ī 3 m 3 m Ground water table Y с '= 30° 0 16 kN/m = 18 kN/m³ = 35° sak c=0 Z For the retaining wall shown above calculate the following: A) Calculate the value of K (for either the 'active' or 'passive' earth pressure - whichever is appropriate! ...you decide). B) Calculate and sketch the pressure distribution on the 'back' side (soil side) of the retaining wall (show all of the relevant pressure distributions and indicate the magnitude of the distributions on the sketch). Indicate the correct units! C) Calculate the resultant horizontal force for each pressure distribution and calculate the total overturning moment about the base of the wall. Show the forces in the correct units! D) If this wall has a 'depth' (in-and-out of the 'page') of 20-m, what is the total horizontal force applied to the wall? How much total friction force is needed between the base of the wall and the soil to provide a Factor of Safety of 2.0 against 'sliding'.

Retaining wall.

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1. The following is a sketch of the proposed embankment, calculate the addition of vertical stress (Bousinesq method / graph below) at the depths of points A and B. Assume the unit weight of the soil stockpile = 20 kN / m3. 2. Calculate the added vertical stress at points A and B as deep as Z = 8 m, under the rectangular load