One dimensional consolidation equation of soils for the embankment material.

In consolidation tests on compacted soils as embankment materials, the curve representing the time versus settlement relationship has a characteristic shape, due partly to the great amount of immediate settlement. On the basis of this phenomenon, the author derived a consolidation equation for unsaturation using a stress-strain relation employing a viscoelastic (Voigt's) model. In order to approximate experimental values to the equation for the degree of consolidation, the author developed a method for determining several parameters of consolidation, which govern the behavior of compacted soils consolidation. It was concluded that the application of this method gave satisfactory agreement for the time versus consolidation settlement relationships in case of both sudden settlement just after consolidation loading and without such immediate settlement. For the application of this method, the computed parameters indicated are Young's modulus, the coefficient of viscosity, the compressibility of the pore fluid, the unsaturated permeability and so on, for an example consolidation of pressure p=6.4kgf/cm2.It is noteworthy that the values obtained here are appropriate