Recompute factor of safety against sliding at Point A based on the underlying soil being clay. Still assume that the shear stress at point A is 400 psf.

EXAMPLE PROBLEM 3 ! Levee Sand y = 119 lb/ft³ y = 125 lb/ft³ Potential shear surface 9 ft 22 ft 15 ft River A Friction angle = 34 degrees Compute factor of safety against sliding at Point A. Assume that the shear stress at point A is 400 psf. 24

Civil Engineering A multistory building with a basement is to be constructed. The top 4 m consists of loose silt, below which dense sand layer is present up to a great depth. Ground water table is at the surface. The foundation consist of the basement slab of 6m width which will rest on the top of dense sand as shown in the figure. For dense sand, saturated unit weight = 20 kN/m³, and bearing capacity factors Na 40 and Ng = 45. For loose silt, saturated unit weight = 18 kN/m³, Ng = 15 and Ng = 20. Effective cohesion c ¢ is zero for both soils. Unit weight of water is 9.81 kN/m³. Neglect shape factor and depth factor. Average elastic modulus E and Poisson's ratio m of dense sand is 60 x 103 kN/m2 and 0.3 respectively. 17 Ground surface XXX Loose silt 4 m Basement Foundation slab 6 m Dense sand Loose silt The foundation slab is subjected to vertical downward stresses equal to net safe bearing capacity derive in the above question. Using influence factor If = 2.0, and neglecting embedment…

For the above soil profile, determine the shear strength at Point B.

Answer in three decimal places please