An urban rail transit viaduct sound barrier

Abstract

The invention provides a sound barrier for an urban rail transit viaduct. Sound waves can be reflected for multiple times through a plurality of sound refracting faces, and thus first-stage sound attenuation is achieved; sound attenuation small pores of a first sound attenuation plate and a first sound attenuation cavity form a small pore sound attenuation structure, and thus second-stage sound attenuation is achieved; sound attenuation small pores of a second sound attenuation plate and a second sound attenuation cavity form third-stage sound attenuation; the sound attenuation small pores inthe first sound attenuation plate and the second sound attenuation plate are formed in a staggered mode so as to form a bent sound attenuation channel, and thus fourth-stage sound attenuation is achieved; sponge sound absorbing layers can absorb sound wave vibration, and thus fifth-stage sound attenuation is achieved; bags are made of flexible materials, sound wave transmitting can be hindered, and thus sixth-stage sound attenuation is achieved; and elastic resin particles in the bags are resistive materials, gaps are formed between the elastic resin particles, and thus seventh-stage sound attenuation is achieved. Through combination of all stages of sound attenuation structures, the good reducing effect on the high frequency part and the lower frequency part of sound can be achieved, andthe sound attenuation effect is good; and the structures are just simply and structurally combined, the price of the materials are not high, and thus the cost is low.

Description

technical field [0001] The invention relates to the technical field of rail transit noise control, in particular to an urban rail transit viaduct sound barrier. Background technique [0002] Rail transit has become one of the most effective control measures to solve ground traffic congestion and improve people's travel. At the same time, the vibration and noise pollution of rail transit has increasingly become a prominent factor affecting the urban environment. The noise generated by rail transit is a problem that cannot be ignored. It interferes with people's work and study, and damages people's physical and mental health. Severe noise can even cause the areas along the line to lose their original functions and affect the commercial value of the areas along the line. How to take control measures to eliminate or reduce the noise pollution brought by rail transit is one of the important aspects of rail transit research. [0003] The noise at the viaduct of urban rail transi...

AI Technical Summary

Problems solved by technology

At present, the sound barriers mainly used are either complex in structure, or relatively simple in structure but poor in shielding effect, or costly and impractical.

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