Part$-$B:

A $25\mathrm{.}0m$ diameter oil tank is to be built on the soil profile given above. The foundation of the tank is $1\mathrm{.}5m$ below the ground surface. The tank, its contents, and the foundation have a total mass of $9\mathrm{.}5{10}^{6}kg.$ Compute the induced vertical stress below the center of the tank to a depth where induced stress becomes $10\%$ of the contact pressure. Combine the induced stress plot with the plots obtained in Part$-$A$.$

Induced stress below the center of a circular loaded area can be computed as:

$=q[1-(\frac{1}{1+(\frac{B}{2z_f}{)}^2}{)}^{1\mathrm{.}5}]$

Part$-$C:

Based on the above stress plots, comment if the requirement of minimum depth of boreholes is met or not.