Question

The mean unconfined compressive strength of a purely cohensive soil was found to be $50kN/m^2$, The ultimate bearing capacity of a square footing calculated by Terzaghi's concept (bearing capacity factor $N_c$ = 5.7) will be

• A. $185.35kN/m^2$
• B. $390.5kN/m^2$
• C. $285kN/m^2$
• D. $142.5kN/m^2$

Answer 1

The correct option is A $185.35kN/m^2$

For a square footing
$q_{nu}=1.3c{N}_c$

$wherec=\frac{50}{2}=25kN/m^2$

$\therefore q_{nu}=(1.3\times 2.5\times 5.7)kN/m^2=185.25kN/m^2$