Noise reduction measure for trussed non-slab bridges

Abstract

In this paper, we introduce that noise reduction can be realized by corrective grinding at rail joints of the bridge section. The noise level was reduced by about 4 to 5 dB before and after rail corrective grinding. Also in the frequency characteristic analysis, the noise reduction effect was recognized in a wide frequency band of 50 to 8 k Hz. Furthermore, In light of the results delivered by this corrective grinding, we implemented corrective grinding at rail joints in a continuous, roughly 250-m section, and measured noise levels. Approximately 10 dB noise level was reduced before and after rail corrective grinding, and the noise level was reduced in all frequency bands.