The point load carrying capacity of a 0.5 m diameter pile resting on a saturated clay layer having undrained shear strength of 200 kPa is
- A353.4 kNCorrect
- B253.4 kN
- C314.2 kN
- DNone of these
Solution
Concept
End bearing in clay
Formula
Qp = 9 cu Ap
Step-by-step solution
1. Qp = 9 × 200 × π(0.5)²/4 = 353.4 kN.
Explanation
Nc = 9 for deep foundations in clay.
Why the other options are wrong
Other values do not use Nc = 9.
Shortcut
Qp = 9 cu A.
Correct answer: A) 353.4 kN