How to derive the capacity of load-bearing piles?
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The ultimate load bearing capacity for cohesive soil can be define by following formula:
Qu = Ultimate load capacity, kN
Ap = Cross-sectional area of pile tip, in m2
Nc = Bearing capacity factor, may be taken as 9
ci = Average cohesion for the ith layer, in kN/m2
Asi = Surface area of pile shaft in the ith layer, in m2