Answered: 4. A site is underlain by a normally…

4. A site is underlain by a normally consolidated, saturated soil layer with thickness = 8m. The layer rests on bedrock. The lateral stress ratio of the soil is 0.5. Calculate the friction angle.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question 13 A 16-m thick soil has water table 5 m. below the ground surface. The soil has a void ratio of 0.49 and specific gravity of 2.67. Above the water table, the soil has a degree of saturation equal to 45.11%. Direct shear test conducted on the soil shows that the an angle of internal friction of 29.53° and cohesion of 16.13 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 8 m. below the ground surface? Round off to two decimal places.
3. A site is underlain by two soil layers over bedrock. The unit weights of the top (sand) layer are 19 and 21 kN/m3 and the layer is 6 meters thick. The unit weights of the bottom (clay) layer are 20 and 22 kN/m³, and the layer is 8 meters thick. The water table is located 2 meters below the ground surface. The lateral stress ratio of the sand layer is 0.4 and that of the clay layer is 0.5. Determine the effective stress and the shear stress at point A, on a plane oriented 12 degrees clockwise from the horizontal. Use a compass to draw the Mohr Circle neatly. Note: point A is located at a depth of 10m. 5. Consider the profile in problem 3 (above) and draw the plane (in the field; denote the plane's angle of orientation) on which the magnitude of the effective stress is 60% of the magnitude of the vertical effective stress. The lateral stress ratio of the sand layer is 0.4 and that of the clay layer is 0.5. Use a compass to draw the Mohr Circle neatly.
A 15-m thick soil has water table 5 m. below the ground surface. The soil has a void ratio of 0.51 and specific gravity of 2.65. Above the water table, the soil has a degree of saturation equal to 44.4%. Direct shear test conducted on the soil shows that the an angle of internal friction of 27.45° and cohesion of 16.26 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 8 m. below the ground surface? Use stored value. Answer in 5 decimal places.
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A stratified soil is to be analyzed for stresses. The stratified soil is composed of sand, silt, clay and gravel. The 2.80-m thick gravel underlays the 3.60-m thick clay while the 4.0-m thick sand which overlays the 3.0-m thick silt is overlain by the gravel. Ground water table is at a depth of 8.0-m from the surface of the stratified soil. Soils above GWT are dry. Use the given soil properties below, draw the complete soil profile and perform the following requirements: For sand: Yd = 16.35 kN/m³, Ysat = 19.62 kN/m³ For silt: Yd = 19.35 kN/m³, Ysat = 22.22 kN/m³ For clay: Yd = 17.35 kN/m³, Ysat = 20.82 kN/m³ For gravel: Yd = 18.35 kN/m³, Ysat = 21.52 kN/m³ Note for 1a, 1b, 1c, and 1d that there is no capillary rise in the soils. Draw completely the soil profile. 1a. Effective stress at the middle of the sand 1b. Effective stress at the middle of the silt 1c. Effective stress at the middle of the clay 1d. effective stress at the middle of the gravel
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A 18-m thick soil has a water table 5m below the ground surface. The soil has a void ratio of 0.59 and specific gravity of 2.69. Above the water table, the soil has a degree of saturation equal to 47.05%. Direct shear test conducted on the soil shows that the an angle of internal friction of 26.11 degrees and cohesion of 16.63 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 9m below the ground surface?
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A 19-mm thick soil has water table 5m. below the ground surface. The soil has a void ratio of 0.55 and specific gravity of 2.63. Above the water table, the soil has a degree of saturation equal to 44.53%. Direct shear test conducted on the soil shows that the an angle of internal friction of 27.48° and cohesion of 16.27 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 9m. below the ground surface?
A 16-m thick soil has a water table 4 m. below the ground surface. The soil has a void ratio of 0.42 and specific gravity of 2.62. Above the water table, the soil has a degree of saturation equal to 49.96%. Direct shear test conducted on the soils shows that the an angle of internal friction of 24.25 degrees and cohesion of 15.13 kPa. What is the potential shear strength (in kPa) on a forizontal plane at a deptj of 8m. below the ground surface?