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 8, Problem 8.4P
To determine
Find the total stress
Plot the variation of stresses with depth.
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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).
Subject: Geotechnical engineering- Soil Mechanics
Chapter 8 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 8 - Prob. 8.1PCh. 8 - Prob. 8.2PCh. 8 - Prob. 8.3PCh. 8 - Prob. 8.4PCh. 8 - Prob. 8.5PCh. 8 - Prob. 8.6PCh. 8 - Prob. 8.7PCh. 8 - Prob. 8.8PCh. 8 - Prob. 8.9PCh. 8 - The soil profile at a site consists of 10 m of...
Ch. 8 - Prob. 8.11PCh. 8 - Prob. 8.12PCh. 8 - Prob. 8.13PCh. 8 - Prob. 8.14PCh. 8 - A sand has Gs = 2.66. Calculate the hydraulic...Ch. 8 - Prob. 8.16PCh. 8 - A point load of 1000 kN is applied at the ground...Ch. 8 - Point loads of magnitude 9, 18, and 27 kN act at...Ch. 8 - Refer to Figure 8.13. The magnitude of the line...Ch. 8 - Refer to Figure 8.24. Determine the vertical...Ch. 8 - Consider a circularly loaded flexible area on the...Ch. 8 - A flexible circular footing of radius R carries a...Ch. 8 - The plan of a flexible rectangular loaded area is...Ch. 8 - Refer to Figure 8.26. The circular flexible area...Ch. 8 - Refer to Figure 8.27. The flexible area is...Ch. 8 - Prob. 8.26CTPCh. 8 - Prob. 8.27CTP
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- Pressure (kN/m²)27 54 107 214 429 214 107 54 Void ratio1.243 1.217 1.144 1.068 0.994 1.001 1.012 1.024 The table above shows results obtained from an oedometer test on a specimen of saturated clay. A layer of this clay 2.5 m thick lies below a 10 m depth of sand, the water table being at the surface. The saturated weight for both soils is 19 kN/m³. A 10-m depth of fill of unit weight of 21 kN/m³ is placed on the sand over an extensive area. If the fill was to be removed some time after the completion of consolidation, what heave (mm) would eventually take place due to swelling of the clay? (0 d.p). Use unit weight of water of 9.8 kN/m3. Use log base 10.arrow_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- Please Help!!arrow_forward
- Please Explain a little ? Thankyouarrow_forward1 Situation 2 A soil sample in its natural state, when fully saturated, a water content 36.2%. Assume Gs = 2.69. 16. Calculate the void ratio. A. 0.974 C. 0.789 B. 0.563 D. 0.934 17. Calculate the total unit weight of the soil in kN/m³. A. 17.52 C. 20.38 B. 19.32 D. 18.21 18. Calculate the total weight of water required to saturate a soil mass of volume 10m³. A. 48.4 KN C. 45.3 kN D. 56.7 kN B. 50.7 KNarrow_forwardQuestion-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_forward
- Homeworks 2. The following results were obtained from an oedometer test on a specimen of saturated clay: Pressure (kN/m?) 27 54 107 214 429 214 107 54 Void ratio 1.243 1.217 1.144 1.068 0.994 1.001 1.012 1.024 A layer of this clay 8m thick lies below a 4m depth of sand, the water table being at the surface. The saturated unit weight for both soils is 19kN/m3. A 4m depth of fill of unit weight 21 kN/m3 is placed on the sand over an extensive area. Determine the final settlement due to consolidation of the clay. -1 e -eo 1+e, o'y-o'vo my S = i=larrow_forwardHow to solve 9.4arrow_forwardplease just solve 8.3 and 8.4 like how you did abovearrow_forward
- • Soil specimen diameter, D = 18 cm Elevation of water in upper-most piezometer, h = 181cmk Elevation of water in lowest piezometer h2 =116.6cm Distance between the measuring pointsL = 33.4 cmarrow_forwardSubject: Geotechnical engineering- Soil Mechanicsarrow_forwardA 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_forward
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