The figure shows the 1-D compression curve for a clay. (a) Using log interpolation between 100 and 1000, determine the v value at a vertical

The figure shows the 1-D compression curve for a clay.

(a) Using log interpolation between 100 and 1000, determine the σ’v value at a vertical strain, σ’v = 20%.

(b) If the initial void ratio, eo = 0.846, determine Cr and Cc for this soil. For Cc, use the portion of the curve between σ’v = 200 and 800 kPa.

(c) If the original clay layer thickness is 9.5 m, determine the settlement that occurs in the layer when it is loaded from 70 to 200 kPa.

T 10 20 30 40 10 Effective consolidation stress, oc (kPa) 100 1000 Vertical strain, e, (%)