Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 3.6QPP
The sub-surface profile at a certain site is shown in Figure 3.20. Compute
Figure 3.20
Soil profile for Problem 3.6.
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Students have asked these similar questions
If the value of the coefficient of lateral earth pressure at rest (KO) for the compressible
silty clay layer of Problem 2 is 0.68, what are the total and effective horizontal stresses at
mid-depth of the layer in parts (a) and (b) of Problem 2?
A soil sample with a layered soil is placed in a tube 3m long. water is allowed to flow in the one end of the soil. The cross-sectional area of the soil sample is 0.1m^2, and the average amount of water collected is 120 cm^2/sec. 25% of the total head loss occurs in soil A, another 25% of the total head loss occurs in soil C.
a). determine the total elevation, and pressure pressure head loss at point 1,2,3 and 4.
b). Determine the hydraulic gradient in the soil B
Q-1: A soil profile consisting of three layers is shown in the following figure.
a) Calculate the values of o, u and o' at points A, B, C, and D
Layer no.
1
2
3
↑
H₁
H₂
H₂
Thickness
H, = 2.1 m
H₂ = 3.66 m
H₂ = 1.83 m
Dry sand
Soll parameters
Y₁ = 17.23 kN/m³
Ysat
18.96 kN/m³
Ysat
18.5 kN/m³
Sand Clay Rock
Layer 1
Groundwater table
Layer 2
Layer 3
ⒸDengage Learning 2014
b) Calculate the effective stress at c when water table drops by 2m (consider x 16.5 for layer 2).
c) Calculate the effective stress at c when water table rises by 2m above layer 1 due to flooding
(consider Ysa 18.5 for layer 1).
Chapter 3 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 3 - Explain the difference between moisture content...Ch. 3 - A certain saturated sand has a moisture content...Ch. 3 - Consider a soil that is being placed as a fill and...Ch. 3 - A sample of soil has a volume of and a weight of...Ch. 3 - A site is underlain by a soil that has a unit...Ch. 3 - The sub-surface profile at a certain site is shown...Ch. 3 - A vertical load of 300 kN is applied to a area at...Ch. 3 - A vertical load of 20 k is applied to a area at...Ch. 3 - 3m3m footing is to be built on the surface of a 15...Ch. 3 - A 3 ft square footing carries a sustained load of...
Ch. 3 - A 2m thick fill is to be placed on the soil shown...Ch. 3 - Estimate the effective friction angle of the...Ch. 3 - Explain the difference between the drained...Ch. 3 - A soil has c=5 kPa and =32. The effective stress...Ch. 3 - A footing with an embedment of 2 m is embedded in...Ch. 3 - Prob. 3.16QPPCh. 3 - Prob. 3.17QPPCh. 3 - A 9 ft thick fill is to be placed on the soil...
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- A soil profile consisting of three layers is shown below. Calculate the values of σ, μ, and σ’ at points A, B, C, and D.arrow_forwardPlease check and provide answersarrow_forwardA soil profile is shown in Figure 6.24. Calculate the values of o, u, and o at points A, B, C, and D. Plot the variation of ơ, u, and ơ with depth. We are given the values in the table. Layer No. Thickness (m) Unit weight (kN/m³) H = 2 H2 = 3 = 7 I Ydry = 15 Ysat = 17.8 II %3D III %3D Ysat = 18.6arrow_forward
- A soil profile is shown in Figure.Plot the variation of:arrow_forwardThe soil sample in a tri axial test have the following stresses Cell pressure 25 Кра 34 Кра Pore stress Deviator stress 20 Кра 31 Кра 12 Кра 10 Кра a) Calculate the drained angle of internal friction b) Find the cohesion of soil c) What is the angle of failure in shear?arrow_forwardConsider the soil detail and profile are shown in the Table 1.1 and Figure 1.2. Table 1.1 Layer No. Thickness, H Soil Parameters e = 0.52, Gs = 2.62 e = 0.52, Gs = 2.65 w = 20%, e = 0.50 1 4.8 m 2 2.5 m 3 2.2 m Layer 1 H2 Layer 2 C. Layer 3 Figure 1.2 O Dry sand Sand D Clay Rock If groundwater table is x = 0.25 m above point B (use yw = 9.81 kN/m3), determine: a. The effective stress at point D. b. If the effective stress at point D is lowered by 10 kPa, what is the new elevation (new x) of groundwater table measured from point B?arrow_forward
- Question Attachedarrow_forwardGeotechnical engineeringarrow_forward.In the given soil profile detemine the 6,µ and 6' of the points A,B.C and D. Show the variations in a diagram, Considering NO seepage. H1 = 4.0 m e = 0.4 H1 Layer 1 Gs = 2.65 Ground water H2 = 5.0 m e= 0.6 H2 Layer 2 Gs = 2.68 H3 = 3.0 m H3 Layer 3 e = 0.81, Gs = 2.73 %3Darrow_forward
- A soil profile consisting of three layers is shown in the below figure. Calculate the values of o, u, and o' at points A, B, C, and D for the following case:arrow_forward2) A soil profile consisting of three layers is shown in the Figure. A) Calculate the values of σ, u and σ' at points A,B,C and D if Layer 1: H1=5m, e=0.7, Gs=2.69 Layer 2: H2=8m, e=0.55, Gs=2.7 Layer 3: H3=3m, w=38%, e=1.2 B) What is the change in effective stress at point C if: If the water table drops by 2m? If the water table rises to the surface up to point A? Water level rises 3 m above point A due to flooding?arrow_forwardQ2. A soil profile consisting of three layers is shown in Figure 1 below. Unit weight of water (yw) = 9.81 kN/m³ Layer no. 1 2 3 ↑ H₁ H₂ Dry sand Sand Clay Rock Figure 1: Soil Profile Thickness H₁ = 1.5 m H₂ = 2.53 m H3 = 2.64 m Layer 1 Groundwater table Layer 2 Layer 3 Soil parameters Yd = 16.5 kN/m³, Ysat = 17.42 kN/m³ Ya = 16.5 kN/m³, Ysat = 18.55 kN/m³ Yd = 17.50 kN/m³, Ysat = 19.23 kN/m³ a) Calculate the values of o, u and o' at points A, B, C and D. b) Calculate the effective stress at C when water table drops by 2 m. c) Calculate the effective stress at C when water table rises by 1 m above layer 1 due to flooding.arrow_forward
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