3. Complete this problem. A site is underlain by two layers of normally consolidated clayey sand. The unit weights of the top layer are 19 and 21 kN/m³ and the layer is 6 meters thick. The unit weights of the bottom layer are 20 and 22 kN/m³, and the layer is 8 meters thick. Below the bottom layer lies bedrock. The water table is located 2 meters below the ground surface. The top layer soil has a friction angle of 38 degrees, a cohesion intercept of 20 kPa, and an undrained strength of 160 kPa. The bottom layer soil has a friction angle of 33 degrees, a cohesion intercept of 10 kPa, and an undrained strength of 120 kPa. Point A is located 9 meters underground. All layers have a lateral stress ratio of 0.5. A. Draw the profile neatly, add dimensions, and draw a tree on the ground surface. B. Determine the geostatic vertical effective stress and the geostatic horizontal effective stress at point A. Answers: 118 kPa, 59 kPa C. Draw the Mohr Circle to determine the effective stress that acts at point A on a plane inclined 10 degrees counter-clockwise from the horizontal plane. Answer: -116 kPa
3. Complete this problem. A site is underlain by two layers of normally consolidated clayey sand. The unit weights of the top layer are 19 and 21 kN/m³ and the layer is 6 meters thick. The unit weights of the bottom layer are 20 and 22 kN/m³, and the layer is 8 meters thick. Below the bottom layer lies bedrock. The water table is located 2 meters below the ground surface. The top layer soil has a friction angle of 38 degrees, a cohesion intercept of 20 kPa, and an undrained strength of 160 kPa. The bottom layer soil has a friction angle of 33 degrees, a cohesion intercept of 10 kPa, and an undrained strength of 120 kPa. Point A is located 9 meters underground. All layers have a lateral stress ratio of 0.5. A. Draw the profile neatly, add dimensions, and draw a tree on the ground surface. B. Determine the geostatic vertical effective stress and the geostatic horizontal effective stress at point A. Answers: 118 kPa, 59 kPa C. Draw the Mohr Circle to determine the effective stress that acts at point A on a plane inclined 10 degrees counter-clockwise from the horizontal plane. Answer: -116 kPa
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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I need help solving problem 13 with the base concept of problem 3 as shown in the pictures. Can someone assist me please?
Transcribed Image Text:13. Consider the profile described in problem 3. Draw the Mohr Circle and use it to calculate the
drained strength of the soil at point A on the plane inclined 10 degrees counter-clockwise from
the horizontal plane. Answer: ~85 kPa.
Transcribed Image Text:3. Complete this problem. A site is underlain by two layers of normally consolidated clayey sand.
The unit weights of the top layer are 19 and 21 kN/m³ and the layer is 6 meters thick. The unit
weights of the bottom layer are 20 and 22 kN/m³, and the layer is 8 meters thick. Below the
bottom layer lies bedrock. The water table is located 2 meters below the ground surface. The top
layer soil has a friction angle of 38 degrees, a cohesion intercept of 20 kPa, and an undrained
strength of 160 kPa. The bottom layer soil has a friction angle of 33 degrees, a cohesion intercept
of 10 kPa, and an undrained strength of 120 kPa. Point A is located 9 meters underground. All
layers have a lateral stress ratio of 0.5.
A. Draw the profile neatly, add dimensions, and draw a tree on the ground surface.
B. Determine the geostatic vertical effective stress and the geostatic horizontal effective
stress at point A. Answers: 118 kPa, 59 kPa
C. Draw the Mohr Circle to determine the effective stress that acts at point A on a plane
inclined 10 degrees counter-clockwise from the horizontal plane. Answer: ~116 kPa
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