CN112878223A - Vertical metal sound barrier unit plate - Google Patents
Vertical metal sound barrier unit plate Download PDFInfo
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- CN112878223A CN112878223A CN202110312590.1A CN202110312590A CN112878223A CN 112878223 A CN112878223 A CN 112878223A CN 202110312590 A CN202110312590 A CN 202110312590A CN 112878223 A CN112878223 A CN 112878223A
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Classifications
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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
-
- 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
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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
- E01F8/0023—Details, e.g. foundations
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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
- E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention provides a vertical type metal sound barrier unit plate, which comprises a sound absorption module, wherein a perforated panel is arranged on one side of the sound absorption module, which faces a sound source, and is provided with a first perforated plate and a second perforated plate, the first perforated plate is positioned above the second perforated plate, the first perforated plate is gradually far away from the sound absorption module from top to bottom along the height direction, the second perforated plate is gradually close to the sound absorption module, the lower end of the first perforated plate is connected with the second perforated plate, and a rain shield is arranged outside an orifice of a first hole arranged on the first perforated plate. According to the invention, the cotton volume weight increase, load increase and mildew aging caused by water seepage of the sound absorption module can be avoided, the sound absorption effect is improved, and the service life is prolonged.
Description
Technical Field
The invention belongs to the technical field of noise reduction barrier design, and particularly relates to a vertical type metal sound barrier unit plate.
Background
With the continuous progress and development of the traffic industry in China, the construction mileage of high-speed rail, rail traffic, municipal roads, highways and other traffic meets the requirements of people on personnel trip, cargo traffic and information exchange at a greatly increased speed, and China gradually becomes a country on wheels and rails. The car of traveling on the road, train on the track can produce stronger traffic noise when passing through city, suburb and rural area, the kind of noise is also diversified, there are wheel rail noise, aerodynamic noise, tire friction noise, whistle noise etc. and along with the continuous increase of speed, the intensity of noise, degree of exceeding standard and degree of harm are also bigger and bigger, bring direct and indirect influence with work for people's life, influence thinking, sleep, harm auditory system, it can produce adverse effect to the health to go down for a long time.
Noise sources of high-speed rail, rail traffic, municipal roads, highways and other traffic are mainly wheel-rail or tire noise when the speed is low, and are mainly aerodynamic noise when the speed is high, and noise and vibration are generated when the vehicle runs at high speed, so that the noise and vibration are controlled at the same time, which is very important for the vehicle running at high speed. The sound barrier is used as an effective treatment mode of traffic noise, plays more and more important roles, the materials of the existing sound barrier comprise a metal sound barrier plate, a transparent sound barrier plate and a non-metal sound barrier plate (cement, perlite and the like), the transparent sound barrier plate has good lighting effect and viewing function, the sound insulation capacity is large, the light transmittance is high, the sound barrier is widely used in actual engineering, and good effect is achieved.
The existing metal sound barrier plate structure is generally a perforated sound absorption metal panel, a sound absorption module (polyester fiber cotton or glass fiber cotton), a sound insulation metal panel and an internal supporting framework. There are major problems: the structure of the perforated panel is easy to cause water seepage points to the sound absorption module in rainy and snowy weather, so that the volume weight of cotton is increased, the load is increased, and the cotton is mildewed and aged to influence the sound absorption effect and the service life; the back plate is easy to generate strong vibration at high speed to form secondary noise; the upper and lower splicing grooves are easy to generate larger deformation or fracture by adopting a sharp corner method, so that the structural strength and the installation efficiency are influenced.
Therefore, there is a need to develop a vertical metal sound barrier unit plate that effectively solves the above problems to meet the noise reduction requirement and the safety and operation requirement of the transportation means such as high-speed rail and rail transit.
Disclosure of Invention
Therefore, the invention provides a vertical metal sound barrier unit plate, which overcomes the defects that the structure of a perforated panel in the prior art is easy to cause water seepage points to a sound absorption module in rainy and snowy weather, so that the volume weight of cotton is increased, the load is increased, mildew and aging are generated, and the sound absorption effect and the service life are influenced.
In order to solve the above problems, the invention provides a vertical metal sound barrier cell plate, which comprises a sound absorption module, wherein a perforated panel is arranged on one side of the sound absorption module facing a sound source, the perforated panel is provided with a first perforated plate and a second perforated plate, the first perforated plate is positioned above the second perforated plate, the first perforated plate is gradually far away from the sound absorption module from top to bottom along the height direction, the second perforated plate is gradually close to the sound absorption module, the lower end of the first perforated plate is connected with the second perforated plate, and a rain shield is arranged outside an orifice of a first hole arranged on the first perforated plate.
Preferably, the bending angle formed between the first perforated plate and the second perforated plate is a, and a is more than or equal to 15 degrees and less than or equal to 85 degrees.
Preferably, the first holes are louver holes, the horizontal length of the louver holes is La which is more than or equal to 50mm and less than or equal to 400mm, the vertical width of the louver holes is Wa, and Wa is more than or equal to 5mm and less than or equal to 30 mm; and/or the second perforated plate is provided with a second hole which is a round hole, the aperture of the second hole is D, and D is larger than or equal to 2mm and smaller than or equal to 10 mm.
Preferably, the perforated panel is made of one of a galvanized steel plate, an aluminum alloy plate, a stainless steel plate and a titanium alloy plate; and/or the perforated panel has a thickness of da, wherein the thickness of da is more than or equal to 0.5mm and less than or equal to 5 mm; and/or the second perforated plate has a perforation rate of
Preferably, the vertical metal sound barrier unit plate further comprises a back plate, the top of the back plate is fastened with the top of the perforated panel, and the bottom of the back plate is fastened with the bottom of the perforated panel.
Preferably, the bottom of the perforated panel is provided with a drainage groove; and/or a sound insulation damping layer is arranged on one side, facing the sound absorption module, of the back plate.
Preferably, the upper end and the lower end of the sound absorption module are respectively connected with an upper fixed support and a lower fixed support, the upper fixed support and the lower fixed support are respectively provided with a clamping groove adaptive to the thickness of the sound absorption module, and the perforated panel and the back plate are positioned at the outer sides of the upper fixed support and the lower fixed support; and/or the sound insulation damping layer is made of fine iron powder and asphalt.
Preferably, the top of perforation panel is equipped with first top level and bends the board, the bottom of perforation panel is equipped with first bottom level and bends the board, first top level is bent and is equipped with the bellied first boss that makes progress on the board, first bottom level is bent and is equipped with first recess on the board, the top of backplate is equipped with second top level and bends the board, the bottom of backplate is equipped with second bottom level and bends the board, second top level is bent and is equipped with the second boss on the board, second bottom level is bent and is equipped with the second recess on the board, first boss with second boss lock, first recess with second recess lock, first boss reaches the top of second boss is plane or cambered surface, first recess reaches the tank bottom of second recess is plane or cambered surface.
Preferably, the left side and the right side of the perforated panel are further provided with first bending side plates, the left side and the right side of the back plate are further provided with second bending side plates, and when the perforated panel and the back plate are assembled, the second bending side plates are located on the outer sides of the first bending side plates.
Preferably, the outer side of the second bending side plate is provided with a falling prevention device.
According to the vertical metal sound barrier unit plate, the first perforated plate positioned above forms a rain shielding effect on the second perforated plate positioned below the first perforated plate, rain and snow can be prevented from entering the interior of the sound barrier unit plate through the second holes in the second perforated plate, meanwhile, the first holes in the first perforated plate can also prevent rain and snow from entering the interior of the sound barrier unit plate through the first holes due to the arrangement of the rain shielding cover, so that the increase of cotton volume weight, load increase and mildew aging caused by water seepage of the sound absorption module are avoided, the sound absorption effect is improved, and the service life is prolonged.
Drawings
Fig. 1 is a schematic perspective view of a vertical metal sound barrier unit plate according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of the perforated panel of FIG. 1;
FIG. 3 is a schematic perspective view of the back plate shown in FIG. 1;
fig. 4 is a schematic view of an internal structure of a vertical metal sound barrier unit plate according to an embodiment of the present invention;
fig. 5 is a schematic view of an internal structure of a vertical metal sound barrier unit plate according to another embodiment of the present invention;
fig. 6 is a schematic view of an internal structure of a vertical metal sound barrier unit panel according to another embodiment of the present invention.
The reference numerals are represented as:
21. a sound absorption module; 211. sound absorbing cotton; 212. a protective surface layer; 22. a perforated panel; 221. a first perforated plate; 222. a second perforated plate; 223. a first top horizontal bending plate; 224. a first bottom horizontal bending plate; 225. a first boss; 226. a first groove; 227. a first bent side plate; 228. a rain shield; 23. a back plate; 231. a sound insulation damping layer; 232. a second top horizontal bending plate; 233. a second bottom horizontal bending plate; 234. a second boss; 235. a second groove; 236. a second bent side plate; 24. a water drainage tank; 251. an upper fixed support; 252. a lower fixed support; 100. an anti-falling device.
Detailed Description
Referring to fig. 1 to 6 in combination, according to an embodiment of the present invention, there is provided an upright type metallic sound barrier cell panel, including a sound absorption module 21, a perforated panel 22 is arranged on one side of the sound absorption module 21 facing the sound source, a back plate 23 is arranged on one side of the sound absorption module 21 departing from the sound source, the perforated panel 22 and the back plate 23 are assembled and connected into a whole, and together wrap the outer peripheral side of the sound absorption module 21, the perforated panel 22 has a first perforated plate 221 and a second perforated plate 222, the first perforated plate 221 is located above the second perforated plate 222, from top to bottom in the height direction, the first perforated plate 221 is gradually spaced apart from the sound absorption module 21, the second perforated plate 222 is gradually close to the sound absorption module 21 and the lower end of the first perforated plate 221 is connected to the second perforated plate 222, a rain shield 228 is provided outside the aperture of the first hole provided in the first perforated plate 221. In this technical scheme, be in the top first perforated plate 221 forms the effect of keeping off the rain to second perforated plate 222 that is in its below, can prevent the sleet via the inside of second hole entering sound barrier cell board on the second perforated plate 222, simultaneously first hole on the first perforated plate 221 then owing the inside that the sleet got into the sound barrier cell board via first hole also can be blockked in the setting of rain cover 228, thereby stop sound absorption module 21 infiltration leads to cotton volume weight to increase, the load increases, produces and mildenes and rot ageing, improves sound absorption effect and life. The vertical metal barrier unit plate disclosed by the invention is matched and embedded with the vertical upright post.
In some embodiments, the bending angle formed between the first perforated plate 221 and the second perforated plate 222 is a, 15 ° ≦ a ≦ 85 °, so as to maximize the rain-shielding range of the first perforated plate 221 to the second perforated plate 222.
Furthermore, the first holes are louver holes, the horizontal length of the louver holes is La which is not less than 50mm and not more than 400mm, the vertical width of the louver holes is Wa which is not less than 5mm and not more than 30 mm; the second perforated plate 222 is provided with a second hole which is a round hole, the aperture of the second hole is D, D is larger than or equal to 2mm and smaller than or equal to 10mm, and the perforation rate of the second perforated plate 222 is
So as to further improve the sound absorption effect of the sound barrier unit plate. The perforated panel 22 is made of one of a galvanized steel plate, an aluminum alloy plate, a stainless steel plate and a titanium alloy plate, the perforated panel 22 is da thick, 0.5mm is less than or equal to da and less than or equal to 5mm, the corrosion resistance of the perforated panel 22 can be improved, the service life of the perforated panel is prolonged, and the back plate 23 can be the same as the perforated panel 22 in the aspect of selection of materials and thickness. The perforated panel 22 and the outer side of the back plate 23 may be subjected to corrosion prevention measures such as galvanization, powder spraying, fluorocarbon spraying, paint baking, passivation, and the like, and preferably, may further have a self-cleaning layer (also referred to as a self-cleaning coating) so that the transparent sound barrier unit plate has a self-cleaning function to prevent dust deposition and rain marks.
In some embodiments, the top of the back plate 23 is fastened to the top of the perforated panel 22, and the bottom of the back plate 23 is fastened to the bottom of the perforated panel 22, so that the back plate 23 is not connected to the perforated panel 22 by bolts, thereby reducing the difficulty in assembling the back plate 23 and the perforated panel 22, and effectively avoiding the potential safety hazard caused by loosening after long-term use by bolt connection or riveting.
Further, the bottom of the perforated panel 22 is provided with a drainage groove 24 to guide and collect and timely discharge a small amount of rain and snow entering the sound barrier unit plate through the first hole or the second hole.
In some embodiments, a sound insulation and damping layer 231 is disposed on a side of the back plate 23 facing the sound absorption module 21, and the sound insulation and damping layer 231 may be made of high-purity fine iron powder or asphalt, for example. The thickness of the sound insulation damping layer 231 is preferably 0.5 mm-10 mm.
In some embodiments, an upper fixing support 251 and a lower fixing support 252 are respectively connected to the upper end and the lower end of the sound absorption module 21, a slot corresponding to the thickness of the sound absorption module 21 is respectively configured on the upper fixing support 251 and the lower fixing support 252, and the perforated panel 22 and the back plate 23 are located at the outer sides of the upper fixing support 251 and the lower fixing support 252, so that the position of the sound absorption module 21 can be more stable and reliable. The upper fixing support 251 and the lower fixing support 252 may be made of a galvanized steel sheet or a stainless steel sheet by folding, or may be made of an aluminum profile by customizing, and the thickness of the plate material is preferably 0.8mm to 5 mm.
A first top end horizontal bending plate 223 is arranged at the top end of the perforated panel 22, a first bottom end horizontal bending plate 224 is arranged at the bottom end of the perforated panel 22, a first boss 225 protruding upwards is arranged on the first top end horizontal bending plate 223, a first groove 226 is arranged on the first bottom end horizontal bending plate 224, a second top end horizontal bending plate 232 is arranged at the top end of the back plate 23, a second bottom end horizontal bending plate 233 is arranged at the bottom end of the back plate 23, a second boss 234 is arranged on the second top end horizontal bending plate 232, a second groove 235 is arranged on the second bottom end horizontal bending plate 233, the first boss 225 is engaged with the second boss 234, the first recess 226 is engaged with the second recess 235, the tops of the first boss 225 and the second boss 234 are flat surfaces or arc surfaces, and the bottoms of the first groove 226 and the second groove 235 are flat surfaces or arc surfaces. The lug boss or the groove with the plane or arc surface structure is adopted to form the splicing groove between two adjacent unit plates, so that the defects that the splicing groove is easy to generate large deformation or crack by adopting a sharp angle method and the structural strength and the installation efficiency are influenced in the prior art can be effectively overcome.
Further, a first bending side plate 227 is further disposed on each of the left and right sides of the perforated panel 22, a second bending side plate 236 is further disposed on each of the left and right sides of the back plate 23, and when the perforated panel 22 is assembled with the back plate 23, the second bending side plate 236 is located outside the first bending side plate 227.
In some embodiments, the anti-falling device 100 is disposed on the outer side of the second bent side plate 236, and the anti-falling device 100 can string the metal sound barrier unit plates together through a steel wire rope and then fix the metal sound barrier unit plates on a steel structure (a sound barrier upright post), so as to reduce the possibility that pedestrians and vehicles are injured by falling of the metal sound barrier unit plates under severe impact of foreign objects or large vibration, and increase the safety factor.
In some embodiments, the sound absorption module 21 includes sound absorption cotton 211, a facing layer 212 is disposed on one side of the sound absorption cotton 211 facing the perforated panel 22, the facing layer 212 is made of one of a waterproof and breathable film, an alkali-free hydrophobic glass cloth, a non-woven fabric and a PVF film, and the facing layer 212 has a thickness t which is 0.1mm or more and 5mm or less. The armor layer 212 can be right the sound absorption cotton 211 forms the protection, further reduces outside sleet infiltration the possibility of sound absorption cotton 211, and then further promotes its life and sound absorption effect. The sound absorption cotton 211 is preferably made of one of glass silk floss, rock wool, polyester fiber, melamine, foamed aluminum, aluminum fiber and the like, and has a thickness of 4mm to 150 mm.
In some embodiments, as shown in fig. 6, the facing layer 212 is closely attached to the side of the sound absorption cotton 211 facing the sound source, and as a more preferable embodiment, a first distance is provided between the facing layer 212 and the sound absorption cotton 211, so that two sound absorption cavities can be formed between the sound absorption cotton 211 and the perforated panel 22, thereby making the sound absorption effect of the metal sound barrier unit plate better.
Further, as shown in fig. 6, a second distance is provided between the sound absorption cotton 211 and the back plate 23, so that another sound absorption cavity is formed between the sound absorption cotton 211 and the back plate 23, thereby forming three sound absorption cavities in the metal sound barrier unit plate, and further improving the sound absorption effect of the metal sound barrier unit plate.
It should be noted that the sound insulation amount of the vertical metal sound barrier unit plate should be not less than 30dBA, the noise reduction coefficient should be not less than 0.7, and the thickness of the unit plate is 50 mm-200 mm. The connection between two unit plates spliced with each other in the same sound barrier can adopt a buckling type, a snap type, a tongue-and-groove type and a flat type, and rubber materials are adopted for sealing and sound leakage prevention between the plates and the upright posts.
The vertical type metal sound barrier unit plate body can be assembled by adopting the following steps:
firstly, the protective layer 212 wraps and covers the periphery of the sound absorption cotton 211, and then an upper fixing support 251 and a lower fixing support 252 are respectively buckled on the wrapped sound absorption cotton 211 to form a sound absorption module 21;
secondly, fixing the back plate 23 on the tool, fixing the periphery of the back plate, pulling the back plate to an angle, and then placing the sound absorption module 21 in the tool so that the upper fixing support 251 and the lower fixing support 252 of the sound absorption module 21 are respectively clamped at the concave-convex grooves;
thirdly, loosening the back plate 23, then buckling the perforated panel 22 on the back plate 23, and paying attention to the fact that the water drainage groove 24 is located below and is not reversely installed;
fourthly, after the back plate 23, the sound absorption module 21 and the perforated panel 22 are assembled into a whole, the falling prevention devices 100 are fixed at the middle positions of the two side surfaces of the unit plate, and thus the assembly of the whole metal sound barrier unit plate is completed.
The vertical metal sound barrier unit plate can be used in the industries of high-speed rails, rail transit, municipal roads, highways and the like.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a vertical type metal sound barrier cell board, its characterized in that, includes sound absorption module (21), sound absorption module (21) is equipped with perforation panel (22) towards one side of sound source, perforation panel (22) have first perforated plate (221), second perforated plate (222), first perforated plate (221) are in the top of second perforated plate (222), along direction of height top-down, first perforated plate (221) are kept away from gradually sound absorption module (21), second perforated plate (222) are close to gradually sound absorption module (21) just the lower extreme of first perforated plate (221) with second perforated plate (222) are connected, the drill way outside of the first hole that has on first perforated plate (221) is equipped with weather shield (228).
2. The upright type metallic sound barrier cell plate of claim 1, wherein a bending angle formed between the first perforated plate (221) and the second perforated plate (222) is a, 15 ° ≦ a ≦ 85 °.
3. The upright type metallic sound barrier cell plate of claim 1, wherein the first hole is a louver hole, the louver hole has a horizontal length of La, La is 50mm & lt, La & lt, 400mm, and a vertical width of Wa is 5mm & lt, Wa & lt, 30 mm; and/or the second perforated plate (222) is provided with a second hole which is a round hole, the aperture of the second hole is D, and D is larger than or equal to 2mm and smaller than or equal to 10 mm.
4. The upright type metallic sound barrier unit plate of claim 3, wherein the perforated panel (22) is made of one of galvanized steel plate, aluminum alloy plate, stainless steel plate, titanium alloy plate; and/or the thickness of the perforated panel (22) is da, and the da is more than or equal to 0.5mm and less than or equal to 5 mm; and/or the second perforated plate (222) has a perforation rate of
5. The upright metallic sound barrier cell plate of claim 1, further comprising a back plate (23), wherein the top of the back plate (23) is fastened to the top of the perforated panel (22), and the bottom of the back plate (23) is fastened to the bottom of the perforated panel (22).
6. The upright metallic sound barrier cell panel according to claim 5, wherein a drainage groove (24) is provided at the bottom of said perforated panel (22); and/or a sound insulation damping layer (231) is arranged on one side, facing the sound absorption module (21), of the back plate (23).
7. The upright type metal sound barrier cell plate of claim 6, wherein the upper end and the lower end of the sound absorption module (21) are respectively connected with an upper fixed support (251) and a lower fixed support (252), the upper fixed support (251) and the lower fixed support (252) are respectively configured with a slot corresponding to the thickness of the sound absorption module (21), and the perforated panel (22) and the back plate (23) are positioned at the outer sides of the upper fixed support (251) and the lower fixed support (252); and/or the sound insulation damping layer (231) is made of fine iron powder and asphalt.
8. The vertical type metal sound barrier unit plate of claim 5, wherein a first top end horizontal bending plate (223) is disposed at the top end of the perforated panel (22), a first bottom end horizontal bending plate (224) is disposed at the bottom end of the perforated panel (22), a first boss (225) protruding upwards is disposed on the first top end horizontal bending plate (223), a first groove (226) is disposed on the first bottom end horizontal bending plate (224), a second top end horizontal bending plate (232) is disposed at the top end of the back plate (23), a second bottom end horizontal bending plate (233) is disposed at the bottom end of the back plate (23), a second boss (234) is disposed on the second top end horizontal bending plate (232), a second groove (235) is disposed on the second bottom end horizontal bending plate (233), and the first boss (225) is fastened with the second boss (234), the first groove (226) is buckled with the second groove (235), the tops of the first boss (225) and the second boss (234) are planes or arc surfaces, and the bottoms of the first groove (226) and the second groove (235) are planes or arc surfaces.
9. The upright type metallic sound barrier cell plate of claim 5, wherein the perforated panel (22) is further provided with a first bent side plate (227) at left and right sides thereof, and the back plate (23) is further provided with a second bent side plate (236) at left and right sides thereof, wherein the second bent side plate (236) is located at an outer side of the first bent side plate (227) when the perforated panel (22) and the back plate (23) are assembled.
10. The upright metallic sound barrier cell panel of claim 9, wherein said second bent side panel (236) is provided with a fall arrest device (100) on the outside.
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| CN202110312590.1A CN112878223A (en) | 2021-03-24 | 2021-03-24 | Vertical metal sound barrier unit plate |
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| CN202110312590.1A CN112878223A (en) | 2021-03-24 | 2021-03-24 | Vertical metal sound barrier unit plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322783A (en) * | 2021-06-11 | 2021-08-31 | 湖南大学 | Sound barrier device and method for inhibiting vortex-induced resonance of girder of long-span bridge |
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