Load transfer mechanism in geosynthetic reinforced pile-supported embankments: Three dimensional numerical modelling

Priyanath Ariyarathne, D. S. Liyanapathirana, C.J. Leo

In the proceedings of: GeoManitoba 2012: 65th Canadian Geotechnical Conference

Session: T1D - Retaining Walls / MSE Walls

ABSTRACT: Due to the rapid growth of world population and lack of suitable land for construction, embankments are widely constructed on soft soil deposits at present. However, there are many problems associated with constructing embankments over soft soils, such as large settlements over a long period of time due to consolidation of foundation soil and instability of the embankment as a result of undesirable characteristics of soft soil such as high compressibility, insufficient shear strength and low bearing capacity. Geosynthetic reinforced pile-supported (GRPS) embankments are considered to be a reliable solution for the problem of embankment construction on soft foundation soils. This paper presents a three-dimensional numerical study using the finite element method conducted on a GRPS embankment in order to investigate the load transfer mechanism. Three dimensional model results are compared with the existing design methods, to observe the inconsistencies of currently available design methods.

RÉSUMÉ: En raison de la croissance rapide de la population mondiale et le manque de terres propices à la construction, remblais sont largement construits sur des dépôts de solsouples à l'heure actuelle. Cependant, il ya de nombreux problèmes associés à la construction de remblais sur des sols mous, tels que de grands établissements sur une longue période de temps due à la consolidation des sols de fondation et de l'instabilitéde la digue à la suite de caractéristiques indésirables de sol mou comme la compressibilité élevée, insuffisante résistance au cisaillement et faible capacité portante. Géosynthétiques Pieu-charge (GRPS) remblais sont considérés comme une solution fiable pour le problème de la construction de remblais sur sols mous de fondation. Cet article présente une étude numérique tridimensionnelle à l'aide de laméthode des éléments finis réalisé sur un remblai GRPS afin d'enquêter sur le mécanisme de transfert de charge. Trois résultats du modèle dimensions sont comparés avec les méthodes de conception existantes, d'observer les incohérences des méthodes de conception actuellement disponibles.

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Cite this article:
Priyanath Ariyarathne; D. S. Liyanapathirana; C.J. Leo (2012) Load transfer mechanism in geosynthetic reinforced pile-supported embankments: Three dimensional numerical modelling in GEO2012. Ottawa, Ontario: Canadian Geotechnical Society.

@article{Paper200,author = Priyanath Ariyarathne; D. S. Liyanapathirana; C.J. Leo,title = Load transfer mechanism in geosynthetic reinforced pile-supported embankments: Three dimensional numerical modelling,year = 2012}