Skin friction in soft clay (A to B) = 10,560 lbs Skin friction from “C” to “D” = 609.7 × surface perimeter area This is due to the fact that skin friction does not increase after the critical depth. Unit skin friction is constant from C to D. Skin friction at point “C” = Kσ′ v × tan δ × A p Skin friction reaches a constant value at point “C”, 20 diameters into the bearing layer. Step 3: Find the skin friction from C to D: Skin friction from B to C = Kσ′ v × tan δ × A p 5 k P a )Īverage effective stress along pile shaft from B to C = ( σ B + σ C)/2
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