Influence of Penetration Rate on Penetrometer Resistance
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 137, Issue 7
Abstract
Penetration resistance in fine-grained soils varies with the rate of penetration. Considering undrained behavior as a reference, as the rate of penetration is reduced, soil resistance increases because of the effects of partial consolidation and soil strengthening immediately ahead of the probe. Many penetration tests have been performed under different rates of penetration to identify the range of drainage characteristics of the soils used, correlating these conditions with laboratory interpretations and in situ tests. A backbone curve relates the variation of the normalized point resistance with the normalized rate of penetration. This work presents an analytical approach to the backbone curve equation used to fit test data. In addition, this paper presents a set of centrifuge tests with variable penetration rates performed with a soil classified as silty tailings, which has different geotechnical behavior from most of the soils used by previous researchers.
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Acknowledgments
The authors gratefully acknowledge CENPES/PETROBRAS for the financial support of this research. The authors are also indebted to Daviely Rodrigues from Samarco Mineração S. A. and Professor Terezinha Espósito from the Federal University of Minas Gerais for their support and interest in this study. The authors would also like to acknowledge Martin Fahey of the University of Western Australia and Khader Rammah for their review and comments on this paper.
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© 2011 American Society of Civil Engineers.
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Received: Jan 28, 2010
Accepted: Oct 27, 2010
Published online: Nov 4, 2010
Published in print: Jul 1, 2011
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