@Recent Works
Jiro Yamatomi, Sang-Tae Kim and Gento Mogi
University of Tokyo
A Study on Modeling of the Hydromechanical Interactions and Swelling Behaviors of Clayey Rocks
In order to clarify the water infiltration and associated swelling of clay minerals, we have carried out coupled-hydromechanical analysis. Hydromechanically coupled processes must be governed by the linear momentum equation for a deformable porous media and mass conservation equation for fluid which flow through the porous media: the former includes the relationships between swelling pressure and water content as well as the constitutive equations of the stress-strain and the latter does not only the extended Darcy's law but also the state equation of solid and liquid. These governing equations have included three additional properties, swelling parameter and two material parameters. Swelling parameter represents the dissipation of swelling pressure, which is the results of microscopic reorientation and rearrangement of clay particles caused by inter-layer swelling.
In the study, we have proposed a numerical procedure to analyze swelling behaviors and examine the developed coupled-hydromechanical FEM program whose validity and applicability were discussed by comparison of the calculated pressure build-up curves with those experimentally observed in the swelling pressure test and swelling deformation test (Figure 2).
Also, you can find the details of the study in
(a) Jiro Yamatomi, et al.CA study on modeling of the hydromechanical interactions and swellingC (Proc. of the 4th North American Rock Mechanics Symposium, pp.91-97, (Seattle), 2000).
(b) S. Kim, et al., Modeling and simulation of swelling behaviors of clay minerals observed in laboratory, (Int. J. of the Society of Mat. Eng. and Resources, Vol.7(No.1), (751-758), 1999).
(c) S. Kim, et al., Modeling of swelling behaviors of clay minerals for coupled hydromechanical analysis, (Proceedings of the '99 Japan-Korea Joint Symposium on Rock Engineering, (Fukuoka), (287-294), 1999).