Question: A 3.0 m thick singly drained normally consolidated clay layer has e o = 0.89, C c = 0.46, and c v = 3.5 m

A 3.0 m thick singly drained normally consolidated clay layer has eo = 0.89, Cc = 0.46, and cv = 3.5 m2/year. The effective overburden pressure at the middle of the layer is 105.0 kN/m2. It is proposed to build a large warehouse that is expected to impose a pressure of 50.0 kN/m2 at the ground level.

a. What would the primary consolidation settlement be?

b. If the engineer proposes to preload the site with a pressure of 90.0 kN/m2, how long should this surcharge be left to ensure there is no postconstruction settlement when the warehouse is built?

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