CEEN 641 – ADVANCED SOIL MECHANICS
HOMEWORK ASSIGNMENT #11
1.
As presented in the previous homework assignment, two isotropically consolidated
undrained triaxial shear tests with pore pressure measurements (CUPP) were conducted on
samples of remolded clay.
The consolidation pressures were 1440 and 2880 psf.
Using the
axial strain, deviator, and pore pressure data in the attached spreadsheet file:
a.
Develop a single plot showing q vs. p and q vs. p’ for each test in its entirety.
Plot axes
to approximately the same scale.
(Note that the resulting lines are total and effective
stress paths, respectively).
b.
Identify the K
f
line.
c.
Determine MohrCoulomb shear strength parameters in terms of both total and effective
stresses using pq and p’q values.
(When doing this, consider your answers from the
previous homework assignment).
d.
Discuss the behavior illustrated by the stress paths shown on the plot (i.e., describe why
the total and effective stress paths (TSP and ESP) are shaped as they are).
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 Fall '10
 TravisGerber
 Force, Triaxial shear test, A. Draw Mohr, direct shear test, previous homework assignment

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