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A 30 cm diame...

Question

A 30 cm diameter friction pile is embedded 10 m into a homogeneous consolidated deposit. Unit adhesion developed between clay and pile shaft is $4 t / m^{2}$ and adhesion factor is 0.7. The safe load for factor of safety 2.5 will be

A

21.50 t

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B

11.57 t

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C

10.55 t

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D

6.35 t

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Solution

The correct option is C 10.55 t
The friction load capacity,

$q_{f} = α \times c_{u} \times P L$

$G i v e n α = 0.7; c_{u} = 4 t / m^{2}$

$P = π \times 0.3 m; L = 10 m$

$∴ q_{f} = 0.7 \times 4 \times π \times 0.3 \times 10 = 26.4$

$S a f e l o a d = \frac{26.4}{2.5} = 10.55 t$

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