Use Taylor stability charts for the total stress condition for the following: (a) Determine the factor of safety for a planned 30-ft-high slope in clay soil (unit weight of 110 pcf, cohesion of 700...

Use Taylor stability charts for the total stress condition for the following:

(a) Determine the factor of safety for a planned 30-ft-high slope in clay soil (unit weight of 110 pcf, cohesion of 700 psf, zero angle of internal friction). The slope inclination is 1 horizontal to 1 vertical. A stratum of very firm hard clay exists 15 ft below the toe elevation for the slope.

(b) What would the factor of safety become if the soil slope was made at an inclination of 60°?