Noise reduction bridge expansion joint

Abstract

The utility model relates to related technical field of bridge engineering especially, and it is a kind of noise reduction bridge expansion joint, including receiving part, clamping groove, U type damping rubber part, connecting section bar, noise reduction layer, end connecting piece and elastic part, two groups are oppositely equipped with receiving part, the clamping groove is opened in receiving part inside, U type damping rubber part is equipped with between the two groups receiving part in cooperation with clamping groove, the connecting section bar is filled in U type damping rubber part both sides, the noise reduction layer is integrally formed with U type damping rubber part upper layer part.The utility model is through the composite structure of upper microperforation layer, honeycomb core layer and lower microperforation layer, and upper and lower microperforation layer carries out reflection and preliminary absorption to high frequency noise by the micro hole of staggered distribution, and the hexagonal hollow structure of honeycomb core layer provides multiple scattering path for noise, substantially consumes low frequency noise energy, realizes multi-band noise attenuation, significantly improves bridge periphery sound environment.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge engineering, and in particular to a noise-reducing bridge expansion joint. Background Technology

[0002] As a key component connecting bridge beams and abutments, bridge expansion joints have the core function of adapting to the expansion and contraction deformation of bridges caused by factors such as temperature changes, loads, and concrete shrinkage and creep, and preventing cracking and damage to the beam structure due to stress concentration. Therefore, a noise-reducing bridge expansion joint is particularly needed.

[0003] Traditional expansion joints often use pure metal splicing or simple rubber filling structures, lacking targeted noise reduction design. When vehicles drive over them, the impact between the wheels and the expansion joint, as well as the friction of components caused by the expansion and contraction of the beam, will generate high-frequency vibration noise. Heavy-duty vehicles will also add low-frequency vibration noise. This type of noise is particularly noticeable in urban bridges and highway bridges near residential areas. It not only disturbs the daily lives of surrounding residents, but also causes auditory fatigue in drivers and increases traffic safety hazards.

[0004] To address the aforementioned issues, a noise-reducing bridge expansion joint is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a noise-reducing bridge expansion joint to solve the problems of existing noise-reducing bridge expansion joints mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a noise-reducing bridge expansion joint, comprising a receiving component, a slot, a U-shaped damping rubber component, a connecting profile, a noise-reducing layer, an end connector, and an elastic component. The receiving component is provided in two sets opposite to each other. The slot is opened inside the receiving component. The U-shaped damping rubber component is provided between the two sets of receiving components in cooperation with the slot. The connecting profile is filled on both sides of the U-shaped damping rubber component. The noise-reducing layer is integrally formed with the upper part of the U-shaped damping rubber component. The noise reduction layer includes an upper micro-perforated layer, a honeycomb core layer, and a lower micro-perforated layer, with the upper micro-perforated layer and the lower micro-perforated layer located on opposite sides of the honeycomb core layer.

[0007] Preferably, the two sides of the U-shaped damping rubber component are slatted, the slot is a slatted groove, and the two side walls of the U-shaped damping rubber component are tightly fitted to the inner wall of the slot.

[0008] Preferably, the connecting profile is made of a rigid material, and its outer side is fixedly connected to the inner wall of the U-shaped damping rubber component.

[0009] Preferably, the micropore diameter of the upper and lower microperforated layers is 0.5-2 mm, the micropore spacing is 3-8 mm, and the micropores of the two layers are staggered.

[0010] Preferably, the honeycomb core layer has a regular hexagonal structure with a pore diameter of 5-15 mm and a wall thickness of 0.3-1 mm, and the thickness of the honeycomb core layer is 3-8 times the thickness of the upper micro-perforated layer and the lower micro-perforated layer.

[0011] Preferably, the end connector has an L-shaped structure, with one end integrally formed with the end of the receiving member, and the other end extending into the bridge structure and connected to the bridge embedded part.

[0012] Preferably, the elastic element is spaced apart between the two sets of receiving elements along the length direction of the receiving element.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. The noise reduction layer of the device adopts a composite structure of upper micro-perforated layer, honeycomb core layer and lower micro-perforated layer. The upper and lower micro-perforated layers reflect and initially absorb mid-to-high frequency noise through staggered micropores. The regular hexagonal hollow structure of the honeycomb core layer provides multiple scattering paths for noise, greatly consumes low frequency noise energy, realizes multi-band noise attenuation, and significantly improves the sound environment around the bridge. 2. The U-shaped damping rubber component adopts a slatted design on both sides, which fits tightly with the slatted groove on the inner side of the receiving component, effectively preventing the rubber component from shifting laterally when the bridge expands and contracts. At the same time, the connecting profile fills both sides of the U-shaped damping rubber component to provide rigid support for the rubber component and prevent it from deforming excessively. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A; Figure 4 This is an exploded structural diagram of the noise reduction layer of this utility model.

[0015] In the diagram: 1. Receiving component; 2. Slot; 3. U-shaped damping rubber component; 4. Connecting profile; 5. Noise reduction layer; 501. Upper micro-perforated layer; 502. Honeycomb core layer; 503. Lower micro-perforated layer; 6. End connector; 7. Elastic component. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Example like Figure 1 , 4As shown, the noise reduction layer 5 is integrally formed with the upper part of the U-shaped damping rubber component 3. The noise reduction layer 5 includes an upper micro-perforated layer 501, a honeycomb core layer 502 and a lower micro-perforated layer 503. The upper micro-perforated layer 501 and the lower micro-perforated layer 503 are located on both sides of the honeycomb core layer 502.

[0018] It should be noted that in this embodiment, the noise reduction layer 5 is integrally formed with the upper part of the U-shaped damping rubber component 3, including an upper micro-perforated layer 501, a honeycomb core layer 502 and a lower micro-perforated layer 503. The micropores in the upper microperforated layer 501 and the lower microperforated layer 503 have a diameter of 0.5 mm and a spacing of 3 mm, with the two layers of micropores distributed alternately. The honeycomb core layer 502 has regular hexagonal honeycomb pores with a diameter of 5 mm and a wall thickness of 0.3 mm, which is three times the thickness of the upper microperforated layer 501 and the lower microperforated layer 503. Noise generated by bridge expansion and contraction and vehicle movement will propagate to the noise reduction layer 5. The noise first reaches the upper microperforated layer 501, where the micropores will initially reflect and absorb the noise. When the noise is transmitted to the honeycomb core layer 502, the regular hexagonal honeycomb structure of the honeycomb core layer 502 will cause the noise to be reflected and scattered multiple times, further consuming the energy of the noise. Finally, the noise reaches the lower microperforated layer 503, where it will reflect and absorb the remaining noise again, thus achieving a good noise reduction effect.

[0019] like Figure 1-3 As shown, the structure includes a receiving component 1, a slot 2, a U-shaped damping rubber component 3, a connecting profile 4, a noise reduction layer 5, an end connector 6, and an elastic component 7. The receiving component 1 is provided in two sets opposite each other. The slot 2 is opened inside the receiving component 1. The U-shaped damping rubber component 3 is provided between the two sets of receiving components 1 in cooperation with the slot 2. The connecting profile 4 is filled on both sides of the U-shaped damping rubber component 3. The end connector 6 has an L-shaped structure. One end of it is integrally formed with the end of the receiving component 1, and the other end extends into the interior of the bridge structure and is connected to the bridge embedded part. The elastic component 7 is provided at intervals between the two sets of receiving components 1 along the length direction of the receiving component 1.

[0020] It should be noted that in this embodiment, the receiving component 1 is made of high-strength steel, and there are two sets arranged opposite each other. A slotted groove 2 is provided on the inner side. The U-shaped damping rubber component 3 is made of damping rubber material, with slotted sides, and fits tightly with the slotted groove 2 on the inner side of the receiving component 1. It is located between the two sets of receiving components 1. The connecting profile 4 is made of rigid metal material, filling both sides of the U-shaped damping rubber component 3, and is fixedly connected to the inner wall of the U-shaped damping rubber component 3 on the outer side. The end connector 6 is L-shaped, with one end integrally formed with the end of the receiving component 1, and the other end extending into the bridge structure and connecting to the bridge's embedded parts. Elastic components 7 are spaced apart along the length of the receiving component 1 between the two sets of receiving components 1. When the bridge expands or contracts due to factors such as temperature changes, the two sets of receiving components 1 will undergo relative displacement under the action of the bridge's expansion and contraction force. Because the U-shaped damping rubber component 3 is tightly fitted with the slatted groove 2 on the inner side of the receiving component 1, it will undergo elastic deformation during the relative displacement of the receiving component 1. Utilizing its own damping characteristics, it consumes some of the vibration energy generated by the bridge expansion and contraction, thus playing a role in vibration reduction. The connecting profile 4, as a rigid component, plays a supporting and limiting role in the deformation of the U-shaped damping rubber component 3, ensuring that the deformation of the U-shaped damping rubber component 3 is within a reasonable range. During the relative displacement of the receiving component 1, the elastic component 7 will be compressed or stretched. When the bridge expansion and contraction force disappears, the elastic restoring force of the elastic component 7 will assist the receiving component 1 to return to its initial relative position, ensuring the normal working state of the expansion joint. The end connector 6, through its connection with the bridge embedded parts, securely connects the expansion joint to the bridge structure as a whole, ensuring the stability of the expansion joint during operation.

[0021] Working principle of this utility model: Refer to the instruction manual appendix Figure 1-4 When the bridge expands and contracts due to factors such as temperature changes, the two sets of supporting components 1 will have relative displacement under the action of the bridge expansion and contraction force. At this time, the U-shaped damping rubber component 3 will undergo elastic deformation during the relative displacement of the supporting component 1 because it is tightly fitted with the groove 2 on the inner side of the supporting component 1. It will consume some of the vibration energy generated by the expansion and contraction of the bridge by utilizing its own damping characteristics, thus playing a role in vibration reduction. The connecting profile 4, as a rigid component, plays a supporting and limiting role in the deformation of the U-shaped damping rubber component 3, ensuring that the deformation of the U-shaped damping rubber component 3 is within a reasonable range. Noise generated by bridge expansion joints and vehicle movement propagates to the noise reduction layer 5. The noise first reaches the upper micro-perforated layer 501, where the micropores initially reflect and absorb the noise. When the noise reaches the honeycomb core layer 502, the hexagonal honeycomb structure causes multiple reflections and scatterings, further dissipating the noise's energy. Finally, the noise reaches the lower micro-perforated layer 503, where it again reflects and absorbs the remaining noise, thus achieving a good noise reduction effect. During the relative displacement of the receiving component 1, the elastic component 7 will be compressed or stretched. When the bridge expansion force disappears, the elastic restoring force of the elastic component 7 will help the receiving component 1 return to its initial relative position, ensuring the normal working condition of the expansion joint. The end connector 6 connects to the bridge embedded parts to securely attach the expansion joint to the bridge structure, ensuring the stability of the expansion joint during operation.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise-reducing bridge expansion joint, characterized in that: The device includes a receiving component (1), a slot (2), a U-shaped damping rubber component (3), a connecting profile (4), a noise reduction layer (5), an end connector (6), and an elastic component (7). The receiving component (1) is provided in two sets opposite each other. The slot (2) is opened on the inner side of the receiving component (1). The U-shaped damping rubber component (3) is provided between the two sets of receiving components (1) in cooperation with the slot (2). The connecting profile (4) fills both sides of the U-shaped damping rubber component (3). The noise reduction layer (5) is integrally formed with the upper part of the U-shaped damping rubber component (3). The noise reduction layer (5) includes an upper micro-perforated layer (501), a honeycomb core layer (502), and a lower micro-perforated layer (503), with the upper micro-perforated layer (501) and the lower micro-perforated layer (503) located on both sides of the honeycomb core layer (502).

2. The noise-reducing bridge expansion joint according to claim 1, characterized in that: The U-shaped damping rubber component (3) has two sides that are slatted, and the slot (2) is a slatted groove. The two side walls of the U-shaped damping rubber component (3) are tightly fitted to the inner wall of the slot (2).

3. The noise-reducing bridge expansion joint according to claim 1, characterized in that: The connecting profile (4) is made of rigid material and its outer side is fixedly connected to the inner wall of the U-shaped damping rubber part (3).

4. The noise-reducing bridge expansion joint according to claim 1, characterized in that: The micropore diameter of the upper microperforated layer (501) and the lower microperforated layer (503) is 0.5-2 mm, the micropore spacing is 3-8 mm, and the micropores of the two layers are staggered.

5. A noise-reducing bridge expansion joint according to claim 1, characterized in that: The honeycomb core layer (502) has a regular hexagonal structure with a pore diameter of 5-15 mm and a wall thickness of 0.3-1 mm. The thickness of the honeycomb core layer (502) is 3-8 times the thickness of the upper micro-perforated layer (501) and the lower micro-perforated layer (503).

6. A noise-reducing bridge expansion joint according to claim 1, characterized in that: The end connector (6) has an L-shaped structure, with one end integrally formed with the end of the receiving part (1), and the other end extending into the bridge structure and connected to the bridge embedded part.

7. A noise-reducing bridge expansion joint according to claim 1, characterized in that: The elastic element (7) is spaced apart between the two sets of receiving elements (1) along the length direction of the receiving element (1).

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