Composite nonmetal sound barrier unit plate

Abstract

The utility model belongs to the technical field of sound barriers, and particularly relates to a composite nonmetal sound barrier unit plate. The non-metal sound barrier unit plate comprises a back plate formed by pouring concrete and a face plate made of ceramic particle sound absorption materials, the back plate and the face plate are connected through a damping deformation layer, and the face plate can float relative to the back plate in a damping mode after being impacted by a load. The sound absorption panel of the non-metal sound barrier unit plate can perform damping floating relative to the back plate, so that the non-metal sound barrier unit plate is more impact-resistant and fatigue-resistant, and has the characteristics of high structural strength, lasting vibration and noise reduction effects and long service life.

Description

Technical Field

[0001] This utility model belongs to the field of sound barrier technology, specifically relating to a composite non-metallic sound barrier unit panel. Background Technology

[0002] Currently, non-metallic sound barriers for high-speed railways in China are mainly made of various concrete materials. The sound barriers generally adopt an insert structure in which unit panels are inserted into H-shaped steel columns. The traditional concrete sound barrier unit panels are cast in stages. Structurally, they are divided into perforated panels, non-perforated back panels, and internal sound absorbers. The manufacturing process is to first cast the perforated panels, then lay sound-absorbing rock wool, and then cast the back concrete to wrap the entire sound-absorbing surface. After the concrete solidifies, it is demolded and then cured.

[0003] Most existing non-metallic sound barriers are made of concrete and rock wool composites. During use, cracks in the concrete structure can expand until they break, leading to corrosion of the reinforcing steel and surface cracking, which poses a safety risk. At the same time, under pulsating loads, the sound-absorbing panels suffer significant impact loss, and the rock wool can collapse due to adhesive failure, causing the sound barrier to lose its noise reduction function. Utility Model Content

[0004] The purpose of this invention is to provide a composite non-metallic sound barrier unit panel with a sound-absorbing panel that is damped and floats relative to the back panel, and is impact-resistant and fatigue-resistant. It features high structural strength, long-lasting vibration reduction and noise reduction effect, and long service life.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A composite non-metallic sound barrier unit panel is characterized in that it includes a back panel made of concrete and a front panel made of ceramic particle sound-absorbing material. The back panel and the front panel are connected by a damping deformation layer. The front panel can float relative to the back panel in a damped manner after receiving a load impact.

[0007] The additional technical features constituting the above-mentioned composite non-metallic sound barrier unit panel also include:

[0008] —The back plate has a box-shaped structure. The damping deformation layer and the panel are placed in the box of the back plate in sequence. The side of the panel is connected to the box wall of the back plate by a guide mechanism composed of a slide bar and a slide groove.

[0009] —The damping deformation layer includes aluminum foam boards placed on the front and rear sides of the substrate. The front aluminum foam board is connected to the panel by adhesive or bolts, and the rear aluminum foam board is connected to the back plate by adhesive or bolts. The substrate and the aluminum foam board are connected by adhesive.

[0010] —The concrete of the back plate is provided with a prestressed steel frame inside.

[0011] —A mesh fiber cloth is provided on the inside of the panel near the panel side;

[0012] —The panel is coated with a polyurea elastomer.

[0013] Compared with the prior art, the composite non-metallic sound barrier unit panel provided by this utility model has the following advantages: This new unit panel adds a damping deformation layer to the traditional panel and back panel. This layer is located between and connected to the panel and back panel. Thus, when the panel is subjected to airflow, noise, and wind pressure impacts, the elastic buffering of the rear damping deformation layer achieves a damping floating effect relative to the back panel, reducing the damage to the sound-absorbing surface from load impacts, further improving fatigue resistance, and extending service life. Simultaneously, the back panel is made of cast concrete, and the panel is made of ceramic particle sound-absorbing material, resulting in high structural strength, good noise reduction performance, damping buffering effect, and vibration reduction and noise reduction effect. It also features a compact structure, stability, durability, and good performance. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a composite non-metallic sound barrier unit panel according to the present invention. Detailed Implementation

[0015] The structure and working principle of the composite non-metallic sound barrier unit panel provided by this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, the structure of this composite non-metallic sound barrier unit panel includes a back panel 1 made of cast concrete and a panel 2 made of ceramic particle sound-absorbing material. The back panel 1 and the panel 2 are connected by a damping deformation layer 3. After receiving a load impact, the panel 2 can float relative to the back panel 1 with damping. The damping deformation layer 3 includes a matrix of polymer elastomer, aerogel pad, or rubber pad airbag, or the matrix is ​​made of organic gel material (mainly organic polymers, such as polyvinylpyrrolidone gel, polyacrylamide gel, polyacrylate gel, etc.) mixed with lightweight particles (ceramsite, perlite, etc.) and molded.

[0017] Its working principle is as follows: Based on the traditional back plate 1 and front plate 2, the non-metallic sound barrier unit panel is connected between the back plate 1 and front plate 2 by a damping deformation layer 3. In this way, the front plate 2 can float relative to the back plate 1 after receiving load impact, thereby reducing the wear of the unit panel by the load impact, better reducing vibration and noise, and extending the service life.

[0018] The back panel 1 is cast from concrete, the panel 2 is made of ceramic particle sound-absorbing material, and the damping deformation layer 3 includes a matrix of polymer elastomer, aerogel pad or rubber pad airbag, which has good elastic deformation and damping buffer performance, and can ensure that the panel 2 floats relative to the back panel 1 after being impacted by airflow and wind pressure, thus mitigating the damage it receives.

[0019] In the structure constituting the above-mentioned composite non-metallic sound barrier unit panel

[0020] —Preferredly, in order to improve the assembly stability of panel 2 and back plate 1, the back plate 1 is a box-shaped structure with the opening facing the noise. The damping deformation layer 3 and panel 2 are placed in the box of back plate 1 in sequence. The opening of the box allows for the installation of flanges or baffles to block and limit the edges of panel 2. Panel 2 is located on the outermost side to receive noise. The side of panel 2 is connected to the box wall of back plate 1 by a guide mechanism consisting of slide bar 41 and slide groove 42. That is, slide bar 41 and slide groove 42 are respectively set on the side of panel 2 and the box wall of back plate 1. Their guide direction is consistent with the depth direction of the box, which is consistent with the movement direction of panel 2 after being impacted. In this way, after panel 2 is impacted by load, floating displacement releases the impact energy. The guide mechanism ensures that panel 2 moves regularly and orderly, and the wind pressure load is also balanced.

[0021] —The polymer elastomer constituting the above-mentioned damping deformation layer 3 is microporous polyurethane, which forms a closed-cell structure through a foaming process. It has both elasticity and energy absorption properties, making it suitable for high-frequency pulse buffering and particularly suitable for use in rail transit sound barriers.

[0022] As an equivalent alternative, fiber-reinforced foam rubber can also be used to make the damping deformation layer 3, which is easy to process and mold, and its damping performance is between that of rubber and plastic. It is suitable for low-frequency vibration reduction of lightweight structures.

[0023] — Preferably, the polymer elastomer or aerogel pad constituting the above-mentioned damping deformation layer 3 is filled with a damping particle layer 31, which includes hollow glass microspheres, graphene or carbon black, that is, the effect of interlayer damping energy dissipation is enhanced by particle friction and interface slip.

[0024] —As a preferred embodiment, the above-mentioned damping deformation layer 3 includes foam aluminum plates (32, 32') placed on the front and rear sides of the substrate. The front foam aluminum plate 32 is connected to the panel 2 by adhesive or bolts, and the rear foam aluminum plate 32' is connected to the back plate 1 by adhesive or bolts. The substrate is connected to the foam aluminum plates (32, 32') by adhesive. The damping deformation layer 3 is sandwiched between the front and rear foam aluminum plates (32, 32') to ensure that its elastic deformation is uniform and regular. In addition, lightweight closed-cell foam aluminum is used, with a density between 0.3 and 0.6 g / cm³, which has high specific stiffness. The plastic deformation of the pore walls can absorb impact energy and is also suitable for high-frequency vibration isolation.

[0025] —The concrete used to pour the back plate 1 is ultra-high performance concrete, such as UHPC ultra-high performance concrete. It is a high-hardness material that resists direct external impact and has strong resistance to mechanical wear. After incorporating steel fibers (2-3% by volume) and nano-silica, its compressive strength can reach more than 150MPa, significantly improving its impact resistance. The material of the back plate 1 can also be polymer concrete, with epoxy resin or polyester resin replacing part of the cement to improve toughness and fatigue resistance. It is particularly suitable for high-frequency vibration environments. The back plate 1 is equipped with a prestressed steel frame 11. The prestress can offset part of the impact stress and play a supporting role to ensure the overall structure is stable and firm.

[0026] —The ceramic particle sound-absorbing material constituting the panel 2 above is a molded porous alumina ceramic. The porous structure design enables the alumina ceramic to effectively absorb sound waves, especially the absorption effect of medium and high frequency sound waves. It also has high hardness, wear resistance, long service life, stable chemical properties, corrosion resistance, and is suitable for harsh environments. It has low manufacturing cost, high production efficiency, and is suitable for mass production.

[0027] The panel 2 is internally provided with a mesh fiber cloth 21, such as carbon fiber, glass fiber, aramid fiber, etc., to improve tensile strength and fatigue resistance, making it suitable for scenarios that are subjected to alternating loads for a long time. In addition, the reinforcing fibers can improve the interfacial bonding strength with the matrix and prevent interlayer delamination.

[0028] — Preferably, the surface of the panel 2 is configured with a sharkskin shield structure, which can reduce wind load vibration and stress concentration by molding or casting; the surface of the panel 2 is provided with a polyurea elastomer coating 22 with a thickness of 2-3mm to form a flexible protective layer to buffer high-frequency impact.

[0029] The above-described embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the implementation of this utility model. Therefore, any other modifications or equivalent substitutions to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A composite non-metallic sound barrier unit panel, characterized in that: The device includes a back panel made of cast concrete and a panel made of ceramic particle sound-absorbing material. The back panel and the panel are connected by a damping deformation layer. The panel can float relative to the back panel with damping after receiving a load impact. The damping deformation layer includes aluminum foam boards placed on the front and rear sides of the substrate. The front aluminum foam board is connected to the panel by adhesive or bolts, and the rear aluminum foam board is connected to the back panel by adhesive or bolts. The substrate and the aluminum foam boards are connected by adhesive.

2. The composite non-metallic sound barrier unit panel according to claim 1, characterized in that: The back plate has a box-shaped structure. The damping deformation layer and the panel are placed inside the box of the back plate in sequence. The side of the panel is connected to the box wall of the back plate by a guide mechanism consisting of a slide bar and a slide groove.

3. The composite non-metallic sound barrier unit panel according to claim 1, characterized in that: The back plate has a prestressed steel frame inside the concrete.

4. A composite non-metallic sound barrier unit panel according to claim 1, characterized in that: The interior of the panel is covered with a mesh fiber cloth.

5. A composite non-metallic sound barrier unit panel according to claim 1, characterized in that: The panel is provided with a polyurea elastomer coating.

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