Multiple choice

The base width of an elementary profile of gravity dam of height H is b. The specific gravity of the material of the dam is G and uplift pressure coefficient is K. The correct relationship for no tension at the heel is given by

  1. $\frac{b}{H} = \frac{1}{\sqrt{G - K}}$
  2. $\frac{b}{H} = \sqrt{G - K}$
  3. $\frac{b}{H} = \frac{1}{G - K}$
  4. $\frac{b}{H} = \frac{1}{K \sqrt{G - K}}$
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A Correct answer
Explanation

 $\text{Tension will not be developed at heel with full reservoir when}$ $b > \frac{H}{\sqrt{G - K}} \\ \frac{b}{H} = \frac{1}{\sqrt{G - K}}$

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