Slip bearing device and bridge expansion joint structure

Abstract

The present application belongs to the technical field of bridge construction, and in particular, relates to a sliding bearing device and a bridge expansion joint structure. The sliding bearing device is used for installation at the interval of the girder of the bridge, comprising a support member and a sealing member; the support member is arranged in pairs and used for symmetrical installation at the two sides of the interval of the girder; the sealing member is located between the two support members; the top of the support member is provided with a first inclined surface, the bottom of the sealing member is provided with a second inclined surface, and the second inclined surface is in close contact with the first inclined surface. The bridge expansion joint structure comprises two girders arranged at intervals and the sliding bearing device; an installation groove is arranged between the two girders, and the sliding bearing device is installed in the installation groove. The sliding bearing device of the present application does not have gaps and is not prone to blockage. When installed with the girder, it is installed in a fabricated manner, the bridge expansion joint structure has small construction difficulty, short construction period, and is convenient to implement.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge construction, and in particular, relates to a sliding bearing device and a bridge expansion joint structure. BACKGROUND

[0002] With the development of the construction industry, bridge construction technology is becoming more and more advanced, especially for the construction of shallow buried bridge expansion joints. The expansion joint device is installed at the expansion joint between two bridges, which not only needs to adapt to the horizontal deformation and torsional deformation of the bridge, but also needs to bear the load of the passing vehicles.

[0003] In the traditional highway bridge expansion joint device, there is a large gap between the moving parts, which is easy to block, and thus frequent maintenance and replacement are required. Since the traditional expansion joint device and the beam body are connected by cement pouring, when replacing, not only the expansion joint device needs to be removed, but also the beam body concrete needs to be removed, which has a long construction period and is difficult to implement. During construction, it often needs to be interrupted for several days, which not only makes it difficult to effectively implement, but also affects the safety of the bridge. SUMMARY

[0004] In order to at least solve part of the above problems, the present application provides a sliding bearing device and a bridge expansion joint structure, and the technical scheme is as follows:

[0005] A sliding bearing device for installation at the interval of the beam body of a bridge, comprising a support member and a sealing member; the support members are arranged in pairs and symmetrically installed on both sides of the interval of the beam body; the sealing member is located between the two support members and slides between the two support members; the top of the support member is provided with a first inclined surface, and the bottom of the sealing member is provided with a second inclined surface, which is in close contact with the first inclined surface.

[0006] The sliding bearing device as described above is further preferably provided with a sliding limiting member, which is located below the sealing member and is in sliding connection with the two support members in the transverse direction, for limiting the sliding of the sealing member in the longitudinal direction; a limiting hole is provided on the sliding limiting member, and a limiting rod is provided on the sealing member, the limiting rod being inserted into the limiting hole, and the diameter of the limiting hole being larger than the outer diameter of the limiting rod.

[0007] The sliding bearing device as described above is further preferably provided with a sliding limiting member, which is located below the sealing member and is in sliding connection with the two support members in the transverse direction, for limiting the sliding of the sealing member in the longitudinal direction; a limiting hole is provided on the sliding limiting member, and a limiting rod is provided on the sealing member, the limiting rod being inserted into the limiting hole, and the diameter of the limiting hole being larger than the outer diameter of the limiting rod.

[0008] The sliding bearing device as described above is further preferably characterized in that: upper support columns are arranged on the first support members and lower support columns are arranged on the second support members, and the upper support columns and the lower support columns are in one-to-one correspondence; the sliding limiting member is provided with sliding grooves, the sliding grooves include upper sliding grooves on the top of the sliding limiting member and lower sliding grooves on the bottom of the sliding limiting member; the upper support columns are located in the upper sliding grooves and are in sliding fit with the upper sliding grooves; and the lower support columns are located in the lower sliding grooves and are in sliding fit with the lower sliding grooves.

[0009] The sliding bearing device as described above is further preferably characterized in that: the upper sliding grooves and the lower sliding grooves are both long circular grooves, and the length direction is perpendicular to the symmetry planes of the two support members.

[0010] The sliding bearing device as described above is further preferably characterized in that: the bottom surface of the upper support column is in close contact with the bottom surface of the upper sliding groove, and the top surface of the lower support column is in close contact with the top surface of the lower sliding groove.

[0011] The sliding bearing device as described above is further preferably characterized in that: the bottom surface of the upper support column is in close contact with the bottom surface of the upper sliding groove, and the top surface of the lower support column is in close contact with the top surface of the lower sliding groove.

[0012] The sliding bearing device as described above is further preferably characterized in that: the bottom surface of the upper support column is in close contact with the bottom surface of the upper sliding groove, and the top surface of the lower support column is in close contact with the top surface of the lower sliding groove.

[0013] The sliding bearing device as described above is further preferably characterized in that: the sealing member is provided with a lifting hole.

[0014] The sliding bearing device as described above is further preferably characterized in that: the top end of the limiting rod is connected with the sealing member, and the bottom end of the limiting rod is provided with a limiting block; a gap is arranged between the bottom surface of the sealing member and the top surface of the sliding limiting member, and a gap is arranged between the top surface of the limiting block and the bottom surface of the sliding limiting member.

[0015] The sliding bearing device as described above is further preferably characterized in that: the limiting hole is a long circular hole, and the length direction is perpendicular to the symmetry planes of the two support members.

[0016] The sliding bearing device as described above is further preferably characterized in that: the limiting hole and the limiting rod are both multiple and in one-to-one correspondence.

[0017] The sliding bearing device as described above is further preferably characterized in that: the multiple limiting holes are arrayed along the width direction of the limiting hole.

[0018] The bridge expansion joint structure comprises two beam bodies arranged at intervals and the sliding bearing device; an installation groove is arranged between the two beam bodies, and the sliding bearing device is installed in the installation groove; the sliding bearing device is multiple, and the multiple sliding bearing devices are arranged side by side along the width direction of the beam body.

[0019] The bridge expansion joint structure as described above is further preferably that the bottom surface of the installation groove is provided with an elastic pouring layer, and the sliding bearing device is installed on the elastic pouring layer.

[0020] The bridge expansion joint structure as described above is further preferably that the elastic pouring layer is any one or a combination of an epoxy resin composite material layer and an ultra-high performance concrete layer, and is used for bearing, shock absorption and elimination of torsional deformation of the beam body.

[0021] The bridge expansion joint structure as described above is further preferably that the side wall of the installation groove is provided with a first mounting plate, the side wall of the two beam bodies arranged at intervals is provided with a second mounting plate; the first mounting plate is abutted with one side of the support member, and is used for limiting the displacement of the sliding bearing device when the sliding bearing device is contracted; the second mounting plate is located below the support member, a limiting plate is installed on the second mounting plate, and the limiting plate is abutted with the other side of the support member, and is used for limiting the displacement of the sliding bearing device when the sliding bearing device is stretched.

[0022] The bridge expansion joint structure as described above is further preferably that the end portion of the water stop belt is clamped between the second mounting plate and the limiting plate, the water stop belt is arranged in a U shape between the two beam bodies, and the length is not less than the width of the beam body.

[0023] It can be seen from the analysis that, compared with the prior art, the bridge expansion joint structure has the advantages and beneficial effects that:

[0024] In the sliding bearing device, the sealing member is overlapped between the two support members, can cover the gap between the two support members, forms a plane on the bridge deck, and facilitates smooth passing of vehicles. When the distance between the two support members changes, the first inclined surface is always abutted with the second inclined surface, and there is no gap, so that foreign matters and large particles cannot enter and are not easy to be blocked. The sealing member is overlapped with the support member, and only needs to be lifted to be separated during maintenance, so that the construction difficulty is small, the construction period is short, and the implementation is facilitated.

[0025] In the bridge expansion joint structure, the sliding bearing device is installed in the installation groove arranged between the beam bodies, is installed in a fabricated manner, and is not poured with the beam body as a whole, so that the bridge expansion joint structure is convenient to disassemble during maintenance and does not need to remove the concrete structure on the beam body. In the installation groove, the sliding bearing device is multiple, the single sliding bearing device is small in size, is more labor-saving during disassembly, replacement and maintenance, and has low maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Schematic view of the sliding bearing device of the present application;

[0027] Figure 2 Explosion of the sliding bearing device of the present application Figure 1 ;

[0028] Figure 3 Explosion of the sliding bearing device of the present application Figure 2 ;

[0029] Figure 4 Schematic view of the bridge expansion joint structure of the present application;

[0030] Figure 5 is Figure 4 a sectional view at B-B;

[0031] Figure 6 is Figure 4 a sectional view at A-A.

[0032] In the figure: 1 - second support; 2 - first support; 3 - sliding limiting piece; 4 - sealing piece; 5 - lower support column; 6 - upper sliding groove; 7 - limiting hole; 8 - first inclined surface; 9 - hoisting hole; 10 - limiting block; 11 - lower sliding groove; 12 - upper support column; 13 - limiting rod; 14 - second inclined surface; 15 - beam body; 16 - first mounting plate; 17 - elastic pouring layer; 18 - second mounting plate; 19 - water stop belt; 20 - limiting plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application, and are not required to be the specific orientations and operations of the present application, and therefore cannot be understood as a limitation on the present application. The terms "connected", "connected" used in the present application should be understood broadly, for example, can be fixed connection, can also be detachable connection; can be directly connected, can also be indirectly connected through intermediate components. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0035] Please refer to Figures 1 to 6 , Figure 1 is a schematic view of the slip bearing device of the present application; Figure 2 is an exploded view of the slip bearing device of the present application Figure 1 ; Figure 3 is an exploded view of the slip bearing device of the present application Figure 2 ; Figure 4 is a schematic view of the bridge expansion joint structure of the present application; Figure 5 is Figure 4 a sectional view at B-B; Figure 6 is Figure 4 a sectional view at A-A. In the present application, the transverse direction is the direction of the passage of vehicles on the bridge deck, and the longitudinal direction is the direction perpendicular to the bridge deck.

[0036] As Figure 1 shown in one embodiment of the present application, a slip bearing device is provided for installation at the intervals of the girder 15 of a bridge to form an expansion joint of the bridge. Specifically, the slip bearing device comprises a support member and a sealing member 4. The support members are arranged in pairs and symmetrically installed on both sides of the intervals of the girder 15. The sealing member 4 is located between the two support members and can slide between the two support members when in use. When the sealing member 4 and the support member are in sliding cooperation, the top of the support member is provided with a first inclined surface 8, and the bottom of the sealing member 4 is provided with a second inclined surface 14. The sealing member 4 is placed between the two support members, and the second inclined surface 14 is in contact with the first inclined surface 8.

[0037] In use, the sealing member 4 is placed between the two support members and can cover the gap between the two support members to form a flat surface on the bridge deck, facilitating smooth passage of vehicles. On the pair of symmetrically arranged support members, the two first inclined surfaces 8 are arranged facing each other and gradually downwardly inclined toward the gap. The two second inclined surfaces 14 on the sealing member 4 are in contact with the two first inclined surfaces 8, one by one. When the distance between the two support members changes due to thermal expansion and contraction of the girder 15, the sealing member 4 displaces regardless, and the first inclined surface 8 is always in contact with the second inclined surface 14, so that there is no gap during use, preventing the entry of debris and large particles and reducing the likelihood of blockage, thereby prolonging the service life. The sealing member 4 is overlapped with the support member and does not contact the girder 15. When maintenance or replacement is required, the sealing member 4 can be lifted off, and after maintenance, the sealing member 4 can be put back in place, which is easy to implement with small construction difficulty and short construction period.

[0038] As Figure 1As shown, in another embodiment of the invention, a sliding limiting member 3 is also included. The sliding limiting member 3 is located below the seal 4 and is slidably connected to two support members in the lateral direction (traffic direction of the bridge deck), thus restricting the longitudinal sliding of the seal 4. Specifically, the two support members are positioned between the seal 4 and the sliding limiting member 3. The sliding limiting member 3 can slide laterally to accommodate the thermal expansion and contraction of the beam 15, but cannot move longitudinally. The sliding limiting member has a limiting hole 7, and the seal 4 has a limiting rod 13. The limiting rod 13 is inserted into the limiting hole 7, and the diameter of the limiting hole 7 is larger than the outer diameter of the limiting rod 13. Therefore, the limiting rod 13 can only move within the limiting range of the limiting hole 7, ensuring that the seal 4 will not flip over and fall off due to sudden longitudinal or lateral forces.

[0039] like Figure 2 As shown, in another embodiment of the present invention, the supporting member includes a first supporting member 2 and a second supporting member 1. The top of the first supporting member 2 is provided with a first inclined surface 8. The second supporting member 1 includes a horizontal portion and a vertical portion. One end of the first supporting member 2 is detachably connected to the vertical portion, for example, by bolts. The first supporting member 2 and the second supporting member 1 form an U-shape, thus the supporting member is U-shaped and has an opening. The two ends of the sliding limiting member 3 extend into the U-shaped openings of the two supporting members respectively, and are clearance-fitted with the U-shaped openings to prevent jamming caused by deformation and to prevent it from falling off. In this embodiment, the detachable connection between the first supporting member 2 and the second supporting member 1 facilitates disassembly and replacement during maintenance, thereby reducing construction difficulty and shortening the construction cycle.

[0040] like Figure 2 and Figure 3 As shown, in another embodiment of the present invention, within the U-shaped opening of the supporting member, the first supporting member 2 is provided with an upper supporting column 12, and the second supporting member 1 is provided with a lower supporting column 5, with the upper supporting column 12 and the lower supporting column 5 corresponding one-to-one. The sliding limiting member 3 is provided with a sliding groove, which includes an upper sliding groove 6 located at the top of the sliding limiting member 3 and a lower sliding groove 11 located at the bottom of the sliding limiting member 3. The upper supporting column 12 is located in the upper sliding groove 6 and slides in cooperation with it, while the lower supporting column 5 is located in the lower sliding groove 11 and slides in cooperation with it, thereby limiting the sliding range of the sliding limiting member 3 and ensuring stability during use. Preferably, the upper supporting column 12 and the lower supporting column 5 are both cylinders, and the upper sliding groove 6 and the lower sliding groove 11 are both elongated oval grooves, with their length direction perpendicular to the plane of symmetry of the two supporting members, which can ensure that the sliding limiting member 3 has a suitable sliding range.

[0041] Further, the bottom surface of the upper support column 12 is attached to the bottom surface of the upper sliding groove 6, and the top surface of the lower support column 5 is attached to the top surface of the lower sliding groove 11, so that the sliding limiting piece 3 can not only slide, but also bear the pressure from the first support 2, and the sliding limiting piece 3 and the two support members form an integral load-bearing structure, which is uniform in stress, not easy to damage, and strong in reliability.

[0042] Further, the bottom surface of the upper support column 12 is attached to the bottom surface of the upper sliding groove 6, and the top surface of the lower support column 5 is attached to the top surface of the lower sliding groove 11, so that the sliding limiting piece 3 can not only slide, but also bear the pressure from the first support 2, and the sliding limiting piece 3 and the two support members form an integral load-bearing structure, which is uniform in stress, not easy to damage, and strong in reliability.

[0043] As shown in Figure 2 and Figure 3 , in another embodiment of the present application, the top end of the limiting rod 13 is connected with the sealing piece 4, and the bottom end of the limiting rod 13 is provided with a limiting block 10. A gap is arranged between the bottom surface of the sealing piece 4 and the top surface of the sliding limiting piece 3, and a gap is arranged between the top surface of the limiting block 10 and the bottom surface of the sliding limiting piece 3, so that the sealing piece 4 can be displaced within a permissible range during use, and will not fail. As a preferred, the limiting hole 7 is an oblong hole, and the length direction is perpendicular to the symmetry plane of the two support members, so as not to hinder the sliding of the sealing piece 4 within the normal use range in the transverse direction.

[0044] Further, the limiting hole 7 and the limiting rod 13 are both multiple, and one-to-one corresponding, and the multiple limiting holes 7 are arranged in an array along the width direction of the limiting hole 7, so as to ensure the reliability of the limiting, and ensure that the sealing piece 4 does not fail.

[0045] As shown in Figures 4 to 6 , based on the above sliding load-bearing device, the present application further provides a bridge expansion joint structure.

[0046] As shown in Figure 4 , in an embodiment of the present application, the bridge expansion joint structure comprises two beam bodies 15 and a sliding load-bearing device arranged in a spaced manner. Specifically, the two beam bodies 15 are provided with a mounting groove, and the sliding load-bearing device is mounted in the mounting groove. The sliding load-bearing device is multiple, and is arranged side by side along the width direction of the beam body 15. The sliding load-bearing device is mounted in the mounting groove arranged between the beam bodies 15, and is mounted in a assembled manner, rather than being integrated with the beam body 15 by pouring, so that the bridge expansion joint structure is convenient to disassemble during maintenance, and does not need to remove the concrete structure on the beam body 15. In the mounting groove, the sliding load-bearing device is multiple, and the single sliding load-bearing device is small in size, so that it is more labor-saving to disassemble and replace, and the maintenance cost is low.

[0047] As shown in Figure 5As shown in the embodiment of the present application, the bottom surface of the installation groove is provided with an elastic pouring layer 17, and the field secondary pouring and the beam body 15 are integrated, and the sliding bearing device is installed on the elastic pouring layer 17. The upper surface of the elastic pouring layer 17 is smooth and flat, which facilitates the leveling when the sliding bearing device is installed. In addition, the elastic pouring layer 17 is elastic, can bear and shock-absorb, and can also eliminate the slight torsional deformation of the beam body 15 through elastic deformation, so that the bridge expansion joint structure is more stable, safe and reliable in operation. As an optional solution, the elastic pouring layer 17 can be an epoxy resin composite material layer or an ultra-high performance concrete layer (Ultra-High Performance Concrete in Chinese, abbreviated as UHPC). It can be a single one of the two, and also can be a combination of the two, for example, the bottom layer is an ultra-high performance concrete layer, and the upper layer is an epoxy resin composite material layer; the bottom layer is an epoxy resin composite material layer, and the upper layer is an ultra-high performance concrete layer.

[0048] As shown in the embodiment of the present application, Figure 6 As shown in another embodiment of the present application, the side wall of the installation groove is provided with a first installation plate 16, the side wall of the two spaced beam bodies 15 is provided with a second installation plate 18, and a limiting plate 20 is installed on the second installation plate 18. The first installation plate 16, the second installation plate 18 and the limiting plate 20 are all steel plates, which can provide assembly positions for the fixation of the sliding bearing device, and the sliding bearing device does not need to be welded or pre-buried during installation, and the civil structure does not need to be changed during replacement, which has good maintenance performance. The first installation plate 16 abuts against one side of the support member, which can limit the displacement of the sliding bearing device when it shrinks, and avoid the direct contact of the sliding bearing device with the concrete of the beam body 15. The second installation plate 18 is located below the support member, which can avoid the exposure of the concrete of the beam body 15 at the interval. The limiting plate 20 abuts against the other side of the support member, which can limit the displacement of the sliding bearing device when it stretches, and ensure that the support member moves synchronously with the corresponding beam body 15.

[0049] Further, the ends of the water stop belt 19 are clamped between the second installation plate 18 and the limiting plate 20, both ends of the water stop belt 19 are clamped, and the water stop belt 19 is arranged in a U shape between the two beam bodies 15, and the length is not less than the width of the beam body 15. The water infiltrated from the sliding bearing device can be discharged by the water stop belt 19, so as to protect the beam body 15.

[0050] As shown in the embodiment of the present application, Figures 1 to 6 As shown in the embodiment of the present application,

[0051] During construction, first, the first mounting plate 16 and the second mounting plate 18 are mounted on the beam body 15, and installation grooves for installation of the sliding load bearing device are reserved. Then, the elastic pouring layer 17 is poured in the installation grooves, and after pouring is completed, the water stop belt 19 is installed, and the water stop belt 19 is clamped by the limiting plate 20 and the second mounting plate 18. Finally, the sliding load bearing device is installed in the installation grooves. During installation of the sliding load bearing device, the second support member 1, the sliding limiting member 3, the sealing member 4 and the first support member 2 are sequentially installed.

[0052] During work, the sliding load bearing device acts when the beam body 15 deforms. Specifically, when the two beam bodies 15 move towards the interval, the support member moves with the beam body 15, and sliding occurs between the support member and the sliding limiting member 3 (for example, the upper support column 12 slides in the upper sliding groove 6, and the lower support column 5 slides in the lower sliding groove 11, and when sliding, the first support member 2 can obtain multi-point support of the second support member 1 through the upper support column 12, the lower support column 5 and the sliding limiting member 3, to ensure smooth passing of the vehicle), at the same time, the sealing member 4 moves upwards, and the support member and the sealing member 4 are always attached, to ensure sealing. Conversely, when the two beam bodies 15 move away from the interval, the sealing member 4 moves downwards.

[0053] During maintenance, after the first support member 2 is disassembled, the sealing member 4 (the sealing member 4 is provided with a lifting hole 9) is lifted, and the components of the sliding load bearing device except the second support member 1 can be lifted out integrally, to facilitate maintenance. After damaged components are replaced, assembly and installation can be performed, which is convenient and fast.

[0054] It is to be understood by those skilled in the art that the present application can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above disclosed embodiments are merely examples, and are not the only ones, and the above embodiments can be combined arbitrarily. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

Claims

1. A sliding bearing device for installation at the beam intervals of a bridge, characterized in that, include: Support components and seals; The supporting components are arranged in pairs for symmetrical installation on both sides of the beam spacing; The seal is located between the two support members and is used to slide between the two support members; The top of the support member is provided with a first inclined surface, and the bottom of the seal is provided with a second inclined surface, the second inclined surface being in contact with the first inclined surface; It also includes a sliding limiter, which is located below the seal and is slidably connected to the two support members in the lateral direction to limit the sliding of the seal in the longitudinal direction; The sliding limiting member is provided with a limiting hole, and the sealing member is provided with a limiting rod. The limiting rod is inserted into the limiting hole, and the diameter of the limiting hole is larger than the outer diameter of the limiting rod. The supporting components include a first supporting member and a second supporting member; The first support member has the first inclined surface at its top; The second support member includes a horizontal part and a vertical part, and one end of the first support member is detachably connected to the vertical part; The first support member and the second support member form an incline, and the two ends of the sliding limiting member respectively extend into the incline openings of the two support members and are in clearance fit with the incline openings; Within the U-shaped opening of the supporting member, the first supporting member is provided with an upper supporting column, and the second supporting member is provided with a lower supporting column, with the upper supporting column and the lower supporting column corresponding one to one; The sliding limiting member is provided with a sliding groove, which includes an upper sliding groove located at the top of the sliding limiting member and a lower sliding groove located at the bottom of the sliding limiting member; The upper support column is located in the upper sliding groove and slides in conjunction with the upper sliding groove; The lower support column is located within the lower sliding groove and slides in conjunction with the lower sliding groove.

2. The sliding bearing device according to claim 1, characterized in that: Both the upper sliding groove and the lower sliding groove are elongated oval grooves, with their length direction perpendicular to the plane of symmetry of the two supporting members; The bottom surface of the upper support column is in contact with the bottom surface of the upper sliding groove, and the top surface of the lower support column is in contact with the top surface of the lower sliding groove. The bottom perimeter of the upper support column and the top perimeter of the lower support column are both rounded. The seal is smoothly rounded at the end of the second inclined surface.

3. The sliding bearing device according to claim 1, characterized in that: The top end of the limiting rod is connected to the sealing element, and the bottom end of the limiting rod is provided with a limiting block; A gap is provided between the bottom surface of the sealing element and the top surface of the sliding limiting element, and a gap is provided between the top surface of the limiting block and the bottom surface of the sliding limiting element.

4. The sliding bearing device according to claim 1, characterized in that: The limiting hole is an elongated oval hole, and its length direction is perpendicular to the plane of symmetry of the two supporting components; There are multiple limiting holes and multiple limiting rods, and they correspond one-to-one. The plurality of limiting holes are arranged in an array along the width direction of the limiting holes.

5. A bridge expansion joint structure, characterized in that, include: Two beams spaced apart and the sliding bearing device as described in any one of claims 1 to 4; An installation groove is provided between the two beams, and the sliding bearing device is installed in the installation groove; There are multiple sliding bearing devices, which are arranged side by side along the width direction of the beam.

6. The bridge expansion joint structure according to claim 5, characterized in that: The bottom surface of the mounting groove is provided with an elastic casting layer, and the sliding bearing device is installed on the elastic casting layer; The elastic casting layer is any one or a combination of epoxy resin composite material layer and ultra-high performance concrete layer, used for load bearing, shock absorption and elimination of torsional deformation of the beam.

7. The bridge expansion joint structure according to claim 6, characterized in that: The sidewall of the mounting groove is provided with a first mounting plate, and the sidewalls of the two beams that form a gap are provided with a second mounting plate; The first mounting plate abuts against one side of the supporting member to limit the displacement of the sliding bearing device when it retracts; The second mounting plate is located below the support member, and a limiting plate is installed on the second mounting plate. The limiting plate abuts against the other side of the support member to limit the displacement of the sliding bearing device when it extends. The end of the waterstop is held between the second mounting plate and the limiting plate. The waterstop is arranged in a U-shape between the two beams and its length is not less than the width of the beam.

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