Research Article
Aug 1979
Energy Dynamics of SPT
Publication: Journal of the Geotechnical Engineering Division
Volume 105, Issue 8
Abstract
The writers report on the dynamics of the standard penetration test (SPT) as determined from a study involving hammer impact and wave mechanics theory, field measurements of dynamic behavior during SPT, and computer simulations using the wave equation as developed for computer studies of pile driving. The field data match well with the theory presented and the simulations provided further insight into the details of SPT sampler penetration. The work includes methods for determining the amount of hammer enery reaching the sampler, and for determining the energy lost to the sampler. The writers conclude that blow count varies inversely with the wave energy reaching the sampler, and that the SPT represents a form of in situ, undrained, cyclic load test and offers a method for site-specific determinations of the J damping coefficients in wave equation analyses of pile driving.
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Published In
Journal of the Geotechnical Engineering Division
Volume 105 • Issue 8 • August 1979
Pages: 909 - 926
Copyright
© 1979 American Society of Civil Engineers.
History
Published in print: Aug 1979
Published online: Feb 11, 2021
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Authors
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John H. Schmertmann, F.ASCE
Principal; Schmertmann & Crapps, Inc.; also, Prof. of Civ. Engrg., Univ. of Florida, Gainesville, Fla
Alejandro Palacios, M.ASCE
Consulting Engr., CESCO, Cali, Colombia
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.