Analytical Chem Soil HW Solutions 76

Analytical Chem Soil HW Solutions 76 - Q5.7 (a) Define the...

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76 Q5.7 (a) Define the triaxial invariant stress parameters p' and q in terms of the principal stresses and the quantities measured in a conventional triaxial test. Two saturated triaxial test samples, each containing 116.3 g of dry clay powder (G s =2.70), were prepared for a shear test by isotropic compression in the triaxial cell. For sample A, the cell pressure was gradually raised from 25 kPa to 174 kPa, with full drainage occurring throughout the process. At 174 kPa, the sample had a diameter of 40 mm and a height of 120 mm. The drainage taps were then closed, the cell pressure was increased to 274 kPa and the sample was subjected to an undrained compression test to failure. The data recorded during consolidation were: Cell pressure, kPa 25 50 75 100 150 174 Pore water pressure, kPa 0 0 0 0 0 0 Volume of water expelled, cm 3 0 22.4 34.47 43.08 56.01 60.31 The data recorded during shear were: Cell pressure, kPa 274 274 274 274 274 274 Pore water pressure, kPa 100 104 114 132 162 189
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This note was uploaded on 12/28/2011 for the course CHM 4302 taught by Professor Stuartchalk during the Fall '11 term at UNF.

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