Empirical Correlation for Estimating Shear-Wave Velocity from Cone Penetration Test Data for Banks Peninsula Loess Soils in Canterbury, New Zealand
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 144, Issue 9
Abstract
Seismic piezocone data obtained from Banks Peninsula loess soil sites in the Port Hills south of Christchurch, New Zealand, are used with multiple linear regression to develop a new Banks Peninsula loess-specific correlation for predicting shear wave velocity () from cone penetration test (CPT) measurements. The need for this new correlation is demonstrated through comparisons with existing models, including a recently developed Christchurch-specific general soils model, with the loess measurements. It is shown that the existing general soil models tend to systematically underpredict the loess , and it is demonstrated that this underprediction is due to fundamental differences in how the properties of loess and general soil types affect both CPT measurements and shear-wave velocity, and that aging effects alone cannot account for the observed differences.
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Acknowledgments
Funding for this work was provided by the Marsden Fund and the Rutherford Discovery Fellowship (RSNZ), the New Zealand Earthquake Commission (EQC), the New Zealand Natural Hazards Research Platform (NHRP), and QuakeCoRE, a New Zealand Tertiary Education Commission–funded center for research excellence. This is QuakeCoRE Publication Number 0197. The authors would also like to acknowledge Greg De Pascale and Fugro Geotechnical NZ for coordinating and providing the Heathcote Valley SCPTu, and the New Zealand Geotechnical Database team for compiling and maintaining this fantastic resource.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Oct 25, 2017
Accepted: Mar 2, 2018
Published online: Jun 18, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 18, 2018
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