Influência da granulometria na suscetibilidade a liquefação de solos arenosos

Abstract

History records, over the centuries, numerous cases of catastrophic rupture of massive sandy soils, with considerable economic losses, loss of human lives and damage to the environment, caused by the liquefaction of saturated sands. The phenomenon of static liquefaction, object of study in this work, occurs in saturated soils or with a high degree of saturation that present loss of resistance during undrained shear, being common in very soft sands. This phenomenon is, very succinctly, characterized by the loss of strength and stiffness of the soil, enhanced by loading. The request imposes a variation in the soil volume, motivated by the rearrangement of the particles and, consequently, the tensions installed in the soil particles are transferred to the water existing between the grains. Therefore, the soil accumulates excesses of neutral pressure that lead to the reduction of effective stresses, which may be canceled out under non-drained conditions. This phenomenon is called liquefaction. This research aims to present, through triaxial tests, how the granulometry of granular soils can influence the void ratio and consequently its liquefaction potential.