Identifying parameters controlling soil delayed behaviour from laboratory and in situ pressuremeter testing
Identifieur interne : 000C23 ( Main/Exploration ); précédent : 000C22; suivant : 000C24Identifying parameters controlling soil delayed behaviour from laboratory and in situ pressuremeter testing
Auteurs : Zhen U Yin [France] ; Pierre Ves Hicher [France]Source :
- International Journal for Numerical and Analytical Methods in Geomechanics [ 0363-9061 ] ; 2008-08-25.
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Abstract
The aim of this paper is to present a methodology for identifying the soil parameters controlling the delayed behaviour from laboratory and in situ pressuremeter tests by using an elasto‐viscoplastic model (EVP‐MCC) based on Perzyna's overstress theory and on the elasto‐plastic Modified Cam Clay model. The influence of both the model parameters and the soil permeability was studied under the loading condition of pressuremeter tests by coupling the proposed model equations with Biot's consolidation theory. On the basis of the parametric study, a methodology for identifying model parameters and soil permeability by inverse analysis from three levels of constant strain rate pressuremeter tests was then proposed and applied on tests performed on natural Saint‐Herblain clay. The methodology was validated by comparing the optimized values of soil parameters and the values of the same parameters obtained from laboratory test results, and also by using the identified parameters to simulate other tests on the same samples. The analysis of the drainage condition and the strain rate effect during a pressuremeter test demonstrated the coupled influence of consolidation and viscous effects on the test results. The numerical results also showed that the inverse analysis procedure could successfully determine the parameters controlling the time‐dependent soil behaviour. Copyright © 2008 John Wiley & Sons, Ltd.
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DOI: 10.1002/nag.684
Affiliations:
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J. Numer. Anal. Meth. Geomech.</title><idno type="ISSN">0363-9061</idno><idno type="eISSN">1096-9853</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="2008-08-25">2008-08-25</date><biblScope unit="volume">32</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="1515">1515</biblScope><biblScope unit="page" to="1535">1535</biblScope></imprint><idno type="ISSN">0363-9061</idno></series><idno type="istex">102FA31434F9B5E8E63AE5CF763086453F06FBB3</idno><idno type="DOI">10.1002/nag.684</idno><idno type="ArticleID">NAG684</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0363-9061</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Modified Cam Clay</term><term>consolidation</term><term>parameter identification</term><term>pressuremeter test</term><term>soft clay</term><term>viscoplasticity</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The aim of this paper is to present a methodology for identifying the soil parameters controlling the delayed behaviour from laboratory and in situ pressuremeter tests by using an elasto‐viscoplastic model (EVP‐MCC) based on Perzyna's overstress theory and on the elasto‐plastic Modified Cam Clay model. The influence of both the model parameters and the soil permeability was studied under the loading condition of pressuremeter tests by coupling the proposed model equations with Biot's consolidation theory. On the basis of the parametric study, a methodology for identifying model parameters and soil permeability by inverse analysis from three levels of constant strain rate pressuremeter tests was then proposed and applied on tests performed on natural Saint‐Herblain clay. The methodology was validated by comparing the optimized values of soil parameters and the values of the same parameters obtained from laboratory test results, and also by using the identified parameters to simulate other tests on the same samples. The analysis of the drainage condition and the strain rate effect during a pressuremeter test demonstrated the coupled influence of consolidation and viscous effects on the test results. The numerical results also showed that the inverse analysis procedure could successfully determine the parameters controlling the time‐dependent soil behaviour. Copyright © 2008 John Wiley & Sons, Ltd.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Pays de la Loire</li></region><settlement><li>Nantes</li></settlement></list><tree><country name="France"><region name="Pays de la Loire"><name sortKey="Yin, Zhen U" sort="Yin, Zhen U" uniqKey="Yin Z" first="Zhen U" last="Yin">Zhen U Yin</name></region><name sortKey="Hicher, Pierre Ves" sort="Hicher, Pierre Ves" uniqKey="Hicher P" first="Pierre Ves" last="Hicher">Pierre Ves Hicher</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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