EVALUATION OF THE UNDRAINED SHEAR STRENGTH OF CHAMPLAIN SEA CLAYS (LEDA CLAY) IN OTTAWA USING CPT
Raymond Haché, Athir Nader, Simon Gudina, Mamadou Fall
In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost ConferenceSession: In Situ Testing and Instrumentation I / Essais in situ et instrumentation I
ABSTRACT: An evaluation of the empirical cone factors, Nkt, which are used to define the undrained shear strength (su) profile of a deposit on the basis of cone penetration test (CPT) has been carried out for eleven Ottawa Leda clay sites. Both CPT and field-vane tests were carried out at each site as part of the evaluation of the Nkt values. The field-vane apparatuses used were friction compensated digital and Nilcon vanes. Nkt values presented in the literature typically range from 10 to 20 with recommended values of 14 to 16 in the cases where site specific information is not available. The Ottawa Leda clay sites investigated mostly produced Nkt values in the range of 8 to 12. The practice of using SPT N-values to estimate the undrained shear strength is also briefly discussed and it is demonstrated to be unsuitable for use within Leda clay deposits.
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Haché, Raymond, Nader, Athir, Gudina, Simon, Fall, Mamadou (2015) EVALUATION OF THE UNDRAINED SHEAR STRENGTH OF CHAMPLAIN SEA CLAYS (LEDA CLAY) IN OTTAWA USING CPT in GEO2015. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Haché_GEO2015_35,
author = {{Haché, Raymond}, {Nader, Athir}, {Gudina, Simon}, {Fall, Mamadou}}
title = {EVALUATION OF THE UNDRAINED SHEAR STRENGTH OF CHAMPLAIN SEA CLAYS (LEDA CLAY) IN OTTAWA USING CPT}
booktitle = {Proceedings of the 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference}
year = {2015}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {EVALUATION OF THE UNDRAINED SHEAR STRENGTH OF CHAMPLAIN SEA CLAYS (LEDA CLAY) IN OTTAWA USING CPT}
booktitle = {Proceedings of the 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference}
year = {2015}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }