Estimating clay undrained shear strength using CPTu results

C. Kim, S. Kim, J. Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Estimation of the undrained shear strength su of clays using piezocone penetration test (CPTu) results has been based mainly on the cone factor Nk. In this study a new CPTu-based method for estimating su is proposed and evaluated. It is aimed at reducing uncertainties in the estimation of su and enhancing the application of CPTu results. To develop the method, a selected site on a marine clay deposit was subjected to an extensive experimental testing programme. The proposed method defines a direct correlation between su and the cone resistance qt, involving the initial in situ pore pressure but excluding the need for overburden pressure calculation and therefore the need for undisturbed soil sampling. To verify the proposed method, additional test sites and example sites from the literature that encompass a variety of soil conditions are selected and examined. Values of su obtained from the proposed method are in good agreement with measured values of su for all the selected verification cases.

Original languageEnglish
Pages (from-to)119-127
Number of pages9
JournalProceedings of the Institution of Civil Engineers: Geotechnical Engineering
Volume162
Issue number2
DOIs
Publication statusPublished - 2009 Aug 5

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Shear strength
shear strength
Cones
Clay
Clay deposits
Soils
clay
Pore pressure
Sampling
Testing
penetration test
overburden
pore pressure
method
sampling
soil
Uncertainty
need

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

Cite this

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abstract = "Estimation of the undrained shear strength su of clays using piezocone penetration test (CPTu) results has been based mainly on the cone factor Nk. In this study a new CPTu-based method for estimating su is proposed and evaluated. It is aimed at reducing uncertainties in the estimation of su and enhancing the application of CPTu results. To develop the method, a selected site on a marine clay deposit was subjected to an extensive experimental testing programme. The proposed method defines a direct correlation between su and the cone resistance qt, involving the initial in situ pore pressure but excluding the need for overburden pressure calculation and therefore the need for undisturbed soil sampling. To verify the proposed method, additional test sites and example sites from the literature that encompass a variety of soil conditions are selected and examined. Values of su obtained from the proposed method are in good agreement with measured values of su for all the selected verification cases.",
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Estimating clay undrained shear strength using CPTu results. / Kim, C.; Kim, S.; Lee, J.

In: Proceedings of the Institution of Civil Engineers: Geotechnical Engineering, Vol. 162, No. 2, 05.08.2009, p. 119-127.

Research output: Contribution to journalArticle

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