Question

The safe allowable stress on the foundation of a gravity dam is $8N/m{m}^2$. If the specific gravity of the dam material is 2.38, the limiting height of the gravity dam will be?

• A. 235 m
• B. 186 m
• C. 262 m
• D. 157 m

Answer 1

The correct option is A 235 m

Limiting height,
$H_{lim}=\frac{f}{{\gamma }_w(G+1-C)}$

where,
$f:\text{allowable stress}=8N/m{m}^2=8\times {10}^{6}N/m^2=8\times {10}^{3}kN/m^2$

taking uplift pressure coefficient (c) = 0

$H_{lim}=\frac{8\times {10}^3}{10\times (2.38+1-0)}$

$=236.68m$