Input
cohesive only
cohesive only
cohless only
cohless only
cohless only
Results
Side resistance Qs—
Tip resistance Qt—
Ultimate Qult = Qs + Qt—
Allowable Qa = Qult/2.5—
Method
Cohesive (α-method): fs = α·su; Qs = fs·π·D·L. Tip: qt = 9·su (clay), capped at 4 MPa. Cohesionless (β-method): fs = β·σv\'·avg ; Qs = fs·π·D·L. Tip: qt = Nq·σv\'(L), capped at 5 MPa. Total Qult = Qs + Qt; Qa = Qult / FS (typical FS ≈ 2.5).