7. A soil profile consisting of three layers is shown in the figure. Calculate the values of the total stress, effective stress ad pore water pressure at points A, B, C, and D for the following cases. In each case, plot the variations with depth. Characteristics of layers 1, 2, and 3 for each case are given below:

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1. Given the figure below plot the pore pressure, total stress and effective stress at the top, bottom and midpoint of each soil layer, provide a plot with all umerical values of depth and stress in tabular form and on a depth v stress plot. Oft Sand Vmoist = 122 pcf Ysat = 151 pcf I 12ft 30ft Clay Ysat = 144 pcf %3D 70ft Sand Ysat = 128 pcf 120ft

5-4 For the given soil profile and the piezometric surfaces measured at the top of the two sand and gravel layers, determine the pore pressure and effective stress at points A, B, C, D, and E. Piezometers 2 m Ground surface 2 m Sand y = 18 kN/m3 Water table y_ 11m Y = 20 kN/m3 A 4 m Clay Y = 18 kN/m3 加。B 1Im 5 m Sand and gravel y = 22 kN/m3 2 m •D 5 m Clay Y = 19 kN/m3 Sand and gravel y = 23 kN/m3 %3D Cpyright by