Multiple choice

A group of 16 piles of 10 m length and 0.5 diameter is installed in a 10 m thick stiff clay layer underlain by rock. The pile-soil adhesion factor is 0.4; average shear strength of soil on the sides is 100 kPa; undrained shear strength of the soil at the base is also 100 kPa.

The base resistance of single pile is

  1. 40.00 kN

  2. 88.35 kN

  3. 100.00 kN

  4. 176.71 kN
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Base resistance = Area * Nc * Cu. For a pile, Nc is typically 9. Area = pi/4 * 0.5^2 = 0.19635 m^2. Base resistance = 0.19635 * 9 * 100 = 176.71 kN.

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