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Bore Pile Ø 0.40x12.00 m. (BH1.)
1) Ø = 0.400 m.
Ap = 0.126 m.2
2) At Depth 3-5 m. = 2 m.
Nfield = 20.000 blows/ft.
Nadjust = 17.500 blows/ft.
Cu From boringlog = 10.719 t./m.2
α From Holmberg (1977) = 0.520
Qs (α.Cu)P.L = 14.008 t.
3) At Depth 5-6 m. = 1 m.
Nfield = 12.500 blows/ft.
Nadjust = 0.000 blows/ft.
Cu From boringlog = 7.656 t./m.2
α From Holmberg (1977) = 0.625
Qs (α.Cu)P.L = 6.013 t.
4) At Depth 6-8 m. = 2 m.
Nfield = 11.667 blows/ft.
Nadjust = 0.000 blows/ft.
Cu From boringlog = 7.146 t./m.2
α From Holmberg (1977) = 0.680
Qs (α.Cu)P.L = 12.212 t.
5) At Depth 8-10 m. = 2 m.
Nfield = 14.000 blows/ft.
Nadjust = 0.000 blows/ft.
Cu From boringlog = 8.575 t./m.2
α From Holmberg (1977) = 0.620
Qs (α.Cu)P.L = 13.362 t.
6) At Depth 10-11.5 m. = 1.5 m.
Nfield = 24.200 blows/ft.
Nadjust = 19.600 blows/ft.
Cu From boringlog = 12.005 t./m.2
α From Holmberg (1977) = 0.437
Qs (α.Cu)P.L = 9.889 t.
7) At Depth 11.5 -13 m. = 1.5 m.
Nfield = 57.200 blows/ft.
Nadjust = 36.100 blows/ft.
Cu From boringlog = 22.111 t./m.2
α From Holmberg (1977) = 0.250
Qs (α.Cu)P.L = 10.420 t.
8) At Depth 13 - 15 m. = 2 m.
Nfield = 83.000 blows/ft.
Nadjust = 49.000 blows/ft.
Cu From boringlog = 30.013 t./m.2
α From Holmberg (1977) = 0.208
Qs (α.Cu)P.L = 15.689 t.
9) End Bearing
Qp 9.Cu.Ap = 33.943 t.
10) Net Allowable Compression Load Capacity = 45 t./pile.

* Facter of safety = 2.5
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