Mitigation of Ground Vibration Generated by High-Speed Trains on Saturated Poroelastic Ground with Under-Sleeper Pads
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Volume 140, Issue 1
Abstract
Train-induced track and ground vibrations accelerate the deterioration of track, cause nuisance to nearby residents, and even damage adjacent structures. Past research has shown that under-sleeper pads (USPs) are effective at improving track performance and insulating ground vibrations generated by moving trains. The present study was the first to investigate the effectiveness of USP at reducing train-induced ground vibrations at both subcritical and supercritical train speeds (critical speed is defined as the Rayleigh wave speed of the ground surface) and was the first to study the effectiveness of USP at reducing ground vibrations with a two-phase poroelastic soil model. A vehicle-track-ground model containing a fully saturated poroelastic half-space was established, and the whole system was solved by a semianalytical method using Fourier transforms and Fourier series. The differences in the performance of the USPs on saturated poroelastic ground and single-phase elastic ground were examined. It was found that the USPs effectively reduced free-field ground vibrations at subcritical train speeds, but the USP insulation effectiveness was minimized at supercritical train speeds. USPs might also reduce excess pore water pressure in the ground during the passage of a train.
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Acknowledgments
The work presented in this paper was jointly supported by the National Natural Science Foundation of China (Grants 51208460 and 51025827), the China Postdoctoral Science Foundation (Grant 2012M511371), and the Doctoral Fund of the Ministry of Education of China (Grant J20110045).
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Published In
Journal of Transportation Engineering
Volume 140 • Issue 1 • January 2014
Pages: 12 - 22
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 30, 2013
Accepted: Aug 12, 2013
Published online: Aug 14, 2013
Published in print: Jan 1, 2014
Discussion open until: Jan 14, 2014
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