For a soil section, which was given in the figure, the ground water table was drawn down 2 m from the ground surface level. The results of the consolidation test performed at the laboratory conditions are given in the table. 45 minutes was elapsed to achieve the 70% of the settlement at the laboratory for the same stress level. The height of the sample is 20 mm. Calculate the total consolidation settlement of the clay layer and the time needed to achieve the 70% of the settlement. Stress Level p (kN/m) Mc Silty Sand Yo= 18.0 kN/m 2.0m (kN/m) 25-50 3150 Y19.5 kN/m 1.0 m 50-100 3260 Clay 100-200 3970 y= 17.5 kN/m 7.0 m 200-400 4920 400-800 7930 Clayey Gravel U (%) 10 20 30 40 50 60 70 80 90 95 Time factor 0.008 0.031 0.071 0.126 0.197 0.287 0.403 0.567 0.848 1.163 Ty