A cohesionless soil sample was consolidated in the triaxial chamber under a chamber pressure 03. At...

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A cohesionless soil sample was consolidated in the triaxial chamber under a chamber pressure 03. At the end of consolidation, the drain valve is closed and the chamber pressure remained constant while the effort diverter gradually increased until reaching failure in the sample; at that time the following results were obtained (0₁-03) = 103Y (0₁ +03) = 1²/03 Show that p' = 30°, that the pore pressure at the time that fail sample equals 2/3 03 and that the Skempton parameter A is equal to 1. Show also that if the sample fails while the valve is open drain, the following results are obtained at the time of rupture (0₁ - 03) = 03 Y 1⁄2 (0₁ + 0₂) = 203 A cohesionless soil sample was consolidated in the triaxial chamber under a chamber pressure 03. At the end of consolidation, the drain valve is closed and the chamber pressure remained constant while the effort diverter gradually increased until reaching failure in the sample; at that time the following results were obtained (0₁-03) = 103Y (0₁ +03) = 1²/03 Show that p' = 30°, that the pore pressure at the time that fail sample equals 2/3 03 and that the Skempton parameter A is equal to 1. Show also that if the sample fails while the valve is open drain, the following results are obtained at the time of rupture (0₁ - 03) = 03 Y 1⁄2 (0₁ + 0₂) = 203