Energy Transfer Mechanism in SPT
Publication: Journal of Geotechnical Engineering
Volume 115, Issue 9
Abstract
A closed-form solution for a rigid-plastic soil penetration function is used to qualitatively investigate the energy transmission characteristics of the Standard Penetration test. It is shown that the percentage of the impact energy used to advance the sampler decreases with an increase in blow count, and that for low blow counts several penetration cycles are required to transmit the energy to the sampler. The results obtained are compared with those for an elasto-plastic soil penetration function, assuming an elastic soil compression of 2 mm for all blow counts.
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References
1.
Kovacs, W. D., Salomone, L. A., and Yokel, F. Y. (1981). “Energy measurement in the standard penetration test.” NBS Building Science Series 135, Washington, D.C., Aug.
2.
Palacios, A. (1977). “The theory and measurement of energy transfer during standard penetration test sampling.” Thesis presented to the University of Florida, at Gainesville, Fla., in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
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Timoshenko, S., and Goodier, T. N. (1970). Theory of elasticity, 3rd Ed., McGraw‐Hill Publishing Co., Inc., New York, N.Y., 496 and 499.
4.
Yokel, F. Y. (1982). “Energy transfer in the standard penetration test.” J. Geotech. Engrg. Div., ASCE, 108(9), 1197–1202.
5.
Yokel, F. Y. (1988). “Effect of blow count on energy transfer in SPT.” NBSIR 88‐3765, National Bureau of Standards, Gaithersburg, Md., July.
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Published In
Journal of Geotechnical Engineering
Volume 115 • Issue 9 • September 1989
Pages: 1331 - 1336
Copyright
Copyright © 1989 ASCE.
History
Published online: Sep 1, 1989
Published in print: Sep 1989
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