Question

A cut is to be made in a soil having a unit weight of 110pcf, c=550psf and Φ=19°. The slide of the cut slope will make an angle of 45° with the horizontal. Use factor of safety of 3.
a) Which of the following most nearly gives the critical angle which the most probable failure will occur?
a. 21.33° c. 32.00°
b. 25.6° d. 25.77°

b) Which of the following most nearly gives the maximum safe depth of the cut, feet?
a. 44.04 c. 132.12
b. 21.59 d. 33.99

c) If instead of factor of safety of 3, which of the following most nearly gives the critical angle which the most probable failure will occur if the factor of safety is 2.5.
a. 21.33° c. 25.77°
b. 28.60° d. 26.42°

Answer 1

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