Large-displacement vibration and noise reduction bridge expansion joint structure
By designing a large displacement vibration-reduction structure in the bridge expansion joint, the combination of rubber expansion plate and sliding bracket, combined with the self-locking mechanism and sliding support seat, the bridge expansion joint is difficult to meet vibration-reduction and large vibration-reduction and high vibration-reduction at the same time by using the combination of rubber expansion plate and sliding bracket, and combining the self-locking mechanism and sliding support seat, the bridge expansion joint is difficult to meet vibration-reduction and large vibration-reduction at the same time. The problem of displacement achieves effective noise reduction and structural stability.
Patent Information
- Application Number
- CN202420014612.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-04
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-04
AI Technical Summary
Existing bridge expansion joints are difficult to meet the problems of good vibration reduction and noise reduction performance and large expansion displacement at the same time.
A large displacement vibration-absorbing and noise-reducing bridge expansion joint structure is designed, including a displacement box, main support beam, sliding bracket, middle beam and rubber telescopic plate. The upper surface of the rubber telescopic plate is equipped with a wavy telescopic groove and the lower surface is equipped with a There is a linear telescopic groove, which pulls the rubber telescopic plate and the middle beam sliding bracket through the displacement box, and combines the self-locking mechanism and the sliding support seat to achieve support and noise reduction with large displacement.
It effectively reduces the vibration and noise when the vehicle passes, meets the expansion and contraction needs of large displacements, and improves the stability and maintainability of the structure.
Smart Images
Figure CN222206015U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of bridge equipment, in particular to a large displacement vibration and noise reduction bridge expansion joint structure. Background Art
[0002] In recent years, with the rapid and high-quality development of highways, new bridges are mostly long-span or continuous beam bridges. In addition, most sections of roads in cities use elevated projects, so the number of bridge expansion joints is increasing. Bridge expansion joints must not only compensate for the deformation between the two bridges, but also ensure that the gap formed is as small as possible to make the vehicle run as smoothly as possible. Even so, vehicles will inevitably make a lot of noise when passing through expansion joints. The reason for the noise is, on the one hand, the vibration caused by the direct impact of the wheels on the expansion joints, and on the other hand, the wheels instantly compress the air in the gap and instantly reduce the pressure, causing the air to produce oscillating sound waves, that is, air bursts.
[0003] At present, the vibration and noise reduction of bridge expansion joints are mainly achieved by changing the geometric shape of the expansion joints to avoid collisions perpendicular to the driving direction, or by adding structural measures on the basis of the original expansion joints and reducing the expansion joints, especially the surface stiffness. For example, the seam of the expansion device is designed to be wavy, so that there is always a support point between the tire and the road surface, and the transition is smooth, which can effectively absorb the impact of the vehicle tire, reduce vibration and impact force, and reduce noise. However, the above method will greatly reduce the displacement of the expansion joint, and is not suitable for bridges with large expansion displacement. Utility Model Content
[0004] The main purpose of the utility model is to provide a displacement vibration-reducing and noise-reducing bridge expansion joint structure, so as to at least solve the problem that the bridge expansion joint in the prior art cannot simultaneously meet both good vibration-reducing and noise-reducing performance and a large expansion displacement.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a large-displacement vibration-damping and noise-reducing bridge expansion joint structure, comprising: a displacement box, which comprises two groups of displacement boxes, and the two groups of displacement boxes are correspondingly installed in the reserved grooves at the ends of two adjacent sections of the bridge beam body, and the multiple displacement boxes in each group are evenly spaced along the transverse direction of the bridge; a main support beam, which comprises multiple main support beams, and the multiple main support beams are evenly spaced along the transverse direction of the bridge, and the two ends of each main support beam are relatively slidably connected to the two displacement boxes opposite to the longitudinal direction of the bridge; a sliding bracket, which comprises multiple groups of sliding brackets, and the multiple groups of sliding brackets correspond one by one to the multiple main support beams, and the multiple sliding brackets in each group can relatively slide along the longitudinal direction of the bridge and are evenly spaced and installed on the corresponding main support beam. On the support beam; middle beam, there are multiple middle beams, each of which extends along the transverse bridge direction and is correspondingly installed on multiple sliding brackets that are in a straight line along the transverse bridge direction; rubber expansion plate, the rubber expansion plate is fixedly installed on the multiple middle beams; the upper surface of the rubber expansion plate is provided with multiple wavy expansion grooves, and the lower surface of the rubber expansion plate is provided with multiple linear expansion grooves, and the multiple wavy expansion grooves and the multiple linear expansion grooves are evenly distributed along the longitudinal bridge direction; wherein, the two ends of the rubber expansion plate along the longitudinal bridge direction are correspondingly connected with two groups of displacement boxes; when the two sections of the beam body are telescopically moved along the longitudinal bridge direction, the rubber expansion plate is pulled to expand and contract through the two groups of displacement boxes and drives the multiple middle beams and the multiple sliding brackets to slide along the multiple main support beams.
[0006] Furthermore, the wave-shaped expansion groove is vertically opposite to the center beam, and the linear expansion groove is located between two adjacent center beams.
[0007] Furthermore, the large-displacement vibration-damping and noise-reducing bridge expansion joint structure also includes: a self-locking mechanism, which is extended along the longitudinal direction of the bridge and is arranged at the bottom of multiple center beams to interlock the multiple center beams, and the self-locking mechanism is used to lock two adjacent center beams when the relative displacement of the two adjacent center beams reaches a preset value.
[0008] Furthermore, the self-locking mechanism includes: a limit column, there are multiple limit columns, and the multiple limit columns are arranged one by one at the bottom of the multiple center beams along the longitudinal bridge direction; there are multiple locking rings, each locking ring is arranged on two adjacent limit columns; wherein the inner ring length of the locking ring along the longitudinal bridge direction is greater than the distance between the opposite side walls of the two adjacent limit columns.
[0009] Furthermore, there are multiple groups of self-locking mechanisms, and the multiple groups of self-locking mechanisms are evenly spaced apart along the transverse direction of the bridge.
[0010] Furthermore, a plurality of reinforcing steel bars are respectively arranged on the upper surface and the lower surface of the rubber expansion plate, and the plurality of reinforcing steel bars are evenly spaced along the longitudinal bridge direction; wherein the reinforcing steel bars on the upper surface of the rubber expansion plate are vertically opposite to the linear expansion groove; and the reinforcing steel bars on the lower surface of the rubber expansion plate are vertically opposite to the wavy expansion groove.
[0011] Furthermore, the large-displacement vibration-damping and noise-reducing bridge expansion joint structure also includes: sliding support seats, which are divided into two groups. The two groups of sliding support seats are installed one-to-one in two groups of displacement boxes; wherein the two ends of each main support beam are relatively slidably connected to the corresponding two displacement boxes through two sliding support seats opposite to each other along the longitudinal direction of the bridge.
[0012] Furthermore, the sliding support seat includes: an upper sliding support member, which can be relatively slidably abutted against the upper end surface of the main support beam; and a lower clamping support member, which can be relatively slidably abutted against the lower end surface of the main support beam; wherein the lower clamping support member is used to adjust the distance with the upper sliding support member to match the height of the main support beam.
[0013] Furthermore, the large-displacement vibration-damping and noise-reducing bridge expansion joint structure also includes: a side beam assembly, two side beam assemblies, and each side beam assembly is correspondingly arranged on two groups of sliding support seats; wherein, the two ends of the rubber expansion plate are fixedly connected to the two groups of sliding support seats through the two side beam assemblies, and when the two sections of the beam body telescope along the longitudinal direction of the bridge, the rubber expansion plate is pulled to telescope in sequence through the two groups of displacement boxes, the two groups of sliding support seats and the two side beam assemblies.
[0014] Furthermore, the side beam assembly includes: a steel section, which extends along the transverse direction of the bridge, and the upper end of the steel section is fixedly connected to the end of the rubber expansion plate; an anchor, wherein there are multiple anchors, and the multiple anchors are evenly spaced along the transverse direction of the bridge; wherein the lower end of the steel section is fixedly connected to the sliding support seat through multiple anchors.
[0015] The large-displacement vibration-damping and noise-reducing bridge expansion joint structure of the utility model technical solution comprises a displacement box, a main support beam, a sliding bracket, a middle beam and a rubber expansion plate. The displacement boxes are divided into two groups, and the two groups of displacement boxes are correspondingly installed in the reserved grooves at the ends of two adjacent sections of the bridge beam body, and the multiple displacement boxes of each group are evenly spaced along the transverse direction of the bridge; there are multiple main support beams, and the multiple main support beams are evenly spaced along the transverse direction of the bridge, and the two ends of each main support beam are relatively slidably connected to the two displacement boxes opposite to the longitudinal direction of the bridge; there are multiple groups of sliding brackets, and the multiple groups of sliding brackets correspond to the multiple main support beams one by one, and the multiple sliding brackets of each group can be relatively slidably installed in the longitudinal direction of the bridge and are evenly spaced on the corresponding main support beams; there are multiple middle beams, and each middle beam extends along the transverse direction of the bridge and is correspondingly installed on multiple sliding brackets that are in a straight line along the transverse direction of the bridge; the rubber expansion plate is fixedly installed on the multiple middle beams; the upper surface of the rubber expansion plate is provided with There are multiple wavy expansion grooves, and multiple linear expansion grooves are set on the lower surface of the rubber expansion plate. The multiple wavy expansion grooves and multiple linear expansion grooves are evenly spaced along the longitudinal bridge direction; wherein, the two ends of the rubber expansion plate along the longitudinal bridge direction are correspondingly connected with two groups of displacement boxes; when the two sections of the beam body are telescopically moved along the longitudinal bridge direction, the two groups of displacement boxes pull the rubber expansion plate to expand and contract, and drive multiple middle beams and multiple groups of sliding brackets to slide along multiple main support beams, and the multiple wavy expansion grooves and multiple linear expansion grooves of the rubber expansion plate can be expanded and contracted in sequence, and the small expansion amount of each expansion groove is accumulated into a large expansion amount. The sliding bracket and the middle beam can cooperate to play a vertical supporting role for the rubber expansion plate from multiple points along the longitudinal bridge direction, and can also meet the large displacement expansion and contraction of the beam body; and the single wavy expansion groove on the upper surface of the rubber expansion plate is very small in size, and the contact area with the wheel is large, and the vibration and air explosion generated are very small, thereby effectively reducing noise. The problem that the bridge expansion joint in the prior art cannot simultaneously meet the requirements of good vibration reduction and noise reduction performance and large expansion displacement is solved. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0017] Figure 1 It is a side schematic diagram of a large displacement vibration and noise reduction bridge expansion joint structure that can be selected according to an embodiment of the utility model;
[0018] Figure 2 It is a top view schematic diagram of a large displacement vibration and noise reduction bridge expansion joint structure that can be selected according to an embodiment of the utility model;
[0019] Figure 3 It is a partial structural schematic diagram of a rubber expansion plate of a large displacement vibration reduction and noise reduction bridge expansion joint structure that can be selected according to an embodiment of the utility model;
[0020] Figure 4 It is a side view schematic diagram of a self-locking mechanism of a large displacement vibration and noise reduction bridge expansion joint structure that can be selected according to an embodiment of the utility model;
[0021] Figure 5 It is a bottom view schematic diagram of a self-locking mechanism of a rubber expansion plate of a large displacement vibration reduction and noise reduction bridge expansion joint structure which can be selected according to an embodiment of the utility model;
[0022] Figure 6 It is a structural schematic diagram of a sliding support seat of a large displacement vibration and noise reduction bridge expansion joint structure that can be selected according to an embodiment of the utility model;
[0023] Figure 7 It is a structural schematic diagram of a side beam assembly of a large displacement vibration and noise reduction bridge expansion joint structure that can be selected according to an embodiment of the utility model;
[0024] Figure 8 It is a schematic diagram of the arrangement of a sliding bracket for a large displacement vibration and noise reduction bridge expansion joint structure that can be selected according to an embodiment of the utility model.
[0025] The above drawings include the following reference numerals:
[0026] 10. Displacement box; 20. Main support beam; 30. Sliding bracket; 40. Middle beam; 50. Rubber expansion plate; 51. Wave-shaped expansion slot; 52. Straight expansion slot; 53. Reinforced steel bar; 60. Self-locking mechanism; 61. Limiting column; 62. Locking ring; 70. Sliding support seat; 71. Upper sliding support member; 72. Lower clamping support member; 80. Side beam assembly; 81. Steel section; 82. Anchor. DETAILED DESCRIPTION
[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0028] The large displacement vibration and noise reduction bridge expansion joint structure of the utility model technical solution is as follows Figure 1 and Figure 2As shown, it includes a displacement box 10, a main support beam 20, a sliding bracket 30, a middle beam 40 and a rubber expansion plate 50. The displacement boxes 10 are divided into two groups. The two groups of displacement boxes 10 are correspondingly installed in the reserved grooves at the ends of two adjacent sections of the bridge beam body. The multiple displacement boxes 10 in each group are evenly spaced along the transverse direction of the bridge; there are multiple main support beams 20, and the multiple main support beams 20 are evenly spaced and parallel to each other along the transverse direction of the bridge. The two ends of each main support beam 20 are connected to the two displacement boxes 10 opposite to the longitudinal direction of the bridge in a relatively slidable manner; there are multiple groups of sliding brackets 30, and the multiple groups of sliding brackets 30 correspond to the multiple main support beams 20 one by one. The multiple sliding brackets 30 in each group can slide relatively along the longitudinal direction of the bridge and are evenly spaced and installed on the corresponding main support beam 20; there are multiple middle beams 40, and each middle beam 40 extends along the transverse direction of the bridge and corresponds to It is installed on a plurality of sliding brackets 30 that are in a straight line along the transverse bridge direction; the rubber expansion plate 50 is fixedly installed on a plurality of center beams 40; a plurality of wavy expansion grooves are provided on the upper surface of the rubber expansion plate 50, and a plurality of linear expansion grooves are provided on the lower surface of the rubber expansion plate 50, and the plurality of wavy expansion grooves and the plurality of linear expansion grooves are evenly spaced along the longitudinal bridge direction; wherein, the two ends of the rubber expansion plate 50 along the longitudinal bridge direction are correspondingly connected to the two groups of displacement boxes 10; when the two sections of the beam body are telescopically moved along the longitudinal bridge direction, the two groups of displacement boxes 10 pull the rubber expansion plate 50 to telescope and drive the plurality of center beams 40 and the plurality of sliding brackets 30 to slide along the plurality of main support beams 20, and the plurality of wavy expansion grooves and the plurality of linear expansion grooves of the rubber expansion plate 50 can be telescoped in sequence, and the small telescopic amount of each telescopic groove is accumulated into a large telescopic amount. The cooperation between the sliding bracket 30 and the middle beam 40 can not only provide vertical support to the rubber expansion board 50 from multiple points along the longitudinal direction of the bridge, but also meet the large displacement expansion and contraction of the beam body; and the single wave-shaped expansion groove on the upper surface of the rubber expansion board 50 is very small in size, with a large contact area with the wheel, and the vibration and air burst generated are very small, thereby effectively reducing noise. This solves the problem that the bridge expansion joint in the prior art cannot simultaneously meet the requirements of good vibration reduction and noise reduction performance and large expansion and contraction displacement.
[0029] When implementing it, Figure 1 and Figure 3 As shown, a plurality of wavy expansion grooves 51 are parallel to each other, and a plurality of linear expansion grooves 52 are parallel to each other. The number of wavy expansion grooves 51 and the number of center beams 40 are the same, each wavy expansion groove 51 is vertically opposite to the center beam 40, and each linear expansion groove 52 is located between two adjacent center beams 40. When the two sections of the bridge are telescopically moved, each wavy expansion groove 51 and each linear expansion groove 52 are telescopically moved in sequence from the two ends to the center of the rubber expansion plate 50.
[0030] Furthermore, in order to make the rubber expansion plate 50 have better longitudinal tensile structural strength and vertical support structural strength, as Figure 3As shown, a plurality of reinforcing steel bars 53 are respectively arranged on the upper surface and the lower surface of the rubber expansion plate 50. The plurality of reinforcing steel bars 53 are evenly spaced and parallel to each other in the longitudinal bridge direction and are fused with the rubber expansion plate 50 by vulcanization. The width of each reinforcing steel bar 53 in the longitudinal bridge direction is equal; the reinforcing steel bars 53 on the upper surface of the rubber expansion plate 50 are vertically opposed to the linear expansion grooves 52 up and down, thereby strengthening the longitudinal tensile structural strength at the linear expansion grooves 52 and the supporting structural strength in the vertical direction; the reinforcing steel bars 53 on the lower surface of the rubber expansion plate 50 are vertically opposed to the wavy expansion grooves 51 up and down, thereby strengthening the longitudinal tensile structural strength at the wavy expansion grooves 51 and the supporting structural strength in the vertical direction.
[0031] Optionally, the middle beam 40 is a steel section or an I-beam, which mainly plays the role of intermediate transition and support. The middle beam 40 of this embodiment adopts an I-beam, and the upper surface of each middle beam 40 is fixed to the reinforcing steel strip 53 on the lower surface of the rubber expansion plate 50 by bolt connection. The lower surface of each middle beam 40 is fixed to the upper surface of a plurality of sliding brackets 30 in a straight line along the transverse bridge direction by bolt connection.
[0032] When the two sections of the bridge beam body are telescopically moved, each wavy expansion groove 51 and each linear expansion groove 52 are telescopically moved in sequence from the two ends to the center of the rubber expansion plate 50, which may easily cause the wavy expansion groove 51 and the linear expansion groove 52 that are telescopically moved first to be too large in expansion and contraction deformation and thus be damaged; in order to make each wavy expansion groove 51 and each linear expansion groove 52 be able to be uniformly expanded and contracted, further, as Figure 2 , Figure 4 and Figure 5 As shown, the large displacement vibration and noise reduction bridge expansion joint structure also includes a self-locking mechanism 60, which is extended along the longitudinal direction of the bridge and is arranged at the bottom of multiple center beams 40 to interlock the multiple center beams 40. The self-locking mechanism 60 is used to lock the two adjacent center beams 40 when the relative displacement of the two adjacent center beams 40 reaches a preset value, thereby limiting the maximum expansion and contraction deformation of the wavy expansion grooves 51 and the straight expansion grooves 52, so that each wavy expansion groove 51 and each straight expansion groove 52 can be evenly expanded and deformed regardless of the order of expansion and deformation.
[0033] Specifically, the self-locking mechanism 60 includes a limit column 61 and a locking ring 62. There are multiple limit columns 61 and locking rings 62. The multiple limit columns 61 are arranged one by one at the bottom of the multiple center beams 40 along the longitudinal bridge direction and are located between two adjacent groups of sliding brackets 30; each locking ring 62 is sleeved on two adjacent limit columns 61, and the lower end of each limit column 61 has a circular limit plate, and the diameter of the limit plate is greater than the diameter of the limit column 61, so as to prevent the locking ring 62 from falling off the limit column 61; optionally, the opposite sides of the locking ring 62 along the transverse bridge direction are straight ribs, and the opposite sides of the locking ring 62 along the longitudinal bridge direction are semicircular ribs, and the two straight ribs The spacing between the bars matches the diameter of the limit column 61 so that the limit column 61 can slide along the two straight ribs, the radius of the two semicircular ribs matches the radius of the limit column 61, and the spacing between the farthest ends of the two semicircular ribs is greater than the spacing between the opposite side walls of the two adjacent limit columns 61, so that the two adjacent center beams 40 can move relative to each other within a predetermined range along the longitudinal bridge direction and lock each other when moving to the maximum amount. The movement range of the two adjacent center beams 40 determines the expansion and contraction deformation of the wavy expansion groove 51 and the straight expansion groove 52, thereby avoiding damage to the wavy expansion groove 51 and the straight expansion groove 52 due to excessive expansion and contraction deformation.
[0034] Since the overall size of the rubber expansion board 50 along the transverse direction is relatively large, in order to make the wavy expansion grooves 51 and the linear expansion grooves 52 at various parts of the rubber expansion board 50 along the transverse direction be able to expand and contract uniformly, optionally, as Figure 2 As shown, there are multiple groups of self-locking mechanisms 60, and the multiple groups of self-locking mechanisms 60 are evenly spaced along the transverse bridge direction. The multiple groups of self-locking mechanisms 60 can make each part of each center beam 40 along the transverse bridge direction self-lock and move at equal intervals, thereby ensuring that the wavy expansion grooves 51 and the straight expansion grooves 52 of each part of the rubber expansion plate 50 along the transverse bridge direction can be evenly expanded and deformed.
[0035] In order to make the two sets of displacement boxes 10 and the plurality of main support beams 20 slide relatively more smoothly, further, as Figure 1 and Figure 6 As shown, the large displacement vibration reduction and noise reduction bridge expansion joint structure of this embodiment also includes sliding support seats 70, which are divided into two groups, and the multiple sliding support seats 70 in each group are evenly spaced along the transverse bridge direction; the two groups of sliding support seats 70 are installed in two groups of displacement boxes 10 one by one; the two ends of each main support beam 20 are connected to the corresponding two displacement boxes 10 through two sliding support seats 70 opposite to each other along the longitudinal bridge direction so that they can slide relatively freely. In this way, each main support beam 20 can remain stable.
[0036] Specifically, each sliding support seat 70 includes an upper sliding support member 71 and a lower clamping support member 72, and the upper sliding support member 71 and the lower clamping support member 72 are respectively installed at the upper and lower parts of the front end of the displacement box 10, and the upper sliding support member 71 can be relatively slidably abutted against the upper end surface of the main support beam 20; the lower clamping support member 72 can be relatively slidably abutted against the lower end surface of the main support beam 20; the lower clamping support member 72 can adjust the distance with the upper sliding support member 71 to match the height of the main support beam 20, so that the main support beam 20 can slide relative to the upper sliding support member 71 and the lower clamping support member 72, and at the same time, the main support beam 20 can be clamped and limited in the vertical direction to ensure a stable sliding connection between the displacement box 10 and the main support beam 20.
[0037] In order to stably connect the two ends of the rubber expansion plate 50 with the two sets of displacement boxes 10 and effectively support the two ends of the rubber expansion plate 50, further, as Figure 7 As shown, the large-displacement vibration-damping and noise-reducing bridge expansion joint structure also includes a side beam assembly 80, and there are two side beam assemblies 80. Each side beam assembly 80 is correspondingly arranged on two groups of sliding support seats 70; the two ends of the rubber expansion plate 50 are fixedly connected to the two groups of sliding support seats 70 through the two side beam assemblies 80, thereby being fastened to the two groups of displacement boxes 10. When the two sections of the beam body telescope along the longitudinal bridge direction, the rubber expansion plate 50 is pulled to telescope in turn through the two groups of displacement boxes 10, the two groups of sliding support seats 70 and the two side beam assemblies 80.
[0038] Specifically, the side beam assembly 80 includes a steel section 81 and an anchor 82. The steel section 81 extends in the transverse direction of the bridge. The length of the steel section 81 matches the side length of the rubber expansion plate 50 in the transverse direction. The upper end of the steel section 81 is fixedly connected to the end of the rubber expansion plate 50. There are multiple anchors 82, and the multiple anchors 82 are evenly spaced along the transverse direction. The lower end of the steel section 81 is fixedly connected to the sliding support seat 70 through multiple anchors 82, thereby fastening the end of the rubber expansion plate 50 to the displacement box 10.
[0039] When the large displacement vibration reduction and noise reduction bridge expansion joint structure of the utility model embodiment is installed and used, a reserved groove for installing the expansion joint structure is opened at the beam, plate and abutment of the bridge, and two sets of displacement boxes 10 of the expansion joint structure of the embodiment are placed in the groove and fixed to the two sections of the beam body by concrete pouring. After installation, the top surface of the rubber expansion plate 50 is flush with the bridge deck.
[0040] When two adjacent beam sections produce relative displacement, the force is sequentially transmitted to the rubber expansion plate 50 through two groups of displacement boxes 10, two groups of sliding support seats 70 and the side beam components 80 on both sides. The rubber expansion plate 50 adapts to the displacement through shear deformation. Since the rubber expansion plate 50 is almost incompressible, it adapts to the expansion deformation through the wave-shaped expansion grooves 51 and the straight expansion grooves 52 opened on the upper and lower sides. The expansion amount of each wave-shaped expansion groove 51 and the straight expansion groove 52 is limited to a certain extent, so multiple groups of self-locking mechanisms 60 are set at the bottom of each center beam 40. When the maximum design expansion amount of a single wave-shaped expansion groove 51 or a straight expansion groove 52 is reached, the two adjacent center beams 40 are converted into a rigid connection through the mutual locking of the locking ring 62 and the limit column 61, ensuring that each wave-shaped expansion groove 51 and the straight expansion groove 52 can be uniformly expanded and deformed, avoiding damage due to the expansion amount of a single wave-shaped expansion groove 51 or a straight expansion groove 52. When the rubber expansion board 50 is expanded and deformed, the lower sliding bracket 30 is driven by the middle beam 40 to slide on the main support beam 20, thereby always supporting the rubber expansion board 50. Figure 8 As shown, the telescopic spacing of a single wavy telescopic groove 51 or a straight telescopic groove 52 of the rubber telescopic plate 50 is a fixed value. By increasing the number of wavy telescopic grooves 51 and straight telescopic grooves 52 and the number of middle beams 40, adjusting the length of the main support beam 20 and the number of each group of sliding brackets 30, the total displacement of the expansion joint structure is changed to meet the requirements of a larger telescopic displacement. Theoretically, the telescopic displacement of the expansion joint structure can be infinitely increased according to this structure.
[0041] When the wheel of the vehicle passes through the expansion joint structure at high speed, the wheel surface is always at an angle with each wave-shaped expansion groove 51 on the rubber expansion plate 50, which can fully reduce the noise of the tire impacting the expansion joint structure. On the other hand, since the rubber expansion plate 50 is made of flexible material, it has better buffering and noise reduction effects than steel.
[0042] The large displacement vibration and noise reduction bridge expansion joint structure of the utility model embodiment has the following advantages:
[0043] 1. The multiple wavy expansion grooves and the multiple linear expansion grooves of the rubber expansion plate of this embodiment can be expanded and contracted in sequence, and the small expansion amount of each expansion groove is accumulated into a large expansion amount, which can not only play a vertical supporting role for the rubber expansion plate from multiple points along the longitudinal bridge direction, but also meet the large displacement expansion and contraction of the beam body; and the single wavy expansion groove on the upper surface of the rubber expansion plate is very small in size, and has a large contact area with the wheel, and the vibration and air burst generated are very small, thereby effectively reducing noise;
[0044] 2. Each component adopts an assembled structure, which can be partially replaced or repaired to restore the original installation state when it is damaged by a destructive disaster, which is more economical;
[0045] 3. The middle beam 40, the sliding bracket 30, the main support beam 20 and the displacement box 10 can be selected according to the characteristics of the beams to achieve the design goal of extending the life of the expansion joint and reducing the maintenance cost.
[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A large displacement vibration and noise reduction bridge expansion joint structure, characterized in that: include: Displacement boxes (10), the displacement boxes (10) are in two groups, the two groups of displacement boxes (10) are correspondingly installed in the reserved grooves at the ends of two adjacent sections of the bridge beam, and the plurality of displacement boxes (10) in each group are evenly spaced apart in the transverse direction of the bridge; A main support beam (20), wherein the main support beam (20) is multiple, and the multiple main support beams (20) are evenly spaced along the transverse direction of the bridge, and the two ends of each main support beam (20) are connected to the two displacement boxes (10) opposite to each other in the longitudinal direction of the bridge in a relatively slidable manner; Sliding brackets (30), the sliding brackets (30) are multiple groups, the multiple groups of sliding brackets (30) correspond to the multiple main support beams (20) one by one, and the multiple sliding brackets (30) in each group can slide relatively along the longitudinal bridge direction and are evenly spaced and installed on a corresponding main support beam (20); A middle beam (40), wherein the middle beam (40) is a plurality of beams, each of the middle beams (40) extending in a transverse bridge direction and correspondingly mounted on a plurality of the sliding brackets (30) in a straight line in the transverse bridge direction; A rubber expansion plate (50), wherein the rubber expansion plate (50) is fixedly mounted on the plurality of center beams (40); a plurality of wavy expansion grooves (51) are provided on the upper surface of the rubber expansion plate (50), and a plurality of linear expansion grooves (52) are provided on the lower surface of the rubber expansion plate (50), wherein the plurality of wavy expansion grooves (51) and the plurality of linear expansion grooves (52) are evenly spaced and distributed along the longitudinal bridge direction; The two ends of the rubber expansion plate (50) along the longitudinal bridge direction are correspondingly connected to the two groups of displacement boxes (10); when the two sections of the beam body are telescopically moved along the longitudinal bridge direction, the two groups of displacement boxes (10) pull the rubber expansion plate (50) to expand and contract and drive the plurality of middle beams (40) and the plurality of sliding brackets (30) to slide along the plurality of main support beams (20).
2. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 1 is characterized in that: The wave-shaped expansion groove (51) is vertically opposed to the middle beam (40), and the linear expansion groove (52) is located between two adjacent middle beams (40).
3. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 2 is characterized in that: The large displacement vibration and noise reduction bridge expansion joint structure also includes: A self-locking mechanism (60) is provided at the bottom of the plurality of center beams (40) extending along the longitudinal direction of the bridge so as to interlock the plurality of center beams (40) with each other, and the self-locking mechanism (60) is used to lock the two adjacent center beams (40) when the relative displacement of the two adjacent center beams (40) reaches a preset value.
4. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 3 is characterized in that: The self-locking mechanism (60) comprises: A limiting column (61), wherein the limiting columns (61) are multiple, and the multiple limiting columns (61) are arranged one by one at the bottom of the multiple middle beams (40) along the longitudinal bridge direction; A locking ring (62), wherein the locking ring (62) is multiple, and each locking ring (62) is sleeved on two adjacent limiting pillars (61); Wherein, the inner ring length of the locking ring (62) along the longitudinal bridge direction is greater than the distance between the opposite side walls of two adjacent limiting pillars (61).
5. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 3 is characterized in that: The self-locking mechanisms (60) are multiple groups, and the multiple groups of self-locking mechanisms (60) are evenly spaced and arranged along the transverse bridge direction.
6. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 2 is characterized in that: A plurality of reinforcing steel bars (53) are respectively arranged on the upper surface and the lower surface of the rubber expansion plate (50), and the plurality of reinforcing steel bars (53) are evenly spaced along the longitudinal bridge direction; The reinforcing steel strip (53) on the upper surface of the rubber expansion plate (50) is vertically opposed to the linear expansion groove (52); and the reinforcing steel strip (53) on the lower surface of the rubber expansion plate (50) is vertically opposed to the wavy expansion groove (51).
7. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 1 is characterized in that: The large displacement vibration and noise reduction bridge expansion joint structure also includes: Sliding support seats (70), the sliding support seats (70) being in two groups, and the two groups of sliding support seats (70) being installed in the two groups of displacement boxes (10) in a one-to-one correspondence; Wherein, the two ends of each main support beam (20) are connected to the corresponding two displacement boxes (10) in a relatively slidable manner via two sliding support seats (70) that are opposite to each other along the longitudinal bridge direction.
8. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 7 is characterized in that: The sliding support seat (70) comprises: An upper sliding support member (71), the upper sliding support member (71) being in relative sliding contact with the upper end surface of the main support beam (20); A lower clamping support member (72), the lower clamping support member (72) is in relative sliding contact with the lower end surface of the main support beam (20); Wherein, the lower clamping support member (72) is used to adjust the distance between the lower clamping support member (72) and the upper sliding support member (71) to match the height of the main support beam (20).
9. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 7 is characterized in that: The large displacement vibration and noise reduction bridge expansion joint structure also includes: Side beam assemblies (80), wherein there are two side beam assemblies (80), and each side beam assembly (80) is correspondingly arranged on two groups of sliding support seats (70); Wherein, the two ends of the rubber expansion plate (50) are fixedly connected to the two groups of sliding support seats (70) through the two side beam assemblies (80), and when the two sections of the beam body are telescopically moved along the longitudinal bridge direction, the rubber expansion plate (50) is pulled to expand and contract through the two groups of displacement boxes (10), the two groups of sliding support seats (70) and the two side beam assemblies (80) in sequence.
10. The large displacement vibration and noise reduction bridge expansion joint structure according to claim 9 is characterized in that: The side beam assembly (80) comprises: A steel section (81), the steel section (81) extending in a transverse direction, the upper end of the steel section (81) being fixedly connected to the end of the rubber expansion plate (50); Anchors (82), the anchors (82) being multiple, and the multiple anchors (82) being evenly spaced apart in the transverse direction of the bridge; Wherein, the lower end of the steel section (81) is fixedly connected to the sliding support seat (70) via a plurality of anchoring pieces (82).