ONE-DIMENSION CONSOLIDATION ANALYSIS OF SOFT SOILS UNDER EMBANKMENT LOADING WITH VARIABLE COMPRESSIBILITY AND PERMEABILITY

Tóm tắt

Terzaghi’s 1D consolidation theory is commonly used for evaluation of consolidation characteristics of soft soils. As several simplifying assumptions have been make to resolve differential equation for one-dimensional of consolidation. In particular, the assumption of constant value for coefficient of consolidation Cv during consolidation process is one of the major limitations in Terzaghi’s theory, it is not entirely consistent with reality. In this paper a one-dimensional nonlinear partial differential equation is derived for prediction of consolidation characteristics of soft clays considering variable values for Cv based on linear relationships for e-Log(σ′) and e-Log(k). The nonlinear partial differential equation has been solved by a finite difference method. A example has been implemented to show that the result of average degree of consolidation is different from as calculating nonlinear consolidation theory and Terzaghi’s theory. The nonlinear partial differential equation has been solved by a finite difference method. A example has been implemented to show that the result of average degree of consolidation is different from as calculating nonlinear consolidation theory and Terzaghi’s theory.