TECHNICAL NOTES
Mar 14, 2003

Physical Properties of Plywood and Waferboard as Pile Cushion Materials

Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 129, Issue 4

Abstract

The use of wave equation software (e.g., GRLWEAP) to determine driving stresses of piles requires the input of pile cushion thickness and elastic modulus. Up to this point in time, the values of pile cushion thickness and elastic modulus after a number of blows have been assumed and input into the program for an “end of drive” analysis. Based on the results of this laboratory study, two graphs and an equation have been developed that can be used to determine the thickness and elastic modulus, after a number of blows, for plywood and waferboard pile cushions.

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References

Equipment Applications Committee. (1986). “Standard testing method for deflection characteristics of pile driving cushion material.” Deep Foundations Institute, Sparta, N.J.
Nichols, J. (1985). “Change in Young’s modulus of plywood under cyclic loading.” Report, Univ. of Colorado, Denver.
Whitaker, A. (2001). “Plywood and waferboard as pile cushion materials.” MS thesis, Utah State Univ. Logan, Utah.

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Information

Published In

Go to Journal of Geotechnical and Geoenvironmental Engineering
Journal of Geotechnical and Geoenvironmental Engineering
Volume 129Issue 4April 2003
Pages: 379 - 382

History

Received: Aug 21, 2001
Accepted: Sep 13, 2002
Published online: Mar 14, 2003
Published in print: Apr 2003

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Authors

Affiliations

Kevin C. Womack, M.ASCE
Professor, Dept. of Civil and Environmental Engineering, Utah State Univ., Logan, UT, 84322-4110.
Aaron M. Whitaker 
Engineer, Thiokol Corporation, P.O. Box 707, M/S 650, Brigham City, UT, 84302-0707.
Joseph A. Caliendo, M.ASCE
Associate Professor, Dept. of Civil and Environmental Engineering, Utah State Univ., Logan, UT, 84322-4110.
George G. Goble, M.ASCE
Consulting Engineer, George Goble Consulting Engineer, LLC, 5398 Manhattan Circle, Suite 100, Boulder, CO 80303.
Marvin W. Halling, M.ASCE
Associate Professor, Dept. of Civil and Environmental Engineering, Utah State Univ., Logan, UT, 84322-4110.

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