Estudo preliminar do comportamento das correlações para o solo residual basáltico.

Abstract

The general aim of this research is to study the inter-relational behavior of geotechnical parameters, adopting mechanisms from graphic-statistic analysis, in basaltic residual soils. Existing data was searched through review of updated researches regarding basaltic residual soil. Additionally, an undisturbed soil sample was collected at UFFS - Campus Erechim for direct shear test, under flooded conditions. The database is comprised of forty-five sampling points and their respective geotechnical characteristics. The study correlated a set of eighteen parameters, applying coefficients of correlation and determination, for statistical analysis. Highlights include the angle of friction by sand fraction, the activity ratio by cohesion, the saturation degree by moisture content, and the void ratio by specific dry weight. The crossing of these parameters provided a coefficient of determination deemed satisfactory. Clay fraction by cohesion, saturation degree by specific dry weight, specific dry weight by cohesion, and angle of friction by void ratio show a moderate linear tendency. Data obtained from the soil sample: internal angle of friction 23,33°; cohesion intercept 10kPa. For the generic Coulomb line, investigation employing all research soils obtained cohesion intercept 18,27 kPa and internal angle of friction 25,16°. Observation indicates that the application of different functions for shear resistance can overcome the lack of linearity and homogeneity of the residual soils. Parametric analyses were performed satisfactorily.