For a shallow strip footing on a saturated clay under undrained conditions (φ = 0 analysis), Terzaghi's bearing capacity equation reduces to:
Choose the correct answer
q_u = c_u × N_c (N_c = π + 2 ≈ 5.14)
q_u = c_u × N_c + γD_f × N_q
q_u = c_u × 5.7 + γD_f
Both A and C since N_c = 5.7 for strip
Correct Answer
D. Both A and C since N_c = 5.7 for strip
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For φ=0 (undrained loading of saturated clay): N_q=1, N_γ=0, N_c=π+2=5.14 (Terzaghi uses N_c=5.7 for strip with local shear correction). q_u = c×N_c + γD_f×1. Both N_c=5.14 and 5.7 are used in different formulations. Answer: N_c=5.7 for strip footing in Terzaghi's original.
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