Analytical Chem Soil HW Solutions 23

# Analytical Chem Soil HW Solutions 23 - 0.5 'v.tan which...

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23 0.5 × σ ' v .tan δ which increases linearly from zero at the top of the pile to 0.5 × [(18 kN/m 3 20 m) - (9.81 kN/m 3 20 m)] tan20 ° = 29.81 kPa at the base Hence T = [(0 + 29.81 kPa) ÷ 2] [( π × 0.5 m) 20 m] = 468 kN Stress analysis and interpretation of shearbox test data Q2.7 A drained shearbox test was carried out on a sample of saturated sand. The normal effective stress of 41.67 kPa was constant throughout the test, and the initial sample dimensions were 60 mm × 60 mm on plan × 30 mm deep). In the vicinity of the peak shear stress, the data recorded were: Shear stress τ , kPa 42.5 43.1 42.8 relative horizontal displacement x, mm 0.30 0.40 0.80 upward movement of shearbox lid y, mm 0.05 0.075 0.105 (a) Draw the Mohr circle of stress for the soil sample when the shear stress is a maximum, stating the assumption that you need to make. Determine φ ' peak , and the orientations of the planes of maximum stress ratio ( τ / σ ') max . Draw the Mohr circle of strain increment leading
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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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