A bridge expansion device based on a geometrically variable system and a construction method thereof

Abstract

The present invention provides a bridge expansion device based on a geometrically variable system and a construction method thereof, which relates to the technical field of bridge expansion joints. The bridge expansion device includes a first connection block, a second connection block and a support block. The first connection block and the second connection block are both provided with a connection groove at one end close to each other. A plurality of load-bearing plates are provided between the first connection block and the second connection block. Both ends of the load-bearing plates are detachably connected to the connection groove through a connection assembly. The first connection block is connected to the main beam at one end away from the load-bearing plate. The support block is provided on the side of the second connection block away from the load-bearing plate. The support block is connected to the road at one end away from the second connection block. The bottom surface of the support block is provided on a foundation. An installation cavity is provided in the support block. A plug-in board is provided at one end of the second connection block away from the load-bearing plate. The plug-in board extends into the installation cavity through the plug-in groove. In the present invention, the load-bearing plate is detachably connected to the connection groove, which is convenient for quickly replacing a damaged load-bearing plate, shortening the replacement time and improving the replacement efficiency of the load-bearing plate.

Description

Technical Field

[0001] The invention relates to the technical field of bridge expansion joints, and in particular to a bridge expansion device based on a geometrically variable system and a construction method thereof. Background Art

[0002] The bridge expansion device is a device used to connect the two ends of a bridge and allow the bridge to expand and contract under different conditions. It is installed at the expansion joint of the bridge and plays a vital role in bridge engineering. The bridge expansion device can adjust the length, height or position of the bridge according to the influence of bridge stress and environmental changes to adapt to the deformation of the bridge structure. The main functions of the bridge expansion device include: adapting to bridge deck deformation, protecting bridge structure, and extending the service life of the bridge.

[0003] For example, the application with authorization announcement number CN220888294U discloses a bridge expansion joint structure in the field of bridge expansion joints, including a steel body, anchor steel bars, a buffer mechanism, a load-bearing plate, a connecting mechanism and a waterproof strip, wherein the anchor steel bars are evenly and fixedly connected to the outer side of the steel body, and the load-bearing plate is fixedly connected between the steel bodies through the buffer mechanism. In this bridge expansion joint structure, when the load-bearing plate is squeezed, the load-bearing plate descends, driving the second rotating seat to descend, causing the connecting rod to deflect, thereby causing the connecting rod to shrink inside the sleeve, driving the clamping plate to move, causing the clamping plate to squeeze the buffer spring and the damper, and buffering the impact through the deformation of the buffer spring. At the same time, when the load-bearing plate descends, the buffer rubber block is squeezed to deform it, thereby further buffering, thereby fully buffering the expansion joint, preventing it from being subjected to major vibration impact, reducing the wear of the expansion joint steel, and improving the service life of the expansion joint.

[0004] Since the load-bearing plates directly bear the repeated loads of vehicles, they are easily damaged during use. If the damaged load-bearing plates are not replaced in time, it will cause potholes on the bridge deck and even cause vehicle jumping, affecting traffic safety. Therefore, it is necessary to replace the damaged load-bearing plates in time. The load-bearing plates in the above-mentioned expansion joint structure are fixedly linked between the steel bodies through the buffer mechanism, which makes the load-bearing plates in the expansion joint structure difficult to disassemble, takes a long time to disassemble, and has low replacement efficiency. Summary of the invention

[0005] The present invention provides a bridge expansion device based on a geometrically variable system and a construction method thereof, so as to solve the vehicle jumping problem caused by the existence of bridge expansion joints and at least one technical problem that the load-bearing plates in the current expansion joint structure are difficult to disassemble, the disassembly time is long, and the replacement efficiency is low.

[0006] To solve the above technical problems, the present invention discloses a bridge expansion device based on a geometrically variable system, comprising: a first connecting block, a second connecting block and a supporting block, wherein connecting grooves are arranged at the ends of the first connecting block and the second connecting block close to each other, a plurality of load-bearing plates are arranged between the first connecting block and the second connecting block, and the two ends of the load-bearing plates are detachably connected to the connecting grooves through connecting components, the end of the first connecting block away from the load-bearing plate is connected to the main beam, the supporting block is arranged on the side of the second connecting block away from the load-bearing plate, the end of the support block away from the second connecting block is connected to the road, the bottom surface of the supporting block is arranged on the foundation, an installation cavity is arranged in the support block, a plug-in groove is arranged on the side of the installation cavity close to the second connecting block, a plug-in plate is arranged on the end of the second connecting block away from the load-bearing plate, and the plug-in plate extends into the installation cavity through the plug-in groove.

[0007] Preferably, the connecting component includes a cylindrical hole and a connecting column, the two cylindrical holes are symmetrically arranged on the lower surfaces of the left and right ends of the force-bearing plate, the connecting column is rotatably arranged in the cylindrical hole, and the lower end of the connecting column is connected to the horizontal surface of the connecting groove.

[0008] Preferably, the cross-section of the end of the load-bearing plate is semicircular, and the vertical surface of the connecting groove is adapted to the end of the load-bearing plate.

[0009] Preferably, a gap is provided between two adjacent load-bearing plates.

[0010] Preferably, a mounting groove is provided on the support block, the length direction of the mounting groove is perpendicular to the length direction of the force-bearing plate, the mounting groove is located below the second connecting block, a plurality of first balls are provided in the mounting groove, and the lower surface of the second connecting block contacts the outer wall of the first balls.

[0011] Preferably, the outer wall of the plug board is slidably connected to the inner wall of the plug slot.

[0012] Preferably, the plug board and the second connecting block are integrally formed.

[0013] Preferably, partition blocks are symmetrically arranged on the upper and lower sides of the plug board, and the partition blocks and the plug board are designed to be integrally formed.

[0014] Preferably, a plurality of second balls are arranged on the left and right sides of the partition block, and the outer walls of the second balls are in contact with the inner wall of the installation cavity and the outer wall of the plug-in board respectively.

[0015] It also includes a construction method for a bridge expansion device based on a geometrically variable system, which is used to construct the above-mentioned bridge expansion device based on a geometrically variable system, including the following steps: connecting one end of the first connecting block to the main beam, placing the support block on the foundation, connecting one end of the support block to the road, and then plugging the plug-in plate into the installation cavity, the first connecting block and the second connecting block are arranged opposite to each other, and then installing the load-bearing plate between the first connecting block and the second connecting block to form a bridge expansion device.

[0016] The technical solution of the present invention has the following advantages: the present invention provides a bridge expansion device based on a geometrically variable system and a construction method thereof, which relates to the technical field of bridge expansion joints. The bridge expansion device includes a first connecting block, a second connecting block and a supporting block. The first connecting block and the second connecting block are both provided with connecting grooves at one end close to each other. A plurality of load-bearing plates are provided between the first connecting block and the second connecting block. The two ends of the load-bearing plates are detachably connected to the connecting grooves through connecting components. The end of the first connecting block away from the load-bearing plate is connected to the main beam. The supporting block is provided on the side of the second connecting block away from the load-bearing plate. The end of the support block away from the second connecting block is connected to the road. The bottom surface of the support block is provided on the foundation. An installation cavity is provided in the support block. A plug-in plate is provided at the end of the second connecting block away from the load-bearing plate. The plug-in plate extends into the installation cavity through the plug-in groove. In the present invention, the load-bearing plate and the connecting groove are detachably connected, which is convenient for quickly replacing the damaged load-bearing plate, shortens the replacement time, and improves the replacement efficiency of the load-bearing plate. The bridge expansion device replaces the expansion device of the existing bridge, eliminates the expansion joint, and avoids the vehicle jumping phenomenon caused by damage to the load-bearing plate and the existence of the expansion joint, thereby ensuring the traffic capacity of the bridge road and improving traffic safety.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the devices particularly pointed out in the written description and the drawings of the description.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of a bridge expansion device based on a geometrically variable system of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the second connecting block and the plug board in the present invention;

[0022] Figure 3 This is a schematic diagram of the support block structure in the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the first connection block in the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the force-bearing plate in the present invention;

[0025] Figure 6It is a schematic diagram of the first ball structure in the present invention.

[0026] In the figure: 1. first connecting block; 2. second connecting block; 3. supporting block; 4. connecting groove; 5. force plate; 6. mounting cavity; 7. plug-in groove; 8. plug-in plate; 9. cylindrical hole; 10. connecting column; 11. gap; 12. mounting groove; 13. first ball; 14. separator block; 15. second ball. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Example 1

[0030] The embodiment of the present invention provides a bridge expansion device based on a geometrically variable system, such as Figure 1-Figure 6 As shown, it includes: a first connecting block 1, a second connecting block 2 and a supporting block 3. A connecting groove 4 is arranged at one end of the first connecting block 1 and the second connecting block 2 close to each other. A plurality of load-bearing plates 5 are arranged between the first connecting block 1 and the second connecting block 2. Both ends of the load-bearing plates 5 are detachably connected to the connecting groove 4 through connecting components. The end of the first connecting block 1 away from the load-bearing plate 5 is connected to the main beam, the supporting block 3 is arranged on the side of the second connecting block 2 away from the load-bearing plate 5, and the end of the support block 3 away from the second connecting block 2 is connected to the road. The bottom surface of the supporting block 3 is arranged on the foundation, an installation cavity 6 is arranged in the supporting block 3, a plug-in groove 7 is arranged on the side of the installation cavity 6 close to the second connecting block 2, and a plug-in plate 8 is arranged on the end of the second connecting block 2 away from the load-bearing plate 5, and the plug-in plate 8 extends into the installation cavity 6 through the plug-in groove 7.

[0031] The working principle and beneficial effects of the above technical solution are as follows: the bridge expansion device in the present invention is arranged at the expansion joint of the bridge to replace the existing expansion device and eliminate the expansion joint of the bridge. Specifically, one end of the first connecting block 1 is fixedly connected to the main beam, and a connecting groove 4 is set at the other end of the first connecting block 1. Then, a support block 3 is set at a position relative to the first connecting block 1. The support block 3 is set on a foundation, which is a road base. The foundation provides support for the support block 3. One end of the support block 3 is connected to the road. Then, the plug-in plate 8 is inserted into the plug-in groove 7 from the front or the back. The plug-in plate 8 slides along the plug-in groove 7 and drives the second connecting block 2 to move, so that the connecting groove 4 of the second connecting block 2 is arranged relative to the connecting groove 4 of the first connecting block 1. Then, multiple load-bearing plates 5 are installed in sequence between the first connecting block 1 and the second connecting block 2. The load-bearing plates 5 are detachably connected to the connecting groove 4, which is convenient for quickly replacing damaged load-bearing plates 5, shortening the replacement time, and improving the replacement efficiency of the load-bearing plates 5. The bridge expansion device replaces the expansion device of the existing bridge, and eliminates the expansion joint. At the same time, the vehicle jumping phenomenon caused by damage to the load-bearing plate 5 and the existence of the expansion joint is avoided, thereby ensuring the traffic capacity of the bridge road and improving traffic safety.

[0032] Example 2

[0033] On the basis of the above-mentioned embodiment 1, Figure 1-Figure 6 As shown, the connecting assembly includes a cylindrical hole 9 and a connecting column 10. The two cylindrical holes 9 are symmetrically arranged on the lower surfaces of the left and right ends of the force-bearing plate 5. The connecting column 10 is rotatably arranged in the cylindrical hole 9, and the lower end of the connecting column 10 is connected to the horizontal surface of the connecting groove 4;

[0034] The cross section of the end of the load-bearing plate 5 is semicircular, and the vertical surface of the connecting groove 4 is adapted to the end of the load-bearing plate 5;

[0035] A gap 11 is provided between two adjacent load-bearing plates 5 .

[0036] The working principle and beneficial effects of the above technical solution are as follows: the load-bearing plate 5 is detachably connected to the connecting groove 4 through a connecting assembly. When installing the load-bearing plate 5, first align the two cylindrical holes 9 on the lower surface of the load-bearing plate 5 with the connecting columns 10 on the connecting grooves 4 of the first connecting block 1 and the second connecting block 2 respectively, and then lower the load-bearing plate 5 so that the two connecting columns 10 are respectively inserted into the corresponding cylindrical holes 9. At this time, the first connecting block 1 and the second connecting block 2 are connected through the load-bearing plate 5, and the load-bearing plate 5 can withstand the load. When removing the load-bearing plate 5, it is only necessary to tilt the load-bearing plate 5 upward to make the load-bearing plate 5 move upward. After separating the connecting column 10 from the cylindrical hole 9, the load-bearing plate 5 can be removed from between the first connecting block 1 and the second connecting block 2, which is convenient for rapid replacement of damaged load-bearing plates 5, shortens the replacement time, improves the replacement efficiency of the load-bearing plates 5, and ensures the bridge pavement. The second connecting block 2 drives the plug-in board 8 to move laterally, that is, the load-bearing plate 5 rotates around the connecting column 10, and the distance between the first connecting block 1 and the second connecting block 2 changes, so as to adapt to the deformation of the main beam and eliminate the expansion joint. A gap 11 is set between adjacent load-bearing plates 5 to facilitate the rotation of the load-bearing plate 5. The end of the load-bearing plate 5 is semicircular, and the vertical surface of the connecting groove 4 is matched with the end of the load-bearing plate 5, which can avoid interference when the load-bearing plate 5 rotates, improves the stability of the load-bearing plate 5, and improves the reliability of the connection between the load-bearing plate 5 and the first connecting block 1 and the second connecting block 2.

[0037] Example 3

[0038] On the basis of Example 2, Figure 3 As shown, a mounting groove 12 is provided on the support block 3, and the length direction of the mounting groove 12 is perpendicular to the length direction of the force-bearing plate 5. The mounting groove 12 is located below the second connecting block 2. A plurality of first balls 13 are provided in the mounting groove 12, and the lower surface of the second connecting block 2 contacts the outer wall of the first balls 13.

[0039] The working principle and beneficial effects of the above technical solution are as follows: the second ball 15 can support the second connecting block 2. When the second connecting block 2 moves, the lower surface of the second connecting block 2 drives the second ball 15 to rotate in the mounting groove 12. The rolling friction replaces the sliding friction, thereby reducing the friction between the second connecting block 2 and the supporting block 3, making the movement of the second connecting block 2 smoother, thereby adapting to the deformation of the main beam, improving the adaptability, and being able to reduce the wear of the second connecting block 2, thereby extending the service life of the second connecting block 2.

[0040] Example 4

[0041] On the basis of Example 2 or 3, Figure 1 As shown, the outer wall of the plug board 8 is slidably connected with the inner wall of the plug slot 7;

[0042] The plug board 8 and the second connecting block 2 are designed as an integral piece;

[0043] The partition blocks 14 are symmetrically arranged on the upper and lower sides of the plug board 8, and the partition blocks 14 and the plug board 8 are integrally formed;

[0044] A plurality of second balls 15 are arranged on the left and right sides of the partition block 14 , and the outer walls of the second balls 15 are in contact with the inner wall of the installation cavity 6 and the outer wall of the plug board 8 respectively.

[0045] The working principle and beneficial effects of the above technical solution are as follows: the plug-in board 8 and the second connecting block 2 are designed in an integral manner, which can improve the stability and reliability of the connection between the plug-in board 8 and the second connecting block 2, and extend the service life of the plug-in board 8 and the second connecting block 2. When the main beam structure is deformed, the force-bearing plate 5 connected to the first connecting block 1 can drive the second connecting block 2 to move accordingly, and the second connecting block 2 drives the plug-in board 8 to slide in the plug-in groove 7. The upper and lower sides of the plug-in board 8 are respectively in contact with the second ball 15, and drive the second ball 15 to roll in the installation cavity 6. Through the constraints of the plug-in groove 7, the second ball 15 and the partition block 14, the second connecting block 2 is laterally displaced relative to the support block 3, and the second ball 15 is connected to the second connecting block 3. When the distance between the first connecting block 1 and the second connecting block 2 changes, the load-bearing plate 5 adaptively rotates between the first connecting block 1 and the second connecting block 2. The load-bearing plate 5 can adapt to the change in the distance between the first connecting block 1 and the second connecting block 2 while ensuring stable support, thereby eliminating the expansion joint of the existing bridge, improving the flatness of the bridge road surface, ensuring the traffic capacity of the bridge road, and improving traffic safety. By arranging the second ball 15 and the partition block 14, it is possible to prevent the plug-in plate 8 from being directly pulled out of the plug-in slot 7, thereby improving the stability of the structure. In addition, the second ball 15 can reduce friction, reduce the wear of the plug-in plate 8 and the support block 3, and extend the overall service life of the bridge expansion device.

[0046] Example 5

[0047] On the basis of any one of Examples 1-4, a method for constructing a bridge expansion device based on a geometrically variable system is also included, which is used to construct the above-mentioned bridge expansion device based on a geometrically variable system, including the following steps: connecting one end of the first connecting block 1 to the main beam, and placing the support block 3 on the foundation, connecting one end of the support block 3 to the road, and then plugging the plug-in plate 8 into the installation cavity 6, the first connecting block 1 and the second connecting block 2 are arranged opposite to each other, and then installing the load-bearing plate 5 between the first connecting block 1 and the second connecting block 2 to form a bridge expansion device.

[0048] The working principle and beneficial effects of the above technical solution are as follows: one end of the first connecting block 1 is fixedly connected to the main beam, a connecting groove 4 is set at the other end of the first connecting block 1, and then a support block 3 is set at a position relative to the first connecting block 1, the support block 3 is set on the foundation, the foundation provides support for the support block 3, and one end of the support block 3 is connected to the road, and then the plug-in board 8 is inserted into the plug-in groove 7 from the front or the back side. During the insertion process, the second balls 15 are gradually placed on the upper and lower sides of the plug-in board 8, and the first balls 13 are gradually placed in the installation groove 12, and the plug-in board 8 slides along the plug-in groove 7 and drives the second connecting block 2 Movement makes the connecting groove 4 of the second connecting block 2 relatively arranged with the connecting groove 4 of the first connecting block 1, and then a plurality of load-bearing plates 5 are installed in sequence between the first connecting block 1 and the second connecting block 2. The load-bearing plates 5 are detachably connected to the connecting groove 4, which is convenient for quickly replacing damaged load-bearing plates 5, shortening the replacement time and improving the replacement efficiency of the load-bearing plates 5. The expansion device of the existing bridge is replaced by the bridge expansion device, and the expansion joint is eliminated. At the same time, the jumping phenomenon caused by damage to the load-bearing plates 5 and the existence of the expansion joint is avoided, thereby ensuring the traffic capacity of the bridge road and improving traffic safety.

[0049] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A bridge expansion device based on a geometrically variable system, characterized in that: include: A first connecting block (1), a second connecting block (2) and a supporting block (3), wherein a connecting groove (4) is provided at one end of the first connecting block (1) and the second connecting block (2) close to each other, a plurality of load-bearing plates (5) are provided between the first connecting block (1) and the second connecting block (2), and both ends of the load-bearing plates (5) are detachably connected to the connecting groove (4) through connecting components, an end of the first connecting block (1) away from the load-bearing plate (5) is connected to the main beam, the supporting block (3) is provided on a side of the second connecting block (2) away from the load-bearing plate (5), and an end of the supporting block (3) away from the second connecting block (2) is connected to the road, the bottom surface of the supporting block (3) is provided on a foundation, an installation cavity (6) is provided in the supporting block (3), a plug-in groove (7) is provided on a side of the installation cavity (6) close to the second connecting block (2), and a plug-in plate (8) is provided on an end of the second connecting block (2) away from the load-bearing plate (5), and the plug-in plate (8) extends into the installation cavity (6) through the plug-in groove (7); The connecting assembly comprises a cylindrical hole (9) and a connecting column (10), wherein the two cylindrical holes (9) are symmetrically arranged on the lower surfaces of the left and right ends of the force-bearing plate (5), and the connecting column (10) is rotatably arranged in the cylindrical hole (9), and the lower end of the connecting column (10) is connected to the horizontal surface of the connecting groove (4); The cross section of the end of the load-bearing plate (5) is semicircular, and the vertical surface of the connecting groove (4) is adapted to the end of the load-bearing plate (5); A gap (11) is provided between two adjacent force-bearing plates (5).

2. The bridge expansion device based on a geometrically variable system according to claim 1 is characterized in that: A mounting groove (12) is provided on the support block (3), the length direction of the mounting groove (12) is perpendicular to the length direction of the force-bearing plate (5), the mounting groove (12) is located below the second connection block (2), a plurality of first balls (13) are provided in the mounting groove (12), and the lower surface of the second connection block (2) contacts the outer wall of the first balls (13).

3. The bridge expansion device based on a geometrically variable system according to claim 1 is characterized in that: The outer wall of the plug-in board (8) is slidably connected to the inner wall of the plug-in slot (7).

4. The bridge expansion device based on a geometrically variable system according to claim 1 is characterized in that: The plug board (8) and the second connection block (2) are designed to be integrally formed.

5. The bridge expansion device based on a geometrically variable system according to claim 1 is characterized in that: The partition blocks (14) are symmetrically arranged on the upper and lower sides of the plug board (8), and the partition blocks (14) and the plug board (8) are designed to be integrally formed.

6. The bridge expansion device based on a geometrically variable system according to claim 5 is characterized in that: A plurality of second balls (15) are arranged on the left and right sides of the partition block (14), and the outer walls of the second balls (15) are in contact with the inner wall of the installation cavity (6) and the outer wall of the plug-in board (8) respectively.

7. A method for constructing a bridge expansion device based on a geometrically variable system, used to construct a bridge expansion device based on a geometrically variable system as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: One end of the first connection block (1) is connected to the main beam, and the support block (3) is placed on the foundation. One end of the support block (3) is connected to the road. Then the plug-in plate (8) is plugged into the installation cavity (6). The first connection block (1) and the second connection block (2) are arranged opposite to each other. Then, the load-bearing plate (5) is installed between the first connection block (1) and the second connection block (2) to form a bridge expansion device.

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