CN111501589A - Honeycomb highway sound insulation safety device against wind - Google Patents
Honeycomb highway sound insulation safety device against wind Download PDFInfo
- Publication number
- CN111501589A CN111501589A CN202010315754.1A CN202010315754A CN111501589A CN 111501589 A CN111501589 A CN 111501589A CN 202010315754 A CN202010315754 A CN 202010315754A CN 111501589 A CN111501589 A CN 111501589A
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- wall
- wall surface
- folding
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
- E01F7/02—Snow fences or similar devices, e.g. devices affording protection against sand drifts or side-wind effects
- E01F7/025—Devices specially adapted for protecting against wind, e.g. screens, deflectors or attenuators at tunnel or lock entrances
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0035—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with undulated surfaces
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0064—Perforated plate or mesh, e.g. as wall facing
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Environmental Sciences (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a honeycomb highway sound-insulation windproof device which comprises an arc-shaped wall surface and a folding wall surface, wherein the arc-shaped wall surface and the folding wall surface are respectively built on the ground, the arc-shaped wall surface and the upper part of the folding wall surface are connected into a whole, a cavity is formed between the arc-shaped wall surface and the folding wall surface, and a honeycomb silencing structure is arranged on the folding wall surface. The device absorbs or blocks the noise through various forms such as honeycomb amortization structure, folding wall, amortization cavity and arc wall, has improved the separation effect of noise greatly.
Description
Technical Field
The invention belongs to the technical field of highway sound-insulation wind-proof devices, and particularly relates to a honeycomb highway sound-insulation wind-proof device.
Background
The sound insulation barrier facility can effectively improve the function of the highway, improve the quality of the highway and improve the environmental behavior and the quality of the surrounding environment of the highway. The main function of a road sound barrier is to block sound transmission, reflect and absorb most of the sound energy, and allow only part of the sound energy to diffract, thereby forming a sound shadow behind the barrier and reducing noise. The noise reduction in the sound shadow region depends on the height of the barrier, the material and structure, the distance between the noise source and the sound receiving point and the height of the noise source and the sound receiving point.
The sound-proof barrier is of a transparent type, a metal transparent composite top sound-absorbing sound-proof barrier and the like. The height of all screen bodies of the transparent sound barrier is 8.0 m, and acrylic (acrylic) plate materials are adopted; the screen body height of the metal transparent composite top sound absorption sound barrier is 0.4 meter for top sound absorption, the middle part is 5.8 meters for transparency, the bottom is 1.3 meters for sound absorption, and aluminum alloy structures are adopted. However, these glass barriers have problems, such as general sound insulation, low durability, high cost, and fragility, and the existing barriers need to be supported by other buildings; foreign countries have sound insulation barriers with traditional brick structures, but the barriers are only one wall, so that the prevention and treatment effects on noise are limited, and the landscape effect is common.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a honeycomb-shaped highway sound insulation and windproof device which can effectively solve the problems of common sound insulation effect, high cost and fragility of the existing sound insulation screen.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a cellular highway sound insulation safety device against wind, is including establishing respectively in subaerial arc wall and folding wall, and arc wall and folding wall upper portion are connected as an organic wholely, form the cavity between arc wall and the folding wall, are provided with cellular amortization structure on the folding wall.
The beneficial effects produced by adopting the scheme are as follows: arc wall and folding wall are piled up by the fragment of brick and are formed, the low price of fragment of brick, and the raw materials is easily obtained, has the advantage of with low costs no secondary pollution, and piles up the structure that forms more firmly stable, and is not fragile.
The foldable wall surface is arranged on one side close to a highway, the arc-shaped wall surface is arranged on one side far away from the highway, and the arc-shaped wall surface is arranged on the other side, so that external wind can be prevented from blowing to the highway, the resistance of the wind to vehicles is further reduced, the resistance between the wall surface and the wind can be reduced due to the arc-shaped structure, the wind direction is changed, and the device is prevented from being damaged by strong wind; secondly, a certain amount of noise can be absorbed, and the sound generated on the road is absorbed, so that the sound pollution to the outside is reduced; and thirdly, the upper part of the arc-shaped wall surface and the folding wall surface are connected into a whole, so that the stability of the folding wall surface can be increased, and the overall stability of the structure can be further improved.
The foldable road surface is provided with a foldable wall surface, and firstly, noise generated on a road is reflected back to the road surface through the refraction, reflection and other actions between two adjacent foldable surfaces, so that the noise is prevented from being spread out, and the purpose of blocking the noise is achieved; secondly, a certain amount of noise is absorbed through the absorption effect of the noise absorber; thirdly, the surface area is increased, so that the contact area with noise is increased, and the absorption effect is enhanced; and fourthly, the arc-shaped wall surface is connected, so that the stability of the arc-shaped wall surface is improved, and the overall stability of the structure is further improved.
Be formed with the amortization cavity between arc wall and the folding wall, partial noise pierces through in the folding wall body gets into the amortization cavity, further absorbed by the amortization cavity, this structure is at first tentatively with a large amount of noise separation through the reflex action and the absorbing action of folding wall, again the absorbing action of amortization cavity, further block the noise, the absorbing action through arc wall at last, with remaining sound separation, through the device, can block or absorb the most noise that produces on the highway, improve the influence of highway noise to resident's life greatly.
Further, the silencing structure comprises a protruding part and a groove part, and the protruding part and the groove part are both arranged in a hexagonal shape.
Further, the boss is made of hexagonal bricks, which are arranged to be inclined.
The beneficial effects produced by adopting the scheme are as follows: the bellying inlays in the surface of folding wall through cement etc. and after the bellying was inlayed, just formed the recess between the bellying for folding wall surface forms unevenness's cellular structure, through this design, can increase the aesthetic property of folding wall, can increase the surface area of folding wall again, increases the area of contact with the noise, is favorable to the absorption of noise, improves the absorption effect of noise greatly.
Set up hexagonal brick into the slope, the inclined plane sets up downwards, can prevent the inside particulate matters such as deposit dust of honeycomb structure that forms, reduces the clean degree of difficulty.
Furthermore, the included angle between two adjacent folding surfaces on the folding wall surface is 60-120 degrees.
Furthermore, the included angle between two adjacent folding surfaces on the folding wall surface is 60 degrees.
The beneficial effects produced by adopting the scheme are as follows: the included angle between the adjacent folding surfaces is set to be 60-120 degrees, so that the reflection refraction effect of noise can be improved, the amount of noise reflected back to the road surface is increased, and the sound insulation effect is further improved.
Furthermore, a first flower stand is arranged on the inner side of the folding wall surface, a water inlet is formed in the side wall of the first flower stand, a second flower stand is arranged on the outer side of the arc-shaped wall surface, a water outlet is formed in the second flower stand, the first flower stand and the second flower stand are communicated through a pipeline, and the horizontal height of the pipeline is lower than that of a road surface.
The beneficial effects produced by adopting the scheme are as follows: soil is filled in the flower stand I and the flower stand II, green plants are planted in the flower stand I and the flower stand II, the attractiveness of the device is further improved through the green plants, if climbing plants are planted in the flower stand I and the flower stand II, the plant vines can climb along the arc-shaped wall surface of the folding wall surface box, even the whole device can be covered, the attractiveness of the device is greatly improved, a special landscape line is formed, the green plants also have a certain sound absorption effect, a certain space is formed between the vines and the wall surface, and the sound absorption effect can be further improved; meanwhile, the green plants can also play a role in purifying air, can absorb tail gas discharged by an automobile, and reduce pollution of the tail gas to the environment.
A water inlet is formed in one side wall of the flower bed, and excessive rainwater on a road can be discharged into the flower bed along the water inlet in heavy rain, so that inconvenience in running vehicles due to accumulated water on the road surface is avoided; rainwater entering the flower bed I can play a role in irrigating green plants, and meanwhile, soil and the green plants can also play a role in purifying the rainwater; the level in outlet is less than the level of water inlet, and in the flower stand I too much rainwater can pass through the pipeline and arrange into flower stand two, waters the back to the green planting in the flower stand two, and too much rainwater can be arranged into city rainwater processing system through the outlet, realizes the recycle of rainwater.
Furthermore, a first filtering wall body is arranged in the first flower bed, a first sedimentation cavity is formed between the first filtering wall body and the first flower bed, and the first sedimentation cavity is communicated with the second flower bed through a pipeline.
Furthermore, a second filtering wall body is arranged in the second flower bed, a second sedimentation cavity is formed between the second filtering wall body and the second flower bed, and the second sedimentation cavity is communicated with the outside through a water outlet.
The beneficial effects produced by adopting the scheme are as follows: the filtering wall body I is connected with the side wall and the bottom surface of the flower stand I into a whole, the filtering wall body II is connected with the side wall and the bottom surface of the flower stand II into a whole, excessive rainwater in the flower stand I enters a formed precipitation cavity I after being filtered by the filtering wall body I, and is discharged into the flower stand II through a pipeline after being precipitated in the precipitation cavity I, so that the quality of the rainwater entering the flower stand II is improved; excessive rainwater in the flower bed II enters the precipitation cavity II through the filtering action of the filtering wall body II, and finally the filtered and purified water is discharged into the urban rainwater treatment system.
Furthermore, a grating plate is arranged at the water inlet.
The beneficial effects produced by adopting the scheme are as follows: the grating plate is used for intercepting larger pollutants, so that the water inlet is prevented from being blocked by the pollutants in rainy seasons; simultaneously, avoid the soil in the flower stand one to leak outward, regularly clear up the pollutant on the grid tray, improve the device's result of use.
Further, the height of the arc-shaped wall surface and the height of the folding wall surface are both 5 meters.
The beneficial effects produced by adopting the scheme are as follows: set up arc wall and folding wall to 5 meters height, this height is enough to block the noise that produces on the highway, and the noise reduction is to peripheral resident's influence.
The beneficial effects produced by the invention are as follows:
1. the device is formed by piling bricks, and has the advantages of easily available raw materials, low cost, firm structure and good sound insulation effect.
2. The device comprises a folding wall surface and an arc-shaped wall surface, wherein a silencing cavity is formed between the folding wall surface and the arc-shaped wall surface, hexagonal bricks are inlaid on the surface of the folding wall surface, and an uneven structure is formed between the hexagonal bricks; secondly, the uneven structure formed by the hexagonal bricks is utilized to increase the surface area of the folded wall surface, so that the purpose of absorbing noise is achieved; thirdly, a groove structure is formed among the hexagonal bricks, the groove structure is used for absorbing a part of noise, and fourthly, the refraction effect of reflection on the surface of the folding wall surface is used for reflecting the noise to the road surface, so that the purpose of blocking the noise is realized; the noise reduction device comprises a folding wall surface, an arc wall surface, vine plants and a noise reduction cavity, wherein the folding wall surface is arranged on the front end of the folding wall surface, the arc wall surface is arranged on the front end of the folding wall surface, the vine plants are arranged on the folding wall surface and the arc wall surface, the vine plants are arranged on the folding wall surface.
3. The device bottom is provided with flower platform one and flower platform two, through the pipeline intercommunication between flower platform one and the flower platform two, plant green plant in flower platform one and the flower platform two, this structure has following several to have a little, it is first, the green plant of planting can be used to beautify the environment, the second, utilize green plant air-purifying, the third, utilize the climing class plant of green rattan to like the characteristic of climbing, absorb certain noise, the fourth, this structure can play the collection rainwater, purify the effect of rainwater, reduce the influence that the rainwater caused to the vehicle on the highway.
Drawings
FIG. 1 is a side cross-sectional structural schematic view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic cross-sectional view of a first filtering wall;
FIG. 4 is a schematic illustration of sound waves propagating to the upwardly facing surface of the folded wall surface;
FIG. 5 is a schematic view of the propagation structure of sound waves after the sound waves have propagated to the downward surface of the folded wall surface;
reference numerals: 1. an arc-shaped wall surface; 2. folding the wall surface; 3. a sound attenuation cavity; 4. a boss portion; 5. a groove part; 6. a first flower bed; 7. a water inlet; 8. a second flower bed; 9. a water outlet; 10. a pipeline; 11. filtering the wall I; 12. a first sedimentation cavity; 13. filtering a second wall body; 14. a second sedimentation cavity; 15. a grid plate; 16. a first screen plate; 17. a second screen plate; 18. a fine sand layer.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In one embodiment of the present invention, as shown in fig. 1 to 5, a cellular road sound-insulation windproof device is provided, which comprises an arc wall surface 1 and a folding wall surface 2 respectively built on the ground, wherein the arc wall surface 1 and the folding wall surface 2 are integrally connected, and optimally, the included angle between two adjacent folding surfaces on the folding wall surface 2 is 60 to 120 degrees. Optimally, the heights of the arc-shaped wall surface 1 and the folding wall surface 2 are both 5 meters.
The outer side of the arc-shaped wall surface 1 is provided with a second flower stand 8, a water outlet 9 is formed in the second flower stand 8, the first flower stand 6 and the second flower stand 8 are communicated through a pipeline 10, and the horizontal height of the pipeline 10 is lower than that of a road surface. Optimally, a first filtering wall body 11 is arranged in the first flower stand 6, a first sedimentation cavity 12 is formed between the first filtering wall body 11 and the first flower stand 6, and the first sedimentation cavity 12 is communicated with the second flower stand 8 through a pipeline 10. Optimally, a second filtering wall 13 is arranged in the second flower stand 8, a second sedimentation cavity 14 is formed between the second filtering wall 13 and the second flower stand 8, and the second sedimentation cavity 14 is communicated with the outside through a water outlet 9. Optimally, the first filtering wall body 11 and the second filtering wall body 13 both comprise a first screen plate 16 and a second screen plate 17, and a fine sand layer 18 is arranged between the first screen plate 16 and the second screen plate 17.
The folding wall surface 1 is provided with a honeycomb-shaped silencing structure. Optimally, the sound attenuation structure comprises a protruding part 4 and a groove part 5, and both the protruding part 4 and the groove part 5 are arranged in a hexagon shape. Preferably, the bosses 4 are made of hexagonal bricks, which are arranged inclined.
The working principle of the device is as follows: noise generated in the driving process of a vehicle is transmitted in a sound wave mode, the sound wave is in contact with the hexagonal bricks embedded in the folding wall surface 2 and the folding wall surface 2, in the contact process, a part of sound wave is returned to the road ground through the reflection and refraction effects of the folding wall surface 2 and the hexagonal bricks, a part of sound wave is absorbed by the groove parts 5 formed by the hexagonal bricks, a part of sound wave is absorbed by the folding wall surface 2, and the rest part of sound wave penetrates through the folding wall surface 2 and enters the silencing cavity 3;
the part of sound wave that gets into in the amortization cavity 3 is weakened when the amortization cavity 3 is walked in, and the faint sound wave after wearing out amortization cavity 3 continues to be absorbed by arc wall 1, and then realizes stopping the purpose of noise, improves the effect that blocks of noise, improves resident's living environment on every side.
While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited to the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (10)
1. The utility model provides a honeycomb highway windproof device that gives sound insulation, its characterized in that, including establishing respectively in subaerial arc wall (1) and folding wall (2), arc wall (1) and folding wall (2) upper portion are connected as an organic wholely, form amortization cavity (3) between arc wall (1) and folding wall (2), be provided with cellular amortization structure on folding wall (1).
2. A cellular highway acoustic and windproof device according to claim 1, wherein the sound attenuating structure comprises a raised portion (4) and a recessed portion (5), the raised portion (4) and the recessed portion (5) each being arranged in a hexagonal shape.
3. A cellular highway acoustic and windproof device according to claim 2, characterized in that said projections (4) are made of hexagonal tiles, which are arranged inclined.
4. A cellular highway acoustic and windproof device according to claim 1, wherein the angle between two adjacent folding surfaces on the folding wall surface (2) is 60-120 degrees.
5. A cellular road sound and wind insulation device as claimed in claim 1, wherein a first flower bed (6) is arranged on the inner side of the folding wall surface (2), a water inlet (7) is arranged on the side wall of the first flower bed (6), a second flower bed (8) is arranged on the outer side of the arc-shaped wall surface (1), a water outlet (9) is arranged on the second flower bed (8), the first flower bed (6) and the second flower bed (8) are communicated with each other through a pipeline (10), and the horizontal height of the pipeline (10) is lower than that of the road surface.
6. A cellular road sound and wind insulation device according to claim 5, wherein a first filtering wall (11) is arranged in the first flower bed (6), a first settling chamber (12) is formed between the first filtering wall (11) and the first flower bed (6), and the first settling chamber (12) is communicated with the second flower bed (8) through the pipeline (10).
7. A honeycomb-shaped highway sound and wind insulation device according to claim 6, wherein a second filtering wall body (13) is arranged in the second flower stand (8), a second settling cavity (14) is formed between the second filtering wall body (13) and the second flower stand (8), and the second settling cavity (14) is communicated with the outside through the water outlet (9).
8. A cellular road sound and wind proofing device according to claim 7, wherein the first filtering wall (11) and the second filtering wall (13) both comprise a first mesh plate (16) and a second mesh plate (17), and a fine sand layer (18) is arranged between the first mesh plate (16) and the second mesh plate (17).
9. A cellular highway acoustic and windproof device according to claim 5, characterized in that a grid plate (15) is arranged at the water inlet (7).
10. A cellular highway acoustic and windproof device according to claim 1, characterized in that the height of said curved wall surface (1) and of said folded wall surface (2) are both 5 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010315754.1A CN111501589B (en) | 2020-04-21 | 2020-04-21 | Honeycomb highway sound insulation safety device against wind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010315754.1A CN111501589B (en) | 2020-04-21 | 2020-04-21 | Honeycomb highway sound insulation safety device against wind |
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| Publication Number | Publication Date |
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| CN111501589A true CN111501589A (en) | 2020-08-07 |
| CN111501589B CN111501589B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010315754.1A Active CN111501589B (en) | 2020-04-21 | 2020-04-21 | Honeycomb highway sound insulation safety device against wind |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227237A (en) * | 2020-11-10 | 2021-01-15 | 广州地铁设计研究院股份有限公司 | Sound barrier containing air resonant cavity |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0010508A2 (en) * | 1978-10-24 | 1980-04-30 | G.T.M. Bâtiment et Travaux Publics (G.T.M.B.T.P.) S.A. dite: | Sound-absorbing wall, particularly for motorways |
| CN202380410U (en) * | 2011-12-20 | 2012-08-15 | 宁波市高等级公路建设指挥部 | Transportation sound absorption barrier with variable cross section and double cavities |
| CN104695344A (en) * | 2015-03-29 | 2015-06-10 | 杜秀枫 | Windproof dust inhibiting net |
| CN108004944A (en) * | 2016-10-29 | 2018-05-08 | 魏倩 | A kind of highway bridge paravent |
| DE202019000997U1 (en) * | 2019-03-01 | 2019-03-25 | Karl Wieser | Soundproofing system |
-
2020
- 2020-04-21 CN CN202010315754.1A patent/CN111501589B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0010508A2 (en) * | 1978-10-24 | 1980-04-30 | G.T.M. Bâtiment et Travaux Publics (G.T.M.B.T.P.) S.A. dite: | Sound-absorbing wall, particularly for motorways |
| CN202380410U (en) * | 2011-12-20 | 2012-08-15 | 宁波市高等级公路建设指挥部 | Transportation sound absorption barrier with variable cross section and double cavities |
| CN104695344A (en) * | 2015-03-29 | 2015-06-10 | 杜秀枫 | Windproof dust inhibiting net |
| CN108004944A (en) * | 2016-10-29 | 2018-05-08 | 魏倩 | A kind of highway bridge paravent |
| DE202019000997U1 (en) * | 2019-03-01 | 2019-03-25 | Karl Wieser | Soundproofing system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227237A (en) * | 2020-11-10 | 2021-01-15 | 广州地铁设计研究院股份有限公司 | Sound barrier containing air resonant cavity |
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