Pile Setup in Cohesive Soil. I: Experimental Investigation
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Volume 139, Issue 2
Abstract
Pile setup in cohesive soils has been a known phenomenon for several decades. However, a systematic field investigation to provide the needed data to develop analytical procedures and integrate pile setup into the design method rarely exists. This paper summarizes a recently completed field investigation on five fully instrumented steel H-piles embedded in cohesive soils, while a companion paper discusses the development of the pile setup method. During the field investigation, detailed soil characterization, monitoring of soil total lateral stress and pore-water pressure, collection of pile dynamic restrike data as a function of time, and vertical static load tests were completed. Restrike measurements confirm that pile setup occurs at a logarithmic rate following the end of driving, and its development correlates well with the rate of dissipation of the measured pore-water pressure. Based on the field data collected, it was concluded that the skin friction component, not the end bearing, contributes predominantly to the setup, which can be accurately estimated for practical purposes using soil properties, such as coefficient of consolidation, undrained shear strength, and the standard penetration test -value.
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Acknowledgments
We express our gratitude to the Iowa Highway Research Board for sponsoring this project and the members of the project’s technical advisory committee for their guidance and advice: Ahmad Abu-Hawash, Dean Bierwagen, Lyle Brehm, Ken Dunker, Kyle Frame, Steve Megivern, Curtis Monk, Michael Nop, Gary Novey, John Rasmussen, and Bob Stanley. We would also like to thank various bridge and soil contractors for their contributions to the field tests.
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 139 • Issue 2 • February 2013
Pages: 199 - 209
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jun 16, 2011
Accepted: Apr 23, 2012
Published online: Apr 25, 2012
Published in print: Feb 1, 2013
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