Comparing CPT and Liquefaction Triggering Methods
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Abstract
Significant developments have taken place over the past 20 years to evaluate the liquefaction potential of soils using in situ tests. The cone penetration test (CPT) is now commonly used to evaluate liquefaction potential in soils. There have also been significant developments to evaluate liquefaction potential based on in situ shear wave velocity () measurements. Liquefaction methods base on shear wave velocity have the advantage that they are essentially independent of soil characteristics, such as fines content, but often lack the stratigraphic detail obtained using the CPT. Liquefaction methods based on the CPT have the advantage of continuous, repeatable measurements but require corrections based on soil characteristics that can be significant in soils with high fines content. Comparing the most recent -based method with a CPT-based method provides an independent evaluation of the associated corrections applied to the CPT-based method. This paper compares the current -based method with a specific CPT-based method from the literature to evaluate the associated CPT-based corrections. The paper also examines the advantage of using both CPT and measurements (e.g., using the seismic CPT) to evaluate liquefaction potential.
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Acknowledgments
This research could not have been carried out without the support, encouragement and input from John Gregg, Kelly Cabal and other staff at Gregg Drilling and Testing Inc. The author would also like to thank the anonymous reviewers that provide valuable comments and advice.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 141 • Issue 9 • September 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jun 25, 2014
Accepted: Mar 20, 2015
Published online: May 4, 2015
Published in print: Sep 1, 2015
Discussion open until: Oct 4, 2015
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