$($Use the image and assit with the questions$)$Question $2$

Soil samples collected and examined in the XYZ laboratories are shown in Table Q$2.$

Since it was presumed that the samples were "undisturbed," a number of undrained

triaxial tests were performed on them, and the following parameters were measured:

Table Q$2$

$2\mathrm{.}1.$ Draw the failure envelope in terms of total stress

$2\mathrm{.}2$ Determine the Coulomb equation for the shear strength of the soil in terms of

total stresses. Also determine internal angel of friction and cohesion.

$2\mathrm{.}3.$ Draw the failure envelope in terms of effective stress

$2\mathrm{.}4$ Determine the Coulomb equation for the shear strength of the soil in terms of

effective stresses. Also determine internal angel of friction and cohesion

Hint: Draw neatly and show all your calculations to earn full marks

Question $2$

Soil samples collected and examined in the XYZ laboratories are shown in Table Q$2.$ Since it was presumed that the samples were "undisturbed," a number of undrained triaxial tests were performed on them, and the following parameters were measured: Cell pressure $($kPa$)$ Pore$-$water pressure $($kPa$)$ Axial load at failure $($N$)$ Vertical deformation $($mm$)200100349,915,3$

$400$

$125$

$471,09$

$6,1600150577,566,9$

Table Q$2$

$2\mathrm{.}1.$ Draw the failure envelope in terms of total stress $(5)$

$2\mathrm{.}2$ Determine the Coulomb equation for the shear strength of the soil in terms of total stresses. Also determine internal angel of friction and cohesion. $(15)$

$2\mathrm{.}3.$ Draw the failure envelope in terms of effective stress $(5)$

$2\mathrm{.}4$ Determine the Coulomb equation for the shear strength of the soil in terms of effective stresses. Also determine internal angel of friction and cohesion $(15)$

Hint: Draw neatly and show all your calculations to earn full marks