A rectangular footing $2m$ by $3m$ is placed at $2m$ depth in a deposit of cohesionless sand. The friction angle of the soil

is $35.$ The water table is located at the base of the foundation. The unit weight of the soil above the ground water

table is $18k\frac{N}{m^3}$ while below the ground water table is $20k\frac{N}{m^3}.$ Determine:

a$)$ The net ultimate bearing capacity

b$)$ The safe load for a safety factor of $3\mathrm{.}0.$ The excavation is backfilled.

The bearing capacity factors for strip footing for $=35,Nc=57,N_q=42$ and $N_Y=43$

$[$Ans: a$)1849k\frac{N}{m^2}$ b$)3914$ kN $]$