Pile-Soil Interaction in Expansive Soil Foundation: Analytical Solution and Numerical Simulation
Publication: International Journal of Geomechanics
Volume 11, Issue 3
Abstract
Pile-soil interaction in an expansive soil foundation has been primarily analyzed by an analytical solution in our previous study. As a complementary work, this paper briefly reviews the derivation process in more detail and extends the capability of the solution in dealing with the pile-soil interaction issue under various conditions. The results show that (1) increasing pile length is able to effectively decrease the upward pile movements, but meanwhile, the tensile stresses along the pile shaft increase as well; (2) a critical pile diameter exists (); (3) when the diameter is less than this value, the upward pile movements can be reasonably reduced, but for the pile with a larger diameter, it has little effect on reducing the upward pile movements, and as irrigation proceeds, both the displacements and tensile stresses increase and both tend to be much less sensitive to the water’s incoming over time; and (4) a critical applied pressure for preventing the upward pile movements that is induced by soil’s swelling pressure is found to be 2.5 times of the maximum tensile stress of the free pile only under swelling pressure in expansive soil foundation.
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Acknowledgments
The authors would like to acknowledge the National Natural Science Foundation of China (project number NSFC50978097).
References
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Information
Published In
International Journal of Geomechanics
Volume 11 • Issue 3 • June 2011
Pages: 159 - 166
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Oct 30, 2009
Accepted: Sep 21, 2010
Published online: May 16, 2011
Published in print: Jun 1, 2011
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