Correlación entre el ángulo de fricción y la relación de vacíos en arenas utilizando el ensayo de corte directo

Abstract

The purpose of this research is to establish the correlation between the angle of internal friction () and the void ratio (e) in sands. The data was obtained in the direct shear test, carried out on soils of sandy origin corresponding to the province of Pichincha between the sector of Pomasqui to San Antonio for five groups of different granular soils, applying the ASTM D2487 standard. The perform the correlation, other soils properties were previously determined such as: plasticity indexes (IP), plastic limit (LP), liquid limit (LL), water content (%ω), specific gravity of solid particles (Gs), dry specific gravity (ɤd) and (D50). The samples obtained in the field are altered and were characterized according to the corresponding ASTM regulations requirements. Finally, two analyzes were performed, in the first one the mathematical correlation between the friction angle () and the relationship of voids (e), and in the second one the correlation was improved by incorporating the average particle size (D50). This correlation was validated using undisturbed samples and subjected to direct cut tests, the friction angle. Was determined with the proposed correlation and compared with the friction angle, measured in the direct cut test.