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Characteristic Shear Strength Parameters Derived from Cone Penetration Test
Erdi Myftaraga1 and Olsi Koreta2
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DOI:10.17265/1934-7359/2025.03.005
1. Department of Human and Applied Sciences, Faculty of Architecture and Design, Polis University, Bylis 12, Kashar 1051/2995, Tirana, Albania
2. Department of Advanced Geotechnical Design, GEO-Danish Geotechnical Institute, Maglebgvej 1, DK 2800, Lyngby, Denmark
The interpretation and application of CPT (cone penetration test) results is characterized by considerable variability of data, either in measured or correlated parameters. According to the requirements of Eurocode 7 the existing variability in soil properties has to be taken into account statistically during the determination of the characteristic values of each parameter. This should be done by selecting a cautious estimate of the value affecting the limit state. Obtaining the characteristic values of CPT measurements is not an easy task and on this aspect nor clear neither unified guidelines exist. This paper focuses in several approaches to characterize the cone resistance and the sleeve friction using simple statistical analysis, in order for these parameters to be applicable in design. Similar procedures are then applied to determine the characteristic values of correlated parameters from CPT such as the effective friction angle for sands and the undrained shear strength for clays. The resulting characteristic values of the considered parameters emphasize the fact that the prediction and the interpretation of characteristic values of soil properties is a complicated and biased procedure.
Eurocode 7, CPTu (piezocone test), characteristic value, friction angle, undrained shear strength.
Journal of Civil Engineering and Architecture 19 (2025) 148-156
doi: 10.17265/1934-7359/2025.03.005
[1] Robertson, P. K., and Cabal, K. L. 2010. Guide to Cone Penetration Testing (4th ed.). California, USA: Gregg Drilling & Testing, Inc.
[2] Campanella, R. G., Wickremesinghe, D. S., and Robertson, P. K. 1987. “Statistical Treatment of Cone Penetration Test Data.” In Proceedings 5th Int. Conference on Applications of Probability and Statistics in Soil and Structural Engineering, September 7-9, 2012, St. Petersburg, Russia, pp. 1011-20.
[3] Fellenius, B. H., and Eslami, A. 2000. “Soil Profile Interpreted from CPTu Data.” In Proceedings of Geotechnical Engineering Conference, November 27-30, 2000, Asian Institute of Technology, Bangkok, Thailand, p. 18.
[4] Pohl, C. 2011. “Determination of Characteristic Soil Values by Statistical Methods.” In Proceedings of Third Int. Symposium on Geotechnical Safety and Risk, June 2 and 3, 2011, Munich, Germany, pp. 427-34.
[5] Bond, A. J., and Harris, A. J. 2008. Decoding Eurocode 7. London, UK: Taylor and Francis.
[6] Orr, T. L. L., Bond, A. J., and Scarpelli, G. 2011. “Findings from the 2nd set of Eurocode 7 Design Examples.” In Proceedings of Third Int. Symp. on Geotechnical Safety and Risk, June 2 and 3, 2011, Munich, Germany, pp. 537-47.
[7] EN 1990. 2002. Eurocode—Basis of Structural Design. Brussels: European Commission.
[8] EN 1997-1. 1997. Eurocode 7: Geotehnical Design—Part 1: General Rules. Brussels: European Commission.
[9] Schneider, H. R., and Fitze, P. 2011. “Characteristic Shear Strength Values for EC7: Guidelines Based on a Statistical Framework.” In Proceedings of the 15th European Conference on Soil Mechanics and Geotechnical Engineering. Tepper Drive Clifton: IOS Press.
[10] Marques, S. H., Gomes, A. T., and Henriques, A. A. 2011. “Reliability Assessment of Eurocode 7 Retaining Structures Design Methodology.” In Proceedings of Third Int. Symp. on Geotechnical Safety and Risk, June 2 and 3, 2011, Munich, Germany, pp. 455-62.
[11] Bond, A. J. 2011. “A Procedure for Determining the Characteristic Value of a Geotechnical Parameter.” In Proceedings of Third Int. Symp. on Geotechnical Safety and Risk, June 2 and 3, 2011, Munich, Germany, pp. 419-26.
[12] National Cooperative Highway Research Program (NCHRP) Synthesis 368. 2007. Cone Penetration Testing: A Synthesis of Highway Practice. Washington D.C., USA: Transportation Research Board.
[13] Robertson, P. K. 2009. “Interpretation of Cone Penetration Test—A Unified Approach.” Canadian Geotechnical Journal 46: 1337-55.
[14] Das, B. M. 2007. Principles of Foundation Engineering (6th ed.). Ontario, Canada: Thomson Canada Limited, Toronto.