A recently constructed long Embankment is shown in the figure. It was made from compacted (Rolled) earth fill with bulk density of 18 kN/m3 a) Determine the stress increase at indicated mid points on the clay layer A,B,C b) Calculate the total consolidation settlement of the clay due to embankment loading at the corresponding points A,B,C (The clay is normally consolidated with w - 55.6%, LL - 68%, and PL.- 30%. G, = 2.7 12 m 12 m Rolled Fill Y-18 kN/m3 Dry Sand Y=16 kN/m3 WT V 3 m Soft saturated clay Sand and gravel

A recently constructed long Embankment is shown in the figure. It was made from compacted (Rolled) earth fill with bulk density of 18 kN/m3 a) Determine the stress increase at indicated mid points on the clay layer A,B,C b) Calculate the total consolidation settlement of the clay due to embankment loading at the corresponding points A,B,C (The clay is normally consolidated with w - 55.6%, LL - 68%, and PL.- 30%. G, = 2.7 12 m 12 m Rolled Fill Y-18 kN/m3 Dry Sand Y=16 kN/m3 WT V 3 m Soft saturated clay Sand and gravel

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 9.4P

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For a given consolidated clay: Gs= 2.71; LL= 45; In situ average effective overburden pressure = 120 kPa; In situ void ratio= 0.80 ; Thickness of clay layer = 4m ; average increase of effective stress on clay layer= 40 kPa; Effective pressure at the mid-height of clay layer= 60 kPa; Swell Index (Cs)= 1/5 Cc. Compute the pre-consolidation pressure in kPa. Show free body diagram a.92.9 b.100.5 c.49 d.87.64
For a given consolidated clay: Gs= 2.71; LL= 45; In situ average effective overburden pressure = 120 kPa; In situ void ratio= 0.80 ; Thickness of clay layer = 4m ; average increase of effective stress on clay layer= 40 kPa; Effective pressure at the mid-height of clay layer= 60 kPa; Swell Index (Cs)= 1/5 Cc. Compute the pre-consolidation pressure in kPa. a. 92.9 b. 49 c. 87.64 d. 100.5
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.
Knowing that the compression index, Cc = 0.333, and the preconsolidation pressure s’c = 140 kPa with an initial void ratio e0 = 0.85 for a H = 3 m thick clay layer which is subjected to a new loading for an embankment resulting in a stress increase to 200 kPa; what is the expected consolidation settlement? Provide answer below in meters (m).
For a given consolidated clay: Gs= 2.71; LL= 45; In situ average effective overburden pressure = 120 kPa; In situ void ratio= 0.80 ; Thickness of clay layer = 4m ; average increase of effective stress on clay layer= 40 kPa; Effective pressure at the mid-height of clay layer= 60 kPa; Swell Index (Cs)= 1/5 Cc. Compute the primary consolidation settlement in mm. a.87.64 b.49 c.92.9 d.100.5
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.
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 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.
A stratum of clay is 2m thick and has an initial vertical effective stress of 50 KN/m2. The foundation load caused an increased pressure of 40 KN/m2 at the mid-layer of clay. Consolidation test revealed the following results: overconsolidation ratio (OCR) = 1.5 Compression index = 0.25 Recompression index = 0.05 Secondary compression index = 0.02 Initial void ratio = 0.90 Determine the following a. the primary consolidation settlement of the clay layer (in mm). b. If the primary consolidation settlement took 2 years to achieve in the field, calculate the secondary consolidation settlement after a period of 5 years (in mm). c. the preconsolidation pressure (in KPa. Note: Kindly give all right solutions with clear calculations.
A 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.
A 5.1 m thick clay soil with a current overburden pressure of 89 kPa is going to experience an additional stress of 89 kPa after a new structure is built. If it was determined that the clay is normally consolidated has an initial void ratio of 1.2, a recompression index of 0.07, and a compression index of 0.47. Determine the total amount of settlement that is expected to occur. Provide your answer in meters to 3 decimal places.