Title

Equal strain vertical drain consolidation with creep

RIS ID

102622

Publication Details

Walker, R. T. R. (2015). Equal strain vertical drain consolidation with creep. In A. Kulathilaka, K. Senanayake, J. S. M. Fowze, N. Priyankara, P. Rathnaweera, U. Nawagamuwa & N. De Silva (Eds.), Proceedings of the International Conference on Geotechnical Engineering (ICGEColombo2015) (pp. 343-346). Sri Lanka: Sri Lankan Geotecnical Society.

Abstract

Analytical solutions to vertical drain consolidation problems are only available for constitutive models where strain is a function of effective stress. Strain rate dependent soil models are not amenable to ana-lytical solution due to their non-linear nature. By relaxing the requirement for an analytical solution, the equal strain radial consolidation equations provide a simple numerical technique of investigating such non-linear models. The equal strain assumption produces a second order non-linear ordinary differential equation in terms of strain, strain rate, and strain acceleration which is straightforward to solve using freely available ODE solvers. Strain dependent permeability and time dependent loading/vacuum are easily incorporated into the numerical model. This paper presents a parametric study of the new analysis method using the creep model of Yin and Graham (1996).

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