do bi and bii, if u could do it on paper and pen would be nice

affects the effective stress at the bottom of the sand and clay layers.

ii$)$ If the water table rises $2m$ above ground level:

at top,total stress and effective stress is zero

when the water table rises to $2m$ above ground, soil becomes fully

saturated

bi$)$We have to calculate the normal and shear effective stresses

on a shear plane located $8$ meters below the ground level before

the water level rises. We'll also consider the lateral stress ratio in

the clay layer, denoted by $K=0\mathrm{.}6,$ and indicate the directions of

these stresses.

ii$)$ Sketch the Mohr's circle for the effective stress state at this depth, indicating the

points representing the principal stresses and the stresses on the shear plane. On the

same diagram, sketch the Mohr's circle for the effective stress state after the flooding,

assuming the lateral stress ratio does not change with the water table change.