Chapter 4, Problem 4.7QPP

Using the CPT data in Figure 4.22, a unit weight of $115{\text{lb/ft}}^{\text{3}},$ and an over consolidation ratio of 3, determine the following for the soil between depths of 21 and 23 ft. Use a groundwater depth of 15 ft below the ground surface.

1. Soil behavior type
2. $D_r$ (assume the soil has some fines, but no mica)
3. Consistency (based on Table 3.3)
4. $\varphi \text{'}$
5. $N_{60}$ (use an estimated $D_{50}$ Of 0.60 mm)