A cylindrical sample of soil is isotropically compressed under drained condition with a vertical stress of 100 kPa and a radial stress of 100 kPa. Subsequently, the axial stress was held constant and the radial stress was increased to 300 kPa under an un-drained condition.
(a) Create a graph with the x-axis as p, p' and the y-axis as q. Calculate and plot the initial mean effective stress and deviatoric stress
(b) Calculate the increase in mean total stress and deviatoric stress.
(c) Plot the current total and effective stress paths (assume the soil is a linear, isotropic, elastic material).
(d) Determine the slopes of the total and effective stress paths and the maximum excess pore water pressure.