Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 12, Problem 12.13P
To determine
Find the soil encountered at a depth of 32 m.
Find the relative density of the soil.
Find the friction angle of the soil.
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A soil profile is shown in Figure P3.2 along with the standard penetration numbers in the clay layer. Use Eqs. (3.8) and (3.9) to determine the variation of cu and OCR with depth. What is the average value of cu and OCR?
A cylindrical sample of soil having a cohesion of 80 kN/m2 and an angle of internal friction of 20° is subjected to a cell pressure of 100 kN/m2. Determine the angle made by the failure plane with the axis of the sample.
For a falling or variable head permeability test, the following are given:
Length of soil specimen = 12 cm.
Cross sectional area of stand pipe: A = 0.018 cm2
Diameter of soil specimen = 7.5 cm.
Time of collection of water: t = 65 sec.
Head difference at time t = 0; h1 = 70 cm.
Head difference at time t = 65 sec; h2 = 40 cm.
Temperature of water: 14 ֯C
Find the absolute permeability of the soil at 20 ֯C.
Chapter 12 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- Question-2: A soil profile is shown in Figure 2.1. Calculate and plot the variation of total vertical stress, pore pressure and effective vertical stress with depth.arrow_forwarda soil sample taken from subsurface exploration activity has the following properties: Gs= 2.67, e = 0.45, and S= 40%. a. Evaluate the unit weight of the soil in kN/m³. b. Evaluate the unit weight of the soil when dry in kN/m³. c. Evaluate the unit weight of the soil when fully saturated in kN/m³.arrow_forwardA soil profile consisting of three layers is shown in the figure. Calculate the values of the total stress, effective stress ad pore waterpressureat points A, B, C, and D for the following cases. In each case, plot the variations with depth. Characteristics of layers 1, 2, and 3 for each case are given belowarrow_forward
- Figure 2 shows the dry density versus water content relationship for a fine-grained soilcompacted using two different levels of energy. Three points are identified on thesecompaction curves and labeled as A, B and C. Compare the relative saturated shear strength of soil specimens A and C?arrow_forwardA cylindrical sample of soil having a cohesion of 80 kN/m2 and an angle of internal friction of 20°is subjected to a cell pressure of 100 kN/m2. Determine the maximum deviator stress at which the sample will fail in kPa. Show diagramarrow_forward(a) Samples taken from a uniform deposit of granular soil are found to have a unit weight of 19.6 kN/m3 and an angle of internal friction of 35°. What is the shearing strength of the soil on a horizontal plane at a point 4 m below the ground surface?arrow_forward
- Solve it completely....Determine the average horizontal and vertical permeabilities of a soil mass made up of three horizontal strata, each 1 m thick, if the coefficients of permeability are 1 × 10–1 mm/s, 3 × 10–1 mm/s, and 8 × 10–2 mm/s for the three layers.arrow_forward9.1 Through 9.3 A soil profile consisting of three layers is shown in Figure 9.25.Calculate the values of σ, u, and σ′ at points A, B, C, and D for the following cases. Ineach case, plot the variations of σ, u, and σ′ with depth. Characteristics of layers 1, 2,and 3 for each case are given below:arrow_forwardSubject: Soil Mechanics Please provide a solution and diagram Boreholes reveal that a thin layer of alluvial silt exists at a depth of 50 ft below the surface of the ground. The soil above this level has an average dry unit weight of 96 lb/ft3 and an average water content of 30%. The water table is approximately at the surface. Tests on undisturbed samples give the following data: cu = 1008 lb/ft2, undrained friction angle = 13°, cd = 861 lb/ft2, drained friction angle = 23°. Estimate the shearing resistance in psf of the silt on a horizontal plane when the shear stress builds up slowly a. 3120 b. 861 c. 2185 d. 2449arrow_forward
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