# Redo Problem 12.3 using Coyle and Castellos methods for estimating both Q p and Q s .

## Question:

Redo Problem 12.3 using Coyle and Castello’s methods for estimating both Q_{p} and Q_{s}.

**Problem 12.3**

A 500 mm diameter and 20 m long concrete pile is driven into a sand where γ = 18.5 kN/m^{3} and ϕ' = 32°. Assuming δ' = 0.7ϕ' and K = 1.5 K_{o}, determine the loadcarrying capacity of the pile, with a factor of safety of 3. Use Meyerhof’s method [Eq. (12.18)] for computing the point load carrying capacity Q_{p}, and use Eqs. (12.42) and (12.43) for computing the load-carrying capacity of the pile shaft Q_{s}.

**Eq. (12.18)**

**Eq. (12.42)**

L' ≈ 15D

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**Related Book For**

## Principles Of Foundation Engineering

**ISBN:** 9781337705028

9th Edition

**Authors:** Braja M. Das, Nagaratnam Sivakugan