Example: A series of conventional consolidated-undrained triaxial compression tests carried out on undisturbed sam- ples of a saturated clay gave the following results: Test Cell consolidation Deviator stress at failure Pore No pressure at failure (КРа) 85.2 pressure 01 - 03 (КPa) 305.3 03 (kPa) 200 300 469.5 126.4 400 615.7 184.7 Calculate the effective and total stress shear strength parameters of this soil. 123

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Borings indicate that at a Queens, NY site, the top 6 meters is a loose 2) , sand with a groundwater level at 3 meters below the ground surface. Below the sand is a 10 meter thick soft clay stratum. Assume sand unit weights are ymoist = 14 kN/cubic meter and ysat = 15 kN/cubic meter. Assume clay ysat = 19 kN/cubic meter. Calculate total, pore and effective stresses at 3, 12 and 16 meters deep.

a. A shear box test carried out on a soil sample gave the following results ✓ Vertical load [kg] 36.8 73.6 110.4 147.2 Gauge reading for proving 16 26 35 44 (shearing) ring [μm] If the shear box is 60 mm square and the proving ring constant/factor is 20 N/μm, determine the apparent cohesion and angle of internal friction for this soil. HINT: Determine normal stress from vertical load readings and shear stress from proving ring readings