Consolidation and creep of soils in plane-strain conditions / L. Suklje in Géotechnique, Vol. 39 N°2 (Juin 1989)  

Public ISBD [article]  inGéotechnique > Vol. 39 N°2 (Juin 1989) . - pp. 231 –250 Titre : Consolidation and creep of soils in plane-strain conditions Type de document : texte imprimé Auteurs : L. Suklje, Auteur ; B. Majes, Auteur Année de publication : 2007 Article en page(s) : pp. 231 –250 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Consolidation Finite elements Constitutive relations Settlement Time dependence Pore pressures Résumé : Rheological relationships expressed by families of strain isotaches have been introduced into the combined system of equilibrium and diffusion equations so that at any time of the consolidation the strain speeds correspond to strain isotaches. The plane-strain earth bodies are discretized by the network of triangular finite elements with 12 degrees of freedom. When, in the late phase of the primary consolidation, the excess pore pressures approach zero, the procedure ceases to give reliable results. Further development of displacements can be computed on the assumption that the secondary consolidation occurs at constant effective stress state. The corresponding computer program has been applied to geological, drainage and boundary conditions of a test embankment built on very soft marshy soils. The results have been compared with field measurements of pore pressures and displacements. The comparison has proved that the applied joint solution offers an adequate tool for predicting the behaviour of non-linear viscous soils loaded by road embankments. In soils that exhibit effects of the previous secondary consolidation, the initial creep speed influences the forecast of settlements and of excess pore pressure dissipation. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.2.231 [article] Consolidation and creep of soils in plane-strain conditions [texte imprimé] / L. Suklje, Auteur ; B. Majes, Auteur . - 2007 . - pp. 231 –250. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°2 (Juin 1989) . - pp. 231 –250 Mots-clés : Consolidation Finite elements Constitutive relations Settlement Time dependence Pore pressures Résumé : Rheological relationships expressed by families of strain isotaches have been introduced into the combined system of equilibrium and diffusion equations so that at any time of the consolidation the strain speeds correspond to strain isotaches. The plane-strain earth bodies are discretized by the network of triangular finite elements with 12 degrees of freedom. When, in the late phase of the primary consolidation, the excess pore pressures approach zero, the procedure ceases to give reliable results. Further development of displacements can be computed on the assumption that the secondary consolidation occurs at constant effective stress state. The corresponding computer program has been applied to geological, drainage and boundary conditions of a test embankment built on very soft marshy soils. The results have been compared with field measurements of pore pressures and displacements. The comparison has proved that the applied joint solution offers an adequate tool for predicting the behaviour of non-linear viscous soils loaded by road embankments. In soils that exhibit effects of the previous secondary consolidation, the initial creep speed influences the forecast of settlements and of excess pore pressure dissipation. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.2.231

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