Question

The minimum width in the elementary profile of a gravity dam required to retain the water with a head of 60 m is _________ m.
$[\text{Take}\mu =0.65,G=2.4,C=1]$

• A. 65.93

Answer 1

The correct option is A 65.93
For no tension failure,
$B_{min}=\frac{H}{\sqrt{G-C}}=\frac{60}{\sqrt{2.4-1}}=50.71m$

For dam to be safe in sliding,
$B_{min}=\frac{H}{\mu (G-C)}=\frac{60}{0.65(2.4-1)}=65.93m$

$\therefore B_{min}=\text{Maximum of}\left(65.93\&50.71\right)$
$=65.93m$