate of a next group of expansion joints, then screwing down the nut, the third step of connecting two adjacent groups of expansion joint units by using connecting blocks, the fourth step of adjusting a gap between a left unit and a right unit in a bridge expansion joint to a designed distance, then screwing down a step nut, assembling an upper cover on each step nut, the fifth step of inspecting the gap between a template and a box girder end face, tying a steel wire on the template to be tensioned if the gap is overlarge, the sixth step of measuring the elevation of the expansion joint assembly and the road surface, adjusting the elevation to be leveled to make the expansion joint assembly completely level with the road surface, the seventh step of pouring concrete at the bottom of the grooves, pouring quick concrete at the bottom of the expansion joints if the bridge expansion joints are maintained, the maximum height of the concrete is level with a bottom plate, the eighth step of assembling protective covers on each expansion joint plate, assembling the protective covers on the grooves, paving the grooves by manually, paving the asphalt on the expansion joints, and tamping the asphalt on-site.

Claims

1. A bridge expansion joint is characterized in that a bridge expansion joint assembly consists of a left unit (40) and a right unit (41), the left unit (40) and the right unit (41) are two movable components of the bridge expansion joint assembly and are combined together in a relatively crossed manner to be capable of sliding in a telescopic manner, the left unit (40) consists of a bridge plate (1), an expansion plate (3) and a left chassis (27), the right unit (41) consists of the bridge plate (1), the expansion plate (3) and a right chassis (28), the left chassis (27) and the right chassis (28) respectively consist of a bottom plate (2), C-shaped steel (4), a template (6), a reinforcing mesh (7), an anchoring bolt (8) and a reinforcing beam (10) to form a whole, the structures of the left chassis (27) and the right chassis (28) are almost completely symmetrical, the difference is that the positions of a mounting hole and the anchoring bolt (8) on the two bottom plates (2) are staggered by the width of the bridge plate (1), the left chassis (27) and the right chassis (28) span a bearing gap of the bridge expansion joint assembly, the bridge expansion joint assembly (1) and the right chassis (28) are connected by the bridge expansion joint assembly, the left chassis (27) and the chassis (28), and the chassis (27) and the chassis (28), bridging board (1) afterbody one side is taken on bottom plate (2) of one side in addition, there is flexible hole (21) on the afterbody of bridging board (1), shoulder bolt (11) pass flexible hole (21) and connect bridging board (1) on bottom plate (2) and can slide, both ends and bridging board (1) end connection that expansion plate (3) are located bridge expansion joint assembly, the width of expansion plate (3) is the same with the width of bridging board (1), can stretch out and draw back the deformation, the deflection of bridge expansion joint assembly is absorbed in expansion plate (3).

2. A bridge expansion joint according to claim 1, wherein the left chassis (27) comprises a bottom plate (2), C-shaped steel (4), a template (6), a reinforcing mesh (7), an anchor bolt (8) and a reinforcing beam (10), the bottom plate (2) is a rectangular flat plate which is an assembly platform for all parts of the bridge expansion joint, the reinforcing beam (10) and the C-shaped steel (4) can improve the strength of the bottom plate (2) and reduce deformation, the length of the reinforcing beam (10) and the C-shaped steel (4) is the same as that of the bottom plate (2), the C-shaped steel (4) is flush with the side of the bottom plate (2), and a plurality of transverse and longitudinal reinforcing bars form the reinforcing mesh (7), the template (6) is a thin steel plate with the same length as the bottom plate (2), the template (6) is perpendicular to the bottom plate (2), a plurality of rows of mounting holes are formed in the bottom plate (2), anchoring bolts (8) are assembled on the mounting holes, the template (6) is parallel to the side end face of the box girder, guide angle iron (50) is arranged at the end head of the C-shaped steel (4), the guide angle iron (50) is clamped with the C-shaped steel (4) of the next set of bridge expansion joint to provide guidance for splicing and assembling, stepped bolts (11) are assembled on threaded holes (23) or welding nuts (39) of the bottom plate (2), and the right chassis (28) comprises the bottom plate (2), the C-shaped steel (4), the template (6), the reinforcing mesh (7), the anchor bolts (8) and the reinforcing beam (10) have the same structure as the left chassis (27).

3. A bridge expansion joint according to claim 1, wherein the bridge plate (1) is formed by channel steel (15), the lower surface of the channel steel (15) is a plane and is assembled with the bottom plate (2), the channel steel (15) is opened upwards, a plurality of partition plates (16) are arranged in the channel steel (15) for reinforcement, a row of anchor bolt holes (19) are formed in the bottom surface of the channel steel (15), a telescopic hole (21) is formed in the bottom surface of the channel steel (15), the telescopic hole (21) is a long-strip-shaped through hole, threaded holes (23) are formed in the periphery of the telescopic hole (21), an upper cover (13) is assembled on the telescopic hole (21) to block asphalt concrete, so that the asphalt concrete does not affect the telescopic sliding of the bridge plate (1), a round hole (22) is formed in the partition plate (16) at the tail part of the bridge plate (1), a pull rod hole (17) and a pull rod hole (18) are formed in the vertical edge of the channel steel (15) at the head part of the bridge plate (1), a plurality of plug holes (20) are long-waist-shaped through holes.

4. A bridge expansion joint according to claim 1, wherein the expansion plate (3) comprises a fixed block (24) and a sliding block (26), the fixed block (24) and the sliding block (26) are relatively crossed and can slide with each other, the fixed block (24) is formed by stacking a plurality of fixed vertical plates (30) and spacing blocks (32) at intervals, the fixed vertical plates (30) and the spacing blocks (32) are rectangular steel plates with a certain thickness, the height of the fixed vertical plates is the same as that of the channel steel (15), small holes (37) and large holes (38) are formed in the fixed vertical plates (30), bolt holes (18) are formed in the fixed vertical plates (30), and the pins (33) penetrate through the small holes (37) to connect the fixed vertical plates (30) and the spacing blocks (32) to form the fixed block (24), sliding block (26) are formed by stacking a plurality of sliding vertical plates (31) and spacing blocks (32) at intervals, sliding vertical plates (31) are rectangular steel plates with certain thicknesses, the thicknesses and the heights are the same as those of fixed vertical plates (30) and spacing blocks (32), small holes (37), large holes (38) and telescopic holes (21) are formed in the sliding vertical plates, the telescopic holes (21) are long strip-shaped through holes, the lengths of the through holes are larger than or equal to the maximum telescopic amount of an expansion joint, pins (33) penetrate through the small holes (37), connecting rods (34) penetrate through the large holes (38), and the sliding vertical plates (31) and the spacing blocks (32) are connected to form a sliding structure The block (26), fixed block (24) and sliding block (26) are crossed relatively together, insert bolt (35) in bolt hole (18) and telescopic hole (21), and bolt (35) are established ties telescopic plate (3) centre on bridging plate (1) of both sides and are avoided telescopic plate (3) from middle perk.