Estudo de curvas características de solos que compõem o perfil geotécnico da Formação Guabirotuba

Abstract

Compared to the classic soil mechanics, the unsaturated soil mechanics still not very advanced. This work is presented intending to help the development of this area. Using samples of soils of three different horizons of the Guabirotuba formation, through the axis translation technique, with the pressure plate method, the drying soil-water characteristic curves was determined. The data was then be compared to the equations proposed by the literature, using the SciDavis software, to define which best describe the studied material. The best fitting curve for the experimental data was the curve that used the equation proposed by Fredlund and Xing (1994) for the three horizons. At the end, two new equations are proposed. These equations show relevant results for the local soil and suctions under 1000kPa. Under this conditions one of the proposed equations reach a better result than the one proposed by Fredlund e Xing (1994).