Geotechnical Engineering:

A pole is held vertically on a soil surface by three equally spaced wires tied to the top of the pole. Each wire has a tension of $1$kn and is inclined at $45$ degrees to the vertical.

Calculate:

A$.$ The increase in vertical stress at depth $1$m below the surface.

B$.$ The amount of elastic settlement below the axis of the pole if E $=40$MPa and v $=0\mathrm{.}45$

Assume for part A that the pole acts as a point load, and assume for part B that the pole sits on a $0\mathrm{.}3$ by $0\mathrm{.}3$ meter square footing.