Experimental and 3D Numerical Study on Time-Dependent Behavior of Stone Column–Supported Embankments
Publication: International Journal of Geomechanics
Volume 18, Issue 4
Abstract
In this study, laboratory model tests and three-dimensional (3D) numerical analysis were carried out on stone column–improved ground under embankment loading. In the experimental study, the time-dependent change in stress on the stone column and clay (at the embankment–ground interface) was measured for different spacing-to-diameter ratios. Finite-difference software was used for further investigation to measure the change in settlements, stresses, and pore pressures with time. In the numerical analysis, the stone column and the sand embankment were represented with the Mohr-Coulomb model, whereas the modified Cam-clay model was used for the soft clay. It was observed that to ensure no differential settlement on the embankment surface, a minimum embankment height of 2 times the clear spacing between the stone columns is necessary. The maximum lateral deformation of the stone column was observed at approximately 2.5 times the diameter of the column from the top.
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Acknowledgments
The authors sincerely acknowledge the financial support provided by SERB, Department of Science and Technology, India, for this research work.
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Published In
International Journal of Geomechanics
Volume 18 • Issue 4 • April 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Apr 27, 2017
Accepted: Oct 11, 2017
Published online: Jan 19, 2018
Published in print: Apr 1, 2018
Discussion open until: Jun 19, 2018
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