Ascensão Capilar de Solo Fino Usando Modelo Reduzido

Abstract

: The objective of the article is to analyze the capillary rise of a fine soil of sedimentary origin in a scale model in laboratory. The results showed that the velocity of water rising through the capillaries of soil increased when the soil was compacted with a higher dry unit weight. The expansion of soil started to manifest after the capillary water reached an average of 1/3 of the total height. Over time, the coefficient of permeability decreased in all cases from 0.0005 cm/s to 0.0003 cm/s. It was found that the air intake was located at 25 cm in height and that the matric suction in the soil registered values of 600-800 kPa for saturation degrees between 90%-100%. It was verified that the rise height vs. time curve is mainly influenced by the molding porosity, saturated state permeability coefficient and air entry height.