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Consider a 20 foot thick saturated clay that has a sand layer above it and an...

Consider a 20 foot thick saturated clay that has a sand layer above it and an impermeable rock layer below it. The clay layer has an initial effective stress at its midpoint of 3145 lbs/ft2.    Due to the presence of a large water tank on the surface, the stress is increased by 710 lbs/ft2 at the midpoint of the clay layer. How much total settlement from primary consolidation is expected? Provide your answer in inches.

Soil properties: Compression index = .324, Swell index = .05, initial void ratio = 1.125, consolidation coefficient = 0.02 in2/min, preconsolidation pressure = 4500 lb/ft2.

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