3. Following results are obtained in a series of CU triaxial tests on saturated samples of a clay. Test number 1 2 3 Con

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3 Following Results Are Obtained In A Series Of Cu Triaxial Tests On Saturated Samples Of A Clay Test Number 1 2 3 Con 1 (57.55 KiB) Viewed 53 times

3. Following results are obtained in a series of CU triaxial tests on saturated samples of a clay. Test number 1 2 3 Confining (cell) Pressure (kPa) 350 500 500 Deviator stress (01-03) at failure (kPa) 120 210 270 Pore pressure before shear (kPa) 250 300 200 Pore water pressure at failure (kPa) 270 360 185 a) Calculate the effective shear strength parameters (c' and ') and plotting the Mohr- Coulomb failure envelope. Use modified strength envelope through top points of the circles. b) If we carry out a consolidated drained triaxial test on a specimen taken from the same clay (assume same c', '), what would be the deviator force at failure in a specimen that is consolidated under an isotropic effective stress of 240 kPa and pore pressure of 300 kPa. At the end of consolidation (i.e., start of shear), the specimen was 35 mm in diameter and 70 mm in height. Peak strength (i.e., failure) is reached at axial strain of 4% and volumetric strain of 2% in compression.