$2\mathrm{.}1$ Identify the critical soil and$/$or rock parameters required from the geotechnical investigation for the following estimations:

$($a$)$ Estimating the average settlement below a flexible foundation on saturated clay. Refer to the diagramme below.

$($b$)$ Basic pile assessment for a pile socket in rock.Refer to the diagramme below $(3)$

$2\mathrm{.}2$ The nett applied pressure on a foundation $($dimensions are $2,4$ m $1,2$ m $($L $B))$ with a depth of $800$ mm is $150k\frac{N}{m^2}.$ Determine the elastic settlement at the centre of the foundation in a granular soil. Use the following as design inputs:

Poisson's ratio of the soil $=0\mathrm{.}25$

Soil modulus of elasticity $=10\mathrm{.}5$MPa

Shape factor $=0\mathrm{.}65$

Refer to Addendum A for the required graphs and formulas.

$2\mathrm{.}3$ A $6m(L)2m(B)$ foundation with a depth of $0,8m$ is to be constructed on a saturated clay. The depth between the bottom of the foundation and a rigid rock layer is $7$ m $.$ The nett applied load per unit area of the foundation is $180k\frac{N}{m^2}.$ The clay has the following parameters:

Overconsolidation ratio $=3$

Undrained shear strength of the soil $cu=150k\frac{N}{m^2}$

$\frac{?}{PI}=35$ Estimate the elastic settlement of the foundation.

Use the average of the applicable range from Table $1$ to determine the $-$value.

Refer to Addendum A for the required graphs and formulas.