Bridge support structure

Abstract

The utility model discloses a bridge support structure, which is characterized in that a friction transfer layer is arranged between a support top plate and a force transfer plate, so that rigid resistance between a connecting base and the support top plate is avoided when a bridge connecting part horizontally displaces, and meanwhile, a rubber layer arranged in a rubber layer groove of the connecting base is connected with the force transfer plate; redundant horizontal force and vertical unbalanced force are transmitted into the lower rubber layer through the force transmission plate, stress can be well dispersed into the rubber layer through the rubber limiting part, relative displacement between the force transmission plate and the rubber layer can be effectively reduced, meanwhile, the size of stress on the peripheral rubber layer is reduced, and the service life of the rubber layer is prolonged. The bearing can effectively deform after bearing uneven vertical loads, the service life of the bearing is prolonged, force can be well dispersed into the rubber layer through the conical rubber limiting part, meanwhile, the contact area between the bearing and the rubber layer is increased, and therefore the rubber layer can be fully utilized for horizontal displacement load unloading.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge supports, and in particular relates to a bridge support structure. Background Art

[0002] Bridge bearings, as the foundation of bridge support, play a key role in bridges. In order to support the vertical loads generated by the dead load and live load of the bridge, rubber bridge bearings are currently used, which can reliably transmit the pressure of the upper structure to the pier; however, the rubber bridge bearings currently used are prone to cracking, voiding, excessive shear deformation, and string movement during use.

[0003] The cracking of the current rubber bridge bearing structure is mainly due to uneven force on the bearing, and the bearing is locally subjected to excessive concentrated load, resulting in overload rupture; the aging of the surface is mainly due to weathering, and the surface of some bearings cracks and falls off; the hollowing is due to uneven force on the bearings under the beam after the beam body is deformed, and local bias causes hollowing; the shear deformation of the bearing mainly occurs in the sliding bearing, and the sliding bearings that experience shear deformation are not coated with silicone grease. The failure to apply silicone grease results in excessive friction between the bearing and the upper steel plate. When the movable end of the beam body is displaced, the top surface of the bearing is driven to move, while the bottom surface of the bearing cannot move, forming shear deformation; the majority of bearing movement occurs in the sliding bearing, and the prefabricated beam moves as a whole after being horizontally connected. The main reason is that the construction dynamic load such as vehicles and beam transporters causes the beam body to move. Therefore, the currently used rubber bridge bearing structure cannot guarantee the stability and controllability of the bridge. Utility Model Content

[0004] The utility model aims to provide a bridge support structure to overcome the problems of cracking, voiding and shear deformation that are easy to occur in the existing rubber support structure.

[0005] A bridge bearing structure includes a connecting base, a force transmission plate and a bearing top plate, a friction transmission layer is arranged between the bearing top plate and the force transmission plate, a rubber layer groove is arranged on the connecting base, a rubber layer is arranged in the rubber layer groove of the connecting base, the lower end of the force transmission plate is connected to the rubber layer through a rubber limiting part, the lower end of the connecting base is fixedly connected to the bearing pad stone, and the upper end of the bearing top plate is connected and fixed to the bridge connecting part.

[0006] Preferably, the friction transmission layer is made of modified polytetrafluoroethylene plate.

[0007] Preferably, the support top plate is fixedly connected to the bridge connection part through a fixing bolt body.

[0008] Preferably, the fixing bolt body adopts a prefabricated bolt structure or an expansion bolt structure.

[0009] Preferably, a limiting column in contact with the inner wall of the rubber limiting portion is provided at the bottom of the force transmission plate.

[0010] Preferably, the rubber limiting part adopts a conical structure, and the lower end of the rubber limiting part is embedded in the rubber layer; a limiting hole is arranged on the rubber limiting part, and the limiting column at the bottom of the force transmission plate is located in the limiting hole of the rubber limiting part.

[0011] Preferably, the middle of the rubber limiting portion is a through-hole structure, and the limiting column at the bottom of the force transmission plate is located in the through-hole structure.

[0012] Preferably, the rubber limiting portion adopts two nested conical structures.

[0013] Preferably, an auxiliary limiting portion is provided in the connecting base, the auxiliary limiting portion adopts a conical structure, and the auxiliary limiting portion is nested in the bottom of the rubber limiting portion.

[0014] Preferably, the rubber limiting part adopts a solid conical structure, the large end of the cone is located at the bottom of the connecting base, a limiting groove is arranged on the upper part of the rubber limiting part, and the limiting column at the lower end of the force transmission plate is located in the limiting groove on the upper part of the rubber limiting part.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model provides a bridge bearing structure, which avoids rigid resistance between a connecting base and a bearing top plate when a bridge connection part undergoes horizontal displacement by means of a friction transfer layer arranged between the bearing top plate and the force transfer plate, and simultaneously utilizes a rubber layer arranged in a rubber layer groove of the connecting base to be connected with the force transfer plate, and transmits excess horizontal force and vertical unbalanced force to a lower rubber layer through the force transfer plate. The rubber limiting part can well disperse stress in the rubber layer, and can effectively reduce the relative displacement between the force transfer plate and the rubber layer, and at the same time reduce the force on the surrounding rubber layers, so that the bearing can be effectively deformed after being subjected to uneven vertical loads, thereby increasing the bearing life.

[0017] Preferably, the conical rubber limiting portion can effectively disperse the force into the rubber layer, while increasing the contact area with the rubber layer, so that the rubber layer can be fully utilized to unload the horizontal displacement load.

[0018] The present application adopts two nested rubber limiters, which can effectively concentrate the vertical force of the rubber structure, so that the vertical force is concentrated inside the central truncated cone-shaped structure formed by the two rubber limiters and the rubber inside. At the same time, due to this structure, the rubber is in a three-phase stress state, which can improve the bearing capacity. At the same time, because the vertical force is concentrated in the center, the vertical force on the rubber near the force transmission plate will be greatly reduced, so that its deformation capacity can be fully exerted, so that the support can be effectively deformed under bias, which is not available in other rubber supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the bridge support structure in an embodiment of the utility model.

[0020] Figure 2 It is a cross-sectional view of the bridge support structure in an embodiment of the utility model.

[0021] Figure 3 It is a schematic diagram of the structure of the fixing bolt body in the embodiment of the utility model.

[0022] Figure 4 It is a schematic diagram of the support top plate installation structure in the embodiment of the utility model.

[0023] Figure 5 It is a schematic diagram of the structure of the force transmission plate in the embodiment of the utility model.

[0024] Figure 6 It is a schematic diagram of the structure of the rubber limiting part in the embodiment of the utility model.

[0025] Figure 7 It is a schematic diagram of the connecting base structure in an embodiment of the utility model.

[0026] Figure 8 It is a cross-sectional view of the bridge support installation structure in an embodiment of the utility model.

[0027] In the figure, 1-fixing bolt body; 2-support top plate; 3-friction transmission layer; 4-force transmission plate; 5-rubber limiter; 6-rubber layer; 7-connecting base; 8-trapezoidal iron ingot; 9-ring-shaped rubber. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] like Figure 1 As shown, the utility model provides a bridge bearing structure, including a connecting base 7, a force transmission plate 4 and a bearing top plate 2, a friction transmission layer 3 is arranged between the bearing top plate 2 and the force transmission plate 4, a rubber layer groove is arranged on the connecting base 7, a rubber layer 6 is arranged in the rubber layer groove of the connecting base 7, the lower end of the force transmission plate 4 is connected to the rubber layer 6 through a rubber limiting portion 5, the lower end of the connecting base 7 is fixedly connected to the bearing pad stone, the bearing top plate 2 is used to be connected and fixed to the bridge connecting portion, the connecting base 7, the force transmission plate 4 and the bearing top plate 2 form a bearing structure between the bearing pad stone and the bridge connecting portion, and the present application utilizes the bearing top plate 2 and the force transmission plate A friction transfer layer 3 is arranged between 4 to avoid rigid resistance between the connecting base 7 and the bearing top plate 2 when the bridge connection occurs horizontal displacement. At the same time, the rubber layer 6 arranged in the rubber layer groove of the connecting base 7 is connected to the force transfer plate 4, and the excess horizontal force and vertical unbalanced force are transferred to the lower rubber layer 6 through the force transfer plate 4. The rubber limiting part 5 can well disperse the stress to the rubber layer, which can effectively reduce the relative displacement between the force transfer plate and the rubber layer 6, and at the same time reduce the force on the surrounding rubber layers 6, so that the bearing can be effectively deformed after being subjected to uneven vertical loads to increase the bearing life.

[0031] The friction transfer layer 3 is made of modified polytetrafluoroethylene plate, which can effectively reduce frictional resistance. When relative displacement occurs between the bridge connection part and the support pad stone, the support top plate 2 and the force transfer plate 4 are used to generate displacement through the friction transfer layer 3, and then the force transfer plate 4 is used to transfer the force to the rubber layer in the connecting base 7, thereby achieving the purpose of limiting displacement.

[0032] Bolt holes are provided on the support top plate 2, which are used to fix the support top plate 2 to the bridge connection part through the fixing bolt body 1. The fixing bolt body 1 adopts a prefabricated bolt structure or an expansion bolt structure.

[0033] like Figure 2 , Figure 3 , Figure 4As shown, an expansion bolt structure is adopted, specifically including a sleeve 1-1, a gasket 1-2, a nut 1-3 and a screw rod 1-4. The sleeve 1-1 and the screw rod 1-4 are prefabricated and buried at the lower end of the bridge connection part, and then pass through the bolt hole of the support top plate 2 and are fastened by the nut 1-3. A gasket 1-2 is arranged between the nut 1-3 and the support top plate 2, and the support top plate 2 is fixed to the bridge connection part by the expansion bolt, which has the advantages of simple structure and convenient installation.

[0034] like Figure 5 As shown, a limiting column 4-1 is arranged at the bottom of the force transmission plate 4, and the side wall of the limiting column 4-1 can contact the inner wall of the rubber limiting part 5, and can disperse the horizontal force and vertical unbalanced force received by the force transmission plate 4 into the rubber layer; specifically, a plurality of limiting columns 4-1 are arranged at the bottom of the force transmission plate 4, and the plurality of limiting columns can transfer the stress to the rubber layer according to a certain distribution, and can effectively reduce the relative displacement between the force transmission plate and the lower rubber structure.

[0035] The force transmission plate 4 and the limiting column 4 - 1 are both made of steel.

[0036] The rubber limiting part 5 adopts a conical structure, and the lower end of the rubber limiting part 5 is embedded in the rubber layer 6; a limiting hole is arranged on the rubber limiting part 5, and the limiting column 4-1 at the bottom of the force transmission plate 4 is located in the limiting hole of the rubber limiting part 5; the conical rubber limiting part can well disperse the force into the rubber layer, and at the same time increase the contact area with the rubber layer, so that the rubber layer can be fully utilized for horizontal displacement load unloading.

[0037] Specifically, in one embodiment of the present application, the middle of the rubber limiting portion 5 can be set as a through hole structure, the limiting column 4-1 at the bottom of the force transmission plate 4 is located in the through hole structure, and the limiting column 4-1 is initially spaced apart from the inside of the rubber limiting portion 5, and the middle is filled with a rubber layer. When subjected to a small range of displacement, the force transmission plate 4 can avoid rigid contact with the rubber limiting portion 5, and directly rely on the rubber layer to bear the load.

[0038] In another embodiment of the present application, Figure 6As shown, the rubber limiter 5 adopts a double-layer structure, that is, two nested conical structures are adopted, and an intermediate limiter column and an outer ring limiter column are arranged at the bottom of the force transmission plate 4, which can respectively contact the two nested conical structures when subjected to horizontal displacement. The present application adopts two nested rubber limiters 5, which can effectively concentrate the vertical force of the rubber structure, so that the vertical force is concentrated inside the central truncated cone-shaped structure formed by the two rubber limiters 5 and the rubber inside. At the same time, due to this structure, the rubber is in a three-phase stress state, which can improve the bearing capacity. At the same time, because the vertical force is concentrated in the center position, the vertical force on the rubber near the force transmission plate will be greatly reduced, so that its deformation ability can be fully exerted, so that the support can be effectively deformed under bias, which is not available in other rubber supports.

[0039] The rubber layer 6 of the present application is filled inside the connecting base 7 , and its characteristics can be fully utilized by filling different types of rubber around the rubber limiting portion 5 .

[0040] like Figure 7 As shown, in one embodiment of the present application, an auxiliary limiting portion 7-1 is provided in the connecting base 7. The auxiliary limiting portion 7-1 adopts a conical structure. The auxiliary limiting portion 7-1 is nested in the bottom of the rubber limiting portion 5. The auxiliary limiting portion 7-1 cooperates with the rubber limiting portion 5 to further concentrate the rubber layer, thereby increasing the load-bearing capacity of the rubber layer. By utilizing the double-layer limiting portion structure, the rubber layer can be effectively limited, deformed under unbalanced vertical force, and provide a reaction force to generate a bending moment.

[0041] like Figure 8 As shown, in another embodiment of the present application, the rubber limiter 5 adopts a solid conical structure, the large end of the conical end is located at the bottom of the connection base 7, a limit groove is arranged on the upper part of the rubber limiter 5, the limit column 4-1 at the lower end of the force transmission plate 4 is located in the upper limit groove of the rubber limiter 5, and the outer ring of the rubber limiter 5 is filled with a rubber layer, and a larger load can be achieved by using the rubber limiter 5. The lower end of the connection base 7 is fixed to the support pad stone by an expansion bolt.

[0042] The utility model uses the structural design of the force transmission plate 4, the rubber limiter 5 and the support top plate 2 so that the support top plate 2 mainly bears the vertical load, while the rubber limiter 5 mainly provides a reaction force after deformation to ensure the stability of the bridge, and secondarily provides a support reaction force. The pot-type rubber bearing of the utility model utilizes a specially constructed rigid plate, which can not only increase the bearing capacity of the pot-type rubber bearing, but also concentrate the vertical force through a special structure, reducing the force on the surrounding rubber, so that the bearing can be effectively deformed after bearing uneven vertical loads to increase the life of the bearing. The utility model can smoothly transmit vertical force, and the utility model can effectively avoid the phenomenon of rubber cracking, wear and shear damage, and has high construction quality. The utility model has a wide range of applications, and is not only suitable for bridges with large horizontal displacement of the beam body and biased deformation requirements, but also suitable for areas with large bearing capacity requirements and long service life requirements.

Claims

1. A bridge support structure, characterized in that: The invention comprises a connecting base (7), a force transmission plate (4) and a support top plate (2); a friction transmission layer (3) is arranged between the support top plate (2) and the force transmission plate (4); a rubber layer groove is arranged on the connecting base (7); a rubber layer (6) is arranged in the rubber layer groove of the connecting base (7); the lower end of the force transmission plate (4) is connected to the rubber layer (6) through a rubber limiting part (5); the lower end of the connecting base (7) is fixedly connected to the support cushion stone; and the upper end of the support top plate (2) is connected and fixed to the bridge connection part.

2. A bridge support structure according to claim 1, characterized in that: The friction transmission layer (3) is made of modified polytetrafluoroethylene plate.

3. A bridge support structure according to claim 1, characterized in that: The support top plate (2) is fixedly connected to the bridge connection part via a fixing bolt body (1).

4. A bridge support structure according to claim 3, characterized in that: The fixing bolt body (1) adopts a prefabricated bolt structure or an expansion bolt structure.

5. The bridge support structure according to claim 1, characterized in that: A limiting column (4-1) in contact with the inner wall of the rubber limiting portion (5) is arranged at the bottom of the force transmission plate (4).

6. A bridge support structure according to claim 5, characterized in that: The rubber limiting part (5) adopts a conical structure, and the lower end of the rubber limiting part (5) is embedded in the rubber layer (6); a limiting hole is provided on the rubber limiting part (5), and the limiting column (4-1) at the bottom of the force transmission plate (4) is located in the limiting hole of the rubber limiting part (5).

7. A bridge support structure according to claim 6, characterized in that: The middle of the rubber limiting part (5) is a through-hole structure, and the limiting column (4-1) at the bottom of the force transmission plate (4) is located in the through-hole structure.

8. A bridge support structure according to claim 6, characterized in that: The rubber limiting portion (5) adopts two nested conical structures.

9. A bridge support structure according to claim 6, characterized in that: An auxiliary limiting portion (7-1) is arranged in the connection base (7); the auxiliary limiting portion (7-1) adopts a conical structure, and the auxiliary limiting portion (7-1) is nested in the bottom of the rubber limiting portion (5).

10. A bridge support structure according to claim 5, characterized in that: The rubber limiting part (5) adopts a solid conical structure, the large end of the cone is located at the bottom of the connection base (7), a limiting groove is arranged at the top of the rubber limiting part (5), and a limiting column (4-1) at the lower end of the force transmission plate (4) is located in the limiting groove at the top of the rubber limiting part (5).

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