(a) A completed laboratory compression test performed on a clay sample obtained during the soil borings phase of a subsurface investigation provides results similar to that illustrated by chapter...

(a) A completed laboratory compression test performed on a clay sample obtained during the soil borings phase of a subsurface investigation provides results similar to that illustrated by chapter Figure 14. The “break” in the plotted curve occurs at a compressive pressure of 5,000 psf. The soil sample was obtained at a depth of 15 ft in the soil deposit, and the representative unit weight for the in-place soil is 118 pcf. From this information, determine the OCR for the clay in this deposit.

(b) A completed laboratory compression test on a clay sample indicates is 50 kPa. The sample was recovered from a depth of 4 m in a clay deposit where the representative soil unit weight is 16.5 kN/m³. Indicate the OCR ratio for the deposit and the category of its “consolidated age.”