Verdichtung von proben eines dystrandepts und palehumults aus südchile

Abstract

Samples were taken from one of the upper layers in each of four profiles, two of each of a Dystrandept and a Palehumult. One profile of each kind of soil was in a lightly grazed and the other in a heavily grazed area. The samples were then loaded and unloaded at three different moisture contents. From the compression curves for the samples, the maximum pressure applied to the soil in the past, the compression index, the volumetric compressibility coefficient, the expansion index and the modulus of elasticity were computed. The mechanical coefficients for the Palehumult samples are correlated under both light and heavy loadings with bulk density, moisture contents and past levels of grazing. For the Dystrandept samples under light loadings, however, the coefficients are correlated with degree of aggregation and the nature of the mineral components. In contrast, the relations of the Dystrandept under heavy loading with bulk density and moisture levels are similar to those for the Palehumult samples.