Pile Capacity Calculator

Calculate pile bearing capacity from end bearing and shaft friction per Japanese standards and Eurocode 7 — free geotechnical tool

Driven PileBored Pile

Qp = α·N·Ap (End Bearing)

Qs = Σ(fi·Li·π·D) (Shaft Friction)

Qu = Qp + Qs, Qa = Qu / 3

α = 300 kN/m²

Pile Parameters

Pile Diameter D (m)

Tip Bearing N-value

Soil Layers

Layer 1

Thickness (m)

N-value

Soil Type

SandClay

Layer 2

Thickness (m)

N-value

Soil Type

SandClay

Layer 3

Thickness (m)

N-value

Soil Type

SandClay

Shaft Friction by Layer

Layer	Thickness (m)	N-value	Soil	fi (kN/m²)	Qsi (kN)
1	5.0	10	Sand	20.0	188.5
2	8.0	5	Clay	40.0	603.2
3	3.0	30	Sand	60.0	339.3

Results

Pile Length

16.0 m

Tip Area Ap

0.2827 m²

End Bearing Qp

4241.2 kN

Shaft Friction Qs

1131.0 kN

Ultimate Capacity Qu

5372.1 kN

Allowable Capacity Qa (= Qu/3)

1790.7 kN