Abstract

In consolidation theory the pore pressure is outlined as the dissipation over the hydrostatic pressure or the pore pressure in excess of steady state flow condition. The main goal of this study is to formulate the finite difference method by which calculate the pore pressure use MATLAB software and study the effect of load, coefficient of consolidation (Cv) on the value of the pore pressure progressing in two different layers of clay soil. The variation of pore pressure with time within the depth of soil layers is investigated also. A parametric study for three case of load which are fill, strip and rectangle is conducted. The main conclusions of the study outlined that the pore pressure increase with increase the load, the increase more significant for fill load smaller than strip and rectangular loadings. Also, the pore pressure at threshold between two layers increase with the increase of the consolidation coefficient of the first layer (Cv1) and decrease when the consolidation coefficient of the second layer (Cv2) increase and the pore pressure decrease gradually with time in the first and second layers but it increase at the begin of applying load and then decrease until vanishes at the threshold between two layers