An undrained triaxial compression strength test was conducted on clayey silt soils and the following test results are obatined.

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written 5.8 years ago by

teamques10 ★ 68k

modified 2.6 years ago by

Chandan15 • 300

$\sigma_{3}kN/m^{2}$	17	44	56
$\sigma_{1}kN/m^{2}$	157	204	225
$U kN/m^{2}$	12	20	22

Draw the associated Mohr's circles and determine the values of the shear parameters considering the (a) total stress and (b) effective stresses.

advanced geotechnical engineering

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written 2.6 years ago by

Chandan15 • 300

• modified 2.6 years ago

Mohr Circle

Total Stress

For a solution with total stresses, draw Mohr circles C 1 ,C 2 and C 3 for each of the specimens using the corresponding principal stresses σ 1 and σ 3 .
Draw a Mohr envelope tangent to these circles as shown in Fig.Now from the figure Hence,
C=48kN/m^2 ; phi = 15°.

Effective Stress Parameters

The effective principal stresses may be found by subtracting the pore pressures u from the total principal stresses as given below.
As before draw Mohr circles C'1 ,C'2 and C'3 for each of the specimens as shown in Fig.
C'=46kN/m^2 and Phi'=20°.

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