# Standard penetration tests were carried out in sands where the N 60 values at certain depths are

## Question:

Standard penetration tests were carried out in sands where the N_{60 }values at certain depths are reported as follows. The unit weight of the sand is 18.5 kN/m^{3}. The water table is well below the test depths.

Use Eq. (3.13) for C_{N}. Determine the friction angle ϕ' using Eqs. (3.29), (3.30), and (3.31b).

Eq. (3.13)

Eq. (3.29)

Eq. (3.30)

Eq. (3.31b)

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**Related Book For**

## Principles Of Foundation Engineering

**ISBN:** 9781337705028

9th Edition

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