A ground profile consists of 9.0 meters thick sand soil. Water table is located 4.0 meters below ground surface. The void ratio of the layer above water table is 61.0% while the specific gravity is limited to 2.66. The porosity of the saturated layer is 32.432% with specific gravity of 2.67 What should be the location of water table below. NGL, in such a way that the total effective stress 9 meters below ground is 104 kPa

A ground profile consists of 9.0 meters thick sand soil. Water table is located 4.0 meters below ground surface. The void ratio of the layer above water table is 61.0% while the specific gravity is limited to 2.66. The porosity of the saturated layer is 32.432% with specific gravity of 2.67 What should be the location of water table below. NGL, in such a way that the total effective stress 9 meters below ground is 104 kPa

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter8: Stresses In A Soil Mass

Section: Chapter Questions

Problem 8.10P: The soil profile at a site consists of 10 m of gravelly sand underlain by a soft clay layer. The...

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The soil profile at a site consists of 10 m of gravelly sand underlain by a soft clay layer. The water table lies 1 m below the ground level. The moist and saturated unit weights of the gravelly sand are 17.0 kN/m3 and 20.0 kN/m3, respectively. Due to some ongoing construction work, it is proposed to lower the water table to 3 m below the ground level. What will be the change in the effective stress on top of the soft clay layer?
The soil profile consists of a 12 m layer of sand, 6 m layer of clay and incompressible bedrock.The water table is located 5 m below the ground surface. The weight of sand above the watertable is 17.9 kN/m3 below is 18.4 kN/m3 . The saturated weight of the clay is 18.2 kN/m3. Clayhas a compression index of 0.18 and a void ratio of 0.80. If the structure to be built on theground will increase the soil pressure by 100 kPa, determine the settlement of the clay layer.
The profile at a site consists of 5 m of sand overlying 10 m of compressible clay, which in turn overlies a dense sand. The water table is at the top of the profile. The total unit weight of the top sand is 19 kN/m3, and that of the clay is 18 kN/m3. The cv of the clay is estimated to be 5 x 10-3 cm2/sec. Initially the clay is normally consolidated. It is planned to place a temporary fill that will exert a vertical load of 200 kPa over the entire site. How long must the fill be in place so that, after it is removed, the maximum past pressure at every point in the clay is at least 50 kPa larger than the vertical effective stress that existed before the fill was placed?
a 18-m thick soil has water table 5 m. below the ground surface. The soil has a void ratio of 0.52 and specific gravity of 2.64. above the water table, the soil has a degree of saturation equal to 49.88%. Direct shear test conducted on the soil shoes that the an angle of internal friction of 28.04 degree and cohesion of 17.2 kPa. What is the potential shear strength in(kpa) on a horizontal plane at a depth pf 7m. below the ground surface?
A 16-m thick soil has a water table 4 m. below the ground surface. The soil has a void ratio of 0.42 and specific gravity of 2.62. Above the water table, the soil has a degree of saturation equal to 49.96%. Direct shear test conducted on the soils shows that the an angle of internal friction of 24.25 degrees and cohesion of 15.13 kPa. What is the potential shear strength (in kPa) on a forizontal plane at a deptj of 8m. below the ground surface?
In the field, a soft normally consolidated clay layer exists for athickness of 20m. The natural water content, specific gravity ofsolids and the liquid limit of the clay are 40%, 2.7 and 60 %respectively. The ground water table is at the surface and thesaturated unit weight is 19.80 kN/m3 . The vertical stress increment at the center of the clay layer due to the foundation load is 10 kN/m2 . Estimate the settlement of the foundation
A 19-m thick soil has water table 5m. below the ground surface. The soil has a void ratio of 0.42 and specific gravity of 2.60. Above the water table, the soil has a degree of saturation equal to 49.65%. Direct shear test conducted on the soil shows that the an angle of internal friction of 24° and cohesion of 15.36 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 7 m. below the ground surface?
A 19-m thick soil has water table 5 m. below the ground surface. The soil has a void ratio of 0.52 and specific gravity of 2.68. Above the water table, the soll has a degree of saturation equal to 41.64%. Direct shear test conducted on the soil shows that the an angle of internal friction of 28 65° and cohesion of 17.28 kPa. What is the potential shear strength (in kPa) on a horizontal plane at a depth of 7 m. below the ground surface? Use stored value. Answer 5 decimal places.
A 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: 60.25
A 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.
A saturated clay layer 4 m thick is located 6 m below GL. The void ratio of the clay is 1.0. When a raft foundation is located at 2 m below GL, the stresses at the top and bottom of the clay layer increased by 150 and 100 kN/m2 respectively. Estimate the consolidation settlement in cm if the coefficient of compressibility 0.002 cm2/N.
A 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.