Estimation of Undrained Shear Strength of Soil from CPTu Data
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The estimation of undrained shear strength ( ) from Cone Penetration Test with pore pressure measurement (CPTu) for two sites was investigated in this research. The CPTu cone parameters: net cone resistance ( ), excess pore pressure ( ) and effective cone resistance ( ) were used to estimate the for the two sites and the values obtained were compared with the undrained shear strength in triaxial compression ( calculated from Anisotropically Consolidated Undrained Compression (CAUC) triaxial test results. For the clayey silt site, the undrained shear strength from the CAUC tests are higher compared to the values obtained from the CPTu, and the highest correlation was obtained from the effective cone resistance parameter . For the quick clay test site, the value and were relatively the same and showed stronger correlation as compared to the clayey silt site. The measured from the cone parameter had the highest correlation. It was concluded that and yields good correlation with the CAUC results for the clayey silt and quick clay test sites respectively as compared to the other con parameters.
Blaker, Ø., 2020. Characterization of a Natural Clayey Silt and the Effects of Sample Disturbance on Soil Behavior and Engineering Properties. Doctoral Dissertations. 1904
Blaker, Ø., Carroll, R., Paniagua Lopez, A. P., DeGroot, D. J., & L Heureux, J.-S. 2019. Halden research site: geotechnical characterization of a post glacial silt, AIMS Geosciences, 5(2), 184-234.
Bol, E., Önalp, A., Özocak, A. and Sert, S., 2019. Estimation of the undrained shear strength of Adapazari fine grained soils by cone penetration test. Engineering Geology, 261, p.105277.
Doherty, J.P., Gourvenec, S., Gaone, F.M., Pineda, J.A., Kelly, R., O'Loughlin, C.D., Cassidy, M.J. and Sloan, S.W., 2018. A novel web-based application for storing, managing and sharing geotechnical data, illustrated using the national soft soil field testing facility in Ballina, Australia. Computers and Geotechnics, 93, pp.3-8.
Hong, S.J., Lee, M., Kim, J. and Lee, W., 2010. Evaluation of undrained shear strength of Busan clay using CPT. In Proceedings of the 2nd International Symposium on Cone Penetration Testing, CPT (Vol. 10).
Karlsrud, K., Lunne, T., Kort, D.A. and Strandvik, S., 2005. CPTU correlations for clays. In Proceedings of the 16th international conference on soil mechanics and geotechnical engineering (pp. 693-702). IOS Press.
Kim, C., Kim, S. and Lee, J., 2009. Estimating clay undrained shear strength using CPTu results. Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, 162(2), pp.119-127.
L’Heureux, J.S., Lindgård, A., and Emdal, A. 2019. The Tiller--Flotten research site: Geotechnical characterization of a very sensitive clay deposit, AIMS Geosciences, 5(4), 831-867.
L'Heureux, J.S., Lunne, T., Lacasse, S., Carroll, R., Strandvik, S.O., Instanes, A., Sinitsyn, A., Degago, S.A. and Nordal, S., 2017. Norway's national geotest site research infrastructure (NGTS). In Unearth the Future, Connect beyond. Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering.
Lunne, T., Robertson, P.K., and Powell, J.J.M., 1997. Cone penetration testing in geotechnical practice. Blackie Academic and Professional, Chapman and Hall New York.
Lunne, T., Randolph, M.F., Chung, S.F., Andersen, K.H. and Sjursen, M., 2005. Comparison of cone and T-bar factors in two onshore and one offshore clay sediments. Frontiers in Offshore Geotechnics, pp.981-989.
Mayne, P.W., Coop, M.R., Springman, S.M., Huang, A.B. and Zornberg, J.G., 2009. Geomaterial behavior and testing. In Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering (Volumes 1, 2, 3 and 4) (pp. 2777-2872). IOS Press.
Mayne, P.W., Paniagua, P., L’heureux, J.S., Lindgård, A. and Emdal, A., 2019. Analytical CPTu model for sensitive clay at Tiller-Flotten site, Norway. Proc. XVII ECSMGE: Geotechnical Engineering Foundation of the Future.
Mayne, P.W. and Peuchen, J., 2018. Evaluation of CPTU Nkt cone factor for undrained strength of clays. Cone Penetration Testing, pp.423-429.
Narainsamy, Y. and Jacobsz, S.W., 2022. A review of methods for estimating undrained brittleness index from the CPT. Cone Penetration Testing 2022, pp.604-609.
Rémai, Z. 2013. Correlation of undrained shear strength and CPT resistance. Periodica Polytechnica Civil Engineering, 57(1):39-44.
Robertson, P.K. and Wride, C.E., 1998. Evaluating cyclic liquefaction potential using the cone penetration test. Canadian geotechnical journal, 35(3), pp.442-459.
Robertson, P.K., 2010, May. Soil behaviour type from the CPT: an update. In 2nd International symposium on cone penetration testing (Vol. 2, No. 56, p. 8). Huntington Beach: Cone Penetration Testing Organizing Committee.
Robertson, P.K., 2012, September. The James K. Mitchell Lecture: Interpretation of in-situ tests–some insights. In Proc. 4th Int. Conf. on Geotechnical and Geophysical Site Characterization–ISC (Vol. 4, pp. 3-24).
Wang, B., Brooks, G.R. and Hunter, J.A.M., 2015. Geotechnical investigations of a large landslide site at Quyon, Québec. In 68th Can Geotech Conf.
