FINITE ELEMENT MODELLING OF STONE COLUMN INSTALLATION: REVIEW OF MODELLING PRACTICES AND CASE STUDY WITH PLAXIS 2D

Olivier Hurley, Mathieu Nuth, Mourad Karray

In the proceedings of: GeoQuébec 2015: 68th Canadian Geotechnical Conference & 7th Canadian Permafrost Conference

Session: Problematic Soils and Ground Improvement I / Sols problématiques et amélioration du comportement I

ABSTRACT: This article discusses the different numerical modelling practices for the stone column installation and establishes a comparative review of the numerical techniques and constitutive laws used in the literature. Furthermore, taking advantage of the best practices in numerical modelling of stone column installation, a numerical model was created with PLAXIS 2D in axisymmetric geometry to reproduce the lateral expansion of stone in sand. The host material is modelled with a hardening soil constitutive relation to represent the repetitive loading and unloading of the sand during expansion. The results are presented in terms of lateral to vertical stress ratio and variation in void ratio and are then calibrated with two experimental stone column tests carried out at an intermediate scale in our laboratory.

RÉSUMÉ: Cet article présente une étude comparative des différentes techniques de modélisation numérique de la mise en place des colonnes ballastées ainsi que les lois constitutives utilisées dans la littérature pour bien représenter les mécanismes rencontrés. Par la suite, prenant en compte la bonne pratique en modélisation numérique, une analyse 2D axisymétrique est réalisée Hardening Soil vérifiée par comparaison avec les résultats de deux colonnes ballastées de grandeurs intermédiaires réalisés en laboratoire .

Please include this code when submitting a data update: GEO2015_609

Access this article:
Canadian Geotechnical Society members can access to this article, along with all other Canadian Geotechnical Conference proceedings, in the Member Area. Conference proceedings are also available in many libraries.

Cite this article: