Influência da Temperatura no Comportamento Mecânico de um Solo Mole
The Effect of Temperature in the Mechanical Behavior of a Soft Soil
Keywords:
Thermomechanics, Thermodynamics, Soft Soils, Porous MediaAbstract
For a better understanding of the thermomechanical behavior of soils, new tests and methods has been created
for the thermal characterization to be possible. The understanding of the thermomechanical behavior is also made by the
development of mathematical models that tries to map and explain the constitutive laws of materials inside the
thermo-hydro-mechanical domain. Even though it’s a enormous challenge, great advances had been made in the last
years. The aim of this work is to highlight the importance of the temperature on the physical and mechanical properties of
soils and how they should be implanted into the very known mechanical strenght of materials calculations. Thermodynamical parameters has been extracted as thermal conductivity, thermal expansion coefficient, emissivity, thermal diffusivity, entropy and energy dissipation, putting in evidence the dependency of some soil parameters that are not constant. The variations on the strain rate and the evolution of the yield stress will also be discussed in this work and also the correlation in between some thermodynamical and geomechanical parameters.
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References
BURGER A., RECORDON E., BOVET D., COTTON L. & SAUGY B., Thermique des nappes souterraines, Presses polytechniques romandes, 1985.
LALOUI L. & MODARESSI H., “Effets de la Thermo-Plasticite des argiles sur le comportement des puits de stockage”, 1st International Congress on Environmental Geotechnics, Edmonton, p. 881-887, Ed. BiTech publishers Ltd. 1994.
ROBINET J.C., RAHBAOU A., PLAS F. & LEBON P., “A constitutive thermomechanical model for saturated clays”, Engineering Geology, vol. 41, 1-4, p. 145-169, 1996.
LALOUI L., MORENI M., FROMETIN A., PAHUD D. & VULLIET L., “In-Situ ThermoMechanical Load Tests on a Heat Exchanger Pile”, Proceedings of 4th Intenational Conference on Deep Foundation Practice incorporating Piletalk, Singapore, p. 273-279, 1999.
BALDI G., BORSETTO M., HUECKEL T. & TASSSONI E., “Thermally induced strains and pore pressures in clays”, International symposium on environmental geotechnology, Allentown, p. 391-402, 1985.
FLEUREAU J.M., Influence d’un champ thermique ou électrique sur les phénomènes d’interaction solide-liquide dans les milieux poreux, Doctoral thesis, Ecole Centrale de Paris, 1979.
HUECKEL T. & PELLEGRINI R., “Modeling of thermal failure of saturated clays”, in Numerical models in geomechanics, 81-90, Elsevier, 1989.
BIOT I.M.A., “Thermoelasticity and irreversible thermodynamics”, J. Appt. Phys., 27, p. 240-253, 1956.
HALPHEN B. & NGUYEN Q.S., “Sur les Matériaux Standard Généralisés”, J. de Mécanique, vol. 14, n° 1, 39-63, 1975.
ZIEGLER H., An Introduction to Thermomechanics, North-Holland, Amsterdam, 1977.
ESCALAYA.M., “Avaliação do Efeito de Aumento de Poropressão nas Características de Resistência de Três Solos Tropicais”, 2015.
GALINDO, M. S. V. “Desenvolvimento de uma metodologia para determinação da viscosidade de solos”. Dissertação de mestrado, PUC-Rio, Rio de Janeiro, 2013, 122p.
CARVALHO, T. M. O. “Desenvolvimento de um sistema de medição de variação de volume total de amostras não saturadas em ensaios triaxiais e avaliação da influência da técnica de saturação no comportamento tensão deformação-resistência de solos residuais”. Tese de doutorado, PUC-Rio, Rio de Janeiro, 2012, 401p.
LALOUI L. “Thermo-mechanical behaviour of soils”, 2011.
