Bridge expansion device

Abstract

A beam expansion device comprises a joint crossing plate installed at the end of a first beam and a fixing plate installed at the end of a second beam, the joint crossing plate and the fixing plate can move longitudinally relatively, the fixing plate can rotate horizontally relative to the end of the second beam through a horizontal rotation coupling assembly, and the fixing plate can move transversely relative to the end of the second beam through a transverse displacement assembly. The bridge expansion device comprises a joint crossing plate installed at the end of a first beam and a fixing plate installed at the end of a second beam, the joint crossing plate and the fixing plate can move relative to the longitudinal direction, the fixing plate can horizontally rotate relative to the end of the second beam through a horizontal rotation coupling assembly, and the fixing plate can transversely move relative to the end of the second beam through a transverse displacement assembly. Flexible connection is adopted between the horizontal rotation coupling assemblies and between the transverse displacement assemblies, the horizontal rotation sliding function, the transverse bridge direction sliding function and the contraction longitudinal displacement function of the damping impact-resistant buffering bridge are achieved, and therefore the requirement for displacement in all directions of movement of the bridge is met.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint technology in bridge engineering, and in particular to a bridge expansion device. Background Technology

[0002] Bridge expansion joints are devices installed between the ends of two beams, between a beam end and an abutment, or at hinged joints of the bridge to accommodate bridge deck deformation. Bridge expansion joints are a crucial component of bridges, and their performance directly impacts traffic safety and road traffic flow. Currently, suspension bridges and cable-stayed bridges are generally preferred for long-span bridges. When using cable-stayed bridges, a floating system structure is sometimes employed for better seismic resistance; in this type of structure, the towers and piers are rigidly connected, and the beams do not have supports at the towers. During operation, bridges are subjected to vehicle loads, the bridge's own materials, temperature, and wind forces, causing contraction, horizontal rotation, and lateral sliding. Expansion joints capable of handling these movements are required at the junctions of the main bridge and approach bridges. Due to structural design requirements, some bridges require the expansion joint's fixing plate to be installed on the side of the main bridge, necessitating that the fixing plate's function mitigate these movements. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a bridge expansion joint with horizontal rotation, lateral sliding and longitudinal displacement functions at the fixed plate end, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a bridge expansion joint device, including a cross joint plate installed at the end of a first beam and a fixed plate installed at the end of a second beam, wherein the cross joint plate and the fixed plate can move relative to each other longitudinally, characterized in that: the fixed plate can rotate horizontally relative to the end of the second beam through a horizontal rotation coupling component, and the fixed plate can also move laterally relative to the end of the second beam through a lateral displacement component.

[0005] The horizontal rotation coupling assembly can have various structures. Preferably, the horizontal rotation coupling assembly includes a lower base plate, an outer track, and a coupling shaft. The lower base plate is fixed to the embedded part of the beam, the outer track is fixed to the lower base plate, and the coupling shaft rotates with the outer track. The top of the coupling shaft is connected to the bottom of the fixed plate. With this configuration, under the combined action of the outer track and the coupling shaft, the lower base plate and the fixed plate rotate relative to each other around the coupling shaft as the rotation center, and the outer track acts as the motion platform. The swing of the beam is transmitted to the lower base plate, causing the lower base plate to swing together with the beam, resulting in horizontal relative rotational sliding between the lower base plate and the fixed plate.

[0006] Further preferably, a self-lubricating friction-reducing component is provided between the outer peripheral wall of the coupling shaft and the inner wall of the outer track, and a horizontal rotation damping component is installed between the outer peripheral wall of the outer track and the lower base plate. The self-lubricating friction-reducing component is preferably made of an oil-impregnated bearing, which has the characteristics of low frictional resistance and self-lubricating properties. When the beam swings horizontally, the motion is transmitted to the outer track, and the outer track and coupling shaft generate relative motion through the self-lubricating friction-reducing component. When the beam swings horizontally, the swing process is transmitted to the horizontal rotation damping component through the lower base plate. After releasing the buffering force, the horizontal rotation damping component transmits it to the outer track. The horizontal rotation damping component is the first to bear the force, playing a buffering role and protecting the telescopic device.

[0007] To enable smooth lateral movement between the fixed plate and the base plate, the lateral displacement assembly includes a base plate and a lateral sliding guide rail. The lateral sliding guide rail is connected and fixed to the bottom of the fixed plate. A groove is formed on the base plate, and the lateral sliding guide rail is slidably disposed in the groove.

[0008] In order to enable the transverse sliding guide rail seat to move laterally synchronously with the fixed plate, a base plate is fixed to the bottom of the fixed plate, and the base plate is connected and fixed to the transverse sliding guide rail seat by connecting bolts.

[0009] To facilitate smooth longitudinal movement between the expansion joint plate and the fixed plate, a sliding plate is installed between the bottom of the base plate and the bottom of the fixed plate, with the end of the expansion joint plate resting on the sliding plate. With this configuration, during operation, when the bridge contracts due to vehicle loads, the bridge's own materials, temperature, and wind, the expansion joint plate component moves along with the sliding plate component, mitigating the longitudinal contraction of the bridge and allowing the expansion joint device to operate normally.

[0010] To protect the telescopic device during lateral sliding, a lateral sliding elastic shock absorption component is provided between the base plate and the foundation plate.

[0011] The transverse sliding guide seat and the slide groove can have various mating structures. Preferably, the slide groove is an inverted T-shaped groove, and correspondingly, the transverse sliding guide seat is an inverted T-shaped guide seat. The inverted T-shaped guide seat is connected to the inverted T-shaped groove by fasteners. Furthermore, under the action of the fasteners, the inverted T-shaped guide seat can be confined within the inverted T-shaped groove. Through the mutual movement between the two, the transverse displacement of the fixed plate and the transverse sliding guide seat is achieved.

[0012] Further preferably, lateral movement damping components are installed at both ends of the lateral sliding guide rail, one end of the lateral movement damping component abuts against the lateral sliding guide rail, and the other end of the lateral movement damping component abuts against the base plate.

[0013] The lateral movement damping assembly can have various structures. Preferably, the lateral movement damping assembly includes an inner fixed plate, a damping connecting rod, a damping block, and an outer fixed plate. The inner fixed plate is fixed to the base plate, and the outer fixed plate is fixed to the lateral sliding guide rail seat. The damping connecting rod is located between the inner fixed plate and the outer fixed plate and presses against the damping block. With this configuration, when the bridge is subjected to vehicle loads, the bridge's own materials, temperature, and wind forces, causing lateral movement, the lateral sliding is transmitted to the lower base plate, which in turn transmits it to the base plate, and then to the lateral sliding guide rail seat. The lateral movement damping assembly first generates a damping effect, buffering the generated force. The guide rail seat moves within the groove, and the lateral sliding elastic damping assembly simultaneously generates relative displacement.

[0014] Compared with the prior art, the advantages of this utility model are as follows: The bridge expansion joint device includes a cross joint plate installed at the end of the first beam and a fixed plate installed at the end of the second beam. The cross joint plate and the fixed plate can move longitudinally relative to each other. The fixed plate can rotate horizontally relative to the end of the second beam through a horizontal rotation coupling component. The fixed plate can also move laterally relative to the end of the second beam through a lateral displacement component. Furthermore, the horizontal rotation coupling component and the lateral displacement component are both flexibly connected to each other, thereby realizing the horizontal rotation sliding function, the lateral sliding function, and the longitudinal displacement function of the shock-absorbing and impact-resistant buffer bridge, thus fulfilling the requirements of all-directional displacement during the bridge's movement. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the bridge expansion joint device according to an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 Sectional view of the structure along the AA direction;

[0017] Figure 3 for Figure 1 Sectional view of the structure along the BB direction;

[0018] Figure 4 for Figure 1 An enlarged schematic diagram of section K in the middle;

[0019] Figure 5 This is a schematic diagram of the installation of the lateral movement damping component according to an embodiment of the present utility model;

[0020] Figure 6 This is a schematic diagram of the lateral movement damping component according to an embodiment of the present invention;

[0021] Figure 7 for Figure 1 MM-direction structural section view;

[0022] Figure 8This is a schematic diagram of the structure of the outer track and the horizontal rotation damping assembly according to an embodiment of the present invention;

[0023] Figure 9 This is a schematic diagram of the outer track structure according to an embodiment of the present utility model;

[0024] Figure 10 This is a schematic diagram of the structure of the bottom plate in an embodiment of the present utility model. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, the bridge expansion joint device in this embodiment includes a joint plate 1 installed at the end 101 of the first beam and a fixed plate 2 installed at the end 102 of the second beam. The joint plate 1 and the fixed plate 2 can move longitudinally relative to each other. The fixed plate 2 can rotate horizontally relative to the end 102 of the second beam through a horizontal rotation coupling component 3, and the fixed plate 2 can also move laterally relative to the end 102 of the second beam through a lateral displacement component 4. In this embodiment, the fixed plate end is installed on the main bridge side, and the joint plate end is installed on the approach bridge side. The fixed plate end provides the expansion joint device function required for the above bridge movement.

[0027] like Figure 2 , Figures 7 to 10 As shown, the horizontal rotation coupling assembly 3 of this embodiment includes a lower base plate 31, an outer track 32, and a coupling shaft 33. The lower base plate 31 is fixed to the beam embedded part 103, thus forming an integral part with the beam. In this embodiment, the beam embedded part 103 is a pre-embedded steel bar, but other pre-embedded parts such as pre-embedded steel plates can also be used. The lower base plate 31 has an installation groove 311 adapted to the outer track 32. The outer track 32 is fixed within the installation groove 311 of the lower base plate 31. The coupling shaft 33 rotates with the outer track 32, and the top of the coupling shaft 33 is connected to the bottom of the fixing plate 2. A self-lubricating friction-reducing assembly 34 is provided between the outer peripheral wall of the coupling shaft 33 and the inner wall of the outer track 32. The self-lubricating friction-reducing assembly is preferably made of an oil-impregnated bearing, which has the characteristics of low frictional resistance and self-lubricating properties. When the horizontal swing of the beam is transmitted to the outer track 32, the outer track 32 and the coupling shaft 33 generate relative movement through the self-lubricating friction-reducing assembly 34. A horizontal rotation damping component 35 is installed between the outer peripheral wall of the outer track 32 and the lower base plate 31, forming a flexible connection between the outer track 32 and the lower base plate 31. Thus, when the beam rotates horizontally, the swing process is transmitted to the horizontal rotation damping component 35 through the lower base plate 31. After the horizontal rotation damping component 35 releases the buffer force, it is transmitted to the outer track 32. The horizontal rotation damping component 35 is subjected to force first, playing a buffering role and protecting the telescopic device.

[0028] When the beam rotates horizontally, under the combined action of the outer track 32 and the coupling shaft 33, the lower base plate 31 and the fixed plate 2 rotate relative to each other with the coupling shaft 33 as the rotation center and the outer track 32 as the motion platform. The swing of the beam is transmitted to the lower base plate 31, and the lower base plate 31 swings together with the beam. There is a horizontal relative rotational sliding between the lower base plate 31 and the fixed plate 2.

[0029] In addition, a base plate 41 is installed above the lower base plate 31, and an elastic damping component 36 is installed between the lower base plate 31 and the base plate 41. When rotation occurs between the lower base plate 31 and the base plate 41, the elastic damping component 36 reduces frictional resistance and acts as a support device. Through the relative movement between the above components, when the horizontal rotational swaying motion of the beam under the action of external force is transmitted to the expansion joint, the expansion joint is neutralized through the coupling effect of its own flexible coupling shaft 33, horizontal rotation damping component 35, and elastic damping component 36, allowing the expansion joint to operate normally.

[0030] like Figure 3 and Figure 4 As shown, the lateral displacement assembly 4 in this embodiment includes a base plate 41, a lateral sliding guide rail seat 42, and a bottom plate 43. The lateral sliding guide rail seat 42 is fixedly connected to the bottom of the fixed plate 2. The base plate 41 has a groove 411, and the lateral sliding guide rail seat 42 is slidably disposed in the groove 411 and connected by fasteners 45. The bottom plate 43 is fixed to the bottom of the fixed plate 2 and located above the base plate 41. The bottom plate 43 is fixedly connected to the lateral sliding guide rail seat 42 by connecting bolts 44. A lateral sliding self-lubricating friction-reducing assembly 48 is installed on the moving surfaces of the lateral sliding guide rail seat 42 and the groove 411. Oil-impregnated bearings are preferred, which can effectively reduce frictional resistance while providing lubrication.

[0031] In this embodiment, the slide groove 411 is an inverted T-shaped groove, and correspondingly, the transverse sliding guide seat 42 is an inverted T-shaped guide seat. Besides this, the slide groove 411 and the transverse sliding guide seat 42 can also adopt other different types, as long as it ensures that the transverse sliding guide seat 42 is confined within the slide groove 411 and can slide laterally. When installing the inverted T-shaped guide seat, it is inserted into the inverted T-shaped groove from the side, the relative positions are adjusted, the transverse sliding self-lubricating anti-friction component 48 is adjusted, and then the fastener 45 is fixed. Through the mutual movement between the inverted T-shaped guide seat and the inverted T-shaped groove, the transverse displacement of the fixed plate 2 and the base plate 41 is achieved.

[0032] In addition, a transverse sliding elastic damping component 46 is installed between the base plate 43 and the foundation plate 41. When the base plate 43 and the foundation plate 41 undergo transverse relative displacement, the transverse sliding elastic damping component 46 can reduce frictional resistance and serve as a support device.

[0033] like Figure 5and Figure 6 As shown, in this embodiment, lateral movement damping components 47 are installed at both ends of the lateral sliding guide rail 42. One end of the lateral movement damping component 47 abuts against the lateral sliding guide rail 42, and the other end of the lateral movement damping component 47 abuts against the base plate 41. Specifically, the lateral movement damping component 47 includes an inner fixing plate 471, a damping connecting rod 472, a damping block 473, and an outer fixing plate 474. The inner fixing plate 471 is fixed on the base plate 41, and the outer fixing plate 474 is fixed on the lateral sliding guide rail 42. The damping connecting rod 472 is disposed between the inner fixing plate 471 and the outer fixing plate 474 and presses against the damping block 473.

[0034] When the bridge is subjected to vehicle loads, its own materials, temperature, and wind forces, causing lateral movement, the lateral sliding is transmitted to the lower base plate 31, then to the foundation plate 41, and finally to the lateral sliding guide rail 42. The lateral movement damping component 47 first provides damping, buffering the generated force. The lateral sliding guide rail 42 moves within the groove 411, while the lateral sliding elastic damping component 46 simultaneously generates relative displacement, reducing frictional resistance. When the bridge experiences lateral displacement under external forces, the connections between the lateral sliding guide rail 42, the lateral sliding elastic damping component 46, the foundation plate 41, and the lower base plate 31 of the expansion joint device are flexible. Through the lateral sliding coupling function, the lateral movement of the bridge is mitigated, allowing the expansion joint device to operate normally.

[0035] like Figure 1 As shown, a sliding plate 5 is installed between the bottom of the base plate 43 and the bottom of the fixed plate 2. One end of the cross-joint plate 1 is installed on the approach bridge side of the bridge structural joint, and the other end crosses the structural joint and is installed on the sliding plate 5. The sliding plate 5 is made of stainless steel. The sliding plate 5, the shock absorption component, and the base plate 43 together constitute the longitudinal displacement sliding plate assembly. During the operation of the bridge project, when the bridge contracts due to vehicle loads, the bridge's own materials, temperature, and wind, the cross-joint plate 1 moves accordingly on the longitudinal displacement sliding plate assembly, mitigating the longitudinal contraction of the bridge and allowing the expansion joint to operate normally.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, various modifications or improvements can be made to the present utility model without departing from the principle of the present utility model. For example, the horizontal rotation damping component is not limited to the structure in this embodiment, the lateral movement damping component is not limited to the structure in this embodiment, and other structures with damping effects such as gas springs can also be used. For another example, according to the bridge design requirements, the fixed plate end is not limited to being installed on the main bridge side, and the cross joint plate end is not limited to being installed on the approach bridge side. These are all considered to be within the protection scope of the present utility model.

Claims

1. A bridge expansion joint, comprising a cross joint plate (1) installed at the end of a first beam (101) and a fixing plate (2) installed at the end of a second beam (102), wherein the cross joint plate (1) and the fixing plate (2) are capable of longitudinal movement relative to each other, characterized in that: The fixed plate (2) can rotate horizontally relative to the end of the second beam (102) via the horizontal rotation coupling component (3), and the fixed plate (2) can also move laterally relative to the end of the second beam (102) via the lateral displacement component (4).

2. The bridge expansion joint according to claim 1, characterized in that: The horizontal rotation coupling assembly (3) includes a lower base plate (31), an outer track (32) and a coupling shaft (33). The lower base plate (31) is fixed on the embedded part (103) of the beam. The outer track (32) is fixed on the lower base plate (31). The coupling shaft (33) is rotatably engaged with the outer track (32). The top of the coupling shaft (33) is connected to the bottom of the fixing plate (2).

3. The bridge expansion joint according to claim 2, characterized in that: A self-lubricating friction-reducing component (34) is provided between the outer peripheral wall of the coupling shaft (33) and the inner wall of the outer track (32), and a horizontal rotation damping component (35) is installed between the outer peripheral wall of the outer track (32) and the lower base plate (31).

4. The bridge expansion joint according to any one of claims 1 to 3, characterized in that: The lateral displacement component (4) includes a base plate (41) and a lateral sliding guide seat (42). The lateral sliding guide seat (42) is connected and fixed to the bottom of the fixed plate (2). The base plate (41) has a groove (411), and the lateral sliding guide seat (42) is slidably disposed in the groove (411).

5. The bridge expansion joint according to claim 4, characterized in that: The bottom of the fixing plate (2) is fixed with a base plate (43), and the base plate (43) is connected and fixed to the transverse sliding guide rail seat (42) by connecting bolts (44).

6. The bridge expansion joint according to claim 5, characterized in that: A sliding plate (5) is installed between the bottom of the base plate (43) and the bottom of the fixing plate (2), and the end of the cross-slot plate (1) is placed on the sliding plate (5).

7. The bridge expansion joint according to claim 5, characterized in that: A transverse sliding elastic damping component (46) is provided between the base plate (43) and the foundation plate (41).

8. The bridge expansion joint according to claim 4, characterized in that: The groove (411) is an inverted T-shaped groove, and correspondingly, the transverse sliding guide seat (42) is an inverted T-shaped guide seat. The inverted T-shaped guide seat is connected to the inverted T-shaped groove by fasteners (45).

9. The bridge expansion joint according to claim 4, characterized in that: The transverse sliding guide rail (42) is equipped with transverse movement damping components (47) at both ends. One end of the transverse movement damping component (47) abuts against the transverse sliding guide rail (42), and the other end of the transverse movement damping component (47) abuts against the base plate (41).

10. The bridge expansion joint according to claim 9, characterized in that: The lateral movement damping assembly (47) includes an inner fixed plate (471), a damping link (472), a damping block (473), and an outer fixed plate (474). The inner fixed plate (471) is fixed on the base plate (41), and the outer fixed plate (474) is fixed on the lateral sliding guide rail seat (42). The damping link (472) is located between the inner fixed plate (471) and the outer fixed plate (474) and presses against the damping block (473).

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