Question

Seepage force per unit volume can be expressed as

• A. $i{\gamma }_{w}L$
• B. iL
• C. ${\gamma }_{w}h$
• D. i${\gamma }_w$

Answer 1

The correct option is D i${\gamma }_w$



The seepage pressure is given by,

P = $h_L{\gamma }_w$

Seepage force F = PA

= $h_L{\gamma }_{w}A$

$\frac{Seepageforce}{Volume}=\frac{F}{V}$

$=\frac{h_L{\gamma }_{w}A}{A.L}$

$=\frac{h_L}{L}.{\gamma }_w$

$=i{\gamma }_w$

where, i = hydraulic gradient.