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 11, Problem 11.9P
To determine
Find the degree of consolidation caused by the combination of vertical drainage and radial drainage.
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a dense silt layer has the following properties: void ratio = 0.50, effective diameter d10 = 10 um, capillary constant c = 0.20 cm2. free ground water level is 8.0 m below the ground surface. find the vertical effective stress in kpa at 5m depth. assume unit weight of solids = 26.5 kn/m3 and that the soil = 26.5 kn/m3 and that the soil above the capillary action rise and ground surfaces is partially saturated at 50%
from the problem above, find the vertical effective stress at 10m depth. assume unit weight of solids=26.5kN/m3 and that the solid above the capillary action rise and ground surface is partially saturated at 50%.
A 2m clay layer has values of e = 0.92 , Gs = 2.72 and liquid limit of 40%. Above the clay is a 3m thick layer sand with e = 0.50 and Gs = 2.62. The water table is located 1.6 m below the ground surface having a unit weight of 17.3 kN/cu. Meter, determine the following:
a. Compression index of clayb. Effective pressure at the midpoint of clayc. Primary settlement for normally consolidated clay.......
A 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.
Chapter 11 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- A three-layer soil has the following properties: Layer 1: k = 2.57 x 10^-3 cm/s, H = 3.6 m. Layer 2: k = 1.7 x 10^-2 cm/s, H = 4.63 m. Layer 3: k = 3.19 x 10^-3 cm/s, H = 4.81 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.arrow_forwardA dense silt layer has the following properties: void ratio e = 0.50, effective Diameter D10 = 10 μm, capillary constant C = 0.20 cm2. The free groundwater level is 8m below the ground surface. Assume unit weight of solids y= 26.50kN/m3. Find the vertical effective stress at 10m depth. Assume that the soil above the capillary zone is partially saturated at 50%.arrow_forward20 A 4-meter clay layer (e = 0.92, Gs = 2.89, Cc = 0.315) is overlain with 4-meter-thick sand layer (e = 0.86, G = 2.63). The water table is at the interface of the sand and clay layer. If a 3-meter-thick land fill (γ = 17.21 kN/m3) is placed over the existing ground surface, compute the consolidation settlement (in mm.) of the clay layer. Hint: Use the land fill's resulting pressure on the ground surface as the stress increase. Round off to two decimal places.arrow_forward
- A layer of sand 4.50 m thick (Gs = 2.60 , e = 0.70 ,S = 0.85) is underlain with 5m thick clay layer (Gs = 2.65 , w = 28 %). Ground water table is located at the interface of the two soils. What depth below the ground surface would the vertical stress be 100 kPa?arrow_forwardA 2-meter clay layer (e = 0.83, Gs = 2.66, Cc = 0.343) is overlain with 3-meter-thick sand layer (e = 0.84, G = 2.59). The water table is at the interface of the sand and clay layer. If a 3-meter-thick land fill (γ = 17.35 kN/m3) is placed over the existing ground surface, compute the consolidation settlement (in mm.) of the clay layer. Hint: Use the land fill's resulting pressure on the ground surface as the stress increase.arrow_forwardA 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.arrow_forward
- A 4-meter clay layer (e = 0.89, Gs = 2.69, Cc = 0.349) is overlain with 4-meter-thick sand layer (e = 0.83, Gs = 2.51). The water table is at the interface of the sand and clay layer. If a 2-meter-thick land fill (Y = 17.36 kN/m^3) is placed over the existing ground surface, compute the consolidation settlement (in mm) of the clay layer. Hint: use the land fill's resulting pressure on the ground surface as the stress increase.arrow_forwardA 3 meter clay layer (e = 0.93, Gs = 2.64, Cc = 0.329) is overlain with 4 meter thick sand layer (e = 0.76, G = 2.83) The water table is at the interface of the sand and clay layer. If a 3 meter thick land fill (y = 17.26 kN/m^3) is placed over the existing ground surface compute the consolidation settlement in mm of the clay layer. Hint: use the land fill's resulting pressure on the ground surface as the stress increase.arrow_forwardQuestion 6 A 3-meter clay layer (e = 0.86, Gs = 2.69, Cc = 0.304) is overlain with 2-meter-thick sand layer (e = 0.77, G = 2.83). The water table is at the interface of the sand and clay layer. If a 2-meter-thick land fill (γ = 17.53 kN/m3) is placed over the existing ground surface, compute the consolidation settlement (in mm.) of the clay layer. Hint: Use the land fill's resulting pressure on the ground surface as the stress increase. Round off to two decimal places.arrow_forward
- A 2-meter clay layer (e=0.89, Gs=2.55, Cc=0.325) is overlain with 2 meter thick sand layer (e=0.82 G=2.63). the water table is at the interface of the sand and clay layer. if a 2-meter thick land fill (y=17.15kN/m^3) is placed over the existing ground surface, compute the consolidation settlement (in mm) of the clay layer. hint: Use the land fill's resulting pressure on the ground surface as the stress increase.arrow_forwardA 2-meter clay layer (e = 0.88, Gs = 2.67, Cc = 0.305) is overlain with 4-meter-thick sand layer (e = 0.82, G = 2.72). The water table is at the interface of the sand and clay layer. If a 2-meter-thick land fill (γ = 17.97 kN/m3) is placed over the existing ground surface, compute the consolidation settlement (in mm.) of the clay layer. Hint: Use the land fill's resulting pressure on the ground surface as the stress increase. Round off to two decimal places. Selected Answer: 60.25arrow_forwardA dense silt has the following properties: Void ratio (e) = 0.40, SpecificGravity (Gs) = 2.70, Effective diameter d10 = 1x10^-6 m, Capillary constant (C) = 0.20 cm^2. Free ground water level is 8.0 m below the ground surface. a. Find the height of capillary rise in the silt. b. Find the vertical effective stress in kPa at 5m depth. Assume that the soil abovethe capillary zone or capillary action rise to be dry soil and the soil within thecapillary action be partially saturated (degree of saturation, S) at 50%. c. Find the vertical effective stress at 10m depth. Assume that the soil above thecapillary zone or capillary action rise to be dry soil and the soil within the capillaryaction be partially saturated (degree of saturation, S) at 50%.arrow_forward
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