Figure shows a soil profile where a clay layer will consolidate under an embankment loadin...

Figure shows a soil profile where a clay layer will consolidate under an embankment loading of 150 kPa. There is no capillarity. Your firm performed two consolidation tests:

one lest indicated that the soil is overconsolidated, with σ’ρ = 110 kPa.

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one test indicated that the soil is normally consolidated.

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Both tests gave the same Crε and Ccε values, shown in the figure.

(a) Determine the initial σ’u at the middle of the clay layer (i.e., at depth 5.5 m).

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(b) Compute the settlement due to the embankment loading, assuming that the overconsolidated assumption is correct (σ’ρ = 110 kPa).

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(c) Compute the settlement again, this time assuming that the soil is normally consolidated.