Question $4$:

$($Value: $20$ marks$)$

Figure $2$ shows the plan view of a condominium structure. The foundation of the building

$($shaded area$)$ will be loaded with a uniform stress of $50$kPa. Determine the increase in

vertical stress ${}_z$ due to the load, at depths of $2$ and $5m$ vertically below point $A($Use

superposition method$).$ Comment on the stress values determined at different depths and

how this information is useful for a geotechnical engineer.

Figure $2$