Research Article
Apr 1982
SPT Hammer Energy Measurement
Publication: Journal of the Geotechnical Engineering Division
Volume 108, Issue 4
Abstract
A field measurement system and procedure which measures the energy delivered by a drill rig system was developed and successfully used to study the factors which affect delivered energy. Results are presented which indicate that the energy delivered by certain drill rig systems varies widely in engineering practice. The energy delivered to the drill stem varied with the number of turns of rope around the cathead, the fall height, drill rig type hammer type, and operator characteristics. The type of hammer had a strong influence on the energy transfer mechanism between the anvil and the drill stem. It appears that the safety (sleeve enclosed) hammer is more efficient in transmitting the available kinetic energy through the anvil to the drill stem than the donut hammer.
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Published In
Journal of the Geotechnical Engineering Division
Volume 108 • Issue 4 • April 1982
Pages: 599 - 620
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Apr 1982
Published online: Feb 11, 2021
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William D. Kovacs, M.ASCE
Research Geotechnical Engr., National Bureau of Standards, Geotechnical Engrg. Grp., Washington, D.C. 20234
Lawrence A. Salomone, M.ASCE
Research Geotechnical Engr., National Bureau of Standards, Geotechnical Engrg. Grp., Washington, D.C. 20234
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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.