Centrifuge Testing and Numerical Modeling of Drag Embedded Anchors in Soft Clay

John Barrett, Arash Zakeri

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

Session: M1A - Soil Mechanics I

ABSTRACT: This paper describes centrifuge testing of Drag Embedded Anchors (DEA) and numerical prediction of penetration depths in clays. The load capacity of a DEA is a function of anchor geometry, soil type and penetration depth. The prediction of penetration depth of the anchor has a high degree of uncertainty and thus anchor load capacity can be quite variable. The model anchor used in the physical testing was based on the geometry of Vryhof Stevpris Mk 5 and the model test bed was soft clay. The clay was impregnated with lead fillings such that the trajectory of the anchor could be measured post test using a CT scanner. The numerical modeling of the centrifuge test was done using the ABAQUS/Explicit Coupled Eulerian-Lagrangian (CEL) analysis procedure. A customized connection element, used for modeling the behaviour of the anchor cable, proved to be essential in accurately capturing anchor penetration depth. Excellent correspondence is shown between the physical test and numerical simulation and the paper concludes that the CEL procedure is able to predict anchor penetration and installation load. A major outcome of this research is the measurement of the force immediately above the shank.

RÉSUMÉ: Drag Embedded Anchors DEA) ainsi que les résultats la géométrie du modèle Vryhof Stevpris Mk 5 et le sol uti-scan (tomodensitométrie). Les tests faits à la centrifugeuse ont été modélisés numériquement en utilisant la procédure explicite couplée Eulérienne-Lagrangienne (CEL) du logiciel ABAQUS. Afin de reproduire plus précisément la développé à cet effet. Il est démontré que les résultats numériques concordent très bien avec les tests de laboratoire et il est donc conclu que la

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Cite this article:
John Barrett; Arash Zakeri (2012) Centrifuge Testing and Numerical Modeling of Drag Embedded Anchors in Soft Clay in GEO2012. Ottawa, Ontario: Canadian Geotechnical Society.

@article{Paper173,author = John Barrett; Arash Zakeri,title = Centrifuge Testing and Numerical Modeling of Drag Embedded Anchors in Soft Clay,year = 2012}