A soil profile consists of 6 m of coarse sand overlying 12 m of firm clay. Below the clay there is a 9m thick gravel layer. The sand is estimated to have an average dry density of 1.65 Mg/m3 over its full thickness. The clay has a dry density of 1.40 Mg/m³, and to be saturated below the water table an average saturated density of 1.85 Mg/m3 over its full thickness. The average saturated density of gravel is 2.3 Mg/m³ over its full thickness. 2) c) Assuming that the ground water table drops 4 m after a heavy drought, draw the profile with the properties of the soil and the water table d) Compute the op, Op, u at the base of the gravel layer. e) Comment on how the effective stress would change if the water table drops after a heavy drought?
A soil profile consists of 6 m of coarse sand overlying 12 m of firm clay. Below the clay there is a 9m thick gravel layer. The sand is estimated to have an average dry density of 1.65 Mg/m3 over its full thickness. The clay has a dry density of 1.40 Mg/m³, and to be saturated below the water table an average saturated density of 1.85 Mg/m3 over its full thickness. The average saturated density of gravel is 2.3 Mg/m³ over its full thickness. 2) c) Assuming that the ground water table drops 4 m after a heavy drought, draw the profile with the properties of the soil and the water table d) Compute the op, Op, u at the base of the gravel layer. e) Comment on how the effective stress would change if the water table drops after a heavy drought?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A soil profile consists of 6 m of coarse sand overlying 12 m of firm clay. Below the clay
there is a 9m thick gravel layer. The sand is estimated to have an average dry density of
1.65 Mg/m³ over its full thickness. The clay has a dry density of 1.40 Mg/m2, and to be
saturated below the water table an average saturated density of 1.85 Mg/m³ over its full
thickness. The average saturated density of gravel is 2.3 Mg/m³ over its full thickness.
2)
c) Assuming that the ground water table drops 4 m after a heavy drought, draw the
profile with the properties of the soil and the water table
d) Compute the op, Oy, u at the base of the gravel layer.
e) Comment on how the effective stress would change if the water table drops after a
heavy drought?
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