Principles of Geotechnical Engineering (MindTap Course List)
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 11, Problem 11.14P
To determine

Calculate time taken for 85% consolidation of soil.

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For a laboratory consolidation test on a clay specimen (drained on both sides) the following results were obtained: Thickness of clay soil= 25 mm; P_1 = 50 kPa; P_2 = 120 kPa; e_1 = 0.92; e_2 = 0.78; Time for 50% consolidation= 2.5 min. Tv = 0.197. Determine the coefficient of compressibility in m2/kN. a.2.56 x 10^-2 b.1.081 x 10^-3 c.1.23 x10 ^-5 d.1.31 x 10^-7
Refer to Figure P2.18. A total of 60 mm consolidation settlement is expected in the two clay layers due to a surcharge of Δσ. Find the duration of surcharge application at which 30 mm of total settlement would take place.
For a laboratory consolidation test on a clay specimen (drained on both sides) the following results were obtained: Thickness of clay soil= 25 mm; P_1 = 50 kPa; P_2 = 120 kPa; e_1 = 0.92; e_2 = 0.78; Time for 50% consolidation= 2.5 min. Tv = 0.197. Determine the coefficient of consolidation in m2/m. Show free body diagram a.1.081 x 10^-3 b.1.23 x10 ^-5 c.1.31 x 10^-7 d.2.56 x 10^-2
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