Bearing Capacity Factors: Terzaghi
Bearing capacity factors (Nc, Nq, N_gamma) by friction angle for foundation design — Terzaghi, Meyerhof, Hansen, and Vesic methods
| method | phi deg | N gamma (dimensionless) | Nc (dimensionless) | Nq (dimensionless) | Nq Nc ratio (dimensionless) | notes |
|---|---|---|---|---|---|---|
| Terzaghi | 0 | 0 | 5.7 | 1 | 0.175439 | Nq=a^2/(2cos^2(45+phi/2)) a=exp((0.75pi-phi/2)tan(phi)); Nc=(Nq-1)cot(phi); Ngamma tabulated (Kumbhojkar 1993); strip footing general shear |
| Terzaghi | 1 | 0.1 | 5.997189 | 1.104681 | 0.1842 | Nq=a^2/(2cos^2(45+phi/2)) a=exp((0.75pi-phi/2)tan(phi)); Nc=(Nq-1)cot(phi); Ngamma tabulated (Kumbhojkar 1993); strip footing general shear |
| Terzaghi | 2 | 0.2 | 6.300446 | 1.220016 | 0.19364 | Nq=a^2/(2cos^2(45+phi/2)) a=exp((0.75pi-phi/2)tan(phi)); Nc=(Nq-1)cot(phi); Ngamma tabulated (Kumbhojkar 1993); strip footing general shear |
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