@article{10902/12459,
year = {2018},
month = {6},
url = {http://hdl.handle.net/10902/12459},
abstract = {This paper presents a novel, exact, semi-analytical solution for the quasi-static undrained expansion of a
cylindrical cavity in soft soils with fabric anisotropy. This is the first theoretical solution of the undrained expansion of a cylindrical cavity under plane strain conditions for soft soils with anisotropic behaviour of plastic nature. The solution is rigorously developed in detail, introducing a new stress invariant to deal with the soil fabric. The semianalytical solution requires numerical evaluation of a system of six first-order ordinary differential equations. The results agree with finite element analyses and show the influence of anisotropic plastic behaviour. The effective stresses at critical state are constant, and they may be analytically related to the undrained shear strength. The initial vertical cross-anisotropy caused by soil deposition changes towards a radial cross-anisotropy after cavity expansion. The analysis of the stress paths shows that proper modelling of anisotropic plastic behaviour involves modelling not only the initial fabric anisotropy but also its evolution with plastic straining.},
organization = {The research was initiated as part of GEO-INSTALL (Modelling Installation Effects in
Geotechnical Engineering, PIAP-GA-2009-230638) and CREEP (Creep of
Geomaterials, PIAP-GA-2011-286397) projects supported by the European Community
through the programme Marie Curie Industry-Academia Partnerships and Pathways
(IAPP) under the 7th Framework Programme.},
publisher = {Springer},
publisher = {Acta Geotechnica, 2018, 13(3), 729-746},
title = {Undrained expansion of a cylindrical cavity in clays with fabric anisotropy: theoretical solution},
author = {Sivasithamparam, Nallathamby and Castro Gonzalez, Jorge},
}