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The pressure distribution along stone columns in soft clay under consolidation and foundation loading / V. Sivakumar in Géotechnique, Vol. 61 N° 7 (Juillet 2011) 

Public ISBD [article]  in Géotechnique > Vol. 61 N° 7 (Juillet 2011) . - pp. 613–620 Titre : The pressure distribution along stone columns in soft clay under consolidation and foundation loading Type de document : texte imprimé Auteurs : V. Sivakumar, Auteur ; D. K. N. M. Jeludine, Auteur ; A. Bell, Auteur Année de publication : 2011 Article en page(s) : pp. 613–620 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Settlement  Model  tests  Reinforced  soils  Ground  improvement  Footings/Foundations  Soil/Structure  interaction Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The mechanism whereby foundation loading is transmitted through the column has received little attention from researchers. This paper reports on some interesting findings obtained from a laboratory-based model study in respect of this issue. The model tests were carried out on samples of soft clay, 300 mm in diameter and 400 mm high. The samples were reinforced with fully penetrating stone columns, of three different diameters, made of crushed basalt. Four pressure cells were located along each stone column. The 60 mm diameter footing used in the model was supported on a clay bed reinforced with a stone column and subjected to foundation loading under drained conditions. The results show that the dissipation of excess pore water pressure developed during the initial application of total stresses, when the foundation was subjected to no loading, generated considerable stresses within the column, and that this was directly attributable to the development of negative skin friction. The pressure distributions in the column during foundation loading showed some complex behaviour. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.p.086 [article] The pressure distribution along stone columns in soft clay under consolidation and foundation loading [texte imprimé] / V. Sivakumar, Auteur ; D. K. N. M. Jeludine, Auteur ; A. Bell, Auteur . - 2011 . - pp. 613–620. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 61 N° 7 (Juillet 2011) . - pp. 613–620 Mots-clés : Settlement  Model  tests  Reinforced  soils  Ground  improvement  Footings/Foundations  Soil/Structure  interaction Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The mechanism whereby foundation loading is transmitted through the column has received little attention from researchers. This paper reports on some interesting findings obtained from a laboratory-based model study in respect of this issue. The model tests were carried out on samples of soft clay, 300 mm in diameter and 400 mm high. The samples were reinforced with fully penetrating stone columns, of three different diameters, made of crushed basalt. Four pressure cells were located along each stone column. The 60 mm diameter footing used in the model was supported on a clay bed reinforced with a stone column and subjected to foundation loading under drained conditions. The results show that the dissipation of excess pore water pressure developed during the initial application of total stresses, when the foundation was subjected to no loading, generated considerable stresses within the column, and that this was directly attributable to the development of negative skin friction. The pressure distributions in the column during foundation loading showed some complex behaviour. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.9.p.086