Load-shedding type sound barrier structure for high speed railway

Abstract

The invention discloses a load-shedding type sound barrier structure for a high speed railway. The load-shedding type sound barrier structure comprises H-shaped steel upright posts arranged at two ends, and multiple sound barrier unit plates arranged between the two H-shaped steel upright posts, wherein each sound barrier unit plate consists of inverted-V-shaped sound absorption units with the spacing of 50-75mm; each inverted-V-shaped sound absorption unit comprises a sound absorption and insulation structure consisting of an inverted-V-shaped sound absorption unit backboard and an inverted-V-shaped sound absorption unit perforated plate, and a sound absorption material filled in the sound absorption and insulation structure. When a high speed train passes, a pneumatic train load which acts on the surface of a sound barrier can be effectively reduced through reasonable spacings among the sound absorption units. According to mathematical model calculation and physical model tests, the pneumatic train load can be reduced by 20-30 percent, the stability of the sound barrier under the all-weather operating conditions, and the operating safety of the high speed railway can be guaranteed. Due to tapping and load-shedding, the noise reduction effect of the conventional sound barrier is kept, and an optimized scheme is provided for the noise reduction measure design and subsequent possible acceleration reconstruction in high speed railway construction.

Description

technical field [0001] The invention relates to a noise reduction device for railways, in particular to provide a load-reducing sound barrier structure for high-speed railways aimed at the problem that the aerodynamic load of high-speed railway trains is greatly affected. Background technique [0002] The noise sources of high-speed railways are complex, and the noise of train operation is large, which has a great impact on the surrounding acoustic environment. If effective control measures are not taken, the environmental standards cannot be met. [0003] At present, the noise control measures for high-speed railway operations mostly adopt vertical sound barriers. The sound barrier unit panels are mostly made of solid materials, and the size is mostly 500*2000mm or 430*2000mm. Sound absorption, sound insulation. [0004] The high-speed railway runs fast, and the sound barrier is relatively close to the center line of the outer rail of the line. The surface of the sound ba...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that high-speed trains generate huge train aerodynamic loads on the surface of a sound barrier placed at a close distance, the invention provides a load-reducing sound barrier structure for high-speed railways

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