A normally consolidated clay layer 3.24 m. thick has a void ratio of 1.09. Liquid limit is equal to 35 and the average effective stress on the clay layer was 82 kPa. The average stress on it is increased to 115 kPa. as result of the construction of a foundation. Compute the consolidation settlement in millimeters that the clay undergo.

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Consolidation parameters

Consolidation is the process of expulsion of pore water present in the voids of soil solids under the pressure of the applied load. This is a quick process in the case of coarse-grained soils since the permeability is high due to the presence of more voids, while it is a slow and gradual process in the case of clayey soil as the permeability of clay is less. An example of consolidation is the settlement of soil under a building due to the load coming from the building.