Response of Infinite Beams on Geosynthetic-Reinforced Granular Bed over Soft Soil with Stone Columns under Moving Loads
Publication: International Journal of Geomechanics
Volume 13, Issue 6
Abstract
This paper pertains to the development of a simplified model for an infinite beam subjected to a concentrated load moving with constant velocity and resting on geosynthetic-reinforced granular bed over soft soil improved with stone columns. The granular fill has been modeled as a Pasternak shear layer while naturally occurring saturated soft soil has been idealized by a Kelvin-Voigt model, stone columns by Winkler springs, and geosynthetic as rough elastic membrane. Nonlinear behavior of granular fill, stone columns, and the soft soil has been represented by means of hyperbolic constitutive relationships. An iterative finite difference scheme has been adopted for obtaining the system response by employing the Gauss-Seidel technique. The system response has not been found to be sensitive at lower velocities of the applied load. Damping has been found to influence the response at higher velocities. Ultimate shear resistance of granular fill has a negligible effect on the response of the system.
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Acknowledgments
The authors are grateful to the anonymous reviewers for providing a larger perspective on the problem.
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Published In
International Journal of Geomechanics
Volume 13 • Issue 6 • December 2013
Pages: 713 - 728
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 10, 2011
Accepted: Nov 2, 2012
Published online: Nov 5, 2012
Published in print: Dec 1, 2013
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