A precast square concrete pile 305x305 mm in cross section isdriven into ground using a steam hammer. If HE = 40 kN-m, E = 0.85,WR = 35 kN, weight of pile cap = 3.0 kN, L = 25 m, n = 0.4, Ep = 21x 106 kN/m2 , number of blows for the last 25.4 mm pile penetrationis 7 blows, unit weight of concrete = 24 kN/m3 . Compute theallowable pile capacity using: (a) Modified ENR formula (FS=6) (b)Danish formula (FS =4) (c) Janbu’s formula (FS=3) (d) PCUBC formula(FS=3)
