Width-splicing bridge connecting device

Abstract

The utility model discloses a widening bridge connecting device which comprises a widening bridge flange plate, an old bridge flange plate, a filling layer assembly, a pavement layer assembly and a connecting assembly, one side of the widening bridge flange plate is connected with the old bridge flange plate, a gap is formed between the widening bridge flange plate and the old bridge flange plate, the filling layer assembly is arranged in the gap, and the pavement layer assembly is connected with the connecting assembly. The filling layer assembly is used for improving the waterproofness of a gap between the width splicing bridge flange plate and the old bridge flange plate, and the pavement layer assembly is arranged on the upper portion of the width splicing bridge flange plate and the upper portion of the old bridge flange plate and used for improving the pressure resistance of the width splicing bridge flange plate and the old bridge flange plate; the connecting assembly is arranged in the paving layer assembly on the upper portion of the wide bridge flange plate and the upper portion of the old bridge flange plate and used for connecting and fixing the wide bridge flange plate and the old bridge flange plate. According to the utility model, the flange plate of the spliced wide bridge and the flange plate of the old bridge are fixed through the connecting assembly, so that the crack and cracking conditions of a concrete bridge deck pavement layer are effectively reduced, and the strength and durability of the bridge deck are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, and in particular to a splicing and widening bridge connection device. Background Art

[0002] With the explosive growth of my country's transportation industry, the demand for transportation is increasing. Compared with the 1980s and 1990s, my country's current transportation flow and load level have increased significantly, which makes many highways originally built unable to meet the current transportation demand and need to be rebuilt and expanded. The key to highway reconstruction and expansion is the reconstruction and expansion of nodes such as bridges. In order to reduce the cost of the project, reduce the impact on the original traffic during the construction period, and reduce the land use, bridge expansion is more popular; for the connection device between the new and old bridge structures in the expansion of highway bridges, there are currently mainly the following forms;

[0003] The first connection method is that the upper and lower structures of the new and old bridges are both independent; the upper structure and the lower structure are both independent in this splicing mode. Its advantage is that the new and old bridges can function independently, which simplifies the construction procedures and eliminates technical problems in the connection. However, under the action of live loads from cars, the main beams of the two bridges produce unbalanced deflections, and the widened bridge has a larger subsequent settlement than the original bridge, which will cause damage to the asphalt pavement layer at the connection, forming longitudinal cracks and transverse bridge misalignment, affecting driving comfort and bridge deck appearance, and increasing subsequent maintenance work. It is not appropriate to use this connection method on a large scale.

[0004] The second connection method is to connect the upper and lower structures of the new and old bridges. The advantage of the splicing mode in which both the upper and lower structures are connected is that the spliced ​​bridge and the original bridge can form a unified whole, which can reduce the inconsistent deformation of the connection caused by the load and has good integrity; the problem is that the foundation settlement of the widened bridge is greater than that of the old bridge. Due to the large additional internal force, cracks may still occur at the connection between the abutment, tie beam and cap beam of the lower structure; cracks may also occur at the connection of the upper structure, and it is difficult to repair; the construction of embedded reinforcement is complex, costly, and has many steps. The design cost and difficulty are high, which is not conducive to widespread application.

[0005] The third connection method is to connect the superstructures of the new and old bridges, and leave the substructures independent. The advantage of this widening method is that the substructure is less affected by the internal force generated by the superstructure, and the substructures of the new and old bridges are stressed separately; after the superstructure is connected, the upper parts of the new and old bridges can be stressed as a whole, which can effectively improve driving comfort. At the same time, the rigid connection of the superstructure will lead to the lateral redistribution of the vehicle load, which is beneficial to the old bridge in most cases; the construction cost is low, the steps are simple, and the construction difficulty is moderate.

[0006] In summary, the current connection method between the new and old bridge structures is mainly a rigid upper connection and an independent lower structure. However, the disadvantage of this connection method is that the difference between the new and old materials and the uneven settlement of the new and old bridges will increase the internal force at the connection of the upper structure, and cracks may occur locally. To solve this problem, measures such as increasing the reinforcement and improving the connection structure can be adopted to strengthen the connection between the new and old bridges, reduce the adverse effects of uneven settlement on the connection between the new and old bridges, and maximize the advantages of the connection method of connecting the upper structure of the new and old bridges and the independent lower structure. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a bridge widening connection device to solve the problem of easy cracking at the connection between the flange plates of the new and old bridges in the connection mode where the upper structures of the new and old bridges are connected and the lower structures are independent. The invention provides a prefabricated beam widening design and construction method which can effectively optimize the stress at the connection between the flange plates of the new and old bridges, enhance the overall stability of the bridge structure, and improve the driving comfort of the bridge deck, while avoiding the stress cracking, damage and other defects at the connection between the flange plates of the new and old bridges caused by factors such as material differences and uneven settlement between the new and old bridges.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a connecting device for a widened bridge, comprising a widened bridge flange plate, an old bridge flange plate, a filling layer assembly, a pavement layer assembly, and a connecting assembly, wherein the old bridge flange plate is installed and connected to one side of the widened bridge flange plate, a gap is formed between the widened bridge flange plate and the old bridge flange plate, a filling layer assembly is arranged in the gap, the filling layer assembly is used to improve the waterproofness of the gap between the widened bridge flange plate and the old bridge flange plate, a pavement layer assembly is arranged on the upper part of the widened bridge flange plate and the old bridge flange plate, the pavement layer assembly is used to improve the compressive capacity of the widened bridge flange plate and the old bridge flange plate, and the connecting assembly is arranged in the pavement layer assembly on the upper part of the widened bridge flange plate and the old bridge flange plate, and is used to connect and fix the widened bridge flange plate and the old bridge flange plate.

[0009] Preferably, the flange plate of the widened bridge is consistent in height with the flange plate of the old bridge.

[0010] Preferably, the pavement layer assembly includes an ultra-high performance concrete bridge deck pavement layer, an ordinary concrete bridge deck pavement layer and a bridge deck asphalt pavement layer. The ultra-high performance concrete bridge deck pavement layer and the ordinary concrete bridge deck pavement layer are arranged on the upper part of the widened bridge flange plate and the old bridge flange plate, and the ultra-high performance concrete bridge deck pavement layer and the ordinary concrete bridge deck pavement layer are provided with a bridge deck asphalt pavement layer on top.

[0011] Preferably, the ultra-high performance concrete bridge deck pavement layer is symmetrically arranged at the upper part of the gap between the widened bridge flange plate and the old bridge flange plate with respect to the axis center of the widened bridge flange plate and the old bridge flange plate.

[0012] Preferably, the connecting assembly includes longitudinal reinforcing steel bars and transverse reinforcing steel bars. The longitudinal reinforcing steel bars are embedded in the ultra-high performance concrete bridge deck pavement layer, and the transverse reinforcing steel bars are respectively embedded in the ordinary concrete bridge deck pavement layer of the widened bridge flange plate and the old bridge flange plate, and the transverse reinforcing steel bars are symmetrically distributed in two with the widened bridge flange plate and the old bridge flange plate as the center axis, and the longitudinal reinforcing steel bars and the transverse reinforcing steel bars are connected by binding or welding.

[0013] Preferably, the connecting assembly also includes U-shaped steel bars, which are arranged on the upper part of the widened bridge flange plate and the old bridge flange plate, and there are two U-shaped steel bars in total. The U-shaped steel bars are arranged on the upper part of the widened bridge flange plate and the old bridge flange plate by pre-embedding and planting reinforcement between the widened bridge flange plate and the old bridge flange plate.

[0014] Preferably, the connection assembly further comprises bridge deck steel bars, the transverse reinforcing steel bars are divided into two layers, and bridge deck steel bars are further provided between the two layers of transverse reinforcing steel bars.

[0015] Preferably, the filling layer assembly includes polyurethane rubber caulking, polyethylene foam plastic board, rubber pad and stainless steel plate, a polyethylene foam plastic board is provided at the lower part of the gap between the widened bridge flange board and the old bridge flange board, a rubber pad is provided at the upper part of the gap between the widened bridge flange board and the old bridge flange board, the rubber pad is located below the ultra-high performance concrete bridge deck pavement layer, and the rubber pad is arranged along the longitudinal length of the widened bridge flange board and the old bridge flange board, and a polyurethane rubber caulking is provided between the polyethylene foam plastic board and the rubber pad, the polyurethane rubber caulking is arranged in the gap between the widened bridge flange board and the old bridge flange board, and the upper part of the polyethylene foam plastic board is arranged longitudinally, and a stainless steel plate is also provided at the lower part of the rubber pad, and the stainless steel plate is arranged along the longitudinal length of the widened bridge flange board and the old bridge flange board.

[0016] Preferably, the rubber pad and the stainless steel plate have the same thickness, and the transverse length of the stainless steel plate along the widened bridge flange plate and the old bridge flange plate is half of the transverse length of the rubber pad.

[0017] Compared with the existing technology, the utility model has the following beneficial effects: the utility model connects the widened bridge flange plate and the old bridge flange plate by adopting a connecting component, effectively reducing the cracks and cracking of the ultra-high performance concrete bridge deck pavement layer and the ordinary concrete bridge deck pavement layer, and improving the strength and durability of the bridge deck; and a filling layer component is used in the gap between the widened bridge flange plate and the old bridge flange plate, which plays a certain buffering role, and also prevents water vapor from entering the widened bridge flange plate and the old bridge flange plate, reducing the probability of longitudinal and transverse reinforcing steel bars being rusted, and an ultra-high performance concrete bridge deck pavement is provided above the widened bridge flange plate and the old bridge flange plate, which greatly enhances the crack resistance and durability of the flange plate connection and maintains the smoothness of the bridge deck; the gap between the widened bridge flange plate and the old bridge flange plate is filled with polyurethane rubber caulking and polyethylene foam plastic board, which is convenient to construct, can effectively prevent water vapor from entering, and improves the durability of the connection between the widened bridge flange plate and the old bridge flange plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the connection structure between the flange plate of the widened bridge and the flange plate of the old bridge.

[0019] Figure 2 This is a practical construction structure diagram for demolishing the old bridge's crash wall and paving concrete.

[0020] Markings in the figure: 1. Widened bridge flange plate, 2. Old bridge flange plate, 3. Polyurethane rubber caulking, 4. Polyethylene foam plastic board, 5. Rubber pad, 6. Stainless steel plate, 7. Ultra-high performance concrete bridge deck pavement layer, 8. Ordinary concrete bridge deck pavement layer, 9. Bridge deck asphalt pavement layer, 10. Longitudinal reinforcement steel bars, 11. Transverse reinforcement steel bars, 12. U-shaped steel bars, 13. Bridge deck steel bars. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 2 As shown, the utility model provides a technical solution: a connecting device for a widened bridge, comprising a widened bridge flange plate 1, an old bridge flange plate 2, a filling layer assembly, a pavement layer assembly, and a connecting assembly, wherein the old bridge flange plate 2 is installed and connected to one side of the widened bridge flange plate 1, a gap is formed between the widened bridge flange plate 1 and the old bridge flange plate 2, a filling layer assembly is arranged in the gap, the filling layer assembly is used to improve the waterproofness of the gap between the widened bridge flange plate 1 and the old bridge flange plate 2, a pavement layer assembly is arranged on the upper part of the widened bridge flange plate 1 and the old bridge flange plate 2, the pavement layer assembly is used to improve the compressive capacity of the widened bridge flange plate 1 and the old bridge flange plate 2, and the connecting assembly is arranged in the pavement layer assembly on the upper part of the widened bridge flange plate 1 and the old bridge flange plate 2, and is used to connect and fix the widened bridge flange plate 1 and the old bridge flange plate 2.

[0022] Furthermore, the widened bridge flange plate 1 is consistent in height with the old bridge flange plate 2, and the gap between the widened bridge flange plate 1 and the old bridge flange plate 2 is 2 cm, and a crash barrier is provided on the top of the old bridge flange plate 2; first, the outer crash barrier around the old bridge flange plate 2 and the bridge deck asphalt pavement layer 9 are demolished, and a 2 cm gap between the widened bridge flange plate 1 and the old bridge flange plate 2 is retained, and the widened bridge flange plate 1 is kept at the same height as the top edge of the old bridge flange plate 2 described in the bridge, widening, crack resistance and durability.

[0023] Furthermore, the pavement layer assembly includes an ultra-high performance concrete bridge deck pavement layer 7, an ordinary concrete bridge deck pavement layer 8 and an asphalt bridge deck pavement layer 9. The ultra-high performance concrete bridge deck pavement layer 7 and the ordinary concrete bridge deck pavement layer 8 are arranged on the upper part of the widened bridge flange plate 1 and the old bridge flange plate 2, and the upper part of the ultra-high performance concrete bridge deck pavement layer 7 and the ordinary concrete bridge deck pavement layer 8 is provided with an asphalt bridge deck pavement layer 9; an ultra-high performance concrete bridge deck pavement layer 7 is used above the widened bridge flange plate 1 and the old bridge flange plate 2. Compared with ordinary concrete, this type of concrete has higher compressive strength, tensile strength and flexural strength, and at the same time, its durability is also very outstanding. It can resist various natural and environmental erosion, impermeability, frost resistance and corrosion resistance, thereby effectively enhancing the crack resistance and durability of the flange plate connection and maintaining the smoothness of the bridge deck.

[0024] Furthermore, the ultra-high performance concrete bridge deck pavement layer 7 is symmetrically arranged at the upper part of the gap between the widened bridge flange plate 1 and the old bridge flange plate 2 with respect to the axis center of the widened bridge flange plate 1 and the old bridge flange plate 2, and the ultra-high performance concrete bridge deck pavement layer 7 is 0.8 meters to 1 meter of the transverse length of the widened bridge flange plate 1 and the old bridge flange plate 2.

[0025] Furthermore, the connection assembly includes a longitudinal reinforcing steel bar 10 and a transverse reinforcing steel bar 11. The longitudinal reinforcing steel bar 10 is embedded in the ultra-high performance concrete bridge deck pavement layer 7, and the transverse reinforcing steel bar 11 is respectively embedded in the ordinary concrete bridge deck pavement layer 8 of the widened bridge flange plate 1 and the old bridge flange plate 2, and the transverse reinforcing steel bars 11 are symmetrically distributed in two with the widened bridge flange plate 1 and the old bridge flange plate 2 as the center axis, and the longitudinal reinforcing steel bar 10 and the transverse reinforcing steel bar 11 are connected by binding or welding, and the longitudinal reinforcing steel bar 10 is about 0.1 meter of the transverse bridge spacing between the widened bridge flange plate 1 and the old bridge flange plate 2.

[0026] Furthermore, the connection component also includes U-shaped steel bars 12, which are arranged on the upper parts of the widened bridge flange plate 1 and the old bridge flange plate 2, and there are two U-shaped steel bars 12 in total. The U-shaped steel bars 12 are arranged on the upper parts of the widened bridge flange plate 1 and the old bridge flange plate 2 by pre-embedding and planting between the widened bridge flange plate 1 and the old bridge flange plate 2; longitudinal reinforcing steel bars 10, transverse reinforcing steel bars 11 and U-shaped steel bars 12 are arranged in the ultra-high performance concrete bridge deck pavement layer 7 and the ordinary concrete bridge deck pavement layer 8, which greatly improves the connection stiffness between the widened bridge flange plate 1 and the old bridge flange plate 2, reduces the inconsistency of the deformation of the two, effectively reduces the cracks and cracking of the ultra-high performance concrete bridge deck pavement layer 7 and the ordinary concrete bridge deck pavement layer 8, improves the strength and durability of the bridge deck, and ensures the safe and comfortable driving on the bridge deck.

[0027] Furthermore, the connection assembly also includes bridge deck steel bars 13. The transverse reinforcing steel bars 11 are divided into two layers, and bridge deck steel bars 13 are further provided between the two layers of the transverse reinforcing steel bars 11. The transverse reinforcing steel bars 11 are about 0.1 meters of the longitudinal distance between the widened bridge flange plate 1 and the old bridge flange plate 2, and the left and right sides of the transverse reinforcing steel bars 11 extend into the ordinary concrete bridge deck pavement layer for about 80.5 meters respectively.

[0028] Further, the filling layer assembly includes a polyurethane rubber caulking 3, a polyethylene foam plastic plate 4, a rubber pad 5 and a stainless steel plate 6. A polyethylene foam plastic plate 4 is provided at the lower part of the gap between the widened bridge flange plate 1 and the old bridge flange plate 2, and a rubber pad 5 is provided at the upper part of the gap between the widened bridge flange plate 1 and the old bridge flange plate 2. The rubber pad 5 is located below the ultra-high performance concrete bridge deck pavement layer 7, and the rubber pad 5 is arranged along the longitudinal length of the widened bridge flange plate 1 and the old bridge flange plate 2, and a polyurethane rubber caulking 3 is provided between the polyethylene foam plastic plate 4 and the rubber pad 5. The polyurethane rubber caulking 3 is arranged in the gap between the widened bridge flange plate 1 and the old bridge flange plate 2, and the upper part of the polyethylene foam plastic plate 4 is arranged longitudinally through-length. A stainless steel plate 6 is also provided at the lower part of the rubber pad 5, and the stainless steel plate 6 is arranged along the longitudinal length of the widened bridge flange plate 1 and the old bridge flange plate 2; the gap between the widened bridge flange plate 1 and the old bridge flange plate 2 is filled with the polyurethane rubber caulking 3 and the polyethylene foam plastic plate 4;

[0029] A rubber pad 5 is arranged below the ultra-high performance concrete bridge deck pavement layer 7. The rubber pad 5 has high elasticity, which can not only play a certain buffering role and effectively disperse the weight and load of the bridge deck, but also effectively reduce the constraint of the bridge deck pavement layer on the deformation of the main beam, thereby effectively improving the stress performance of the connection part of the widened bridge flange plate 1 and the old bridge flange plate 2. In addition, it can also prevent water vapor from entering the widened bridge flange plate 1 and the old bridge flange plate 2, and reduce the probability of corrosion of the longitudinal and transverse reinforcing steel bars 11 and the like;

[0030] A stainless steel plate 6 is provided under the rubber pad 5, which can effectively reduce the upper load concentration, improve the stress condition at the connection between the widened bridge flange plate 1 and the old bridge flange plate 2, and ensure the structural stability of the bridge; the addition of the stainless steel plate 6 can also protect the rubber pad 5, making it difficult for the rubber pad 5 to be damaged and aged due to the load, thereby ensuring the service life of the rubber pad 5;

[0031] The gap between the wide bridge flange plate 1 and the old bridge flange plate 2 is filled with polyurethane rubber caulking 3. The material is light in weight and convenient to construct. No special tools are required and any shape of gap can be filled as needed. It has the characteristics of strong bonding performance, water resistance, wear resistance and corrosion resistance, and can effectively prevent water vapor from entering, thus improving the durability of the connection between the wide bridge flange plate 1 and the old bridge flange plate 2.

[0032] At the same time, the gap between the flange plate 1 of the wide bridge and the flange plate 2 of the old bridge is filled with polyethylene foam plastic board 4. This material is easy to process and construct, which can greatly improve the construction efficiency. It has excellent waterproof and mechanical properties, high strength and rigidity, good durability and corrosion resistance, and can effectively prevent water vapor from entering, improve the durability of the connection part, and reduce the risk of cracking.

[0033] Furthermore, the thickness of the rubber pad 5 and the stainless steel plate 6 are both set to about 2 mm, the transverse length of the rubber pad 5 along the widened bridge flange plate 1 and the old bridge flange plate 2 is set to about 0.3 meters, and the transverse length of the stainless steel plate 6 along the widened bridge flange plate 1 and the old bridge flange plate 2 is half of the transverse length of the rubber pad 5.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A widened bridge connection device, comprising a widened bridge flange plate (1), an old bridge flange plate (2), a filling layer assembly, a pavement layer assembly, and a connection assembly, characterized in that: The widened bridge flange plate (1) is connected to an old bridge flange plate (2) on one side, a gap is formed between the widened bridge flange plate (1) and the old bridge flange plate (2), a filling layer component is provided in the gap, the filling layer component is used to improve the waterproofness of the gap between the widened bridge flange plate (1) and the old bridge flange plate (2), a pavement layer component is provided on the upper part of the widened bridge flange plate (1) and the old bridge flange plate (2), the pavement layer component is used to improve the compressive strength of the widened bridge flange plate (1) and the old bridge flange plate (2), and a connecting component is provided in the pavement layer component on the upper part of the widened bridge flange plate (1) and the old bridge flange plate (2) and is used to connect and fix the widened bridge flange plate (1) and the old bridge flange plate (2).

2. A widening bridge connection device according to claim 1, characterized in that: The widened bridge flange plate (1) is of the same height as the old bridge flange plate (2).

3. A widening bridge connection device according to claim 2, characterized in that: The pavement layer assembly comprises an ultra-high performance concrete bridge deck pavement layer (7), an ordinary concrete bridge deck pavement layer (8) and a bridge deck asphalt pavement layer (9); the ultra-high performance concrete bridge deck pavement layer (7) and the ordinary concrete bridge deck pavement layer (8) are arranged on the upper part of the widened bridge flange plate (1) and the old bridge flange plate (2); and the upper part of the ultra-high performance concrete bridge deck pavement layer (7) and the ordinary concrete bridge deck pavement layer (8) is also provided with a bridge deck asphalt pavement layer (9).

4. A widening bridge connection device according to claim 3, characterized in that: The ultra-high performance concrete bridge deck pavement layer (7) is symmetrically arranged at the upper part of the gap between the widened bridge flange plate (1) and the old bridge flange plate (2) with respect to the axis center of the widened bridge flange plate (1) and the old bridge flange plate (2).

5. The widening bridge connection device according to claim 4, characterized in that: The connection assembly comprises longitudinal reinforcing steel bars (10) and transverse reinforcing steel bars (11), wherein the longitudinal reinforcing steel bars (10) are embedded in an ultra-high performance concrete bridge deck pavement layer (7), and the transverse reinforcing steel bars (11) are respectively embedded in ordinary concrete bridge deck pavement layers (8) of the widened bridge flange plate (1) and the old bridge flange plate (2), and the transverse reinforcing steel bars (11) are symmetrically distributed in two with the widened bridge flange plate (1) and the old bridge flange plate (2) as the central axis, and the longitudinal reinforcing steel bars (10) and the transverse reinforcing steel bars (11) are connected by binding or welding.

6. The widening bridge connection device according to claim 5, characterized in that: The connection assembly further comprises a U-shaped steel bar (12), the U-shaped steel bar (12) being arranged on the upper part of the widened bridge flange plate (1) and the old bridge flange plate (2), and a total of two U-shaped steel bars (12) being provided, and the U-shaped steel bars (12) being arranged on the upper part of the widened bridge flange plate (1) and the old bridge flange plate (2) by pre-embedding and planting of steel bars between the widened bridge flange plate (1) and the old bridge flange plate (2).

7. The widening bridge connection device according to claim 6, characterized in that: The connection assembly further comprises a bridge deck steel bar (13); the transverse reinforcement steel bar (11) is divided into two layers, and a bridge deck steel bar (13) is further provided between the two layers of the transverse reinforcement steel bar (11).

8. The widening bridge connection device according to claim 7, characterized in that: The filling layer assembly comprises a polyurethane rubber caulking (3), a polyethylene foam plastic plate (4), a rubber pad (5) and a stainless steel plate (6); a polyethylene foam plastic plate (4) is provided at the lower part of the gap between the widened bridge flange plate (1) and the old bridge flange plate (2); a rubber pad (5) is provided at the upper part of the gap between the widened bridge flange plate (1) and the old bridge flange plate (2); the rubber pad (5) is located below the ultra-high performance concrete bridge deck pavement layer (7), and the rubber pad (5) is provided along the widened bridge flange plate ( The widened bridge flange plate (1) and the old bridge flange plate (2) are arranged in the longitudinal direction, and a polyurethane rubber caulking (3) is provided between the polyethylene foam plastic plate (4) and the rubber pad (5), and the polyurethane rubber caulking (3) is arranged in the gap between the widened bridge flange plate (1) and the old bridge flange plate (2). The upper part of the polyethylene foam plastic plate (4) is arranged in the longitudinal direction, and a stainless steel plate (6) is further provided at the lower part of the rubber pad (5), and the stainless steel plate (6) is arranged in the longitudinal direction of the widened bridge flange plate (1) and the old bridge flange plate (2).

9. The widening bridge connection device according to claim 8, characterized in that: The rubber pad (5) and the stainless steel plate (6) have the same thickness, and the transverse length of the stainless steel plate (6) along the widened bridge flange plate (1) and the old bridge flange plate (2) is half the transverse length of the rubber pad (5).

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