Noise reduction profiled extension device

Abstract

The utility model provides a kind of noise reduction curve type telescopic device, belong to bridge expansion joint structure technical field, including two respectively anchoring in two opposite beam end rigid support body, and be located between two rigid support body flexible filler body;Rigid support body includes bottom plate and edge beam, bottom plate is poured in one of beam end, and expansion joint is formed between the bottom plate of two rigid support bodies;Edge beam is fixed to bottom plate and vertically extends upward, and filling gap is formed between the edge beam of two rigid support bodies, and flexible filler body is located in filling gap;Wherein, the edge beam of two rigid support bodies has mutually matched first curve profile towards the side of filling gap, and has mutually matched second curve profile away from the side of filling gap, and first curve profile and second curve profile are different.The noise reduction curve type telescopic device provided by the utility model fills flexible filler body between two edge beams, improves the effective life of telescopic device and reduces processing cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of bridge expansion joint structure, specifically relating to a noise-reducing curved expansion device. Background Technology

[0002] As a crucial component of bridges, bridge expansion joints have a profound impact on the transportation industry during daily use. Generally speaking, bridge expansion joints currently used in bridge construction and operation can be broadly categorized into two main types: modular expansion joints and comb-plate expansion joints. However, considering the current structure and operation of these two main types, both require rubber waterstops to seal the expansion joints. This leads to the easy accumulation of dust and debris in the space above the waterstop, accelerating the aging of the rubber waterstop. Sharp stones, in particular, can easily cause premature damage, failing to meet the expected service life. Furthermore, the compressed airflow generated in this space when vehicles pass contributes to road noise. In addition, current structures also suffer from significant material waste and high manufacturing costs during processing. Utility Model Content

[0003] This utility model provides a noise-reducing curved telescopic device, which aims to improve the effective life of the telescopic device and reduce processing costs.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a noise-reducing curved telescopic device is provided, comprising two rigid supports respectively anchored to the ends of two opposite beams, and a flexible filler disposed between the two rigid supports; the rigid support includes a base plate and a side beam, the base plate is cast at one end of one of the beams, and an expansion joint is formed between the base plates of the two rigid supports; the side beam is fixed to the base plate and extends vertically upward, and a filling joint is formed between the side beams of the two rigid supports, with the flexible filler disposed within the filling joint; Among them, the side beams of the two rigid supports have a first curved profile that matches each other on the side facing the filling joint, and a second curved profile that matches each other on the side away from the filling joint. The first curved profile and the second curved profile are different.

[0005] In one possible implementation, the top surface of the flexible infill is lower than the top surface of the side beam, and the bottom surface is higher than the upper surface of the base plate. The top surface of the side beam is lower than or flush with the road surface.

[0006] In some embodiments, the width of the filling joint is greater than that of the expansion joint, and the base plates of the two rigid supports form support platforms at the locations between the two side beams.

[0007] For example, the rigid support also includes a vertical plate, which is fixed to the base plate and extends downward, and is cast and fixed to the beam end.

[0008] For example, the rigid support also includes several anchor plates spaced apart along the width of the bridge, each anchor plate being cast and fixed inside the beam end; wherein each anchor plate is fixedly connected to the side of the vertical plate away from the expansion joint, and is also fixedly connected to the bottom plate.

[0009] In one possible implementation, each anchor plate is cast inside the beam end and connected to the pre-embedded reinforcement inside the beam end.

[0010] In some embodiments, the flexible filler is a polymeric elastomer.

[0011] For example, the noise reduction curved expansion joint also includes a number of displacement control boxes arranged at intervals along the width of the bridge, and at least one intermediate beam; the intermediate beam extends in the filling joint and is supported on the displacement control boxes; wherein, flexible fillers are provided between each pair of intermediate beams and between the intermediate beam and the two side beams.

[0012] In some embodiments, two beam ends are provided with cast-in-place concrete bodies, and a rigid support body is cast and fixed to the cast-in-place concrete bodies.

[0013] The beneficial effects of the noise reduction curved telescopic device provided by this utility model are as follows: Compared with the prior art, the noise reduction curved telescopic device of this utility model has two rigid supports anchored to the two opposite beam ends, and an expansion joint is formed between the bottom plates of the two rigid supports to provide expansion and contraction for the two beams. On this basis, a filling joint is formed between the side beams of the two rigid supports. By setting a flexible filler in the filling joint, the expansion joint is sealed and waterproofed. Since the flexible filler can occupy the internal space of the filling joint, it can avoid the accumulation of dust and garbage, thereby improving the effective service life of the flexible filler. At the same time, it can also prevent air from entering the filling joint and expansion joint and generating airflow noise during driving, thereby improving the noise reduction performance and reducing driving noise.

[0014] Using matching first and second curve profiles for the two side beams facilitates unified processing, reduces processing costs, and improves processing efficiency. At the same time, differentiating the first and second curve profiles facilitates the layout of the fabric during the cutting and forming process, thereby reducing material waste and lowering production costs.

[0015] Furthermore, the differentiated design of the first and second curve profiles allows the thicker area between them to be impacted first when a vehicle passes by, thereby improving the local strength of the curved structure in the area subjected to live load impact. Attached Figure Description

[0016] Figure 1 A top view of the noise reduction curved telescopic device provided in this embodiment of the utility model; Figure 2This is a schematic diagram of the edge contour of the side beam used in the embodiment of this utility model; Figure 3 For along Figure 1 (A schematic diagram of the cross-sectional structure of the AA line in the tensile state of the flexible filler); Figure 4 for Figure 3 A magnified view of the structure at point B in the middle; Figure 5 This is a schematic diagram of the free state of the flexible filler used in the embodiments of this utility model; Figure 6 This is a schematic diagram of the compressed state of the flexible filler used in the embodiments of this utility model; Figure 7 A top view of the structure of a noise reduction curved telescopic device (both beam ends not shown) provided in another embodiment of the present utility model; Figure 8 For along Figure 7 Schematic diagram of the cross-sectional structure of the middle CC line; Figure 9 For along Figure 7 (After adding the two beam ends) sectional view of the DD line.

[0017] In the diagram: 10. Rigid support; 101. Expansion joint; 102. Filling joint; 103. Support platform; 11. Base plate; 12. Side beam; 121. First curve profile; 122. Second curve profile; 13. Vertical plate; 14. Anchor plate; 20. Flexible filler; 201. Concave arc surface; 202. Arched arc surface; 30. Displacement control box; 40. Intermediate beam; 50. Beam end; 51. Embedded reinforcement; 52. Cast-in-place concrete. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0020] In existing technologies, rubber waterstops are connected in a V-shape or W-shape within expansion joints to accommodate changes in joint width. When road dust and particles, especially sharp stones, fall into the expansion joint, they are trapped by the rubber waterstop. With the continuous expansion and contraction of the joint, the rubber waterstop is easily damaged by the abrasion from dust particles and the punctures from sharp stones, leading to waterproofing failure. Under normal circumstances, the natural aging cycle of rubber waterstops is about ten years, but in actual operation, due to the aforementioned wear and tear, their effective service life is only two to three years. Frequent replacement of rubber waterstops is a common phenomenon in current expansion joint structures.

[0021] Please refer to the following: Figures 1 to 9 The noise reduction curved telescopic device provided by this utility model will now be described. The noise reduction curved telescopic device includes two rigid support bodies 10 respectively anchored to two opposite beam ends 50, and a flexible filler body 20 disposed between the two rigid support bodies 10; the rigid support body 10 includes a base plate 11 and a side beam 12, the base plate 11 is cast at one of the beam ends 50, and an expansion joint 101 is formed between the base plates 11 of the two rigid support bodies 10; the side beam 12 is fixed to the base plate 11 and extends vertically upward, and a filling joint 102 is formed between the side beams 12 of the two rigid support bodies 10, and the flexible filler body 20 is disposed in the filling joint 102; wherein, the side beams 12 of the two rigid support bodies 10 have a matching first curved profile 121 on the side facing the filling joint 102, and a matching second curved profile 122 on the side away from the filling joint 102, and the first curved profile 121 and the second curved profile 122 are different.

[0022] It should be noted that in this embodiment, the flexible filler 20 replaces the waterproof sealing function of the rubber waterstop for the expansion joint 101 in the prior art. Specifically, the flexible filler 20 can be made of a polymer elastomer. Polymer materials have good cold resistance and corrosion resistance, which can meet the application requirements of cold regions. Its specific performance should meet the technical parameters given in Table 1 below: Table 1 Technical Parameters of Polymer Elastomers

[0023] It should be understood that the flexible filler 20 and the rigid support 10, which serve as the seam wall of the filling seam 102, can be bonded together to ensure the bonding and sealing.

[0024] The function of the expansion joint 101 is to accommodate the change in gap between the two beam ends 50 and to determine the amount of expansion and contraction. The space above the expansion joint 101 is used as a filling joint 102 and a flexible filler 20 is installed therein. When the width of the expansion joint 101 increases, the flexible filler 20 forms a stretched state with its middle part concave to the upper and lower sides based on the tension on both sides of the filling joint 102, thereby adapting to the increase in the width of the expansion joint 101. When the width of the expansion joint 101 decreases, the flexible filler 20 is compressed in the width direction, causing its middle part to expand and deform to the upper and lower sides. During this process, dust particles falling into the concave surface of the flexible filler 20 during the stretching process are ejected, thereby preventing the long-term accumulation of dust and debris on the flexible filler 20 and accelerating its aging rate.

[0025] Since the flexible filler 20 is fully filled in the filling joint 102 and has sufficient thickness to resist puncture, it can prevent sharp stones from falling on the surface of the elastomer and being punctured by the tire when the vehicle passes by. Compared with the thin rubber waterstop, it has more puncture resistance, thus ensuring the long-term effectiveness of its waterproof sealing performance, improving its effective service life, and extending the normal service cycle.

[0026] It should be explained that in this embodiment, the extension shape of the expansion joint 101 can be a curved extension structure formed based on the first curved profile 121 of the two side beams 12 approaching each other. The specific curve form can be corrugated, comb-shaped, or other curves, which are not specifically limited here.

[0027] Combination Figure 2 From the perspective of processing the side beam 12, laser cutting is the primary method used. The contours of the two edges of the side beam 12 determine the arrangement of raw materials, such as steel plates, during processing. If the first curve contour 121 and the second curve contour 122 are completely identical, laser cutting will not only result in numerous repeated cuts but also waste material. Therefore, in this embodiment, by differentiating the first curve contour 121 and the second curve contour 122, the aforementioned processing problems are avoided, which helps reduce waste and lower costs.

[0028] Compared with the prior art, the noise reduction curve-type telescopic device provided in this embodiment has two rigid support bodies 10 anchored to two opposite beam ends 50 respectively. An expansion joint 101 is formed between the bottom plates 11 of the two rigid support bodies 10 to provide expansion and contraction for the two beams. On this basis, a filling joint 102 is formed between the side beams 12 of the two rigid support bodies 10. A flexible filler 20 is set in the filling joint 102 to form a seal and waterproof for the expansion joint 101. Since the flexible filler 20 can occupy the internal space of the filling joint 102, it can avoid the accumulation of dust and garbage, thereby improving the effective service life of the flexible filler 20. At the same time, it can also prevent air from entering the filling joint 102 and the expansion joint 101 and generating airflow noise during driving, thereby improving the noise reduction performance and reducing driving noise.

[0029] The base plate 11 and the edge beam 12 can be fixed by fastening with connectors or by welding. Welding is preferred to avoid instability caused by aging and failure of connectors. The base plate 11 extends into the beam end 50 to improve the reliability of the pouring and fixing, thereby providing sufficient support for the edge beam 12. The edge beam 12 can be tightly attached to the end face of the beam end 50 to achieve bonding and fixing with the concrete of the beam end 50, thereby ensuring its load-bearing capacity in the width direction of the expansion joint 101.

[0030] The side beam 12 is positioned on the base plate 11 close to the extended end of the base plate 11 but not aligned with the extended end of the base plate 11. This allows the center of the filling joint 102 at the extended end of the base plate 11 to protrude from the side wall of the side beam 12, thus serving as a support platform 103 to support the flexible filler 20. The structure is simple and reliable.

[0031] It should be understood that, for the filling gap 102 of the curved extension, both the base plate 11 and the side beam 12 can be formed by CNC cutting of steel plates or by stamping of steel profiles. Cutting is preferred here, as it is not only convenient to process, but also simpler and more accurate to control the dimensional accuracy, and more economical.

[0032] Using a matching first curve profile 121 and a second curve profile 122 for the two side beams 12 facilitates unified processing, reduces processing costs, and improves processing efficiency. At the same time, differentiating the first curve profile 121 and the second curve profile 122 facilitates the layout of the fabric during the cutting and forming process, thereby reducing material waste and lowering production costs.

[0033] In addition, combined Figure 2 It is understood that, since the vehicle first impacts the thicker part of the side beam when it passes, the differentiated design of the first curve profile 121 and the second curve profile 122 can improve the local strength of the curved structure when subjected to live load impact.

[0034] As a preferred embodiment, the aforementioned filling joint 102 extends in a curve along the width direction of the bridge. The curve extension can be along a sine or cosine curve, or along a corrugated serpentine curve or a comb-shaped curve (equivalent to the joint formed by a comb-plate type expansion joint in the prior art), and is not specifically limited here. It should be understood that the extension path of the flexible filler 20 within the filling joint 102 should also be consistent with the filling joint 102.

[0035] Compared to a straight line, the curved extension of the filler seam 102 allows for a time difference between the left and right tires passing through the top gap of the telescopic device, thereby reducing vehicle bounce vibration and noise and improving driving comfort. Furthermore, the curved extension of the filler seam 102 increases the contact area between the flexible filler 20 and the seam wall, thus improving overall bending resistance and effectively resisting the impact of vehicle traffic on the rigid support 10, thereby enhancing structural stability and service life.

[0036] As a modified embodiment of the flexible filler 20 described above, please refer to Figures 4 to 6 The upper and lower surfaces of the flexible filler 20 are planar under normal conditions. When the flexible filler 20 is in a stretched state, its top surface forms a concave arc surface 201 in the filling joint 102, and its bottom surface forms an upward arched arc surface 202 in the filling joint 102. The curvature of the upward arched arc surface 202 is consistent with that of the concave arc surface 201. When the flexible filler 20 is in a compressed state, the middle part of its top surface convexes upward and the middle part of its bottom surface convexes downward.

[0037] The flexible filler 20 forms a mirror structure in the upper and lower thickness directions, which enables the internal stress of the flexible filler 20 to be consistent with the width direction of the filling gap 102. During the process of stretching or compressing the flexible filler 20 due to the change in the width of the filling gap 102, the stress balance and stretching deformation stability of the flexible filler 20 are guaranteed, thereby reducing the probability of damage or breakage of the flexible filler 20 and helping to improve its effective service life.

[0038] It should be noted that, as Figure 5 As shown, the top surface of the flexible filler 20 is lower than the top surface of the side beam 12, and the bottom surface is higher than the upper surface of the base plate 11. The top surface of the side beam 12 is lower than or flush with the road surface. The fact that the top surface of the flexible filler 20 is lower than the top surface of the side beam 12 prevents the flexible filler 20 from protruding above the road surface when the expansion joint 101 contracts and the filling joint 102 squeezes it. This avoids damage to the flexible filler 20 caused by direct tire pressure during vehicle operation, thus further extending the effective service life of the flexible filler 20.

[0039] For some possible implementations, please refer to [link / reference]. Figures 4 to 6The width of the filling joint 102 is greater than that of the expansion joint 101, and the base plates 11 of the two rigid supports 10 respectively form support platforms 103 at the locations between the two side beams 12.

[0040] The wider filling gap 102 compared to the expansion joint 101 provides more filling space, thus ensuring that the flexible filler 20 has sufficient deformation in the width direction of the expansion joint 101, avoiding excessive stretching or compression of the flexible filler 20 and affecting its reliable lifespan. In addition, the width difference between the filling gap 102 and the expansion joint 101 allows the two sides of the filling gap 102 to form a support platform 103. The support platform 103 can support the bottom sides of the flexible filler 20, thereby preventing the connection between the flexible filler 20 and the joint wall from failing due to tire contact and compression of the edge of the flexible filler 20 during driving. This ensures the connection stability between the flexible filler 20 and the rigid support 10 and the reliability of the waterproof sealing of the expansion joint 101 by the flexible filler 20.

[0041] In some embodiments, such as Figure 3 As shown, the rigid support 10 also includes a vertical plate 13, which is fixed to the base plate 11 and extends downwards. The vertical plate 13 is cast and fixed to the beam end 50. The vertical plate 13 and the base plate 11 can be fixed using connectors or welding, with welding being preferred to avoid the problem of connector aging and failure affecting connection reliability. By setting the downward-extending vertical plate 13 and fixing it to the base plate 11, the casting and fixing area on the beam end 50 can be further increased, improving the casting and fixing reliability with the beam end 50.

[0042] Based on the above, please refer to Figure 3 The rigid support 10 also includes several anchor plates 14 spaced apart along the width of the bridge. Each anchor plate 14 is cast and fixed inside the beam end 50. Each anchor plate 14 is fixedly connected to the side of the vertical plate 13 away from the expansion joint 101 and is also fixedly connected to the bottom plate 11.

[0043] The anchor plate 14 can be vertically welded to the inside corner formed by the base plate 11 and the vertical plate 13. On the one hand, it can improve the overall structural strength of the rigid support 10, and on the other hand, it increases the casting position inside the beam end 50, which helps to improve the connection strength and reliability, thereby improving the connection stability of the rigid support 10 at the beam end 50.

[0044] It is necessary to understand that, such as Figure 3 As shown, in this embodiment, each anchor plate 14 is cast inside the beam end 50 and connected to the pre-embedded reinforcement 51 inside the beam end 50.

[0045] Each anchor plate 14 is set at the position of the embedded bar 51 inside the beam end 50. Each anchor plate 14 can be connected to one of the embedded bars 51 by welding. In this way, the load of the rigid support 10 is transferred to the embedded bar 51, thereby avoiding excessive stress on the concrete of the end beam and causing it to loosen and break. This is beneficial to improving the load capacity of the rigid support 10 and the service life of the overall structure.

[0046] Please see Figures 7 to 9 As a variation of the above-mentioned noise reduction curved expansion joint, the noise reduction curved expansion joint further includes a plurality of displacement control boxes 30 arranged at intervals along the width direction of the bridge, and at least one intermediate beam 40; the intermediate beam 40 extends in the shape of the filling joint 102 and is supported on the displacement control box 30; wherein, flexible fillers 20 are provided between each pair of intermediate beams 40 and between intermediate beams 40 and two side beams 12.

[0047] Since the flexible filler 20 itself does not have the ability to directly withstand vehicle rolling pressure, when the size of the expansion joint 101 designed according to the actual situation is large, it is necessary to add a middle beam 40. The filling joint 102 is divided by the middle beam 40, and flexible fillers 20 are set on both sides of the middle beam 40. At the same time, the displacement control box 30 provides support for the middle beam 40. In this way, when the vehicle passes over, the middle beam 40 can provide rolling support for the tire, thereby preventing the tire from pressing excessively into the filling joint 102 and squeezing the flexible filler 20. This not only ensures the normal service life of the flexible filler 20, but also reduces driving vibration and noise, and ensures driving comfort.

[0048] It should be explained here that the displacement control box 30 is a commonly used component in bridge expansion joints. It is a specially constructed box structure that contains components such as bearing supports and shock absorbers internally, and is usually composed of a steel box body externally. It can provide lateral restraint after supporting the load. As this is existing technology, it will not be described in detail here.

[0049] It is important to understand that you should refer to [the relevant documentation / reference]. Figure 8 and Figure 9 Two beam ends 50 are respectively provided with cast-in-place concrete bodies 52, and rigid support bodies 10 are cast and fixed to the cast-in-place concrete bodies 52.

[0050] During installation, the pre-reserved installation slot at the beam end 50 can be cleaned first to expose the embedded reinforcing bars 51 embedded inside. Then, the rigid support 10 is fixed to the beam end 50 with the help of the embedded reinforcing bars 51, and then concrete is poured on site. Finally, a structural form is formed in which the rigid support 10 is poured on the cast-in-place concrete body 52. ​​The construction is simple and convenient.

[0051] Based on the above, the noise reduction curve-type telescopic device provided in this embodiment performs cold galvanizing on all surfaces of the rigid support 10 or the parts exposed outside the beam end 50, and coats the cold galvanized layer with a compatible sealant or weather-resistant topcoat to form a composite coating system. This can further improve the protective effect and appearance durability compared with the traditional surface painting anti-corrosion method.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A noise-reducing curved telescopic device, characterized in that, It includes two rigid supports anchored to the ends of two opposite beams, and a flexible filler disposed between the two rigid supports; The rigid support includes a base plate and side beams. The base plate is cast at one end of one of the beams, and an expansion joint is formed between the base plates of the two rigid supports. The side beam is fixed to the base plate and extends vertically upward. A filling gap is formed between the side beams of the two rigid supports, and the flexible filler is disposed in the filling gap. The two rigid supports have matching first curve profiles on the side facing the filling joint and matching second curve profiles on the side away from the filling joint, wherein the first curve profile and the second curve profile are different.

2. The noise-reducing curved telescopic device as described in claim 1, characterized in that, The top surface of the flexible filler is lower than the top surface of the side beam, and the bottom surface is higher than the upper surface of the base plate. The top surface of the side beam is lower than or flush with the road surface.

3. The noise-reducing curved telescopic device as described in claim 1, characterized in that, The width of the filling joint is greater than that of the expansion joint, and the base plates of the two rigid supports respectively form support platforms at the locations between the two side beams.

4. The noise-reducing curved telescopic device as described in claim 1, characterized in that, The rigid support also includes a vertical plate, which is fixed to the base plate and extends downwards. The vertical plate is cast and fixed to the beam end.

5. The noise-reducing curved telescopic device as described in claim 4, characterized in that, The rigid support also includes a number of anchor plates spaced apart along the width of the bridge, each of which is cast and fixed inside the beam end; wherein each of the anchor plates is fixedly connected to the side of the vertical plate away from the expansion joint, and is also fixedly connected to the base plate.

6. The noise-reducing curved telescopic device as described in claim 5, characterized in that, Each of the anchor plates is cast inside the beam end and connected to the pre-embedded reinforcement inside the beam end.

7. The noise-reducing curved telescopic device as described in any one of claims 1-6, characterized in that, The flexible filler is a polymeric elastomer.

8. The noise-reducing curved telescopic device as described in any one of claims 1-6, characterized in that, The noise-reducing curved expansion joint also includes a number of displacement control boxes arranged at intervals along the width of the bridge, and at least one intermediate beam; the intermediate beam extends in the filling joint and is supported on the displacement control boxes; wherein, the flexible filler is provided between each pair of intermediate beams and between the intermediate beam and the two side beams.

9. The noise-reducing curved telescopic device as described in any one of claims 1-6, characterized in that, Two beam ends are provided with cast-in-place concrete bodies, and the rigid support body is cast and fixed to the cast-in-place concrete bodies.

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