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Canadian geotechnical journal. Revue canadienne de gèotechnique, v.55 no.3, 2018년, pp.427 - 436
Tai, Pei (Centre for Geomechanics and Railway Engineering, School of Civil Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong City, NSW 2522, Australia.) , Indraratna, Buddhima , Rujikiatkamjorn, Cholachat
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In this paper, time-dependent clogging is studied considering a unit cell consisting of a single stone column interacting with the surrounding soft clay. Clogging is assessed quantitatively and the corresponding void space of the column is determined using computed tomography. It is observed that th...
Dans cet article, le colmatage dépendant du temps est étudié en tenant compte d’une cellule unitaire constituée d’une seule colonne de pierre interagissant avec l’argile molle environnante. Le colmatage est évalué quantitativement et l’espace vide correspondant de la colonne est déterminé à l’aide de la tomodensitométrie. On constate que l’étendue du colmatage est importante dans la partie supérieure de la colonne, mais diminue rapidement avec la profondeur. Les propriétés du sol dans la zone bouchée sont déterminées indirectement par des essais supplémentaires de mélanges d’argiles et d’agrégats avec diverses fractions d’argile. Un modèle de consolidation de contrainte égale basé sur le principe de l’analyse des cellules unitaires est développé pour capturer à la fois le colmatage initial et temporel. Le modèle explique une réduction de la perméabilité et une augmentation de la compressibilité de la colonne. Ce modèle actuel, comme prévu, offre des résultats identiques à certaines études antérieures si le colmatage est ignoré, tandis que la comparaison avec d’autres modèles sélectionnés démontre l’influence que le colmatage de la colonne de pierre peut avoir sur la consolidation du sol environnant. En outre, les prédictions de l’établissement des charges du modèle proposé de « contrainte égale » sont également comparées à la réponse de consolidation d’un modèle de « contrainte libre » développé précédemment. [Traduit par la Rédaction]
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