Question $1[10$ Marks$]$

The following theory questions will be marked negatively,

$1\mathrm{.}1.$ What is the difference between primary and secondary consolidation?

$1\mathrm{.}2.$ What is the main limitation of Terzaghi's consolidation theory?

$1\mathrm{.}3.$ What can be the causes of expansion in overconsolidated clay $($name three

conditions$)$

Question $2[33$ Marks$]$

A $36m$ clay layer in inter$-$bedded with a continuous sand lens at $12m$ below ground

surface that acts as a drainage layer. The bottom clay is underlain by impervious rock.

The thickness of the sand layer is insignificant.

$2\mathrm{.}1$ How high will the water level rise above the ground surface $(H)$ in the

piezometer, installed at $A,18$ months after the addition of the evenly distributed

pressure of $120$kPa at the surface.

$2\mathrm{.}2$ What would $H$ be after $200mm$ settlement in the bottom clay layer?