A $4\mathrm{.}0m$ thick fill is to be made of a soil with a Proctor maximum dry unit weight of $19\mathrm{.}4$

$k\frac{N}{m^3}$ and an optimum moisture content of $13\mathrm{.}0\%.$ This fill will be compacted at optimum moisture content

to an average relative compaction of $92\%.$ The underlying soils are as shown in the figure below.

Consolidation tests were performed at Points A

and $B,$ with the following results:

$($a$)$ Are the soft clay $($CL$)$ and medium clay

$(CH)$ layers normally$-$consolidated or

overconsolidated?

$($b$)$ Only considering the $CL$ and $CH$ layers,

determine the ultimate consolidation

settlement due to the weight of this fill.

Use approximately the same layer

thickness in your calculations $($thus$,$ divide

the CL layer into two$-3m$ thick sublayers