E N D
CLASSWORK…. USE YOUR BRAIN……. 1.Find the factor of safety of a slope of infinite extent having a slope angle = 25°. The slope is made of cohesionless soil with phi = 30°. 2.Find the critical height of an infinite slope having a slope angle of 30°. The slope is made of stiff clay having a cohesion 20 kN/m2 , angle of internal friction 20°, void ratio 0.7 and specific gravity 2.7. Consider the following cases for the analysis. (a) the soil is dry. (b) the water seeps parallel to the surface of the slope. (c) the slope is submerged. 3.An infinite slope has an inclination of 26° with the horizontal. It is underlain by a firm cohesive soil having Gs = 2.72 and e = 0.52. There is a thin weak layer 20 ft below and parallel to the slope (c' - 525 lb/ft2 , phi' = 16°). Compute the factors of safety when (a) the slope is dry, and (b) ground water flows parallel to the slope at the slope level.