Shaft Capacity of Open-Ended Piles in Sand
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 137, Issue 10
Abstract
This paper presents the results from an experimental investigation designed to examine the effect of soil-core development and cyclic loading on the shaft resistance developed by open-ended piles in sand. An instrumented open-ended model pile was installed either by driving or jacking into an artificially-created loose sand deposit in Blessington, Ireland. The tests provided continuous measurements of the soil-core development and the radial effective stresses during installation and subsequent load tests. The equalized radial effective stresses developed at the pile-soil interface were seen to be dependent on the degree of soil displacement (plugging) experienced during installation, the distance from the pile toe, and the number of load cycles experienced by a soil element adjacent to the pile shaft. A new design method for estimating the shaft capacity of piles in sand is proposed and compared with measurements made on prototype field-scale piles.
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Acknowledgments
The authors would like to thank the following:
1.
The first author was partly funded by an RPS-MCOS Scholarship and was a recipient of the Geotechnical Research Award from the Institute of Engineers Ireland (IEI);
2.
Dave McAuley and Martin Carney for performing the CPT tests and in assisting with the pile installation and load testing at the Blessington site;
3.
The Department of Civil, Structural, and Environmental Engineering, Trinity College Dublin, for the use of the TCD CPT truck; and
4.
Roadstone Ltd., for access to the Blessington test site.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 137 • Issue 10 • October 2011
Pages: 903 - 913
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 24, 2009
Accepted: Jan 14, 2011
Published online: Jan 18, 2011
Published in print: Oct 1, 2011
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