A 4-meter clay layer (e = 0.89, Gs = 2.69, Cc = 0.349) is overlain with 4-meter-thick sand layer (e = 0.83, Gs = 2.51). The water table is at the interface of the sand and clay layer. If a 2-meter-thick land fill (Y = 17.36 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 4-meter clay layer (e = 0.89, Gs = 2.69, Cc = 0.349) is overlain with 4-meter-thick sand layer (e = 0.83, Gs = 2.51). The water table is at the interface of the sand and clay layer. If a 2-meter-thick land fill (Y = 17.36 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

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter11: Ground Improvement

Section: Chapter Questions

Problem 11.9P

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The soil profile at a site consists of a 3-m thick sand layer (moist unit weight = 16.5 kN/m^3, saturated unit weight = 18.5 kN/m^3) underlain by a 6-m thick clay layer (w = 27%, Gs = 2.70, mv = 0.31 MPa^-1, Cv = 2.6 m^3/year), which is underlain by a gravel layer as shown in the figure. A 3 m compacted fill with a unit weight of 20 kN/m^3 is required to be placed at ground level.a) What would be the final consolidation settlement, in mm rounded to the first decimal place?b) How long will it take for 50 mm consolidation settlement, in months rounded to the first decimal place?c) What would be the consolidation settlement in one year, in mm rounded to nearest whole number?
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Define Primary Compression Settlement for Clays.