The hydro-mechanical model for unsaturated soils has
been presented based on the effective stress principle taking into
account effects of drying-wetting process. The elasto-plastic
constitutive equations for stress-strain relations of the soil skeleton
have been established. A plasticity model is modified from modified
Cam-Clay model. The hardening rule has been established by
considering the isotropic consolidation paths. The effect of dryingwetting
process is introduced through the ¤ç parameter. All model
coefficients are identified in terms of measurable parameters. The
simulations from the proposed model are compared with the
experimental results. The model calibration was performed to extract
the model parameter from the experimental results. Good agreement
between the results predicted using proposed model and the
experimental results was obtained.
[1] R. W. Lewis, and B. A. Schrefler, The Finite Element Method in the
Deformation and Consolidation of Porous Media, John Wiley and Sons,
UK, 1987.
[2] D. C. Sheng, S. W. Sloan, and A. Gens, "Finite element formulation and
algorithms for unsaturated soils. Part I: Theory," International Journal
for Numerical and Analytical Methods in Geomechanics, vol. 27, no. 9,
2003, pp. 745-765.
[3] B. Loret, and N. Khalili, "An Effective Stress Elastic-plastic Model for
Unsaturated Porous Media," Mechanics of Materials, vol. 34, 2002, pp.
97-116.
[4] D. Gallipoli, A. Gens, R. Sharma, and J. Vaunat, "An elasto-plastic
model for unsaturated soil incorporating the effects of suction and
degree of saturation on mechanical behaviour," Geotechnique, vol. 53,
no. 1, 2003, pp. 123-135.
[5] A. W. Bishop, The Principle of Effective Stress, Teknish Ukebladk,
Norway, 1959, pp. 859-863.
[6] A. Uchaipichat, and N. Khalili, "Experimental investigation of thermohydro-
mechanical behaviour of an unsaturated silt," Geotechnique, vol.
59, no. 4, 2009, pp. 339-353.
[7] D. M. Wood, Soil Behaviour and Critical State Soil Mechanics,
Cambridge University Press, Cambridge, UK., 1990.
[8] E. E. Alonso, A. Gens, and A. Josa, "A constitutive model for partially
saturated soils," Geotechnique, vol. 40, no. 3, 1990, pp. 405-430.
[9] S. J. Wheeler, and V. Sivakumar, "An elasto-plastic critical state
framework for unsaturated soils," Geotechnique, vol. 45, no. 1, 1995, pp.
35-54.
[10] Y. J. Cui, and P. Delage, "Yielding and plastic behaviour of an
unsaturated compacted silt," Geotechnique, vol. 46, no. 2, 1996, pp.
291-311.
[11] J. R. Rice, and M. P. Clearly, "Some basic stress diffusion solutions of
fluid saturated elastic porous media with compressible constituents,"
Review of Geophysics, vol. 14, no. 2, 1976, pp. 227-241.
[1] R. W. Lewis, and B. A. Schrefler, The Finite Element Method in the
Deformation and Consolidation of Porous Media, John Wiley and Sons,
UK, 1987.
[2] D. C. Sheng, S. W. Sloan, and A. Gens, "Finite element formulation and
algorithms for unsaturated soils. Part I: Theory," International Journal
for Numerical and Analytical Methods in Geomechanics, vol. 27, no. 9,
2003, pp. 745-765.
[3] B. Loret, and N. Khalili, "An Effective Stress Elastic-plastic Model for
Unsaturated Porous Media," Mechanics of Materials, vol. 34, 2002, pp.
97-116.
[4] D. Gallipoli, A. Gens, R. Sharma, and J. Vaunat, "An elasto-plastic
model for unsaturated soil incorporating the effects of suction and
degree of saturation on mechanical behaviour," Geotechnique, vol. 53,
no. 1, 2003, pp. 123-135.
[5] A. W. Bishop, The Principle of Effective Stress, Teknish Ukebladk,
Norway, 1959, pp. 859-863.
[6] A. Uchaipichat, and N. Khalili, "Experimental investigation of thermohydro-
mechanical behaviour of an unsaturated silt," Geotechnique, vol.
59, no. 4, 2009, pp. 339-353.
[7] D. M. Wood, Soil Behaviour and Critical State Soil Mechanics,
Cambridge University Press, Cambridge, UK., 1990.
[8] E. E. Alonso, A. Gens, and A. Josa, "A constitutive model for partially
saturated soils," Geotechnique, vol. 40, no. 3, 1990, pp. 405-430.
[9] S. J. Wheeler, and V. Sivakumar, "An elasto-plastic critical state
framework for unsaturated soils," Geotechnique, vol. 45, no. 1, 1995, pp.
35-54.
[10] Y. J. Cui, and P. Delage, "Yielding and plastic behaviour of an
unsaturated compacted silt," Geotechnique, vol. 46, no. 2, 1996, pp.
291-311.
[11] J. R. Rice, and M. P. Clearly, "Some basic stress diffusion solutions of
fluid saturated elastic porous media with compressible constituents,"
Review of Geophysics, vol. 14, no. 2, 1976, pp. 227-241.
@article{"International Journal of Earth, Energy and Environmental Sciences:52394", author = "A. Uchaipichat", title = "A Hydro-Mechanical Model for Unsaturated Soils", abstract = "The hydro-mechanical model for unsaturated soils has
been presented based on the effective stress principle taking into
account effects of drying-wetting process. The elasto-plastic
constitutive equations for stress-strain relations of the soil skeleton
have been established. A plasticity model is modified from modified
Cam-Clay model. The hardening rule has been established by
considering the isotropic consolidation paths. The effect of dryingwetting
process is introduced through the ¤ç parameter. All model
coefficients are identified in terms of measurable parameters. The
simulations from the proposed model are compared with the
experimental results. The model calibration was performed to extract
the model parameter from the experimental results. Good agreement
between the results predicted using proposed model and the
experimental results was obtained.", keywords = "Drying-wetting process, Effective stress, Elastoplasticmodel, Unsaturated soils", volume = "4", number = "8", pages = "339-5", }