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Quick Sand Condition

A sand deposi...

Question

A sand deposit has a porosity of 1/3 and its specific gravity is 2.5. The critical hydraulic gradient to cause sand boiling in the stratum will be

A

1.5

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B

1.25

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C

1.0

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D

0.75

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Solution

The correct option is C 1.0
$i_{c r} = (G - 1) (1 - n)$

$= (2.5 - 1) \times (1 - \frac{1}{3}) = 1.0$

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