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Consider a clay layer that is 1 m thick. The clay has a compression index of...

Consider a clay layer that is 1 m thick. The clay has a compression index of 0.35, a swell index of 0.07, a permeability of 4 x 10-7 cm/sec, a preconsolidation pressure of 172 kPa and a coefficient of consolidation of 2.7 x 10-4 cm2/min. The initial effective stress at the midpoint of the layer is 140 kPa, and the soil has a void ratio of 1.01. The stress is increased to 200 kPa. The soil is drained above and below. The total primary consolidation expected is 4.40 cm.

a) How much time in days is required for 2.0 cm of primary settlement to occur?
b) What percentage of consolidation will have occurred after 1 year?  

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