Problem 3:A normally consolidated clay stratum 10 m thick is located at a depth 15 m below ground level.The clay soil is overlain by a sandy stratum (the soil is sand above the clay stratum). The watertable is located 10 m below the ground level. The submerged unit weight of the sand (Ysub) is 12kN/m³ and the unit weight is 18 kN/m³ above the water table. The increase in pressure at thecenter of the clay stratum is 150 kN/m² due to the weight of a building. Estimate the expectedultimate settlement of the structure due to primary consolidation.Properties of the clay layer:Natural moisture content: 45% Liquid limit: 52% Specific gravity: 2.77GL10 my= 18kN/m³Sand15 mYsub = 12kN/m³Clay10 m

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Answered: Problem 3: A normally consolidated clay…

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 8.11P

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The soil profile shown consists of dry sand (5-m thick) which overlies a layer of clay (8-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water taable rises to the top of the ground surface, what is the change in effective stress (kpa) at the bottom of the clay layer? For sand layer: Void Ratio= 0.83 SG= 2.68 Degree of Saturation= 0.78 For claylayer: Void Ratio= 0.89 SG=2.88
sand layer 5m thick is underlain with a thick layer of clay. the sand has a void ratio of 0.52 and specific gravity 2.64. The clay has a water content of 42% and specific gravity of 2.64. The ground water table is located 3 m below the ground surface. The sand above the water table is 30% saturated. a.) Determine the unit weight of the clay b.) Determine the total stress at a depth of 10 m below the ground surface. c.) Determine the effective stress at a depth of 10m below the ground surface.
The saturated unit weight of sand in the bed of a pond 20 m deep is 20 kN/m3. Unit weight of water is 10 kN/m3. The effective stress at 4 m below bed level of pond is..
A sand layer 6m high overlies a clay layer that is 8m high. Ground water table is at the interface of a sand and clay. The unit weight of sand is 16.16kn/m3, saturated uni weight of clay is 19.65kn/m3, void ratio of clay is 0.74, Liquid limit= 44. Determine the settlement (mm) of the consolidating layer for a stress increase of 52.4kpa. Use stored value. Answer in 5 decimal places.
Effective Stress in Soil Problem 1. The water table in a certain deposit of soil is at a depth of 2m below the ground surface. The soil consists of clay up to depth of 4m from the ground and below which lies sand. The clay soil is saturated even above the water table: Clay strata: ? = 30%,?? = 2.72 Sandy Strata: ? = 26%, ?? = 2.64 1. Compute the total pressure. 2. Compute the pore water pressure. 3. Compute the effective stress pressure at a depth of 8m below the ground surface
A deposit of sand has porosity of 35% and G = 2.7. The soil is dry in top 1.5 m depth, it has 15% moisture content in next 1.8 m depth and it is submerged below it. Find : ) Effective pressure at a depth of 8 m below the ground level. (ii) Change in effective pressure if the water table suddenly drops to a level of 6 m below the ground level. (iii) Shear strength of the soil on horizontal plane at 8 m depth for both the positions of ground water table if o=30°.
A soil profile consists of sand (7-m thick) which overlies a layer of clay (9-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer? For sand layer: Void Ratio = 0.75, Specific gravity = 2.62, Degree of Saturation = 0.77 For clay layer: Void Ratio = 0.87, Specific gravity = 2.85 Round off to two decimal places.
A 10 m thick sand layer is underlain by 8 m thick clay layer. The groundwater is found to be at 3 m below the surface at the present time. In the Past (long time ago) the ground water table was at 6 m below the ground surface. The sand unit weight, ymoist=18 kN/m³ and the clay saturated density y«at = 17 kN/m³. Required: A) Total stress, pore pressure and effective stress at points A, B and C in Both Cases? B) Calculate the over consolidation ratio (OCR) at the midpoint of the clay layer? A Present groundwater level Sand Y= 18 kN/m3 10m 3m Current B Case 4m A Clay y= 17 kN/m3 C 4m A Sand Past groundwater level Tem 10m Y= 18 KN/m3 Previous B Case 4 m A Clay y= 17KN/m C
From the figure shown, H₁ = 0.60, H₂ = 0.90 m. and h = 0.45 m. The sand has a saturated unit weight of 18.65 KN/m³. Hydraulic conductivity of sand K= 0.12 cm/sec. If the cross sectional area of tank = 0.46 m², determine the total stress at point C in KPa. h=0.45m T H₁-0.60 m H₂-0.90 m Direction of flow H₂O Sand 1265 valve open
A ground profile consists of 2.0 meters silty sand underlain by 3.0 meters of clay. The ground water table is 3.0 meters below the ground surface. The sand has a unit weight of 14 kN/cu.meter. The clay has a unit weight of 16 kN/cu.meter above the water table and 20 kN/cu.meter below the water table. Determine the total soil stress at the bottom of the clay layer.
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need fast please A soil profile consists of sand (6-m thick) which overlies a layer of clay (6-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer? For sand layer: Void Ratio = 0.88, Specific gravity = 2.75, Degree of Saturation = 0.79 For clay layer: Void Ratio = 0.99, Specific gravity = 2.86 Round off to two decimal places.

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