Influence of Cyclic Stress Pulse Shapes on Filtration Behavior of Railway Subballast
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 2
Abstract
Filtration behavior of subballast materials subjected to different cyclic stress pulse shapes at frequencies of 5 Hz and 10 Hz was investigated in the laboratory. Clayey silt was used as a base soil while graded crushed basalt was used as a filter. Rectangular, sinusoidal, and triangular cyclic stress pulse shapes having a stress range of 70–140 kPa were investigated for a piping ratio of 9. Turbidity, permeability, and change of pore water pressure within base soil were recorded over time as the number of stress pulse cycles increased. Results show that triangular and sinusoidal cyclic stress pulse shapes have a similar effect on the filtration behavior while the rectangular cyclic pulse shape had a slightly higher effect than triangular and sinusoidal stress pulse shapes. Based on this study, a piping ratio of 9 was found to be satisfactory for all cyclic stress pulse shapes at 5 Hz.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 2 • February 2012
Pages: 230 - 235
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Sep 27, 2010
Accepted: Apr 18, 2011
Published online: Apr 20, 2011
Published in print: Feb 1, 2012
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