Acoustic barrier

A technology of sound barrier and sound-absorbing panel, applied in the field of high-speed railway sound barrier and high-speed railway noise control, can solve the problem of installation and fixed structure without further consideration of on-site construction needs, no new material technology exploration, sound-absorbing panels are not easy to process, etc. problems, to achieve the effect of convenient material transportation, excellent noise reduction function, and dimensional stability
CN103526700AActive Publication Date: 2014-01-22CHENGDU ZHONGHONG RAIL TRANSIT ENVIRONMENTAL PROTECTION IND +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
CHENGDU ZHONGHONG RAIL TRANSIT ENVIRONMENTAL PROTECTION IND
Publication Date
2014-01-22

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Abstract

The invention discloses an acoustic barrier comprising supporting rib columns, acoustic boards and a back board. A hollow structure is formed between the acoustic boards and the back board, and the supporting rib columns are fixedly bonded on a railway foundation. The acoustic boards are microporous ceramic composite boards with three-dimensional meshy pore structures in disordered communication. The acoustic barrier composed of the supporting rib columns, the acoustic boards and the back board has a camber surface, and the concave direction of the camber surface faces to a railway train operation surface. The lower edge of the back board extends out of the bottom ends of the supporting rib columns. The acoustic barrier is of a three-layer hollow acoustic-absorption acoustic structure, and the microporous ceramic composite boards adopted as the acoustic boards not only have an excellent noise reduction function but also have better processability; the noise-reduction acoustic barrier of the camber-surface structure has better acoustic absorption and reflection properties, and escaped noise can be further reduced. Tests prove that the acoustic barrier has better acoustic absorption performance, and is high in acoustic absorptivity, wide in acoustic absorption frequency band and low in low-frequency acoustic absorption effect. A prefabricated structure of the acoustic barrier is more convenient to process and install, and higher in construction efficiency.
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Description

Technical field

[0001] The present invention belongs to the field of railway operation noise control technology, especially in high -speed railway noise control technology, which involves a sound barrier applied to high -speed railway. Background technique

[0002] The sound barrier is a facility inserted between the sound source and the receiver, so that the sound wave spreads a significant additional attenuation, thereby weakening the noise effect in a certain area where the receiver is located.

[0003] The sound absorbing material used in high -speed rail sound barrier is first of all, its sound absorption performance must meet the requirements of the sound barrier structure design requirements, and its noise reduction coefficient NRC> 0.5; as an outdoor sound absorption material, it should also have good mechanical performance and weather resistance, Can not only bear the joint effects of train gas and wind load, but also to be able to withstand wind and rain, sun exposur...

Claims

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