HAND WRITTEN ANSWERS ONLY PLEASE:

A vertical retaining wall has a design height of $6\mathrm{.}0$ m and is being used to support a

saturated clay. The clay has a unit weight of $19\mathrm{.}4$kN$//$m$^(3)$ and an unconfined compression

strength $($ q$\_($u$))$ of $120$ kPa $.$ Use Rankine's active earth pressure theory to draw the

horizontal stress profile acting behind the wall, and determine the total active force acting

against the wall as well as its line of action relative to the base of the wall. Also, estimate

the depth up to which a tensile crack can occur $($H$\_($c$)).$