A new method based on spherical cavity expansion theory is used to interrelate data from piezocone penetration tests (CPTUs) and flat plate dilatometer tests (DMTs) in soft to firm clays. Data from 27 clay sites are shown to confirm simple links that express the CPTU net resistance and excess porewater pressure in terms of th e DMT contact pressure and expansion pressure. As a result, the derived nexus is explored to predict the effective friction angle of soft to firm clays from DMT data using an existing CPTU limit plasticity solution. Two well-documented case studies are presented to illustrate the reasonable prediction of the effective friction angle in comparison with laboratory anisotropically consolidated undrained compression triaxial test results on undisturbed samples.
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Research Article|
November 29 2016
Effective friction angle of soft to firm clays from flat dilatometer Available to Purchase
Zhongkun Ouyang, MS;
Zhongkun Ouyang, MS
Research Assistant
Geosystems Engineering, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA (corresponding author: zouyang6@gatech.edu)
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Paul W. Mayne, PhD, PE
Paul W. Mayne, PhD, PE
Professor
Geosystems Engineering, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA
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Publisher: Emerald Publishing
Received:
May 11 2016
Accepted:
October 31 2016
Online ISSN: 1751-8563
Print ISSN: 1353-2618
ICE Publishing: All rights reserved
2016
Proceedings of the Institution of Civil Engineers - Geotechnical Engineering (2017) 170 (2): 137–147.
Article history
Received:
May 11 2016
Accepted:
October 31 2016
Citation
Ouyang Z, Mayne PW (2017), "Effective friction angle of soft to firm clays from flat dilatometer". Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, Vol. 170 No. 2 pp. 137–147, doi: https://doi.org/10.1680/jgeen.16.00073
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