Author(s)

T. Xiaxin, C. Gaohang, Z. Jisheng & Z. Zhenghua

Abstract

The vibration and noise from rail traffic is an important impediment to traffic development in urban areas. In order to deal with the engineering measures needed to reduce environmental vibration, the attenuation of vibration caused by rail traffic along the segment between Huoying to Huilongguan of Beijing line 13 is observed and studied, and the result is reported in this paper. It shows that vertical components of the vibrations are much stronger than those of horizontal ones; the average peak acceleration of the vibration decreases gradually with the increasing from distance the railway. An attenuation equation of the average peak acceleration is presented in this paper by statistical analysis. However, there is no vibration attenuation at the distance from 50m to 60m, although there is a small amount from the wave guide effect caused by refraction and reflection at the buried rock surface. The high frequency vibration decreases fast and the low frequency vibration decreases relatively slower, so that the vibration near the railway is predominated by the high frequency component and the vibration in the far field is then predominated by the low frequency component. The effect of background vibration is not so large and mainly in the frequency range below 8 Hz. Finally, a new ground vibration level attenuation law is presented. Keywords: environmental vibration, urban rail transit, attenuation.

Keywords

environmental vibration, urban rail transit, attenuation