Canadian Geotechnical Journal | 2019
Analysis of Cylindrical Cavity Expansion in Anisotropic Critical State Soils Under Drained Conditions
Abstract
This paper presents a semi-analytical solution for the drained cylindrical cavity expansion problem using the well-known anisotropic modified Cam Clay model proposed by Dafalias (1987). The prominent feature of this elastoplastic model, i.e., its capability to describe both the initial fabric anisotropy and stress-induced anisotropy of soils, makes the anisotropic elastoplastic solution derived herein for the cavity problem a more realistic one. Following the novel solution scheme developed by Chen and Abousleiman (2013) that links between the Eulerian and Lagrangian formulations of the condition of radial equilibrium, the plastic zone solution can be eventually obtained by solving a system of eight partial differential equations with the three stress components, three anisotropic hardening parameters, specific volume, and preconsolidation pressure being the basic unknowns. Parametric studies have then been conducted to explore the influences of K_0 consolidation anisotropy and overconsolidation ratio (OC...