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Question

A single pile, 50 cm in diameter and 15 m long is driven in clay having an average un-confined compressive strength of 100 kN/m2. The ultimate bearing capacity of the pile, neglecting end bearing, if any, and assuming shear mobilization factor of 0.8 around the pile is

A
942 kN
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B
1884 kN
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C
1177.5 kN
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D
1334.5 kN
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Solution

The correct option is A 942 kN
The skin friction resistance,

fs=αcu

cu=100/2=50 kN/m2

Ultimate bearing capacity =α cu PL

=0.8×50×(π×0.5)×15
= 942.5 kN

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