Acoustic and light gradient structure at the entrance of the tunnel

Abstract

The invention relates to an acousto-optic gradient structure at the entrance of a tunnel, which comprises a skeleton arranged at the entrance of the tunnel and straddling the road, the top of the skeleton is provided with sound-absorbing members at intervals, and a transparent structure is formed between adjacent sound-absorbing members. Light hole: The area of ​​the light-transmitting hole gradually decreases from the side away from the tunnel entrance to the side of the tunnel entrance. While reducing the impact of noise at the tunnel entrance on surrounding residents, it is not easy to impact the driver's vision, which is in line with the eye's perception of light. Comfort needs.

Description

technical field [0001] The invention relates to the technical field of tunnel noise reduction, in particular to an acousto-optic gradient structure at a tunnel entrance. Background technique [0002] The construction of urban expressways has brought convenience to traffic, shortened the distance between the outer suburbs and the central area, made the overall integration and development of the city possible, and greatly promoted the social and economic development of the city. A series of viaducts and underpass tunnels also came into being and became an indispensable part. While we have achieved unprecedented development, the noise nuisance problem of urban bridges and tunnels has become increasingly prominent. [0003] However, the current noise reduction in urban tunnels only considers the noise reduction in the closed section of the tunnel, and only decorates the sound-absorbing panels on the side walls of the tunnel. The noise reduction effect is only to reduce the inte...

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Problems solved by technology

[0003] However, the current noise reduction in urban tunnels only considers the noise reduction in the closed section of the tunnel, and only decorates the sound-absorbing panels on the side walls of the tunnel. The noise reduction effect is only to reduce the internal noise of the closed section to a certain extent. The surface and the top are also hard reflective surfaces. These sounds are reverberated inside, which significantly increases the sound pressure level in the tunnel, and the noise at the entrance and exit is stronger. The horn-mouth effect noise formed outside the tunnel entrance seriously exceeds the standard. Most of the complaints come from this, and no reasonable solution exists yet

At the same time, tunnels have the problem of light changes from the tunnel entrance to the interior of the tunnel. The sharp change of light and darkness has a serious visual impact and seriously affects driving safety. Therefore, there is currently a lot of noise at the tunnel entrance, which is likely to affect the surrounding residents, and the sharp change of light is easy to affect driving. problem of visual impact

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