SIMULACIÓN TRIDIMENSIONAL DEL PROCESO DE CONSOLIDACIÓN EN FUNDACIONES PROFUNDAS

JAVIER L. MROGINSKI; PABLO A. BENEYTO; H. ARIEL DI RADO; DANIEL E. BISÑUK

Revista Internacional de Ingeniería de Estructuras

ESPE

Año: 2010 vol. 15 p. 203 - 214

1390-0315

The main aim of the present work is the numerical simulation of the saturated and partially saturated soil behavior of deep foundation employing the finite elements method. In order to get an improved accuracy of the spatial representation of the fluid flow problem in porous media three-dimensional formulations analysis are required. For this purpose we used a mixed finite element to model the coupled problem of displacement and pore pressure, the element is a 20-node quadratic hexahedral for the primary unknown (solid phase displacement), combined with an 8-node linear hexahedral for pore pressures. The differential modeling of non-saturated soil consolidation problem was mathematically formulated starting from the coupled fulfillment of the equilibrium conditions and the mass balance equations of liquid and gaseous phases. The proposed numerical example consists in the modeling of the soil consolidation process under a deep foundation pile. This analysis demonstrates the dissipation mechanism of neutral pressures in the soil as well as the time dependence of the deformations.