Municipal road sound-absorbing barrier structure and municipal road sound-absorbing isolation belt

Abstract

The utility model discloses a municipal road sound-absorbing barrier structure and municipal road sound-absorbing isolation strip, including first structural layer, second structural layer and silencing layer, the first structural layer is provided with sound-absorbing hole, the sound-absorbing hole extends along the horizontal direction, and the second structural layer is provided with sound-absorbing layer. The top ends of the first structural layer and the second structural layer extend in the direction away from the silencing layer to form a sound absorption space, and at least one scattering plate is arranged in the sound absorption space in the direction from the first structural layer to the second structural layer. The sound absorption holes can increase the energy loss of the noise in the upward transmission process so as to reduce the generation of diffraction noise. By arranging the sound absorption space, the equivalent height of the municipal road sound absorption barrier structure is increased, and noise shielding of the municipal road sound absorption barrier structure is increased. The scattering plate blocks diffraction noise in the sound absorption space to generate scattering diffusion, and the diffraction noise is easier to consume and absorb in the sound absorption space. The sound absorption holes are matched with the sound absorption space and the scattering plate, and the influence of diffraction noise is reduced in multiple stages of generation and transmission of the diffraction noise.

Description

Technical Field

[0001] The utility model belongs to the technical field of noise control, and specifically relates to a municipal road sound-absorbing barrier structure and a municipal road sound-absorbing isolation belt. Background Art

[0002] With the continuous acceleration of my country's urbanization process, a fast transportation network has been established between cities and within cities. These municipal roads inevitably pass through densely populated living areas, and the noise generated has brought certain interference to people's work, life and study.

[0003] Usually, when controlling noise, three aspects are considered: sound source control, propagation path control, and protection of the receiving point. Among them, propagation path control is the simplest and most economical control method. By setting up a sound barrier structure between the noise source and the receiving point, a good noise reduction effect can be achieved within a certain range.

[0004] In order to improve the noise reduction effect of the sound barrier structure on noise, the height of the sound barrier structure is generally increased to improve the shielding of the sound barrier structure on the noise source, improve the noise propagation path, and reduce the noise energy in the ground living area. However, simply by increasing the height of the sound barrier structure, the sound barrier structure will block the vision of driving users, and the driving environment will feel smaller and depressing. In addition, it will also lead to waste of sound barrier structure materials and excessive cost. In addition, the shielding area of ​​the sound barrier structure on the noise source increases, and more noise energy will be directly directed to the sound barrier structure and slide along the surface of the sound barrier structure. When the noise reaches the top of the sound barrier structure, diffraction noise will be generated, and a new sound source point will be formed at the top of the sound barrier structure to radiate noise in all directions. Simply increasing the height of the sound barrier structure does not have a significant noise reduction effect.

[0005] Chinese patent CN 105386415 A discloses an ecological sound barrier device and a greening isolation device for municipal roads, including multiple sound barrier units, wherein the sound barrier unit includes a sound barrier body that can absorb noise; the sound barrier body is stacked from bottom to top with multiple planting boxes for planting plants, and also includes a Y-shaped component arranged at the top of the sound barrier body; the bottom of the sound barrier body is also provided with a water storage tank for storing water that penetrates from the sound barrier body. This scheme increases the effective height of the sound barrier device to block the noise source by setting a Y-shaped component, that is, increases the equivalent height of the sound barrier device, thereby reducing the noise energy of the noise source directly reaching the living area. This scheme is to set a first active sound absorber group on the inclined part of the Y-shaped component, or set a second active sound absorber group and / or a multiple wedge structure on the sound barrier body to absorb the noise directly reaching the sound barrier device.

[0006] Although the Y-shaped components in the above scheme increase the equivalent height of the sound barrier structure and improve the shielding of the sound barrier structure against the noise source, and the active sound absorber group and wedge-shaped structure are used to improve the absorption effect of the noise directly reaching the sound barrier structure, the Y-shaped component does not have a significant effect on reducing the diffraction noise generated at the top of the sound barrier structure. Therefore, the diffraction noise generated at the top of the sound barrier structure will still propagate to the living area and cause noise pollution. Utility Model Content

[0007] The utility model provides a municipal road sound-absorbing barrier structure and a municipal road sound-absorbing isolation belt to solve the problems of a depressing driving environment and excessively high cost caused by simply increasing the height of the sound barrier structure, and the noise pollution problem caused by the lack of obvious noise reduction effect on the diffraction noise generated at the top of the sound barrier structure.

[0008] The technical solution adopted by the utility model is:

[0009] A municipal road sound-absorbing barrier structure comprises a first structural layer facing the municipal road, a second structural layer facing away from the municipal road, and a sound-absorbing layer between the first structural layer and the second structural layer, wherein the first structural layer is provided with penetrating sound-absorbing holes, and the sound-absorbing holes extend in a horizontal direction, and the top ends of the first structural layer and the second structural layer respectively extend in a direction away from the sound-absorbing layer to form a sound-absorbing space, and at least one scattering plate is provided in the sound-absorbing space from the first structural layer to the second structural layer.

[0010] The municipal road sound-absorbing barrier structure of the utility model also has the following additional technical features:

[0011] The height of the upper edge of the second structure layer is higher than the height of the upper edge of the first structure layer.

[0012] A plurality of scattering plates are arranged in the sound absorbing space, the upper edge heights of the plurality of scattering plates are higher than the upper edge height of the first structural layer, and the upper edge heights of the plurality of scattering plates gradually increase toward the second structural layer.

[0013] The multiple scattering plates divide the sound absorbing space into multiple sound absorbing grooves, and the sound absorbing space has a symmetry line to divide the sound absorbing space into a space close to the first structural layer and a space close to the second structural layer, and the bottom edge of the sound absorbing groove located on the symmetry line is higher than the bottom edge of the sound absorbing grooves on both sides.

[0014] The included angle between the extended planes of the adjacent scattering plates is A, A is greater than 0° and less than 90°, and there are gaps between the plate bodies of the adjacent scattering plates.

[0015] The sound absorbing holes are bent and extended in a horizontal direction to divide the first structural layer into a plurality of structural parts arranged in a vertical direction.

[0016] A partial area of ​​the structure part extends obliquely upward and outward to form a planting groove capable of accommodating soil particles for planting ornamental plants, and the opening of the planting groove is upward and toward the sound absorbing hole.

[0017] The structural part is provided with a plurality of planting grooves in the horizontal direction, and there are gaps between adjacent planting grooves. The structural part is provided with concave vibration-damping grooves between adjacent planting grooves.

[0018] The sound absorbing space has an opening facing upwards, and the sound absorbing space can contain water for watering the plants in the planting trough. The sound absorbing space is provided with a pouring pipe connected to the planting trough to drip irrigate the planting trough.

[0019] The utility model also provides a municipal road sound-absorbing isolation belt, including a column, wherein the column has a fixing groove, and also includes the municipal road sound-absorbing barrier structure, the municipal road sound-absorbing barrier structure is inserted into the fixing groove from top to bottom, so that the side walls of the fixing groove clamp and fix the municipal road sound-absorbing barrier structure from both sides, and a sound insulation pad is arranged between the side walls of the fixing groove and the municipal road sound-absorbing barrier structure.

[0020] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0021] 1. In the utility model, the noise generated in the municipal road is mostly transmitted to the first structural layer along a straight line, and is transmitted upward along the plane of the first structural layer to the top of the first structural layer to generate diffraction, causing the noise to be transmitted to the living area of ​​the citizens and generating noise pollution. The sound-absorbing hole runs through the first structural layer, which can increase the energy loss of the noise in the process of upward propagation and reduce the noise energy in the propagation. In addition, the sound-absorbing hole extends in the horizontal direction, guiding more noise energy to propagate in the horizontal direction, reducing the noise energy that bypasses the sound-absorbing hole and propagates upward along the first structural layer to reach the top of the first structural layer.

[0022] Secondly, the tops of the first structural layer and the second structural layer extend away from the sound absorbing layer, which is equivalent to increasing the equivalent height of the municipal road sound absorbing barrier structure and increasing the insertion loss of the municipal road sound absorbing barrier structure. Instead of directly increasing the height of the municipal road sound absorbing barrier structure, the cost of the municipal road sound absorbing barrier structure is avoided, and the sight blocking of the municipal road sound absorbing barrier structure to the drivers can also be reduced, avoiding the formation of a depressing driving environment. In addition, the diffraction noise generated at the top of the first structural layer is blocked by the second structural layer, reducing the interference caused by the diffraction noise propagating downward and directly reaching the living area. At least one scattering plate is arranged in the sound absorbing space from the first structural layer to the second structural layer. The diffraction noise generated at the top of the first structural layer is blocked by the scattering plate in the sound absorbing space, and will be scattered and diffused in multiple directions, so that it is easier to be consumed and absorbed in the sound absorbing space. The sound-absorbing holes reduce the noise energy transmitted to the top of the first structural layer to reduce the generation of diffraction noise. The sound-absorbing space and the scattering plate can consume the generated diffraction noise energy. The sound-absorbing holes cooperate with the sound-absorbing space and the scattering plate to reduce the diffraction noise from multiple links such as the generation and propagation of the diffraction noise, thereby more effectively reducing the energy of the noise transmitted to the living area.

[0023] 2. As a preferred embodiment of the present invention, multiple scattering plates are arranged in the sound-absorbing space, and the upper edge heights of the multiple scattering plates are higher than the upper edge heights of the first structural layer, and the upper edge heights of the multiple scattering plates gradually increase toward the second structural layer. The diffracted sound waves generated at the top of the first structural layer are reduced layer by layer by the multiple scattering plates in the process of propagating toward the second structural layer, and multiple reflection resonances are generated in the sound-absorbing space, thereby improving the sound absorption effect of the sound-absorbing space on noise and reducing the noise energy that propagates downward to the living area. The upper edge heights of the multiple scattering plates gradually increase toward the second structural layer, and the angle of the noise propagating upward in a straight line is increased through the guidance of the scattering plates, and part of the noise energy is emitted into the air, reducing the interference to the people on the ground. In addition, the multiple scattering plates gradually increase in height, and each scattering plate can block the scattering plate closer to the first structural layer, so as to maximize the scattering effect of the scattering plate on the noise in the sound-absorbing space, thereby improving the sound absorption effect of the sound-absorbing space.

[0024] 3. As a preferred embodiment of the present invention, the angle between the extension planes of the adjacent scattering plates is A, A is greater than 0° and less than 90°, and there are gaps between the plates of the adjacent scattering plates. In the sound-absorbing space, the adjacent scattering plates are relatively inclined to change the size of the groove of the sound-absorbing groove. After the size of the groove of the sound-absorbing groove is changed, the impedance coefficient of the space in the sound-absorbing groove changes, and the effective sound absorption frequency of the sound-absorbing groove is changed. The adjacent scattering plates are relatively inclined, and the size of the sound-absorbing groove changes gradually, which not only improves the resonance sound absorption coefficient of the sound-absorbing space, but also makes the effective sound absorption bands of the sound-absorbing grooves connect with each other, widens the effective sound absorption band of the sound-absorbing space, and improves the sound absorption effect of noise. In addition, there are gaps between the adjacent scattering plates, and there is no intersection between the adjacent scattering plates. In the process of the diffraction noise generated by the top of the first structural layer propagating through the sound-absorbing space to the second structural layer, it passes through the scattering plates and the sound-absorbing grooves one by one, which can further improve the sound absorption effect of the sound-absorbing space.

[0025] 4. As a preferred embodiment of the present utility model, a partial area of ​​the structural part extends obliquely upward and outward to form a planting trough that can accommodate soil particles for planting ornamental plants, and the opening of the planting trough is upward and toward the sound-absorbing hole. First, a partial area of ​​the structural part extends obliquely upward and outward, which can reduce the vibration generated by the structural part, not only can it reduce the propagation of noise along the structural part, but also can reduce the noise caused by resonance of the structural part. After the planting trough is filled with soil particles, it not only increases the load of the structural part and reduces the vibration generated by the structural part, but also the filled soil generally has a larger porosity, and the filled soil has a greater sound-absorbing effect, which can absorb and reduce noise. The opening of the planting trough is upward, which is convenient for planting plants in the planting trough and for watering the planting trough. The planting trough faces the sound-absorbing hole. After plants are planted in the planting trough, the plants can block the sound-absorbing hole after they grow, firstly forming a shielding effect on the first structural layer to beautify the environment along the road. In addition, for the noise transmitted in a straight line from the noise source to the sound-absorbing hole, the plants reduce the noise through reflection and self-vibration, thereby reducing the noise energy sliding along the first structural layer, and also reducing the noise energy transmitted into the municipal road sound-absorbing barrier structure.

[0026] 5. As a preferred embodiment of the present invention, the sound-absorbing space has an opening facing upward, and the sound-absorbing space can hold water for watering the plants in the planting troughs. The sound-absorbing space is provided with a pouring pipe connected to the planting troughs to drip-irrigate the planting troughs. Natural water sources such as rainwater can be stored in the sound-absorbing space for watering the plants in the planting troughs, thereby reducing the number of maintenance such as watering the planted plants. The sound-absorbing space is provided with a pouring pipe connected to the planting troughs, and the water in the sound-absorbing space flows to the planting troughs through the pouring pipe, so that all the planting troughs can be drip-irrigated, so that the plants in all the planting troughs can be maintained at the same time. In addition, when manually watering the plants in the planting troughs, it is only necessary to inject water into the sound-absorbing space, and there is no need to water the planting troughs one by one, which saves the workload of watering and improves the convenience of watering. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present invention and constitute a part 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:

[0028] Figure 1 It is a cross-sectional schematic diagram of the municipal road sound-absorbing barrier structure in one implementation manner of the utility model;

[0029] Figure 2 It is a cross-sectional schematic diagram of a part of the municipal road sound-absorbing barrier structure under one embodiment of the utility model, wherein the planting groove has contained soil particles and planted ornamental plants;

[0030] Figure 3 A side view of the municipal road sound absorbing barrier structure in one embodiment of the utility model;

[0031] Figure 4 A top view of the municipal road sound-absorbing barrier structure in one implementation manner of the utility model;

[0032] Figure 5 A top view of the column in one embodiment of the utility model;

[0033] Figure 6 It is a schematic cross-sectional view of the municipal road sound-absorbing isolation belt under one implementation mode of the utility model.

[0034] in:

[0035] 1 first structural layer; 11 sound absorbing hole; 12 structural part; 13 planting groove; 131 soil particles; 132 ornamental plants; 14 vibration reduction groove; 15 fixing part;

[0036] 2 second structural layer;

[0037] 3. Sound-absorbing layer;

[0038] 4 sound-absorbing space; 41 scattering plate; 42 sound-absorbing groove;

[0039] 5. upright column; 51. fixing groove; 52. sound insulation pad. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0042] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0045] like Figure 1 , Figure 3 and Figure 4 As shown, a municipal road sound-absorbing barrier structure comprises a first structural layer 1 facing the municipal road, a second structural layer 2 facing away from the municipal road, and a sound-absorbing layer 3 between the first structural layer 1 and the second structural layer 2, the first structural layer 1 is provided with penetrating sound-absorbing holes 11, the sound-absorbing holes 11 extend in a horizontal direction, the top ends of the first structural layer 1 and the second structural layer 2 respectively extend in a direction away from the sound-absorbing layer 3 to form a sound-absorbing space 4, and at least one scattering plate 41 is provided in the sound-absorbing space 4 from the first structural layer 1 to the second structural layer 2.

[0046] The friction between the tires of vehicles traveling on municipal roads and the road surface, the honking of vehicles, etc., will form noise sources. According to the different propagation paths from the noise source to the municipal road sound-absorbing barrier structure, the propagation can be divided into three areas. In the first area, the noise propagates in a straight line from the noise source upward, and the propagation path is higher than the municipal road sound-absorbing barrier structure. It can directly pass over the municipal road sound-absorbing barrier structure and propagate to the back side, which can also be called the sound brightness area. In the second area, the noise propagates in a straight line upward from the noise source to the top of the first structural layer 1 to generate diffraction noise, which can also be called the direct area. In the third area, the noise propagates obliquely from the noise source to the level of the first structural layer 1, part of the noise slides and propagates along the level of the first structural layer 1, propagates to the end face of the first structural layer 1 to form diffraction noise, part of the noise penetrates into the municipal road sound-absorbing barrier structure to form a transmission wave, and part of the noise is reflected by the first structural layer 1 to form a reflection wave. The third area can also be called the shielding area.

[0047] The first structural layer 1 and the second structural layer 2 form structural support for the sound-absorbing layer 3, reducing structural damage to the sound-absorbing layer 3. At the same time, the first structural layer 1 and the second structural layer 2 are generally structures with relatively smooth surfaces, which can improve the overall appearance of the municipal road sound-absorbing barrier structure and improve the appreciation of the municipal road. The sound-absorbing layer 3 is generally a porous structure, such as sound-absorbing cotton, sound-absorbing foam, sound-absorbing gypsum structure, etc. The sound-absorbing layer 3 can absorb the transmitted waves and reduce the noise propagation caused by transmission.

[0048] The tops of the first structural layer 1 and the second structural layer 2 extend away from the sound absorbing layer 3, respectively. The angle between the line connecting the sound source point and the top of the first structural layer 1 and the horizontal plane increases, which is equivalent to increasing the equivalent height of the municipal road sound absorbing barrier structure, increasing the angle of the upward propagation of noise in the sound bright area, and the noise energy in the sound bright area propagates toward the sky, reducing the impact on the living area on the ground. The distribution range of the shielding area is increased, and more noise energy is blocked by the municipal road sound absorbing barrier structure and absorbed and reflected, thereby increasing the insertion loss of the municipal road sound absorbing barrier structure.

[0049] When the distribution range of the shielding area increases, more noise energy will be generated and propagated along the plane of the first structural layer 1, propagating to the end surface of the first structural layer 1 to form diffraction noise, and then transmitted to the living area of ​​citizens to cause noise pollution. The sound-absorbing holes 11 penetrate the first structural layer 1, which can increase the energy loss of noise in the process of upward propagation and reduce the noise energy in propagation. In addition, the sound-absorbing holes 11 extend in the horizontal direction, guiding more noise energy to propagate in the horizontal direction, reducing the noise energy that bypasses the sound-absorbing holes 11 and propagates upward along the first structural layer 1 to reach the top of the first structural layer 1. The sound-absorbing holes 11 can reduce the energy source of diffraction noise and reduce the generation of diffraction noise from the root.

[0050] The tops of the first structural layer 1 and the second structural layer 2 extend in a direction away from the sound-absorbing layer 3, respectively. The second structural layer 2 shields the first structural layer 1. When the diffraction noise generated by the top of the first structural layer 1 propagates toward the living area on the ground, it is shielded by the second structural layer 2 and part of the energy is reflected to the sound-absorbing space 4, reducing the interference caused by the diffraction noise propagating downward and directly reaching the living area. At least one scattering plate 41 is arranged in the sound-absorbing space 4 from the first structural layer 1 to the second structural layer 2. First, when the diffraction noise generated by the top of the structural layer propagates toward the second structural layer 2, it is shielded by the scattering plate 41, reducing the energy propagating to the second structural layer 2. Moreover, the scattering plate 41 can separate the sound-absorbing space 4, improve the sound absorption coefficient of the sound-absorbing space 4, and the diffraction noise is scattered by the scattering plate 41 and propagates in the sound-absorbing space 4 from all directions, enhancing the sound absorption effect of the sound-absorbing space 4 on the diffraction noise.

[0051] The sound absorbing holes 11 reduce the noise energy transmitted to the top of the first structural layer 1 to reduce the generation of diffraction noise, and the sound absorbing space 4 and the scattering plate 41 can consume the generated diffraction noise energy. The sound absorbing holes 11 cooperate with the sound absorbing space 4 and the scattering plate 41 to reduce the diffraction noise from multiple links such as the generation and transmission of diffraction noise, and more effectively reduce the energy of noise transmitted to the living area.

[0052] As a preferred embodiment of the present invention, Figure 1 As shown, the height of the upper edge of the second structural layer 2 is higher than the height of the upper edge of the first structural layer 1. The angle between the line connecting the upper edge of the first structural layer 1 and the upper edge of the second structural layer 2 and the horizontal plane is A. The diffraction noise generated by the top of the first structural layer 1 can propagate straight upward at an angle greater than A without being disturbed by the second structural layer 2. This area is called the sound shadow area. The municipal road sound barrier structure has a weak ability to reduce noise in the sound shadow area. The diffraction noise generated by the top of the first structural layer 1 propagates downward at an angle less than A, and is weakened by the shielding of the second structural layer 2. This area is called the cutoff area.

[0053] The upper edge height of the second structural layer 2 is higher than the upper edge height of the first structural layer 1, and the angle A is increased, which reduces the radiation range of the sound shadow area and reduces the energy of the diffraction noise transmitted to the side away from the municipal road. In addition, the radiation angle of the sound shadow area is increased, so that the diffraction noise energy is radiated into the air at a larger angle, reducing the noise pollution caused to the living area. For the noise propagating in the cut-off area, it is blocked by the second structural layer 2, and the second structural layer 2 reflects the noise into the sound absorbing space 4 and is absorbed.

[0054] As a preferred embodiment of the present invention, Figure 1As shown, the sound-absorbing space 4 is provided with multiple scattering plates 41, and the upper edge heights of the multiple scattering plates 41 are higher than the upper edge heights of the first structural layer 1, and the upper edge heights of the multiple scattering plates 41 gradually increase toward the second structural layer 2. The diffracted sound waves generated at the top of the first structural layer 1, in the process of propagating toward the second structural layer 2, are cut layer by layer by the multiple scattering plates 41, and multiple reflection resonances are generated in the sound-absorbing space 4, thereby improving the sound absorption effect of the sound-absorbing space 4 on noise and reducing the noise energy propagated in the cut-off area. The upper edge heights of the multiple scattering plates 41 gradually increase toward the second structural layer 2, and the radiation angle of the sound shadow area is gradually increased through the guidance of the scattering plates 41, thereby reducing the noise impact on the ground living area. In addition, the multiple scattering plates 41 gradually increase in height, and each scattering plate 41 can block the propagation of noise, and can maximize the scattering effect of the scattering plates 41 on the noise in the sound-absorbing space 4, so as to improve the sound absorption effect of the sound-absorbing space 4.

[0055] Preferably, Figure 1 As shown, the multiple scattering plates 41 divide the sound absorbing space 4 into multiple sound absorbing grooves 42. The sound absorbing space 4 has a symmetry line to divide the sound absorbing space 4 into a space close to the first structural layer 1 and a space close to the second structural layer 2. The bottom edge of the sound absorbing groove 42 located at the symmetry line is higher than the bottom edge of the sound absorbing groove 42 on both sides. After being scattered by the scattering plates 41, the noise enters the sound absorbing groove 42 in all directions to generate resonance interference. The sound absorbing groove 42 generates additional acoustic impedance to the noise, thereby improving the sound absorption effect of the noise. The heights of the bottom edges of the multiple sound absorbing grooves 42 are not exactly the same. The bottom edges of the sound absorbing grooves 42 located at the symmetry line are high, and the bottom edges of the sound absorbing grooves 42 located at both sides are low, thereby changing the acoustic impedance coefficient of the sound absorbing groove 42, changing the sound absorption frequency of the sound absorbing groove 42, and improving the effective sound absorption frequency range of the noise.

[0056] Preferably, Figure 1 and Figure 4As shown, the angle between the extension planes of the adjacent scattering plates 41 is A, A is greater than 0° and less than 90°, and there are gaps between the plates of the adjacent scattering plates 41. In the sound-absorbing space 4, the adjacent scattering plates 41 are relatively inclined to change the size of the groove body of the sound-absorbing groove 42. After the size of the groove body of the sound-absorbing groove 42 is changed, the impedance coefficient of the space in the sound-absorbing groove 42 changes, and the effective sound absorption frequency of the sound-absorbing groove 42 is changed. The adjacent scattering plates 41 are relatively inclined, and the size of the sound-absorbing groove 42 changes gradually, which not only improves the resonance sound absorption coefficient of the sound-absorbing space 4, but also makes the effective sound absorption bands of the sound-absorbing grooves 42 connect with each other, widens the effective sound absorption band of the sound-absorbing space 4, and improves the sound absorption effect on noise. In addition, there are gaps between adjacent scattering plates 41, and there is no intersection between adjacent scattering plates 41. In the process of diffraction noise generated by the top of the first structural layer 1 propagating through the sound absorbing space 4 toward the second structural layer 2, it passes through the scattering plates 41 and the sound absorbing grooves 42 one by one, which can further improve the sound absorption effect of the sound absorbing space 4. The utility model does not limit the relative inclination direction of adjacent scattering plates 41. Adjacent scattering plates 41 can be relatively inclined in the vertical direction, close to or away from each other, or relatively inclined in the horizontal direction, close to or away from each other, or relatively inclined in both the vertical direction and the horizontal direction.

[0057] As a preferred embodiment of the present invention, Figure 3 As shown, the sound-absorbing holes 11 are bent and extended in the horizontal direction to divide the first structural layer 1 into a plurality of structural parts 12 arranged in the vertical direction. The sound-absorbing holes 11 extend continuously in the horizontal direction to divide the first structural layer 1, which can reduce the noise energy that slides up and down along the first structural layer 1, and reduce the energy of the noise that continues to slide upward and propagate bypassing the sound-absorbing holes 11, thereby reducing the energy of the diffraction noise generated. The sound-absorbing holes 11 are bent and extended in the horizontal direction, which increases the noise propagation path that propagates in the horizontal direction, so that the noise is gradually attenuated and absorbed, reducing the noise energy incident on the municipal road sound-absorbing barrier structure, and reducing the generation of transmitted noise.

[0058] As an example of this implementation, Figure 1 and Figure 2As shown, a part of the area of ​​the structural part 12 extends upward and outward at an angle to form a planting trough 13 that can accommodate soil particles 131 for planting ornamental plants 132, and the opening of the planting trough 13 is upward and toward the sound-absorbing hole 11. First, a part of the area of ​​the structural part 12 extends upward and outward at an angle to form a deformation structure such as a structural protrusion, which can reduce the vibration that is easy to occur in a planar structure, and can not only reduce the propagation of noise along the structural part 12, but also reduce the noise caused by the resonance of the structural part 12. After the planting trough 13 is filled with soil particles 131, not only the load of the structural part 12 is increased and the vibration generated by the structural part 12 is reduced, but also the porosity of the filled soil is generally large, and the filled soil has a greater sound-absorbing effect, which can absorb and reduce noise. The opening of the planting trough 13 is upward, which is convenient for planting plants in the planting trough 13 and for watering the planting trough 13. The planting groove 13 faces the sound-absorbing hole 11. After plants are planted in the planting groove 13, the plants can block the sound-absorbing hole 11 after they grow, firstly forming a shielding effect on the first structural layer 1 to beautify the environment along the road. In addition, for the noise transmitted in a straight line from the noise source to the sound-absorbing hole 11, the plants reduce the noise through reflection and self-vibration, thereby reducing the noise energy sliding along the first structural layer 1, and also reducing the noise energy transmitted into the municipal road sound-absorbing barrier structure.

[0059] In this embodiment, the planting trough 13 is integrally formed with the first structural layer 1. When processing the first structural layer 1, the planting trough 13 is compression molded, which can reduce the complexity of the construction of the municipal road sound barrier structure. Of course, the planting trough 13 can also be processed separately. The planting trough 13 is provided with a hanging hook, which extends into the sound absorbing hole 11 through the hanging hook so that the planting trough 13 is hung on the sound absorbing hole 11. During the construction of the municipal road sound barrier structure, soil particles 131 can be filled in the planting trough 13, and after the ornamental plants 132 are planted, the planting trough 13 can be installed in the sound absorbing hole 11. At the same time, when some plants have problems such as drying up, it is also convenient to replace the ornamental plants 132.

[0060] Preferably, Figure 1As shown, the structural portion 12 is provided with a plurality of planting grooves 13 in the horizontal direction, and there are gaps between adjacent planting grooves 13. The structural portion 12 is provided with recessed vibration-damping grooves 14 between adjacent planting grooves 13. The design of the vibration-damping grooves 14 can firstly indicate the processing position of the planting grooves 13, so that the arrangement of the planting grooves 13 is more uniform. Secondly, the vibration-damping grooves 14 block the sound waves propagating along the structural portion 12, so that more energy is transmitted to the range of the planting grooves 13, thereby improving the absorption of the sound wave energy by the planting grooves 13. There are gaps between adjacent planting grooves 13, which can prevent noise from propagating along the side walls of the planting grooves 13.

[0061] Preferably, the sound absorbing space 4 has an opening facing upward, and the sound absorbing space 4 can hold water for watering the plants in the planting trough 13. The sound absorbing space 4 is provided with a pouring pipe connected to the planting trough 13 to drip-irrigate the planting trough 13. Natural water sources such as rainwater can be stored in the sound absorbing space 4 for watering the plants in the planting trough 13, thereby reducing the number of maintenance such as watering the planted plants. The sound absorbing space 4 is provided with a pouring pipe connected to the planting trough 13, and the water in the sound absorbing space 4 flows to the planting trough 13 through the pouring pipe, so that all the planting troughs 13 can be drip-irrigated, so that the plants in all the planting troughs 13 can be maintained at the same time. In addition, when the plants in the planting troughs 13 are manually watered, it is only necessary to inject water into the sound absorbing space 4, and there is no need to water the planting troughs 13 one by one, which saves the workload of watering and improves the convenience of watering. Preferably, one end of the pouring pipe is connected to the sound absorbing space 4 so that the water in the sound absorbing space 4 flows into the pouring pipe. The pouring pipe is located in the sound absorbing layer 3, which is convenient for hiding the pipeline line. The pouring pipe is connected to the planting trough 13 through the sound absorbing hole 11, which is convenient for watering the planting trough 13. In addition, a flow rate control switch is provided on the pouring pipe to control the watering rate of the planting trough 13 to prevent overwatering.

[0062] like Figure 5 and Figure 6As shown, a municipal road sound-absorbing isolation belt comprises a column 5, wherein the column 5 has a fixing groove 51, and further comprises the municipal road sound-absorbing barrier structure, wherein the municipal road sound-absorbing barrier structure is inserted into the fixing groove 51 from top to bottom, so that the side walls of the fixing groove 51 clamp and fix the municipal road sound-absorbing barrier structure from both sides, and a sound insulation pad 52 is arranged between the side walls of the fixing groove 51 and the municipal road sound-absorbing barrier structure. The municipal road sound-absorbing isolation belt can be regarded as a model with infinite length in the horizontal direction, and is assembled by fixing the municipal road sound-absorbing barrier structure by the column 5, thereby reducing the extension length of the municipal road sound-absorbing barrier structure and facilitating the processing and transportation of the municipal road sound-absorbing barrier structure. The municipal road sound-absorbing barrier structure is inserted into the fixing groove 51 from top to bottom, and the construction method is relatively simple, and the fixing structure is relatively stable, and the column 5 plays a role in strengthening the structure of the municipal road sound-absorbing isolation belt, thereby reducing the tipping damage of the municipal road sound-absorbing isolation belt caused by the action of wind blowing and other forces.

[0063] A sound insulation pad 52 is provided between the side wall of the fixing groove 51 and the municipal road sound absorbing barrier structure, which can reduce the propagation of sound waves between the municipal road sound absorbing barrier structure and the column 5. Preferably, the municipal road sound absorbing barrier structure is provided with a fixing portion 15 for clamping and fixing, and the side wall of the fixing groove 51 abuts against the surface of the fixing portion 15, clamping and fixing the fixing portion 15 from both sides. The sound absorbing hole 11 extends in the horizontal direction, and at least a part of the sound absorbing hole 11 extends in the fixing portion 15.

[0064] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0065] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0066] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A municipal road sound-absorbing barrier structure, comprising a first structural layer facing the municipal road, a second structural layer facing away from the municipal road, and a sound-absorbing layer between the first structural layer and the second structural layer, characterized in that: The first structural layer is provided with penetrating sound-absorbing holes, which extend in a horizontal direction. The top ends of the first structural layer and the second structural layer respectively extend in a direction away from the sound-absorbing layer to form a sound-absorbing space. At least one scattering plate is provided in the sound-absorbing space from the first structural layer to the second structural layer.

2. The municipal road sound-absorbing barrier structure according to claim 1 is characterized in that: The height of the upper edge of the second structure layer is higher than the height of the upper edge of the first structure layer.

3. The municipal road sound absorbing barrier structure according to claim 1 is characterized in that: A plurality of scattering plates are arranged in the sound absorbing space, the upper edge heights of the plurality of scattering plates are higher than the upper edge height of the first structural layer, and the upper edge heights of the plurality of scattering plates gradually increase toward the second structural layer.

4. The municipal road sound-absorbing barrier structure according to claim 3 is characterized in that: The multiple scattering plates divide the sound absorbing space into multiple sound absorbing grooves, and the sound absorbing space has a symmetry line to divide the sound absorbing space into a space close to the first structural layer and a space close to the second structural layer, and the bottom edge of the sound absorbing groove located on the symmetry line is higher than the bottom edge of the sound absorbing grooves on both sides.

5. The municipal road sound-absorbing barrier structure according to claim 3 is characterized in that: The included angle between the extended planes of the adjacent scattering plates is A, A is greater than 0° and less than 90°, and there are gaps between the plate bodies of the adjacent scattering plates.

6. The municipal road sound-absorbing barrier structure according to claim 1, characterized in that: The sound absorbing holes are bent and extended in a horizontal direction to divide the first structural layer into a plurality of structural parts arranged in a vertical direction.

7. The municipal road sound-absorbing barrier structure according to claim 6 is characterized in that: A partial area of ​​the structure part extends obliquely upward and outward to form a planting groove capable of accommodating soil particles for planting ornamental plants, and the opening of the planting groove is upward and toward the sound absorbing hole.

8. The municipal road sound-absorbing barrier structure according to claim 7 is characterized in that: The structural part is provided with a plurality of planting grooves in the horizontal direction, and there are gaps between adjacent planting grooves. The structural part is provided with concave vibration-damping grooves between adjacent planting grooves.

9. The municipal road sound-absorbing barrier structure according to claim 7, characterized in that: The sound absorbing space has an opening facing upwards, and the sound absorbing space can contain water for watering the plants in the planting trough. The sound absorbing space is provided with a pouring pipe connected to the planting trough to drip irrigate the planting trough.

10. A municipal road sound-absorbing isolation belt, characterized in that: The municipal road sound-absorbing isolation zone includes a column, each of which has a fixing groove, and also includes the municipal road sound-absorbing barrier structure of any one of claims 1 to 9, wherein the municipal road sound-absorbing barrier structure is inserted into the fixing groove from top to bottom so that the side walls of the fixing groove clamp and fix the municipal road sound-absorbing barrier structure from both sides, and a sound insulation pad is arranged between the side walls of the fixing groove and the municipal road sound-absorbing barrier structure.

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