What would your advice be to the client?

a) With the aid of Mohr circles detennine earth pressure coefficients for the active (Ka) and passive (Kp) sides of the wall. (Full marks will be awarded for properly annotated Mohr circles showing stress conditions for each zone (zone 1 and zone 2) and correct rotations of principal stresses between the respective zones.
[15 marks]
b) Based on your answers given in Part A, determine the Factor of Safety (for moment equilibnum) against failure of the retaining wall given the geometry of the wall and the current water profile as highlighted in Figure 2. Note: as this is a cantilevered wall the pivot would be up some distance from the base of the wall.
[15 marks]
c) Due to the low permeability in the soil, draining the canal would not reduce the water table in the retained soil. What would be the new factor of safety be and what would your advice be to the client?
1111 marks]

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