For the RC retaining wall given in the figure belowa) Calculate the required extent of the base slab forward the back of the wall such that a factor of safety of 2.0 against overturning is met.b) Subsequently check if the required minimum factor of safety of 1.5 is met against base sliding. Ifnot, design a base key. Calculate the passive pressure starting from the bottom level of the base slab. Alsouse 2H3 of the shear strength parameters of the base soil in calculations and apply a FS 2.0 for thepassive resistance. ¢=25°3“3:1 7 kN/m 10 ‘ Base soil (silt clay) 3c=65 kPa, ¢=35’, 7:20 kNJ’m


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