5. A consolidated undrained (CU) test on a saturated clay yielded the following results: (24%) After isotropic consolida

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5 A Consolidated Undrained Cu Test On A Saturated Clay Yielded The Following Results 24 After Isotropic Consolida 1 (52.21 KiB) Viewed 30 times

5. A consolidated undrained (CU) test on a saturated clay yielded the following results: (24%) After isotropic consolidation: chamber confining pressure 03 = 100 kPa. (Ignore the backpressure.) At failure: 03 = 100 kPa, u = 50 kPa, deviator stress Aod=85 kPa. (a) Assume cu =0, determine the friction angle ou. (b) Assume c'=0, determine the friction angle '. (c) Determine the direction of failure plane relative to the direction of minor principle stress. (d) Determine the Skempton's pore water pressure parameter ₁. (e) According to the test results, is this a normally consolidated, lightly overconsolidated, or a heavily overconsolidated clay? Why? (f) What would be the undrained shear strength of the soil if it is under a total confining stress of 200 kPa.