Question

Depth of foundation depends upon

• A. scour depth, minimum grip length and Rankine depth
• B. scour depth, minimum grip length and depth of bearing stratum
• C. scour depth, Rankine depth and depth of bearing stratum
• D. minimum grip length, Rankine depth and depth of bearing stratum

Answer 1

The correct option is A scour depth, minimum grip length and Rankine depth

For well foundations, the depth of foundatiuon depnds upon
(i) maximum scour level
(ii) grip length
For shallow foundations, the minimum depth of footing is
$D_{f,min}=\frac{q_f}{\gamma }{\left(\frac{1-sin\varphi }{1+sin\varphi }\right)}^2$

$D_{f.min}$ is called Rankine depth