Characterization of in-situ effective stress profiles in clays based on piezo-cone penetration test (CPTU) results

J. Lee, D. Park, D. Kyung, D. Park, I. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effective stress is an important state soil variable that controls the mechanical behavior of soils. The depth profile of in-situ effective stress is usually determined using soil unit weights obtained from undisturbed soil samples collected at different depths. The undisturbed soil sampling is subjected to various uncertainties, which becomes more pronounced as target depth increases or offshore condition is involved. The piezo-cone penetration test (CPTU) has been widely used for characterizing in-situ soil conditions. While a variety of CPTU-based methods have been proposed for various geotechnical purposes, less attention has been given to the direct assessment of in-situ effective stress. In the present study, a CPTU-based methodology for profiling in-situ stresses in clayey soils is presented.Acorrelation model between the effective stress and the cone penetration resistances is introduced assuming that there is a unique correlation between the cone resistance, effective stress and undrained shear strength. Field considerations for profiling in-situ stresses from CPTU results are presented. Case examples are selected from the literature and adopted to check the validity of the CPTU-based method.

Original languageEnglish
Title of host publicationFrontiers in Offshore Geotechnics III - 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015
EditorsVaughan Meyer
PublisherCRC Press/Balkema
Pages1079-1084
Number of pages6
ISBN (Electronic)9781138028487
Publication statusPublished - 2015 Jan 1
EventProceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015 - Oslo, Norway
Duration: 2015 Jun 102015 Jun 12

Publication series

NameFrontiers in Offshore Geotechnics III - 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015

Other

OtherProceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015
CountryNorway
CityOslo
Period15/6/1015/6/12

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All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

Cite this

Lee, J., Park, D., Kyung, D., Park, D., & Kim, I. (2015). Characterization of in-situ effective stress profiles in clays based on piezo-cone penetration test (CPTU) results. In V. Meyer (Ed.), Frontiers in Offshore Geotechnics III - 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015 (pp. 1079-1084). (Frontiers in Offshore Geotechnics III - 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015). CRC Press/Balkema.