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] The invention relates to the technical field of expansion joints in bridge engineering, and in particular to a bridge expansion device. Background Art

[0002] Bridge expansion device refers to the expansion device usually installed between the two beam ends, between the beam end and the abutment, or at the hinged position of the bridge to meet the requirements of bridge deck deformation. Bridge expansion device is an important part of the bridge. The performance of the expansion device directly affects the safety of driving and the smoothness of the bridge road. At present, the construction of large-span bridges generally prefers suspension bridges and cable-stayed bridge structures. When using the cable-stayed bridge structure, in order to have better seismic resistance, the bridge structure adopts a floating system structure. In this structure, the tower and pier are consolidated, and the beam is not supported at the tower. During the operation of the bridge project, the bridge is subject to vehicle loads, the bridge's own materials, temperature and wind, etc., causing the bridge to shrink, rotate horizontally, slide horizontally, and other movements. At the location where the main bridge and the approach bridge are connected, a expansion device with the function of handling these movements needs to be installed. Due to the requirements of the design structure of some bridges, the fixed plate end of the expansion device needs to be installed on the main bridge side, so the fixed plate end of the expansion device needs to have the function of resolving these movements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a bridge expansion device with horizontal rotation, lateral sliding and longitudinal displacement functions at the fixed plate end in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a bridge expansion device, including a span plate installed at the end of a first beam and a fixed plate installed at the end of a second beam, the span plate and the fixed plate can move relative to each other longitudinally, and is characterized in that: the fixed plate can rotate horizontally relative to the end of the second beam through a horizontal rotation coupling assembly, and the fixed plate can also move laterally relative to the end of the second beam through a lateral displacement assembly.

[0005] The horizontal rotation coupling assembly can have a variety of 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 on the embedded part of the beam body, the outer track is fixed on the lower base plate, the coupling shaft is rotationally matched with the outer track, and the top of the coupling shaft is connected to the bottom of the fixed plate. In this way, under the joint action of the outer track and the coupling shaft, the lower base plate and the fixed plate have horizontal relative rotation with the coupling shaft as the rotation center and the outer track as the motion platform. The swing of the beam body is transmitted to the lower base plate, and the lower base plate swings together with the beam body, and there is horizontal relative rotation and sliding between the lower base plate and the fixed plate.

[0006] Further preferably, a self-lubricating and 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 bottom plate. The preferred material of the self-lubricating and friction-reducing component is an oil-impregnated bearing, which has the characteristics of small frictional resistance and self-lubricating performance. When the horizontal swing of the beam body is transmitted to the outer track, relative movement is generated between the outer track and the coupling shaft through the self-lubricating and friction-reducing component; when the beam body generates a horizontal swing, the swing process is transmitted to the horizontal rotation damping component through the lower bottom plate. After the horizontal rotation damping component releases the buffering force, it is transmitted to the outer track. The horizontal rotation damping component is stressed first and plays a buffering role to protect the expansion device.

[0007] In order to enable the transverse movement between the fixed plate and the base plate to occur smoothly, the transverse displacement component includes a base plate and a transverse sliding guide rail seat. The transverse sliding guide rail seat is fixedly connected to the bottom of the fixed plate. A chute is formed on the base plate, and the transverse sliding guide rail seat is slidably arranged in the chute.

[0008] In order to enable the transverse sliding guide rail seat to move transversely synchronously with the fixed plate, a bottom plate is fixed to the bottom of the fixed plate, and the bottom plate is fixedly connected to the transverse sliding guide rail seat through a connecting bolt.

[0009] In order to enable the crack-crossing plate and the fixed plate to move longitudinally smoothly, a sliding plate is installed between the bottom plate and the bottom of the fixed plate, and the end of the crack-crossing plate is placed on the sliding plate. With such a setting, during the operation of the project, under the action of vehicle loads, the bridge's own materials, temperature, wind force, etc., when the bridge undergoes shrinkage movement, the crack-crossing plate component moves along with the sliding plate component, resolving the longitudinal shrinkage movement of the bridge and enabling the expansion device to operate normally.

[0010] In order to protect the expansion device during the transverse sliding process, a transverse sliding elastic shock-absorbing component is provided between the bottom plate and the base plate.

[0011] The transverse sliding guide rail seat and the chute can have various matching structures. Preferably, the chute is an inverted T-shaped groove, and correspondingly, the transverse sliding guide rail seat is an inverted T-shaped guide rail seat. The inverted T-shaped guide rail seat is connected in the inverted T-shaped groove through a fastener. Additionally, under the action of the fastener, the inverted T-shaped guide rail seat can be limited in the inverted T-shaped groove, and through the relative movement between the two, the transverse displacement of the fixed plate and the transverse sliding guide rail seat is achieved.

[0012] Further preferably, transverse movement damping components are installed at both ends of the transverse sliding guide rail seat. One end of the transverse movement damping component abuts against the transverse sliding guide rail seat, and the other end of the transverse 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 fixing plate, a damping link, a damping block, and an outer fixing plate. The inner fixing plate is fixed on the base plate, the outer fixing plate is fixed on the lateral sliding guide rail seat, and the damping link is arranged between the inner fixing plate and the outer fixing plate and presses the damping block. With such an arrangement, when the bridge is subjected to vehicle loads, the bridge's own materials, temperature, wind forces, etc., causing the bridge to move transversely, the lateral sliding is transmitted to the lower bottom plate, the lower bottom plate is transmitted 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 in the chute, and the lateral sliding elastic shock-absorbing assembly simultaneously generates a relative displacement.

[0014] Compared with the prior art, the advantages of the present invention are as follows: The bridge expansion device includes a gap-crossing plate installed at the end of the first beam and a fixing plate installed at the end of the second beam. The gap-crossing plate and the fixing plate can move relatively longitudinally. 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 also move laterally relative to the end of the second beam through a lateral displacement assembly. Moreover, by using flexible connections between the horizontal rotation coupling assemblies and between the lateral displacement assemblies, the functions of shock absorption and impact resistance for buffering the horizontal rotation and sliding of the bridge, shock absorption and impact resistance for buffering the transverse sliding of the bridge, and contraction of the longitudinal displacement are realized, thereby meeting the requirements of various displacements in the various movements of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 is Figure 1 a sectional view taken along line A-A in

[0017] Figure 3 is Figure 1 a sectional view taken along line B-B in

[0018] Figure 4 is Figure 1 an enlarged schematic view of part K in

[0019] Figure 5 is an installation schematic diagram of the lateral movement damping assembly according to an embodiment of the present invention;

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

[0021] Figure 7 is Figure 1 a sectional view taken along line M-M in

[0022] Figure 8Schematic diagram of the outer track and the horizontal rotation damping assembly according to an embodiment of the present invention;

[0023] Figure 9 Schematic diagram of the outer track according to an embodiment of the present invention;

[0024] Figure 10 Schematic diagram of the lower bottom plate according to an embodiment of the present invention. Detailed implementation manners

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

[0026] As Figure 1 shown, the bridge expansion device of this embodiment includes a gap crossing 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 gap crossing 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 assembly 3. The fixed plate 2 can also move laterally relative to the end 102 of the second beam through a lateral displacement assembly 4. In this embodiment, the fixed plate end is installed on the main bridge side, and the gap crossing plate end is installed on the approach bridge side. The fixed plate end provides the functions of the expansion device required for the above bridge movements.

[0027] As Figure 2 、 Figures 7 to 10 shown, the horizontal rotation coupling assembly 3 of this embodiment includes a lower bottom plate 31, an outer track 32 and a coupling shaft 33. Among them, the lower bottom plate 31 is fixed on the beam embedded part 103, so as to form an integral body with the beam. The beam embedded part 103 in this embodiment is embedded steel bars, and other embedded parts such as embedded steel plates can also be used. An installation groove 311 adapted to the outer track 32 is formed on the lower bottom plate 31. The outer track 32 is fixed in the installation groove 311 of the lower bottom plate 31. The coupling shaft 33 is rotationally matched with the outer track 32, and the top of the coupling shaft 33 is connected to the bottom of the fixed plate 2. A self-lubricating anti-friction assembly 34 is provided between the outer peripheral wall of the coupling shaft 33 and the inner wall of the outer track 32. The preferred material of the self-lubricating anti-friction assembly is an oil-impregnated bearing, which has the characteristics of small frictional resistance and self-lubricating performance. When the horizontal swing of the beam is transmitted to the outer track 32, relative movement is generated between the outer track 32 and the coupling shaft 33 through the self-lubricating anti-friction assembly 34. A horizontal rotation damping assembly 35 is installed between the outer peripheral wall of the outer track 32 and the lower bottom plate 31, and a flexible connection is formed between the outer track 32 and the lower bottom plate 31. Thus, when the beam generates a horizontal rotational swing, the swing process is transmitted to the horizontal rotation damping assembly 35 through the lower bottom plate 31. After the horizontal rotation damping assembly 35 releases the buffering force, it is transmitted to the outer track 32. The horizontal rotation damping assembly 35 is stressed first and plays a buffering role to protect the expansion device.

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

[0029] In addition, a base plate 41 is installed above the lower bottom plate 31, and an elastic shock-absorbing component 36 is installed between the lower bottom plate 31 and the base plate 41. When rotation occurs between the lower bottom plate 31 and the base plate 41, the elastic shock-absorbing component 36 plays a role in reducing frictional resistance and supporting the device. Through the relative movement between the above components, when the horizontal rotational swing movement generated by the beam body under the action of an external force is transmitted to the expansion device, the expansion device is resolved through the coupling action of the coupling shaft 33, the horizontal rotation damping component 35, and the elastic shock-absorbing component 36 with its flexible connection, enabling the expansion device to operate normally.

[0030] As Figure 3 and Figure 4 shown, the lateral displacement component 4 of 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. A sliding groove 411 is formed on the base plate 41, and the lateral sliding guide rail seat 42 is slidably arranged in the sliding groove 411 and connected by a fastener 45; the bottom plate 43 is fixed to the bottom of the fixed plate 2 and is located above the base plate 41, and the bottom plate 43 is fixedly connected to the lateral sliding guide rail seat 42 through a connecting bolt 44. A lateral sliding self-lubricating and anti-friction component 48 is installed on the moving surfaces of the lateral sliding guide rail seat 42 and the sliding groove 411. An oil-impregnated bearing is preferably selected, which can play a lubricating function while effectively reducing frictional resistance.

[0031] The sliding groove 411 of this embodiment is an inverted T-shaped groove. Correspondingly, the lateral sliding guide rail seat 42 is an inverted T-shaped guide rail seat. In addition, the sliding groove 411 and the lateral sliding guide rail seat 42 can also adopt other different forms, as long as it is ensured that the lateral sliding guide rail seat 42 is limited in the sliding groove 411 and can slide laterally. When installing the inverted T-shaped guide rail seat, it is inserted into the inverted T-shaped groove from the side, the mutual position is adjusted, the lateral sliding self-lubricating and anti-friction component 48 is adjusted, and then the fastener 45 is fixed. Through the mutual movement between the inverted T-shaped guide rail seat and the inverted T-shaped groove, the lateral displacement between the fixed plate 2 and the base plate 41 is realized.

[0032] In addition, a lateral sliding elastic shock-absorbing component 46 is installed between the bottom plate 43 and the base plate 41. When there is a lateral relative displacement between the bottom plate 43 and the base plate 41, the lateral sliding elastic shock-absorbing component 46 can play a role in reducing frictional resistance and supporting the device.

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

[0034] When the bridge is subjected to vehicle loads, the bridge's own materials, temperature, wind force, etc., causing the bridge to move transversely, the transverse sliding is transmitted to the lower bottom plate 31, the lower bottom plate 31 is transmitted to the base plate 41, and then transmitted to the transverse sliding guide rail base 42. The transverse movement damping component 47 first generates a damping effect to buffer the generated force. The transverse sliding guide rail base 42 moves in the chute 411, and the transverse sliding elastic shock absorption component 46 simultaneously generates a relative displacement to reduce the movement friction resistance. When the bridge generates a transverse displacement movement under the action of external forces, the connections between components such as the transverse sliding guide rail base 42, the transverse sliding elastic shock absorption component 46, the base plate 41, and the lower bottom plate 31 of the expansion joint device are flexible connections. Through the transverse sliding coupling function, the transverse movement of the bridge is resolved, enabling the expansion joint device to operate normally.

[0035] As Figure 1 shown, a sliding plate 5 is installed between the bottom plate 43 and the bottom of the fixing plate 2. One end of the joint-span plate 1 is installed on the approach bridge side of the bridge structure joint, and the other end is installed on the sliding plate 5 after crossing the structure joint. The sliding plate 5 is made of a stainless steel sliding plate. The sliding plate 5, the shock absorption component, and the bottom plate 43 together form a longitudinal displacement sliding plate assembly. During the operation of the bridge project, when it is subjected to vehicle loads, the bridge's own materials, temperature, wind force, etc., causing the bridge to contract, the joint-span plate 1 moves along with the longitudinal displacement sliding plate assembly, resolving the longitudinal contraction movement of the bridge, enabling the expansion joint device to operate normally.

[0036] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, various modifications or improvements can be made to the present invention. For example, the horizontal rotation damping component is not limited to the structure in this embodiment, and the transverse movement damping component is not limited to the structure in this embodiment. Other structures with damping effects such as gas springs can also be used. Also, according to the requirements of the bridge design structure, the fixing plate end is not limited to being installed on the main bridge side, and the joint-span plate end is not limited to being installed on the approach bridge side. These are all regarded as within the protection scope of the present invention.

Claims

1. A bridge expansion device, comprising a spanning plate (1) installed at a first beam end (101) and a fixing plate (2) installed at a second beam end (102), wherein the spanning plate (1) and the fixing plate (2) can move longitudinally relative to each other, and characterized in that: The fixing plate (2) can be horizontally rotated relative to the second beam end (102) via a horizontal rotation coupling assembly (3), and the fixing plate (2) can also be horizontally moved relative to the second beam end (102) via a horizontal displacement assembly (4).

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

3. The bridge expansion device according to claim 2, characterized in that: A self-lubricating friction reduction 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 device according to any one of claims 1 to 3, characterized in that: The lateral displacement assembly (4) comprises a base plate (41) and a lateral sliding guide rail seat (42); the lateral sliding guide rail seat (42) is connected and fixed to the bottom of the fixed plate (2); a slide groove (411) is formed on the base plate (41), and the lateral sliding guide rail seat (42) is slidably arranged in the slide groove (411).

5. The bridge expansion device according to claim 4, characterized in that: A bottom plate (43) is fixed to the bottom of the fixed plate (2), and the bottom plate (43) is connected and fixed to the transverse sliding guide rail seat (42) via connecting bolts (44).

6. The bridge expansion device according to claim 5, characterized in that: A slide plate (5) is installed between the bottom plate (43) and the bottom of the fixed plate (2), and the end of the cross-seam plate (1) is placed on the slide plate (5).

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

8. The bridge expansion device according to claim 4, characterized in that: The slide groove (411) is an inverted T-shaped groove, and correspondingly, the transverse sliding guide rail seat (42) is an inverted T-shaped guide rail seat, and the inverted T-shaped guide rail seat is connected to the inverted T-shaped groove via a fastener (45).

9. The bridge expansion device according to claim 4, characterized in that: Transverse movement damping components (47) are installed at both ends of the transverse sliding guide rail seat (42), one end of the transverse movement damping component (47) abuts against the transverse sliding guide rail seat (42), and the other end of the transverse movement damping component (47) abuts against the base plate (41).

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

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