a. A shear vane test, done on a deposit of soft alluvial clay required a torque of 67.5 Nm. The dimensions of the vane were: D = 75 mm; H= 150 mm. What is the value for the undrained %3D shear strength of this clay soil?. 160 KN lun?
Q: 3. An earth embankment is shown in Figure 3.48. Determine the stress increase at point B due to the…
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Q: An embankment consists of clay fill for which c=25 kPa and angle of internal friction is 260 (from…
A: Given Data: c=25 kPa Angle of internal friction=260 Weight of fill per unit volume=18.64 kN/m3…
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Q: subject : Geotechnical Design Book : PRINCIPLE OF FOUNDATION ENGINEERING
A: q =γ H = 17 x 10 = 170 kN/m², Z= 5 mThe embankment is divided into blocks as shown in figure for…
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Q: Refer to Figure, q1 = 90 kN/m; q2 %3D 325 kN/m; x1 = 4 m; x2 = 2.5 m; z = 3 m. the vertical stress…
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- 3. The following convergence measurements (U) have been made in a 4.6-m-diameter circular vertical shaft in good quality granitic rock mass (Em = 40 GPa, ν = 0.2): θ (deg) U (mm) 0 2.25 45 2.39 90 1.50 135 1.00 a) Derive the equations that relate convergence to in situ stress. b) The angle θ is measured (clockwise) with respect to the x-axis, which is oriented 30 degrees clockwise from True North. What is the orientation of the maximum principal stress with respect to True North?In Problem 16.3, if there was a surcharge of 20 kN/m2 at the ground level, what would be the total horizontal normal stresses at A and B? Use the results from Problem 16.3. 16.3 The soil profile at a site is shown Figure P16.3. Find the total horizontal normal stresses at A and B, assuming at-rest conditions.Two vanes A and B, with length-to-diameter ratios of 3 and 1 respectively, are each used to make a test at the depth in a clay layer. Both vanes have a diameter of 50 mm and the torque values measured were 95 N-m for A and 45 N-m for B. Find the values of undrained shear strength on the horizontal and vertical planes at this depth. Explain why undrained strength in clays may vary with direction.
- A vane shear test was conducted in a saturated soft clay,using a 100 mm 3 200 mm vane. When the vane was rotatedat the standard rate of 0.1°/s, the torque measured inthe torque meter increased to 60 N ? m, and with further rotationreduced to 35 N ? m. Determine the peak and residualundrained shear strengths of the clay.An embankment consists of clay fill for which c=25 kPa and angle of internal friction is 260 (from consolidated undrained test with pore pressure measurement) The weight of fill per unit volume is 18.64 kN/m3. Compute the effective stress in kPa at a depth of 20 m. If the pore pressure at this point is shown by a piezometer to be 180 kPa. a. 62.5 b. 372.8 c. 192.8 d. 21.6For the fully saturated clay layer depicted below, calculate the undrained shear strength in kPa of the clay layer if the factor of safety against failure is equal to 1.2 for short-term stability. Hint: use a simplified chart-based approach.
- A vane 100 mm in diameter and 200 mm in heights was pressed into soft clay in a borehole. The torque was applied and gradually increased to 100 N-m when failure took place. Determine the undrain shear strength.Refer to Figure P6.3. Determine the vertical stress increase Δσ at point A with the values q1 = 90 kN/m, q2 = 325 kN/m, x1 = 4 m, x2 = 2.5 m, and z = 3 m.In a field vane shear test, a 150-mm long and 75-mm wide vane is pressed into a soft clay at the bottom of a borehole. If the clay fails at a torque of 50 Nm, determine the shear strength of the clay?
- Q#5: From the Tri –axial test, determine the effective normal stress on the plane of Maximum shear stress. Explain why the shear failure occurred along the plane with angle 54.73 and not along the plane of maximum shear stress. Take σ’1 = 552, σ’3 = 276, ø’ = 19.45?Q#3. An earth embankment diagram is shown in Figure.1. Determine the vertical stress increase at A due to embankment load.The soil in a deposit underlying an area where a level ground surface exists has a unit weight of 22 kN/m3. Determine the principal stresses o1 and oz at a depth of 5 m below the soil surface if the lateral pressure is 0.50 of the vertical pressure. Adjust your answer to ZERO decimal places. 01 = kN/m2, 03 = kN/m2