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Problems 39 ist four major factors that influence the internal friction angle of cohesionless soils 7-2 Define soil sensitivity and thixotropy In a direct shear test on a loose sand, a shearing s...
In a direct shear test on a sample of cohesionless sand, the vertical normal stress on...
In a direct shear test on a sample of cohesionless sand, the vertical normal stress on the sample is 300 kPa and the horizontal shear stress at failure is 200 kPa. a) Assuming uniform stress distribution within the failure zone, determine the magnitude and direction of the principal stresses at failure. b) Explain if it is possible to determine the principal stresses in a direct shear sample for an applied horizontal shear stress which is not large enough to cause...
The state of stress within the soil below the ground surface is σ.-28 kPa, σ,-14 kPa,...
The state of stress within the soil below the ground surface is σ.-28 kPa, σ,-14 kPa, and t-4 kPa on the horizontal plane. Using Mohr's circle; a) Find the magnitude and directions of the major and minor principal stresses, that is the plane on which there are no shear stresses. b) If the material is a loose sand with a known friction angle of p-30 degrees and c'-0, construct the Coulomb failure envelope and determine if this soil is in...
soil mechanics Q4:- A sand sample is tested in a direct shear device. The vertical normal...
soil mechanics
Q4:- A sand sample is tested in a direct shear device. The vertical normal stress on the sample is 300 kN/m². The horizontal shear stress at failure is equal to 210 kN/m². a. Compute the angle of internal friction for the sand and the magnitudes of the principal stresses at failure. b. During a consolidated drained triaxial test, a sample of the same sand failed at a principal stress difference of 130 kN/m². Determine the magnitudes of the...
soil mechanics Q2)-A - Calculate the shearing strength along plane at 7 m in coarse sand...
soil mechanics
Q2)-A - Calculate the shearing strength along plane at 7 m in coarse sand soil, the ground water table is at depth of 3 m below the surface.the bulk density of soil above the water table is yo =18.9 kN/m and the saturated density below ground water table is 20.5 kN/m². The angle of internal friction of the sand is 32° - 4m GS 3m Yo = 18.9 kN/m2 V GWT Ysat. = 20.5 kN/m2 o = 32°...
Soil mechanics Q2)-A - Calculate the shearing strength along plane at 7 m in coarse sand...
Soil mechanics
Q2)-A - Calculate the shearing strength along plane at 7 m in coarse sand soil , the ground water table is at depth of 3 m below the surface the bulk density of soil above the water table is Xb=18.9 kN/m3 and the saturated density below ground water table is 20.5 kN/m². The angle of internal friction of the sand is 320 1 GS 3m 1 4 m Yo = 18.9 kN/m2 GWT Ysat. = 20.5 kN/m2 B)...
(10 points) The major and minor principal stresses measured in a soil element are equal to 200 and 100 kPa, respectively. The soil is a dry sand with an internal friction angle of 32 degrees and a co...
(10 points) The major and minor principal stresses measured in a soil element are equal to 200 and 100 kPa, respectively. The soil is a dry sand with an internal friction angle of 32 degrees and a cohesion intercept of zero, when the soil will be loaded, additional compressive stress increments of ơs and ơs/4 will be superimposed on σι and σ, respectively. Determine the maximum possible value of ơs such that the shear strength will not be exceeded in...
A drained direct shear box test was performed on a sample of saturated sand. The normal...
A drained direct shear box test was performed on a sample of saturated sand. The normal effective stress of 467 kPa was constant throughout the test, and the initial sample dimenstions were 60 mm x 60 mm in plan x 30 mm deep. In the vicinity of peak shear stress, the data recorded were: (20 points) Shear Stress, τ (kPa) 42.5 43.1 42.8 Relative horizontal displacement x (mm) 0.30 0.40 0.80 Upward movement of the shear box cap y (mm)...
PART IV SHEAR STRENGTH OF SOILS 38 pts PROBLEM 4.1 a) A triaxial consolidated drained test...
PART IV SHEAR STRENGTH OF SOILS 38 pts PROBLEM 4.1 a) A triaxial consolidated drained test is performed on a NC clay with ?.-700 kPa and uo-200. The additional axial stress applied through the piston during the shear phase is 1130 kPa. What is the angle of internal friction of the clay (assume c'-0)? Draw total and effective stress Mohr circles for pre-shear and failure conditions. Indicate position of failure plane b) A duplicate specimen is tested undrained following identical...
soil 3m 1 1 Q2)-A - Calculate the shearing strength along plane at 7 m in...
soil
3m 1 1 Q2)-A - Calculate the shearing strength along plane at 7 m in coarse sand soil , the ground water table is at depth of 3 m below the surface .the bulk density of soil above the water table is Yo=18.9 kN/m3 and the saturated density below ground water table is 20.5 kN/m². The angle of internal friction of the sand is 32° GS Yo = 18.9 kN/m3 GWT Ysat. = 20.5 kN/m B) A Q =...
Following data are given for a direct shear test conducted on dry sility sand: Specimen dimensions:...
Following data are given for a direct shear test conducted on dry sility sand: Specimen dimensions: diameter 71 mm; height 25 mm Normal stress: 150 kN/m2 Shear force at failure: 276 N a. Determine the angle of friction, ф. b. For a normal stress of 200 kN/m2, what shear force is required to cause failure? Das Problem 12.1 Also draw the Mohr's circle at failure. (c) What are the principal stresses at failure? (d) What is the inclination of the...
In a direct shear test on a sample of cohesionless sand, the vertical normal stress on the sample is 300 kPa and the horizontal shear stress at failure is 200 kPa. a) Assuming uniform stress distribution within the failure zone, determine the magnitude and direction of the principal stresses at failure. b) Explain if it is possible to determine the principal stresses in a direct shear sample for an applied horizontal shear stress which is not large enough to cause...
The state of stress within the soil below the ground surface is σ.-28 kPa, σ,-14 kPa, and t-4 kPa on the horizontal plane. Using Mohr's circle; a) Find the magnitude and directions of the major and minor principal stresses, that is the plane on which there are no shear stresses. b) If the material is a loose sand with a known friction angle of p-30 degrees and c'-0, construct the Coulomb failure envelope and determine if this soil is in...
soil mechanics
Q4:- A sand sample is tested in a direct shear device. The vertical normal stress on the sample is 300 kN/m². The horizontal shear stress at failure is equal to 210 kN/m². a. Compute the angle of internal friction for the sand and the magnitudes of the principal stresses at failure. b. During a consolidated drained triaxial test, a sample of the same sand failed at a principal stress difference of 130 kN/m². Determine the magnitudes of the...
soil mechanics
Q2)-A - Calculate the shearing strength along plane at 7 m in coarse sand soil, the ground water table is at depth of 3 m below the surface.the bulk density of soil above the water table is yo =18.9 kN/m and the saturated density below ground water table is 20.5 kN/m². The angle of internal friction of the sand is 32° - 4m GS 3m Yo = 18.9 kN/m2 V GWT Ysat. = 20.5 kN/m2 o = 32°...
Soil mechanics
Q2)-A - Calculate the shearing strength along plane at 7 m in coarse sand soil , the ground water table is at depth of 3 m below the surface the bulk density of soil above the water table is Xb=18.9 kN/m3 and the saturated density below ground water table is 20.5 kN/m². The angle of internal friction of the sand is 320 1 GS 3m 1 4 m Yo = 18.9 kN/m2 GWT Ysat. = 20.5 kN/m2 B)...
(10 points) The major and minor principal stresses measured in a soil element are equal to 200 and 100 kPa, respectively. The soil is a dry sand with an internal friction angle of 32 degrees and a cohesion intercept of zero, when the soil will be loaded, additional compressive stress increments of ơs and ơs/4 will be superimposed on σι and σ, respectively. Determine the maximum possible value of ơs such that the shear strength will not be exceeded in...
PART IV SHEAR STRENGTH OF SOILS 38 pts PROBLEM 4.1 a) A triaxial consolidated drained test is performed on a NC clay with ?.-700 kPa and uo-200. The additional axial stress applied through the piston during the shear phase is 1130 kPa. What is the angle of internal friction of the clay (assume c'-0)? Draw total and effective stress Mohr circles for pre-shear and failure conditions. Indicate position of failure plane b) A duplicate specimen is tested undrained following identical...
soil
3m 1 1 Q2)-A - Calculate the shearing strength along plane at 7 m in coarse sand soil , the ground water table is at depth of 3 m below the surface .the bulk density of soil above the water table is Yo=18.9 kN/m3 and the saturated density below ground water table is 20.5 kN/m². The angle of internal friction of the sand is 32° GS Yo = 18.9 kN/m3 GWT Ysat. = 20.5 kN/m B) A Q =...
Following data are given for a direct shear test conducted on dry sility sand: Specimen dimensions: diameter 71 mm; height 25 mm Normal stress: 150 kN/m2 Shear force at failure: 276 N a. Determine the angle of friction, ф. b. For a normal stress of 200 kN/m2, what shear force is required to cause failure? Das Problem 12.1 Also draw the Mohr's circle at failure. (c) What are the principal stresses at failure? (d) What is the inclination of the...
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