Net ultimate bearing capacity of a footing embedded in a

1. increases with depth of footing only
2. increases with size of footing only
3. increases with depth and size of footing
4. is independent of depth and size of footing

q_u = CN_c + 8DN_q + 0.5 B_γN_γ
For clay, Φ = 0 (pure cohesive)
⇒ N_q = 1, N_γ = 0
⇒ Q_u = CN_c + γD
∴ Q_un = q_u – γD
∴ = CN_C + γD – γD = CN_c