1. Field Measurement and Research on Environmental Vibration due to Subway Systems: A Case Study in Eastern China
- Author
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Xunchang Li, Songtao Xue, Yan Chenglong, Minou Rabiei, Wei Yang, and Rui Xu
- Subjects
Ballast ,Vibration transmission ,Renewable Energy, Sustainability and the Environment ,business.industry ,Attenuation ,Geography, Planning and Development ,Vibration source ,Eastern china ,0211 other engineering and technologies ,020101 civil engineering ,ground-borne vibration ,02 engineering and technology ,Structural engineering ,Management, Monitoring, Policy and Law ,subway ,0201 civil engineering ,Vibration ,Vibration isolation ,vibration attenuation ,Environmental science ,Statistical analysis ,business ,vibration transmission ,vibration isolation design ,021101 geological & geomatics engineering - Abstract
With the rapid development of subway systems, the negative environmental impacts of vibration induced by subways has gradually become a research hotspot. For the purpose of developing predictive models of vibration and designing effective vibration mitigation systems, continuous field dynamic measurements were conducted simultaneously in a subway tunnel, ground, and building in eastern China, the most prosperous region in China. The characteristics of vibration transmission and attenuation induced by subway were analyzed by statistical analysis of large amounts of measurement data. The results showed that most prominent and visible attenuation of vibration is from the track to the ballast bed in the tunnel, where the ground-borne vibration would quickly decrease exponentially with distance. The results also showed that the measured attenuation value of indoor vibration was approximate 0.76 dB on average between each floor. Moreover, the decay ratio of the vibration increased with the increase in the frequency range. Based on these findings, construction gauge of 20&ndash, 25 m outside of the tunnel is recommended. In addition, reducing the vibration source excitation intensity is the most effective vibration isolation method, especially by track structural transformation.
- Published
- 2019
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