Practice problem Spread footing.

A foundation, $1\mathrm{.}5m$ square, will carry a load of $300k\frac{N}{m^2}$ and will be founded at a depth of $750mm$

in a deep deposit of granular soil. The soil may be regarded as saturated with a unit weight of $20$

$k\frac{N}{m^3}.$ For computation assume unit weight remains the same.

If the ground water level occurs at a depth of $3m$ below the surface of the soil, determine the resulting

settlement immediately after construction, as well as $20$ years after.

Below is a table representing the cone resistance obtained from the penetration test.