Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Question
Chapter 3, Problem 3.23P
(a)
To determine
Calculate the moist unit weight of the borrow soil.
(b)
To determine
Calculate the degree of saturation of the borrow soil.
(c)
To determine
Calculate the moist unit weight of the compacted backfill.
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A 3 layer soil has the following properties from top to bottom. Obtain the equivalent vertical coefficienct of permeability, in cm/sec, round off to 7 decimal places, and obtain the equivalent horizontal coefficient of permeability, in cm/sec, round off to 5 decimal places.
PROBLEM 50: Compute the compression index of undisturbed clay having a plastic limit of 32% and a plasticity index of 8%
A three-layer soil has the following properties:
Layer 1: k = 2.77 x 10^-3 cm/s, H = 3.17 m.
Layer 2: k = 1.6 x 10^-2 cm/s, H = 4.97 m.
Layer 3: k = 3.06 x 10^-3 cm/s, H = 4.25 m.
Determine the equivalent vertical coefficient of permeability of the soil arrangement. Layer 1 is on top of layer 2 while layer 2 is on top of layer 3. Round off to four decimal places.
Chapter 3 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Prob. 3.4PCh. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Prob. 3.23PCh. 3 - Prob. 3.24PCh. 3 - For a given sandy soil, emax = 0.75 and emin =...Ch. 3 - For a given sandy soil, the maximum and minimum...Ch. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.1CTPCh. 3 - Prob. 3.2CTPCh. 3 - Prob. 3.3CTP
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- For a normally consolidated soil, the following is given: Determine the following: a. The compression index, Cc. b. The void ratio corresponding to pressure of 200 kN/m2arrow_forwardA horizontal stratified soil deposit consists of three layers each uniform in itself. The permeabilities of these layers are 8 × 10–4 cm/s, 52 × 10–4 cm/s, and 6 × 10–4 cm/s, and their thickness are 7, 3 and 10 m respectively. Find the effective average permeability of the deposit in the horizontal and vertical direction (mm/s).arrow_forwardWhat is the active pressure coefficient for a soil with 28˚ angle of internal friction and cohesion of 20 kPa? What will be the effect if the cohesion is decreased to 5 kPa?arrow_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_forwardFor a given sandy soil, the maximum and minimum void ratios are 0.77 and 0.41, respectively. If Gs=2.66 and w=9%, what is the moist unit weight of compaction (kN/m3) in the field if Dr=90% ? For a given sandy soil, emax=0.75 and emin=0.52. If Gs=2.67 and Dr=65% determine the void ratio and the dry unit weight.?arrow_forwardA three-layer soil has the following properties: Layer 1: k = 2.81 x 10^-3 cm/s, H = 3.95 m. Layer 2: k = 1.94 x 10^-2 cm/s, H = 4.51 m. Layer 3: k = 3.36 x 10^-3 cm/s, H = 4.15 m. Determine the equivalent vertical coefficient of the permeability of the soild arrangement. Layer 1 is on top of layer 2 while layer 2 is on top of layer 3.arrow_forward
- A layered soil is shown in the figure below. Given that H1 = 1 m, k1 = 10-4 cm/sec H2 = 1 m, k2 = 2.8 x 10-2 cm/sec H3 = 2 m, k3 = 3.5 x 10-5 cm/sec Estimate the ratio of equivalent permeability, kH(eq)/kV(eq).arrow_forwardThe moist unit weight of a soil is 19.2 kN/m3. Given that Gs = 2.69 and w = 9.8%, determine:a. Void ratiob. Dry unit weightc. Degree of saturationarrow_forwardthe moist unit weight of a soil is 19.2kN/m3. Given that Gs = 2.69 and w =9.8%, determine the void ratio, dry unit weight and degree of saturationarrow_forward
- A soil sample has a dry unit weight of 17.92 kN/M3 and a void ratio of 50% .Compute the hydraulic gradient of the quicksand condition .arrow_forwardA layered soil is shown with the corresponding values K1, K2, and K3. Compute the equivalent horizontal coefficient of permeability Compute the equivalent vertical coefficient of permeability Compute the ratio of the equivalent horizontal coefficient of permeability to the equivalent vertical coefficient of permeabilityarrow_forward1) The moist unit weight of a soil is 19.2 kN/m3 . Given that Gs = 2.69 and w = 9.8%, determine: a. Void ratio b. Dry unit weight c. Degree of saturation 2) Refer to Problem 1 Determine the weight of water, in kN, to be added per cubic meter (m3) of soil for: a. 90% degree of saturation b. 100% degree of saturationarrow_forward
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