Bridge expansion joint structure capable of adapting to beam displacement

Abstract

The present invention discloses a bridge expansion joint structure that can adapt to the displacement of a beam body, wherein the cross-joint comb plates and / or fixed comb plates are installed on the beam body on which they are located by means of a floating support device, thereby enabling the comb plates to have good independence and form relative adaptability independent of the beam body, so that they can well adapt to the vertical and lateral deformations of the beam body and the beam end, and can well reduce the deformation or displacement of the comb plates themselves relative to the lateral and vertical torsional deformations of the beam body and the beam end, thereby ensuring that the movable comb plates and the fixed comb plates can always be in a good connection state, thereby avoiding damage to the bridge expansion joint device due to the deformation of the beam body and the beam end, and ensuring the smooth and safe passage of vehicles.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge expansion joints, and in particular to a bridge expansion joint structure capable of adapting to beam displacement. Background Art

[0002] A bridge expansion joint is a device installed between two beam ends, between a beam end and an abutment, or at a bridge's hinged joint to accommodate bridge deck deformation. Its purpose is to accommodate structural displacement caused by vehicle loads and bridge construction materials. The expansion joint is required to be able to freely expand and contract in the longitudinal direction of the bridge, and to move smoothly, without jerks or noise, when vehicles pass through it. Existing bridge expansion joints include comb-tooth plate expansion joints and modular expansion joints. Comb-tooth plate expansion joints, due to their relatively small expansion range, are mostly used on small-span bridges, while modular expansion joints, with their larger expansion range, are primarily used on large-span bridges.

[0003] The present invention primarily improves comb-plate expansion joint devices. Conventional comb-plate expansion joint devices typically include a fixed comb plate and a movable comb plate. The fixed comb plate is mounted on one beam, while the movable comb plate is mounted on the other beam. The comb ends of the movable comb plate span the expansion joint between the two beams and overlap the other beam. The comb teeth of the movable comb plate are spaced and intersected with those of the fixed comb plate.

[0004] In bridges, under the influence of vehicle loads and temperature, the beam body sometimes experiences deflection and deformation, causing the beam end to warp slightly. In this case, the comb teeth and the plate body of the comb plate may also warp upward, thereby damaging the comb plate type expansion joint device. To address this existing problem, the prior art proposes a rotatably connected comb plate structure, such as that disclosed in Chinese patent CN2561814Y. The movable comb plate is configured to be composed of a movable plate body, a movable connecting plate, and comb teeth that are hinged in sequence. By means of the hinged connection between the movable connecting plate and the movable plate body, and the hinged connection between the comb teeth and the movable connecting plate, the movable connecting plate and the movable plate body can rotate relative to each other when the movable plate body warps upward with the warping of the beam end, so that the movable connecting plate and the comb teeth can still be flatly attached to the beam body. On this basis, Chinese patent CN1333137C further discloses a connection structure in which a movable comb plate as a whole rotates with the beam body. That is, when the beam body produces deflection deformation, or the beam end rises or sinks, the movable comb plate and the beam body will rotate, so that the movable comb plate maintains a flat posture, avoiding damage to the entire expansion joint device and ensuring smooth passage of vehicles.

[0005] While the structure disclosed in the aforementioned patent effectively addresses the problem of comb plates warping with the beam ends, it cannot effectively address deformation requirements caused by horizontal lateral rotation or torsional deformation of the beam body. Specifically, during actual bridge use, the beam body undergoes horizontal lateral rotation and torsional deformation due to factors such as temperature and wind, which can easily cause lateral relative translation between the movable comb plates and the beam body where the fixed comb plates are located. In such cases, the comb plate expansion joint device is prone to fracture due to the intersecting spacing between the comb teeth of the movable and fixed comb plates.

[0006] To address the aforementioned issues, the prior art provides a bridge expansion joint device capable of resisting both lateral and vertical displacement, such as those disclosed in Chinese Patents CN104074133A and CN104358209B. An elastically retractable device forms a flexible connection between the comb plate and the beam body. The elastically retractable device, through shear deformation, adapts to deformation and displacement caused by the vertical and / or lateral rotation of the beam end. The disclosed elastically retractable devices are all made of rubber or other polymer materials, which presents the following problems: They are prone to fatigue and are easily affected by changes in temperature or ambient humidity. Under prolonged load, they can easily become loose, resulting in operational failure or an inability to meet required operating requirements. Moreover, rubber mainly exhibits the elasticity required by the working scenario based on the differences in molecular structure and processing methods, rather than exhibiting the required elasticity based on the mechanical structure. This means that in the structure where the comb plate and the beam body are connected by means of an elastic rubber expansion device, there is still a certain degree of follow-up between the comb plate and the beam body based on the connection characteristics of the rubber elastic device, that is, the comb plate is still more likely to produce movement or deformation consistent with the beam body, which makes the relative adaptive displacement of the comb plate relative to the beam body not very smooth and stable.

[0007] Based on this, it is necessary to involve a bridge expansion joint installation structure based on a mechanical structural form, so that it not only has a long service life and is not prone to failure, but also enables the comb plate to have relative adaptability independent of the beam body. Summary of the Invention

[0008] In view of this, the present invention provides a bridge expansion joint structure that can adapt to the displacement of the beam body. It not only has a long working life and is not easy to fail, but also can make the comb plate have relative adaptability independent of the beam body, so that it can well adapt to the vertical and lateral deformation of the beam body and the beam end. Compared with the lateral and vertical torsional deformation of the beam body and the beam end, it can well reduce the deformation or displacement of the comb plate itself, thereby ensuring that the movable comb plate and the fixed comb plate can always have a good connection state, thereby avoiding damage to the bridge expansion joint device due to the deformation of the beam body and the beam end, and ensuring the smooth and safe passage of vehicles.

[0009] The present invention discloses a bridge expansion joint structure that can adapt to the displacement of the beam body, including a fixed comb plate and a cross-slot comb plate respectively arranged on the beam bodies on both sides of the bridge expansion joint. The cross-slot comb plate extends forward from the beam body on which it is located across the bridge expansion joint and its end is located on the opposite beam body on the other side, and the comb teeth at the end of the movable comb plate are arranged in a cross-spaced manner with the comb teeth of the fixed comb plate; the cross-slot comb plate is a movable comb plate relative to the fixed comb plate, that is, the cross-slot comb plate can move relative to the fixed comb plate and the beam body on which the fixed comb plate is located as the beam body is displaced in the longitudinal direction. The present invention is characterized in that it also includes a floating support device, and the cross-slot comb plate and / or the fixed comb plate are installed on the beam body on which they are located in a floating manner with the help of the floating support device. In one embodiment, the cross-slot comb plates are float-supported on the beams on which they are located via floating support devices. In another embodiment, the fixed comb plates are float-supported on the beams on which they are located via floating support devices. In a preferred embodiment, the cross-slot comb plates and the fixed comb plates are respectively supported on their respective beams via floating support devices. Multiple floating support devices can be arranged along the length direction of the cross-slot comb plates or the fixed comb plates (i.e., the horizontal direction of the bridge beams) to ensure that the corresponding comb plates are stably supported and arranged on the corresponding beams.

[0010] The so-called floating support means that the corresponding comb plate is floated above the corresponding beam body with the help of elastic support force, so that the beam body and the corresponding comb plate have relative independence, and the vibration energy or active displacement can be dissipated or offset with the help of the floating support device located between the comb plate and the beam body, thereby not only reducing the transmission of vibration energy caused by driving on the comb plate to the beam body, but also making the comb plate have good structural independence relative to the beam body, so that it can adapt well to the vertical and lateral deformation of the beam end, and can well reduce the deformation or displacement of the comb plate itself relative to the lateral and vertical torsional deformation of the beam end.

[0011] According to the bridge expansion joint structure capable of adapting to the displacement of the beam body of the present invention, the floating support device includes a seat body, a connecting member and a support assembly. The seat body is used to form a fixed connection with the beam body, the seat body has a central concave cavity, the connecting member includes a connecting plate for forming a connection with the corresponding comb plate and a floating rod extending from top to bottom into the central concave cavity; the support assembly is arranged in at least two groups along the circumferential direction of the seat body, and a transverse telescopic channel is provided on the seat body corresponding to each support assembly. The support assembly is arranged in the corresponding transverse telescopic channel along the seat body in an elastically telescopic manner, and each support assembly extends toward the central concave cavity and maintains constant contact with the floating rod; in an initial state, the floating rod is floated and supported in the central concave cavity by means of the transverse elastic supporting force of the support assembly, and there is a transverse movement margin and a vertical movement margin between the floating rod and the seat body for relative movement. When the seat body and the floating rod produce transverse relative movement and / or vertical relative movement, at least one of the support assemblies can be compressed so that the seat body and the floating rod can adapt to the relative movement between each other.

[0012] In the above structure, the connecting plate is used to connect with the corresponding comb plate, that is, the corresponding comb plate is installed on the connecting plate, and the floating rod located below the connecting plate extends downward and extends into the central concave cavity of the seat body. Multiple groups of support assemblies are provided in the circumferential direction of the seat body, and each group is arranged in the transverse direction of the seat body (if the seat body is a cylindrical structure, it can also be called the radial direction), and extends into the central concave cavity near the end of the central concave cavity. In the present invention, each support assembly provides a transverse support force for the floating rod. With the help of the transverse support force of multiple groups of support assemblies, they cooperate with each other to form a transverse clamping force on the floating rod, so that the floating rod is supported in a floating manner in the central concave cavity.

[0013] According to the bridge expansion joint structure capable of adapting to the displacement of the beam body of the present invention, the floating rod has a lower body that cooperates with the support assembly, and the lower body of the floating rod is an inner concave circumferential side surface in the circumferential direction, and the vertical cross-section of the inner concave circumferential side surface is an arc; the support assembly includes a support head and a spring member, and the spring member is arranged at the bottom of the transverse expansion channel. One end of the support head abuts against the spring member in the transverse expansion channel, and the other end extends toward the middle concave cavity and extends out of the transverse expansion channel. The extended end of the support head maintains constant contact with the corresponding position of the inner concave circumferential side surface of the floating rod and has friction; in the initial state, the spring member has a compressive force on the support head toward the middle concave cavity, so that the floating rod can be floated and supported in the middle concave cavity.

[0014] Specifically, in the initial state, the end portion of the support head of the support assembly is supported and matched to the arc-shaped bottom position of the concave cylindrical side surface, that is, the concave circumferential side surface is at the middle position in the vertical direction. When the beam end of the beam body produces vertical deformation and displacement, the seat body can produce relative movement with the help of the support head of the support assembly and the concave circumferential side surface of the lower body of the floating rod, wherein the support head can move upward or downward along the vertical trajectory of the concave circumferential side surface. Since the vertical cross-section of the concave circumferential side surface is arc-shaped, in the process of the support head moving upward or downward along the vertical trajectory due to the vertical deformation of the beam body, the support head is pressed into the horizontal telescopic channel, thereby compressing the spring part. Under the reaction effect of the compression of the spring part, the support head is pressed against the outer side of the lower body of the floating rod. In this process, the floating rod produces a very small amount of vertical displacement relative to the displacement of the beam body, or even no vertical displacement, so that the floating rod will not be displaced due to the vertical displacement of the beam body, thereby ensuring the flatness of the corresponding comb plate.

[0015] When the beam body undergoes lateral displacement in the width direction of the bridge beam body, similarly, because the support head of the support assembly cooperates with the inner concave circumferential side surface of the lower body of the floating rod, when the seat body undergoes lateral displacement along with the beam body, the support assembly in the displacement direction is compressed, and the other support assembly arranged symmetrically is extended, thereby providing the possibility for relative movement of the seat body relative to the floating rod; during this process, the floating rod is also not displaced by the displacement of the beam body, thereby ensuring the flatness of the corresponding comb plate. Moreover, by virtue of the cooperation between the inner concave circumferential side surface of the lower body and the support head of the support assembly, even when the beam body is warped, the seat body and the floating rod can still undergo relative movement, thereby preventing the corresponding comb plate from warping along with the warping of the beam body.

[0016] In addition, the floating support device can also play a good vibration isolation role. That is, when the comb plate generates vibration energy due to the driving of the vehicle, the vibration energy can be dissipated well with the help of the auxiliary support assembly. Specifically, the vibration energy is dissipated with the help of the spring parts of the support assembly, thereby avoiding the vibration being transmitted to the beam body and causing damage to the beam body.

[0017] In the bridge expansion joint structure capable of adapting to beam displacement according to the present invention, the protruding end of the support head has a rounded structure. This rounded structure effectively ensures the support head can move up and down along the inner concave circumference of the lower body of the floating member, or the lower body of the floating member can move up and down relative to the support head.

[0018] The bridge expansion joint structure, adapted to beam displacement according to the present invention, further includes a vertical support member, which elastically supports the floating member from its base within the central cavity. The vertical support member provides additional floating support for the floating member and, when the beam vertically deflects, cooperates with the support assembly to prevent the beam vertical displacement from being transferred to the corresponding comb plate.

[0019] According to the bridge expansion joint structure capable of adapting to beam displacement of the present invention, the vertical support member is a conical spring. By means of the variable pitch structure of the conical spring, a good vertical floating support force is provided for the floating rod.

[0020] According to the bridge expansion joint structure capable of adapting to beam displacement of the present invention, a connecting plate and an elastic connecting band are further disposed horizontally between the ends of the cross-slot comb tooth plates and the beam bodies on which they are located. The connecting plate clamps the elastic connecting band between the connecting plate and the ends of the cross-slot comb tooth plates, exerting downward pressure on the ends of the cross-slot comb tooth plates. The connecting plate and the elastic connecting band provide a certain amount of pressure on the ends of the cross-slot comb tooth plates to prevent them from tilting. The elastic connecting band provides elasticity for movement, allowing the ends of the cross-slot comb tooth plates to have a certain degree of mobility while being pressed against each other.

[0021] According to the bridge expansion joint structure capable of adapting to the displacement of the beam body according to the present invention, the elastic connecting belt includes a first vertical section and a transverse section forming an L-shape, and the end of the cross-slot comb plate is provided with an L-shaped pedestal for receiving the L-shaped section. The first vertical section is clamped between the horizontal side surface of the connecting plate and the vertical side wall of the L-shaped pedestal, and the transverse section is clamped between the bottom side surface of the connecting plate and the bottom side wall of the L-shaped pedestal.

[0022] According to the bridge expansion joint structure capable of adapting to beam displacement of the present invention, a concrete layer is provided on the beam, and the connecting plate is connected to the concrete layer by means of an elastic vibration damping device.

[0023] According to the bridge expansion joint structure capable of adapting to the displacement of the beam body of the present invention, the elastic vibration damping device includes a shell, a rubber vibration damping body built into the shell, and a connecting piece with one end embedded in the rubber vibration damping body and the other end extending out of the shell for fixed connection with the connecting plate.

[0024] Beneficial effect: In the bridge expansion joint structure capable of adapting to the displacement of the beam body of the present invention, since the cross-joint comb plates and / or fixed comb plates are installed on the beam body where they are located with the help of a floating support device, the comb plates can have better independence and form relative adaptability independent of the beam body, so that they can adapt well to the vertical and lateral deformation of the beam body and the beam end, and can well reduce the deformation or displacement of the comb plates themselves relative to the lateral and vertical torsional deformation of the beam body and the beam end, thereby ensuring that the movable comb plates and the fixed comb plates can always have a good connection state, thereby avoiding damage to the bridge expansion joint device due to the deformation of the beam body and the beam end, and ensuring the smooth and safe passage of vehicles.

[0025] The bridge expansion joint structure capable of adapting to beam displacement of the present invention will be disclosed in detail below with reference to the embodiments and reference numerals shown in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 for Figure 1 Enlarged view of point A.

[0028] Reference numerals

[0029] 1. Beam body; 2. Fixed comb plate; 3. Span comb plate; 4. Comb teeth; 5. Base body; 6. Central concave cavity; 7. Connecting plate; 8. Floating rod; 9. Horizontal telescopic channel; 10. Inner concave peripheral side; 11. Support head; 12. Spring member; 13. Plug; 14. Vertical support member; 15. Connecting plate; 16. Elastic connecting belt; 17. Concrete layer; 18. Elastic vibration reduction device; 19. Lower body; 20. Embedded steel bars; 21. Upper cover; 22. Horizontal gap; 23. Dustproof waterstop; 24. Bolt; 25 Outer shell. DETAILED DESCRIPTION

[0030] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] Figure 1 The figure shows the overall structure of the bridge expansion joint structure capable of adapting to the displacement of the beam body of the present invention. Figure 2 for Figure 1 Enlarged view of point A. Combined Figure 1 and Figure 2 As shown, the present invention discloses a bridge expansion joint structure that can adapt to the displacement of the beam body, including a fixed comb plate 2 and a cross-slot comb plate 3 respectively arranged on the beam bodies 1 on both sides of the bridge expansion joint, the cross-slot comb plate 3 spans the bridge expansion joint from the beam body 1 on which it is located and the end is located on the opposite other side beam body 1, and the comb teeth 4 at the end of the cross-slot comb plate 3 are arranged in a cross-spaced manner with the comb teeth of the fixed comb plate 2. Specifically, the fixed comb plate 2 is installed on one side beam body 1, and the movable comb plate is installed on the other side beam body 1, and the comb teeth end of the movable comb plate spans the expansion joint between the two sides beam body 1 and overlaps on the other side beam body 1, the cross-slot comb plate 3 is a movable comb plate relative to the fixed comb plate 2, that is, the cross-slot comb plate 3 can move relative to the fixed comb plate 2 and the beam body 1 where the fixed comb plate 2 is located as the beam body 1 is displaced in the longitudinal direction. In addition, a dustproof waterstop 23 is also provided at the expansion joint between the two sides beam body 1.

[0034] Combine Figure 1 and Figure 2 As shown, the present invention is characterized in that it also includes a floating support device, and the cross-slot comb plate 3 is installed on the beam body 1 in a floating support manner with the help of the floating support device. Of course, those skilled in the art can also understand that according to the solution disclosed in the embodiment of the present invention, the fixed comb plate 2 can also be arranged to be installed on the beam body 1 in a floating support manner with the help of the floating support device. Multiple floating support devices can be arranged along the length direction of the cross-slot comb plate (i.e., the horizontal direction of the bridge beam body) so that the corresponding comb plates are stably supported and set on the corresponding beam body.

[0035] In an embodiment of the present invention, the floating support device includes a seat body 5, a connecting member and a support assembly. The seat body 5 is used to form a fixed connection with the beam body 1. The seat body 5 has a central concave cavity 6. The connecting member includes a connecting plate 7 for forming a connection with the corresponding comb plate and a floating rod 8 extending from top to bottom into the central concave cavity 6; the support assembly is arranged in at least two groups along the circumferential direction of the seat body 5, and a transverse telescopic channel 9 is provided on the seat body 5 corresponding to each support assembly. The support assembly is arranged in the corresponding transverse telescopic channel along the seat body 5 in a manner that can elastically extend and retract. In the channel 9, each support component extends toward the central concave cavity 6 and maintains constant contact with the floating rod 8; in the initial state, the floating rod 8 is floated and supported in the central concave cavity 6 by means of the lateral elastic supporting force of the support component, and there is a lateral movement margin and a vertical movement margin between the floating rod 8 and the seat body 5 for relative movement. When the seat body 5 and the floating rod 8 produce lateral relative movement and / or vertical relative movement, at least one of the support components can be compressed so that the seat body 5 and the floating rod 8 can adapt to the relative movement between each other.

[0036] Among them, when installing the corresponding comb plate, a concrete layer 17 is first poured on the corresponding beam body 1, and an outer shell tube 25 embedded in it and open at the top is provided on the concrete layer 17. The floating support assembly is arranged in the outer shell tube 25 during installation, and the seat body 5 can be fixedly connected with the embedded steel bars 20 embedded in the beam body 1 by means of bolts 24, so that the seat body 5 of the floating support assembly can be displaced along with the displacement of the tube beam body 1.

[0037] Furthermore, in the present invention, the connecting plate 7 is a plate-like structure that is fixedly connected to the cross-slot comb plate 3 via bolts. The floating rod 8 is composed of two parts: a rod-shaped section located at the upper body and a cylindrical section forming the lower body 19. The upper body extends through the upper cover 21 of the base 5 and is then fixedly connected to the connecting plate 7 via screws. A horizontal gap 22 is defined between the upper body of the floating rod 8 and the through-hole in the upper cover 21. A horizontal gap is also defined between the lower body 19 and the sidewalls of the central concave cavity 6 of the base 5, allowing for lateral movement between the base 5 and the floating rod 8. Similarly, vertical gaps are defined between the upper side surface of the lower body 19 and the upper cover 21, as well as between the lower bottom surface and the bottom of the central concave cavity 6, allowing for vertical movement between the base 5 and the floating rod 8.

[0038] In an embodiment of the present invention, the floating rod 8 has a lower body 19 that cooperates with the support assembly. The lower body 19 of the floating rod 8 is an inner concave circumferential side surface 10 in the circumferential direction, and the vertical cross-section of the inner concave circumferential side surface 10 is an arc; the support assembly includes a support head 11 and a spring member 12. The bottom of the transverse telescopic channel 9 is blocked by a plug 13. The spring member 12 is arranged at the bottom of the transverse telescopic channel 9 and rests on the plug 13. One end of the support head 11 rests on the spring member 12 in the transverse telescopic channel 9, and the other end extends toward the central concave cavity 6 and protrudes out of the transverse telescopic channel 9. The protruding end of the support head 11 maintains constant contact with the corresponding position of the inner concave circumferential side surface 10 of the floating rod 8 and has friction; in the initial state, the spring member 12 has a compressive force on the support head 11 toward the central concave cavity 6, so that the floating rod 8 can be floated and supported in the central concave cavity 6.

[0039] In the embodiment of the present invention, the protruding end of the support head 11 is a round head structure.

[0040] In the embodiment of the present invention, a vertical support member 14 is further included, which forms a vertical elastic support for the floating rod 8 from the bottom of the floating rod 8 in the middle cavity 6. The vertical support member 14 is a conical spring.

[0041] In an embodiment of the present invention, a connecting plate 15 and an elastic connecting belt 16 are further provided between the ends of the cross-slot comb tooth plates 3 and the beam body 1 on which they are located in the horizontal direction. The connecting plate 15 clamps the elastic connecting belt 16 between the connecting plate 15 and the ends of the cross-slot comb tooth plates 3 in a manner that exerts downward pressure on the ends of the cross-slot comb tooth plates 3. The connecting plate 15 and the elastic connecting belt 16 provide a certain amount of pressure on the ends of the cross-slot comb tooth plates 3 to prevent the ends of the cross-slot comb tooth plates 3 from tilting. The elastic connecting belt 16 provides elasticity for movement, so that the ends of the cross-slot comb tooth plates 3 have a certain degree of mobility while being pressed.

[0042] In this embodiment of the present invention, the elastic connecting band 16 comprises an L-shaped first vertical section and a transverse section. An L-shaped pedestal is provided at the end of the cross-gap comb plate 3 to receive the L-shaped section. The first vertical section is clamped between the horizontal side of the connecting plate 15 and the vertical sidewall of the L-shaped pedestal, while the transverse section is clamped between the bottom side of the connecting plate 15 and the bottom sidewall of the L-shaped pedestal. In this embodiment, the elastic connecting band 16 has a Z-shaped structure, comprising an L-shaped section and a second vertical section connected to the end of the transverse section of the L-shaped section. The second vertical section extends downward, with its end resting against the concrete layer 17 to provide a certain degree of elastic support.

[0043] In an embodiment of the present invention, the connecting plate 15 is connected to the concrete layer 17 by means of an elastic vibration damping device 18. The elastic vibration damping device 18 includes a shell, a rubber vibration damping body built into the shell, and a connector with one end embedded in the rubber vibration damping body and the other end extending out of the shell for fixed connection with the connecting plate 15. The rubber vibration damping body is made of an existing rubber material, which has a certain elasticity and a horizontal shear force. With the help of the elastic vibration damping device 18, the connecting plate 15 can be well pressed against the end of the cross-gap comb plate 3, and with the help of the elastic vibration damping device 18, when the beam body 1 is displaced, the cross-gap connecting plate 15 can rely on the shear force of the rubber vibration damping body to resist the kinetic energy brought about by the displacement of the beam body 1, thereby ensuring good pressure on the cross-gap comb plate 3, and then ensuring the horizontal flatness of the cross-gap comb plate 3.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A bridge expansion joint structure capable of adapting to beam displacement, comprising fixed comb plates (2) and cross-comb plates (3) respectively arranged on beams (1) on both sides of the bridge expansion joint, wherein the cross-comb plates (3) extend forward from the beam (1) on which they are located across the bridge expansion joint and have their ends located on the opposite beam (1), and the comb teeth at the ends of the cross-comb plates (3) and the comb teeth (4) of the fixed comb plates (2) are arranged in a cross-spaced manner; and characterized in that: It also includes a floating support device, and the cross-slot comb plate (3) and / or the fixed comb plate (2) are installed on the beam body (1) in a floating supported manner by means of the floating support device; The floating support device comprises: A seat body (5) is used to form a fixed connection with the beam body (1) and has a central cavity (6); A connecting member comprising a connecting plate member (7) for forming a connection with a corresponding comb plate and a floating rod member (8) extending from top to bottom into the middle concave cavity (6); Support components are arranged in at least two groups along the circumferential direction of the base body (5), and a transverse telescopic channel (9) is provided on the base body (5) corresponding to each support component. The support components are arranged in the corresponding transverse telescopic channel (9) along the base body (5) in a manner capable of elastic expansion and contraction, and each support component extends toward the central concave cavity and maintains constant contact with the floating rod (8); The lower body (19) of the floating rod (8) is an inner concave circumferential side surface (10) in the circumferential direction, and the vertical cross-section of the inner concave circumferential side surface (10) is arc-shaped; the support assembly includes a support head (11) and a spring member (12), and the spring member (12) is arranged at the bottom of the transverse telescopic channel (9); one end of the support head (11) abuts against the spring member (12) in the transverse telescopic channel (9), and the other end extends toward the middle concave cavity and extends out of the transverse telescopic channel (9); the extended end of the support head (11) maintains constant contact with the corresponding position of the inner concave circumferential side surface (10) of the floating rod (8) and has friction; In the initial state, the spring member (12) exerts a compressive force on the support head (11) in the direction of the central concave cavity (6), so that the floating rod (8) is floated and supported in the central concave cavity (6) by means of the lateral elastic supporting force of the support assembly. There is a lateral movement margin and a vertical movement margin between the floating rod (8) and the seat (5) for relative movement. When the seat (5) and the floating rod (8) produce lateral relative movement and / or vertical relative movement, at least one of the support assemblies can be compressed so that the seat (5) and the floating rod (8) can adapt to the relative movement between each other.

2. The bridge expansion joint structure capable of adapting to beam displacement according to claim 1 is characterized in that: The protruding end of the support head (11) is a round head structure.

3. The bridge expansion joint structure capable of adapting to beam displacement according to claim 2 is characterized in that: It also includes a vertical support member (14), wherein the vertical support member (14) forms vertical elastic support for the floating rod member (8) from the bottom of the floating rod member (8) in the middle concave cavity (6).

4. The bridge expansion joint structure capable of adapting to beam displacement according to claim 3 is characterized in that: The vertical support member (14) is a conical spring.

5. The bridge expansion joint structure capable of adapting to beam displacement according to claim 4 is characterized in that: In the horizontal direction, a connecting plate (15) and an elastic connecting belt (16) are further provided between the end of the cross-slot comb tooth plate (3) and the beam body (1) on which it is located. The connecting plate (15) clamps the elastic connecting belt (16) between the connecting plate (15) and the end of the cross-slot comb tooth plate (3) in a manner that exerts downward pressure on the end of the cross-slot comb tooth plate (3).

6. The bridge expansion joint structure capable of adapting to beam displacement according to claim 5 is characterized in that: The elastic connecting belt comprises a first vertical section and a transverse section forming an L-shape, an L-shaped support platform for receiving the L-shaped section is provided at the end of the cross-slit comb plate (3), the first vertical section is clamped and arranged between the horizontal side surface of the connecting plate (15) and the vertical side wall of the L-shaped support platform, and the transverse section is clamped and arranged between the bottom side surface of the connecting plate (15) and the bottom side wall of the L-shaped support platform.

7. The bridge expansion joint structure capable of adapting to beam displacement according to claim 6 is characterized in that: A concrete layer (17) is provided on the beam body (1), and the connecting plate (15) is connected to the concrete layer (17) by means of an elastic vibration damping device (18).

8. The bridge expansion joint structure capable of adapting to beam displacement according to claim 7 is characterized in that: The elastic vibration damping device (18) comprises a housing, a rubber vibration damping body built into the housing, and a connecting piece with one end embedded in the rubber vibration damping body and the other end extending out of the housing for fixed connection with the connecting plate (15).

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