(a) Using the Fellenius method of slices for slope analysis, calculate the factor of safety against a rotational slide for the following conditions: • Slope inclination is 2 horizontal to 1 vertical....

(a) Using the Fellenius method of slices for slope analysis, calculate the factor of safety against a rotational slide for the following conditions:

• Slope inclination is 2 horizontal to 1 vertical.

• Trial failure arc center of rotation is 35 m above slope midpoint; arc passes through toe of slope.

• Slope height is 25 m.

• Soils are uniform to great depth (drained shear tests indicate ɸ = 15, c¿ = 15 Kn/m²
y = 17 kN/m³
table is very deep.

• Use five slices, approximately equal in width.

(b) Calculate the factor of safety for the above conditions but assuming a fully submerged slope (water level even with the top of the slope).