Question $8$

$[9$ marks$]$

The following two tables report results from two drained shear box tests carried out on undisturbed

$($identical$)$ soil samples. The cross$-$sectional area of the box was $3400m{m}^2.$

For a normal load of $0\mathrm{.}2kN$ :

For a normal load of $0\mathrm{.}8kN$ :

Page $4$ of $5$

Determine:

a$)$ What was the maximum pore water pressure measured during both tests?

b$)$ What was the normal stress generated by the normal load of $0\mathrm{.}2kN?$

c$)$ What was the normal stress generated by the normal load of $0\mathrm{.}8kN?$

d$)$ What was the maximum shear stress resisted by the soil when the normal load of $0\mathrm{.}2kN$ was

acting?

e$)$ What was the maximum shear stress resisted by the soil when the normal load of $0\mathrm{.}8kN$ was

acting?

f$)$ What is the effective friction of angle?

g$)$ What is the effective cohesion?