Isolation of Train-Induced Ground-Borne Vibration by Trenches on a Poroelastic Half-Space
Publication: Journal of Engineering Mechanics
Volume 139, Issue 5
Abstract
The screening effects of trenches on train-induced ground vibration are investigated by an analytical method. The embankment and soil banks beside the trench are modeled as elastic layers with appropriate widths. A fully saturated poroelastic half-space is first utilized in the investigation of the isolation of train-induced ground vibration. Biot’s theory is applied to characterize the saturated poroelastic half-space, considering the coupling between the soil skeleton and the fluid. Based on Fourier transforms and Fourier series, the governing equations are solved. The various performances of the trenches on the single-phase elastic half-space and saturated poroelastic half-space as screening barriers to mitigate the ground vibration are specially investigated. It is found for the vibration generated by the axle train load with supercritical speed that the discrepancy between the screening efficiency of the trenches on the poroelastic half-space and elastic half-space is significant; the single-phase elastic half-space model may significantly underestimate the screening effect of the trench. In addition, an excellent screening effect can be achieved by an open trench to the ground vibrations generated by the dynamic wheel-rail load.
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Acknowledgments
The work presented in this paper is supported by the National Science Foundation of China (Grant Nos. 51025827 and 51208460) and the China Postdoctoral Science Foundation (Grant No. 2012M511371).
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Published In
Journal of Engineering Mechanics
Volume 139 • Issue 5 • May 2013
Pages: 580 - 593
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 19, 2010
Accepted: Jul 9, 2012
Published online: Jul 30, 2012
Published in print: May 1, 2013
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