A 10 m thick clay layer is resting over a 3 m thick sand layer and is submerged. A fill of 2 m thick sand with unit weight of 20
kN/m3 is placed above the clay layer to accelerate the rate of consolidation of the clay layer. Coefficient of consolidation of clay is
9×10−2m2/year and coefficient of volume compressibility of clay is
2.2×10−4m2/kN. Assume Taylor's relations between time factor and average degree of consolidation.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1193331/original_26.png)
The settlement (in mm, round off to two decimal places) of the clay layer, 10 years after the construction of the fill, is
- 18.83