Numerical and centrifuge modelling of coupled heat flow and consolidation around hot cylinders buried in clay / A. M. Britto in Géotechnique, Vol. 39 N°1 (Mars 1989)  

Public ISBD [article]  inGéotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 13 –25 Titre : Numerical and centrifuge modelling of coupled heat flow and consolidation around hot cylinders buried in clay Type de document : texte imprimé Auteurs : A. M. Britto, Auteur ; C. Savvidou, Auteur ; D. V. Maddocks, Auteur Année de publication : 2007 Article en page(s) : pp. 13 –25 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Clays Temperature Finite elements Consolidation Centrifuge modelling Résumé : Britto (1984) presented a finite element formulation to analyse the coupled heat transfer–consolidation problem for a saturated fine-grained elastic soil. The formulation was validated by comparing it with analytical solutions for a soil layer heated on one side and a cylindrical heat source in an infinite medium. This Paper presents the results of the comparison of centrifuge test data and finite element analyses where the soil is treated as either purely elastic or elasto-plastic. In the centrifuge test, model heaters were pulled into clay layers and then heated. The induced temperature and pore pressure were measured until steady state conditions were reached. In the finite element analysis the model heaters were assumed to be in place at the beginning of the analysis. No account was taken of the disturbances caused by the heater being pulled into the soil. The temperatures and pore pressures generated due to the heating in normally consolidated clay were fairly well predicted using the modified Cam clay model of soil behaviour. Agreement was not as good when a Gibson type of elastic model was used. For an over-consolidated sample the pore pressures were under-predicted. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.13 [article] Numerical and centrifuge modelling of coupled heat flow and consolidation around hot cylinders buried in clay [texte imprimé] / A. M. Britto, Auteur ; C. Savvidou, Auteur ; D. V. Maddocks, Auteur . - 2007 . - pp. 13 –25. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 13 –25 Mots-clés : Clays Temperature Finite elements Consolidation Centrifuge modelling Résumé : Britto (1984) presented a finite element formulation to analyse the coupled heat transfer–consolidation problem for a saturated fine-grained elastic soil. The formulation was validated by comparing it with analytical solutions for a soil layer heated on one side and a cylindrical heat source in an infinite medium. This Paper presents the results of the comparison of centrifuge test data and finite element analyses where the soil is treated as either purely elastic or elasto-plastic. In the centrifuge test, model heaters were pulled into clay layers and then heated. The induced temperature and pore pressure were measured until steady state conditions were reached. In the finite element analysis the model heaters were assumed to be in place at the beginning of the analysis. No account was taken of the disturbances caused by the heater being pulled into the soil. The temperatures and pore pressures generated due to the heating in normally consolidated clay were fairly well predicted using the modified Cam clay model of soil behaviour. Agreement was not as good when a Gibson type of elastic model was used. For an over-consolidated sample the pore pressures were under-predicted. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.13

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