A retaining wall is to be constructed shown below. It has the following information: Soil Parameters Retaining Wall Specifications 1- 30 degrees Y1= 18 kPa W 0.4 m b,- 1.6 m bz = 1.2 m by - 0.7 m t- 0.3 m D- 16 m 2- 28 degrees Y2- 17 kPa a- 28 degrees Va- 20 kPa - 15 kPa H 4.5 m Veorcrete 23.58 kN/m 6- 2/34 H. Figure 1 Determine 1) Ka 2) Determine the Coulomb active force per unit length of the wall, Pa kN/m 3) Overturning moment (Mo) at the toe kN- m/m

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2' 20' E D 5' 15' A Sand, y=110 lb/ft³, 0=32° B Sand, Ysat=125 lb/ft³, '=32° C What is the equivalent passive soil force (per lineal foot of wall) on the retaining wall? O A338 lb/ft B. 76 lb/ft O C. 806 lb/ft O D.408 lb/ft 10'

a. For the vertical wall shown (no GWT, no interface friction), determine and plot the Ko, active, and passive lateral stress distributions acting on the wall b.Suppose the groundwater table in Problem 1 rises to a depth of 4m below the surface (on both sides or the wall) and assume the wall Is under active loading conditions. Assume that soil above the groundwater table Is dry, and that Y sat = 20 kN/m° • Determine and plot the water pressure and at-rest lateral earth pressure acting on the wall. Show the pressure distributions separately (not combined into one distribution). wall.

13. Provide a detailed step by step solution.