Soil borings made at a site near Chicago indicate that the top 6m are loose sand and miscellaneous fill, with the ground water table at 3m below the ground surface. Below this is a fairly soft blue-gray silty clay with an average water content of 30 %. The boring was terminated at 16 m below the ground surface when a fairly stiff silty clay was encountered. Draw the above soil profile. Make reasonable soil unit weight assumptions (include them in your drawing) for each layer described above and then complete the following: a) Assume pore water pressure is zero above ground water table, plot the values of effective stress with depth, show the total stress and pore water pressures profiles used. b) Provide in tabular form the following values: total and effective vertical stresses and pore pressure (u) for the following depths: 1, 3, 6, 11 and 16 m. c) Assume the capillary creates negative pore water pressure above the ground water table (i.e., vadose zone), assume d10 of the loose sand is 0.05 mm. calculate the height of capillary rise, then plot the values of effective stress with depth, show the total stress and pore water pressures profiles used. d) given the condition in c), provide in tabular form the following values: total and effective vertical stresses and pore pressure (u) for the following depths: 1, 3, 6, 11 and 16 m.
Soil borings made at a site near Chicago indicate that the top 6m are loose sand and miscellaneous fill, with the ground water table at 3m below the ground surface. Below this is a fairly soft blue-gray silty clay with an average water content of 30 %. The boring was terminated at 16 m below the ground surface when a fairly stiff silty clay was encountered. Draw the above soil profile. Make reasonable soil unit weight assumptions (include them in your drawing) for each layer described above and then complete the following:
a) Assume pore water pressure is zero above ground water table, plot the values of effective stress with depth, show the total stress and pore water pressures profiles used.
b) Provide in tabular form the following values: total and effective vertical stresses and pore pressure (u) for the following depths: 1, 3, 6, 11 and 16 m.
c) Assume the capillary creates negative pore water pressure above the ground water table (i.e., vadose zone), assume d10 of the loose sand is 0.05 mm. calculate the height of capillary rise, then plot the values of effective stress with depth, show the total stress and pore water pressures profiles used.
d) given the condition in c), provide in tabular form the following values: total and effective vertical stresses and pore pressure (u) for the following depths: 1, 3, 6, 11 and 16 m.
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