Characterization of Autocovariance Parameters of Detrended Cone Tip Resistance from a Global CPT Database
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 149, Issue 10
Abstract
This paper compiles a cone penetration test (CPT) database, named Global-CPT/3/1196. It contains three CPT parameters (cone tip resistance, sleeve friction, and porewater pressure) from 1,196 CPT soundings taken at 59 sites worldwide. The spatially variable cone tip resistance corrected for porewater pressure () soundings in the database are analyzed by a uniform procedure to characterize their autocovariance parameters consisting of a coefficient of variation, scale of fluctuation, smoothness, and hole effect. This is the first study that characterizes spatial variability based on a more complete set of three parameters: scale of fluctuation, smoothness, and hole effect. Previous studies were based on a single parameter (scale of fluctuation). The statistics of the autocovariance parameters and their inter-relationships are presented as a function of soil behavior type. These new statistics may be valuable for a future design founded on insufficient site investigation data: they can be used to obtain first-order estimates for the autocovariance parameters based on soil behavior type. Applications include data-driven site characterization and random finite-element analysis.
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Data Availability Statement
The data sets generated in this study are available from the corresponding author on reasonable request. The database Global-CPT/3/1196 can also be downloaded at the ISSMGE (304dB) webpage: http://140.112.12.21/issmge/tc304.htm?=6.
Acknowledgments
The first author would like to thank the Ministry of Science and Technology of Taiwan for its the gracious support (110-2221-E-002-036-MY3). The authors would like to thank Profs. Guojun Cai, Jamshidi Chenari, Louis Ge, Takayuki Shuku, and Giovanna Vessia for the generous sharing of their CPT data sets as well as the members of the TC304 Committee on Engineering Practice of Risk Assessment & Management of the International Society of Soil Mechanics and Geotechnical Engineering for developing Database 304dB (http://140.112.12.21/issmge/Database_2010.htm), which was used in this study and for making it available for scientific inquiry. The authors also would like to thank Dr. Szu-Wei Lee, Mr. Yu-Chi Chang, and Mr. Zhi-Yu Chen for their efforts in collecting the CPT data.
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Information & Authors
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 149 • Issue 10 • October 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jul 25, 2022
Accepted: Apr 26, 2023
Published online: Aug 11, 2023
Published in print: Oct 1, 2023
Discussion open until: Jan 11, 2024
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- Kok-Kwang Phoon, What Geotechnical Engineers Want to Know about Reliability, ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering, 10.1061/AJRUA6.RUENG-1002, 9, 2, (2023).