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Numerical simulation of pressure-controlled cavity expansion process in clay at constant volumetric expansion rate / A.T. Yeung in Géotechnique, Vol. 62 N° 4 (Avril 2012) 

Public ISBD [article]  in Géotechnique > Vol. 62 N° 4 (Avril 2012) . - pp. 353–357 Titre : Numerical simulation of pressure-controlled cavity expansion process in clay at constant volumetric expansion rate Type de document : texte imprimé Auteurs : A.T. Yeung, Auteur ; S. K. A. Au, Auteur ; T.H. Lam, Auteur Année de publication : 2012 Article en page(s) : pp. 353–357 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Clays  Compaction  Grouting  Laboratory  tests  Numerical  modelling  Pore  pressures Résumé : The cavity expansion theory is being applied to describe many geotechnical engineering processes. Many of these processes are controlled by the cavity volumetric expansion rate in practice. As soil is not an elastic material, the injection pressure is a non-linear function of the cavity volume, rendering it very difficult to produce the appropriate time history of injection pressure so that the controlled cavity volumetric expansion rate can be simulated. In this technical note, an algorithm to develop the time history of injection pressure using appropriate soil properties to generate the required cavity volumetric expansion rate in clay is presented. The simulation and experimental results of a series of laboratory-scale compaction grouting experiments are presented as an example to demonstrate the validity of the approach. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/issue/geot/62/4# [article] Numerical simulation of pressure-controlled cavity expansion process in clay at constant volumetric expansion rate [texte imprimé] / A.T. Yeung, Auteur ; S. K. A. Au, Auteur ; T.H. Lam, Auteur . - 2012 . - pp. 353–357. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 62 N° 4 (Avril 2012) . - pp. 353–357 Mots-clés : Clays  Compaction  Grouting  Laboratory  tests  Numerical  modelling  Pore  pressures Résumé : The cavity expansion theory is being applied to describe many geotechnical engineering processes. Many of these processes are controlled by the cavity volumetric expansion rate in practice. As soil is not an elastic material, the injection pressure is a non-linear function of the cavity volume, rendering it very difficult to produce the appropriate time history of injection pressure so that the controlled cavity volumetric expansion rate can be simulated. In this technical note, an algorithm to develop the time history of injection pressure using appropriate soil properties to generate the required cavity volumetric expansion rate in clay is presented. The simulation and experimental results of a series of laboratory-scale compaction grouting experiments are presented as an example to demonstrate the validity of the approach. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/issue/geot/62/4#