GATE CE 2026 Set 2 — Question 33
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Geotechnical Engineering → Seepage → Phase Relationships
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Question
A fully saturated sandy soil deposit has water content 20 % and specific gravity 2.65. The critical hydraulic gradient for seepage through the soil to create the quicksand condition is _____________ (rounded off to two decimal places).
Correct answer
1 to 1.15
Solution
Given:
Water content () = 20% = 0.20
Specific gravity () = 2.65
Degree of saturation () = 100% = 1 (fully saturated)First, find the void ratio () using the relation :
The critical hydraulic gradient () is given by the formula:
Rounding off to two decimal places, the critical hydraulic gradient is .
Water content () = 20% = 0.20
Specific gravity () = 2.65
Degree of saturation () = 100% = 1 (fully saturated)First, find the void ratio () using the relation :
The critical hydraulic gradient () is given by the formula:
Rounding off to two decimal places, the critical hydraulic gradient is .
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