Q3- A 12 m high compacted earth fill is to be constructed using a silty clay borrow material. A series of unconsolidated-undarined (UU) triaxial compression test was performed on compacted specimens of the fill material at an average dry density of 16,5 kN/m and a water content of 19%. These conditions are believed to be representative of what will be achieved for the fill during construction. a) Based on the results of the UU tests, total stress shear strength parameters for the fill are estimated to be c=48 kPa, = 9. What side slopes would you recommend for the earth fill if the factor of safety during and at the end of construction is to be 1.5? b) The pore water pressure in the compacted fill are expected to change with time after construction until eventually at any point in the slope the pore water pressures become (on the average) equal to approximately 20 percent of the total vertical overburden pressure. Effective stress shear strength for the fill are estimated to be c=4,8 kPa, o'= 25. What side slopes would you recommend for the fill if the factor of safety is to always be at least 1.5? You can assume that the total unit weight does not change appreciably over time.