Totally closed sound barrier

Abstract

The invention discloses a totally closed sound barrier, and belongs to the field of environmental protection and the field of noise control facilities. The totally closed sound barrier comprises a gate-type steel frame (1) and sound barrier plates (2) laid on the gate-type steel frame (1). The sound barrier plates (2) include sound insulation and absorption barrier plates (21) and transparent sound barrier plates (22), and the sound insulation and absorption barrier plates (21) and the transparent sound barrier plates (22) are mounted on the outer side of the gate-type steel frame (1) together. The transparent sound barrier plates realize lighting effects for the inside of the sound barrier, so that the sound barrier has excellent sound insulation capacity while natural lighting is realized, an external sound insulation effect of the integral sound barrier is guaranteed, matching of sound insulation factors of the transparent sound barrier plates and the sound insulation and absorption barrier plates is guaranteed, the totally closed sound barrier is excellent in impact resistance performance and wind load resistance performance, and high safety of the structure of the sound barrier is guaranteed.

Description

technical field [0001] The invention relates to a facility for noise control in the field of environmental protection, in particular to a fully enclosed sound barrier. Background technique [0002] With the accelerated trend of road noise pollution and the improvement of national noise pollution standards for residential environments, in order to reduce the impact of railways, expressways and municipal roads on the surrounding environment, the Ministry of Environmental Protection, the National Development and Reform Commission, the Ministry of Science and Technology and other State Council 11th Several departments jointly issued the "Guiding Opinions on Strengthening the Prevention and Control of Environmental Noise Pollution and Improving the Quality of Urban and Rural Acoustic Environment", requiring that the four key pollution prevention and control efforts of transportation, construction, industry and life should be strengthened: supporting facilities on both sides of the...

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Problems solved by technology

[0005] 1) The sound-absorbing material in the comparison document is sprayed plant fiber, which is exposed to the air. The dust in the air and the particles of automobile exhaust will be adsorbed on the sound-absorbing material, which will affect the appearance and reduce the sound-absorbing effect.

[0006] 2) The daylighting part used in the above-mentioned patent documents is an ordinary daylighting panel, which has poor performance in sound insulation and sound absorption. Since the area of ​​this part occupies more than 10% of the road area, it will inevitably affect the entire sound insulation effect

[0007] 3) In the above literature, a ventilation and smoke exhaust part is opened on the upper part of the sound barrier, and the area of ​​this part is greater than 5% of the road area. By opening the long ventilation hole in the direction of road travel, and then setting the upper part of the long ventilation hole for rain protection The baffle, which relies on natural ventilation to discharge the smoke and dust inside the sound barrier, if the wind direction deviates, a large amount of exhaust smoke from vehicles in road traffic will gather in the sound barrier, and it is difficult to discharge it outside the sound barrier; at the same time, this ventilation opening It is also the outlet of the sound leakage inside the sound barrier, which further weakens the noise reduction performance of the sound barrier. There are more than 5% of the vents on the top, which cannot be regarded as truly fully enclosed. Ventilation openings diffract to sensitive points, causing the overall sound insulation of the sound barrier to decrease. According to theoretical analysis and calculation, 5% of the openings will reduce the overall sound insulation of the sound barrier by more than 10dB; Slippery, affecting traffic safety

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