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Modelling of combined vacuum and surcharge preloading with vertical drains
| Content Provider | Semantic Scholar |
|---|---|
| Author | Indraratna, Buddhima Rujikiatkamjorn, Cholackat Kelly, Richard |
| Copyright Year | 2009 |
| Abstract | In this study, 2D and 3D numerical analyses were conducted to predict embankment behaviour on soft clay foundations stabilised by Combined Vacuum and Surcharge Preloading. To determine the equivalent plane strain permeability, a revised conversion procedure for plane strain condition considering linear permeability variation in the smear zone is proposed. The equivalent permeability coefficients are then incorporated in finite element codes, employing the modified Cam-clay theory. The advantages and limitations of vacuum application through vertical drains are discussed through two selected case histories from China and Australia and the predictions are compared with the available field data. Apart from realistic 3D numerical modelling, it is demonstrated that the equivalent plane strain analysis can now be used as a predictive tool with acceptable accuracy. RESUME Des etudes numeriques en 2D et 3D ont ete entreprises pour predire le comportement d’un remblai sur argile molle amelioree par consolidation sous vide combinee avec un prechargement. La permeabilite equivalente en deformation plane est determinee a l’aide d’une methode de conversion revisee qui suppose une variation lineaire de la permeabilite dans la zone remaniee. Les coefficients de permeabilite equivalente sont alors introduits dans les codes a elements finis incorporant le modele Cam Clay Modifie. L’analyse de deux cas d’etudes, choisis de la Chine et de l’Australie, a permis de discuter les avantages et limitations de la consolidation sous vide a travers la comparaison entre les predictions et les mesures en place. A defaut d’une modelisation numerique 3D realiste, il a ete prouve que l’etude en deformation plane equivalente constitue un moyen de prediction de precision acceptable. |
| Starting Page | 2204 |
| Ending Page | 2207 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.3233/978-1-60750-031-5-2204 |
| Alternate Webpage(s) | https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1528&context=engpapers |
| Alternate Webpage(s) | https://www.issmge.org/uploads/publications/1/21/STAL9781607500315-2204.pdf |
| Alternate Webpage(s) | https://doi.org/10.3233/978-1-60750-031-5-2204 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
