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Question 9.10: The static cone penetration resistance at a site at 10 m dep...

The static cone penetration resistance at a site at 10 m depth is 2.5 MN / m ^{2}. The friction ratio obtained from the test is 4.25%. If the unit weight of the soil is 18.5 kN / m ^{3}, what type of soil exists at the site.

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\begin{aligned}q_{c} &=2.5 \times 1000 kN / m ^{2}=2500 kN / m ^{2}=26.1 tsf \\p_{0}^{\prime} &=10 \times 18.5=185 kN / m ^{2}=1.93 tsf \\q_{c n} &=26.1(1-1.25 \log 1.93)=16.8 tsf \\R_{f} &=4.25 \%\end{aligned}

From Fig 9.16, the soil is classified as clayey silt to silty clay to clay

9.10

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