An infinite slope is shown in Figure 15.49. The shear strength parameters at the interface of soil

Question:

An infinite slope is shown in Figure 15.49. The shear strength parameters at the interface of soil and rock are ( = 26°, and c' = 21 kN/m2. Given: ( = 1950 kg/m3.
a. If H = 5 m and ( = 18°, find the factor of safety against sliding on the rock surface.
b. If ( = 27°, find the height, H, for which Fs = 1.75.