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Question
As per Rankine's formula, the minimum depth of foundation in cohesionless soil is equal to
Where, qu = Ultimate bearing capacity of soil
Φ = Angle of internal friction of soil
γ = Unit weight of soil
A.
B.
C.
D.
Answer ( Option B)

Solution

Rankine's formula provides guidance on the minimum depth of foundation based on the bearing capacity of the soil.
herefore, the depth of the foundation can be expressed as
Where,
Df = minimum depth of foundation,
qu = ultimate bearing capacity of the soil, 
γ = unit weight of soil,
Φ = angle of repose or internal friction angle of soil.

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