A uniform homogeneous sand deposit of specific gravity 2.60 and void ratio 0.65 extends to large depth. The ground water table is 2 m from G.L. Determine the effective stress in kPa at depth of 2 m. Assume that the soil from 1 m to 2 m has capillary moisture leading to degree of saturation of 60%.a a. 71.28 b. 110.52 c. 39.24 d. 33.24

A uniform homogeneous sand deposit of specific gravity 2.60 and void ratio 0.65 extends to large depth. The ground water table is 2 m from G.L. Determine the effective stress in kPa at depth of 2 m. Assume that the soil from 1 m to 2 m has capillary moisture leading to degree of saturation of 60%.a a. 71.28 b. 110.52 c. 39.24 d. 33.24

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Consolidation

Section: Chapter Questions

Problem 9.15P

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A uniform homogeneous sand deposit of specific gravity 2.60 and void ratio 0.65 extends to large depth. The ground water table is 2 m from G.L. Determine the effective stress in kPa at depth of 2 m. Assume that the soil from 1 m to 2 m has capillary moisture leading to degree of saturation of 60%.
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.
What is the intensity of active earth pressure at a depth of 10.0 m in dry sand with an angle of shearing resistance of 30 degrees and unit weight of 18kN /m ^ 3 ?
A dense silt layer has the following properties.void ratio = 0.30eff. Diameter ?10 = 10??capillary constant (c)=0.20 cm²Groundwater level is 8.0m below the ground surface 1. Calculate the height of capillary rise in the silt. 2. Calculate the vertical effective stress in kpa at 5m depth, assume ?? = 26.5 ??/?³and that the soil above the capillary action rise and ground surface is partially saturated at 50%. 3. Calculate the effective vertical stress at 10m depth assuming ?? = 26.5 ??/?³and that the soil above the capillary action rise and ground surface is partially saturated at 50%.
A soil profile is shown in Figure Q3(b)(i). The groundwater level is located on the ground surface. The sand layer is under artesian pressure where the excess pore water pressure is 40 kN/m^2. (i) Calculate the total vertical stress, pore water pressure and effective vertical stress at the base of each layer. (ii)Determine the increment of the effective stress at the base of sand layer if the 1.5m height fill will be imposed on the ground surface. Note that, the density of the fill material is 1750 kg/m^3. (iii) The excavation will be made in the clay layer for the basement construction. Evaluate the stability of the soil from boiling or quick condition. The depth of the excavation is shown in Figure Q3(b)(ii). (iv)Propose the maximum depth of cut that can be made to avoid boiling or quick condition.
20 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.
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?
A soil profile consists of a sand layer underlain by a clay layer, as shown. If the degree of saturation of the sand above water table was 50%. Saturated and dry unit weight of sand are 21.2 kN/m^3 and 18.22 kN/m^3 respectively. The saturated unit weight of clay is 18 kN/m3. Determine the total stress, pore pressure and effective stress at point A,B,C.
31 A sand layer 7 meters high overlies a clay layer that is 8 meters high. Ground water table is at the interface of sand and clay. The unit weight of sand is 17.98 kN/m3, saturated unit weight of clay is 19.74 kN/m3, void ratio of clay is 0.78, LL = 42. Determine the settlement (in mm) of the consolidating layer for a stress increase of 52.28 kPa.
At what depth would total the vertical stress in a deep deposit of clay (e = 1.1, Gs = 2.74) be 100 kPa if the water table is 1 m below the ground surface and the above the water surface a saturation degree of 70 % exists. What is the effective stress at the same depth?
Question 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.
At what depth would total the vertical stress in a deep deposit of clay (e = 1.1, Gs = 2.74)be 100 kPa if the water table is 1 m below the ground surface and the above the watersurface a saturation degree of 90 % exists. What is the effective stress at the same depth?