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Solution HW#6

# Solution HW#6 - Solution of Homework No.6 CEE 330 Fall...

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Solution of Homework No.6 – CEE 330 – Fall 2009-10 Date: November 5, 2009 Problem 1: The major principal total stress ( σ 1 ) on a specimen is 225 kPa, the minor principal stress ( σ 3 ) is 150kPa, and the pore pressure (u) is 50kPa. (a) Plot the Mohr’s Circle for effective stresses.

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2. An isotropically consolidated undrained triaxial compression (CIUC) test was performed on a 152mm long clay specimen at the in situ vertical effective stress of 75kPa. Processed data for axial displacement, minor principal total stress ( σ 3 ), major principal total stress ( σ 1 ), and pore pressure (u) are included in the spreadsheet (triaxial_data.xls). (a) Plot the Mohr’s circle at failure. Failure is defined as the maximum principal effective stress ratio, σ ' 1 / σ ' 3 , also known as maximum obliquity. When pore pressures are unknown, failure is defined at the maximum principal stress difference ( σ 1 - σ 3 ). For the data in this problem, those points are coincident, and are also the last point in the data set.
(b) Plot the total stress path of s (x-axis) vs. t (y-axis) for the entire test.

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Solution HW#6 - Solution of Homework No.6 CEE 330 Fall...

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