Question

Cone penetrometer soundings were used for the subsurface investigation of a planned construction site. At one sounding location, the value recorded for $q_e$ at a depeh of 21 feet was $150 \mathrm{ksf}$. The soil has a unit weight of 115 pet. Using criteria that relate CPT resalts and the soil angle of internal friction, estimate the valoe of $\phi$ for the sand at the test depth (known from borings).

   Cone penetrometer soundings were used for the subsurface investigation of a planned construction site. At one sounding location, the value recorded for $q_e$ at a depeh of 21 feet was $150 \mathrm{ksf}$. The soil has a unit weight of 115 pet. Using criteria that relate CPT resalts and the soil angle of internal friction, estimate the valoe of $\phi$ for the sand at the test depth (known from borings).

Essentials of soil mechanics and foundations : basic geotechnics

David F. McCarthy 7th Edition

Chapter 11, Problem 18

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Step 1

The relationship is given by the equation: $q_c = \sigma'_{vo} \cdot N_q$, where $\sigma'_{vo}$ is the effective vertical stress at the depth of the sounding and $N_q$ is a bearing capacity factor related to the soil type. Show more…

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Cone penetrometer soundings were used for the subsurface investigation of a planned construction site. At one sounding location, the value recorded for $q_e$ at a depeh of 21 feet was $150 \mathrm{ksf}$. The soil has a unit weight of 115 pet. Using criteria that relate CPT resalts and the soil angle of internal friction, estimate the valoe of $\phi$ for the sand at the test depth (known from borings).

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