Question #$1$: $(2)$

A layer of clay $5$ meters thick is expected to undergo consolidation with a new construction project. It has been determined that the increase in stress at the center of the soil layer will be ${}_v=550$kPa. Sample BH$5$ ST$1$ was taken from the center of the clay layer and tested in a consolidation test to determine the essential consolidation parameters.

a$)$ Using the three points identified on the in$-$situ curve of the attached consolidation test data, identify Po$\text{'},$ Pc$\text{'},$ OCR, Cr$,$ & Cc$.$ see consolidation plot. $(3)$

b$)$ Determine the total amount of consolidation settlement. $(2)$

c$)$ Determine how long it will take in days to achieve $90\%$ of the consolidation settlement assuming the clay layer can drain from the top only. $(2)$