Numerical Simulation of the Influence of Initial State of Sand on Element Tests and Micropile Performance
Publication: International Journal of Geomechanics
Volume 11, Issue 5
Abstract
This paper presents a state-dependent constitutive model for sand formulated within the critical-state framework and its implementation into a numerical analysis (FLAC3D) program. The implemented model was verified by using drained triaxial results on sands. The proposed model is shown to capture the stress path dependent behavior of sand over a wide range of densities and confining pressures well based on a unique set of parameters. Numerical simulations of the behavior of a micropile under vertical loading shows that the side and tip resistance, and thus the total resistance of the pile, are functions of the “in situ state” of soil as defined by the state parameter in which is the void ratio and the void ratio at the critical state.
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Acknowledgments
This study was sponsored by the Federal Highway AdministrationFHA and the Washington Department of TransportationWADOT. The authors are grateful to Drs. Roger Frank, Christophe Gaudin, and Jacques Garnier for their assistance in providing the data on Fontainebleau sand.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 11 • Issue 5 • October 2011
Pages: 370 - 380
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jan 12, 2010
Accepted: Sep 8, 2010
Published online: Sep 24, 2010
Published in print: Oct 1, 2011
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