Consolidation of embankments on soils with anisotropic permeability

摘要

Semi-analytic solutions are presented for the consolidation of layered soils that have anisotropic permeability. The method involves applying a Fourier transform and a Laplace transform to the governing equations, solving the equations, and then inverting the transforms to obtain the solution in real time. This means that the solution can be found at any time directly without having to ?march? the solution forward using values obtained at previous times. The results are compared with finite element solutions, and it is shown that the numerical integration schemes used to ?march? the FE solutions forward can greatly affect the results, and recommendations for the integration schemes that give the best FE solutions are given. Design charts are then provided for embankment shaped loadings on consolidating soil layers where the permeability of the soil is anisotropic.