Part 2 Refer to Problem 12.6, what would be the average degree of consolidation (U) of the clay layer 180 days after the application of distributed load on the ground surface (Ao) is appled? Given C, 2.8 x 10-6m2/min. 12.6 Refer to Figure 12.42. Given: H, = 2.5 m, H, = 2.5 m, H3 = 3 m, and AO = 100 kN/m?. Also, Sand: e = 0.64, G, 2.65 %3D Clay: e = 0.9, G, = 2.75, LL = 55 Estimate the primary consolidation settlement of the clay layer assuming that it is normally consolidated.

Part 2 Refer to Problem 12.6, what would be the average degree of consolidation (U) of the clay layer 180 days after the application of distributed load on the ground surface (Ao) is appled? Given C, 2.8 x 10-6m2/min. 12.6 Refer to Figure 12.42. Given: H, = 2.5 m, H, = 2.5 m, H3 = 3 m, and AO = 100 kN/m?. Also, Sand: e = 0.64, G, 2.65 %3D Clay: e = 0.9, G, = 2.75, LL = 55 Estimate the primary consolidation settlement of the clay layer assuming that it is normally consolidated.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.15P

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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.
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.
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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 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.
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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. a. 92.9 b. 49 c. 87.64 d. 100.5
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