The vertical soil profile shown below is loaded with a uniform surcharged pressure of 30 kPa on the ground surface. If the water table is 1m under the ground surface, calkulate the consolidation settlement in clay layer 2. Note: Clay Properties from laboratory consolidation on cay sample taken from these clay layers are: oc-160 kPa, C 0.02 , Ce-0.2, eo 0.9 Sand - 20 kN m Clay toyer Sand Clay layer -2 Sand Rock -60m-

The vertical soil profile shown below is loaded with a uniform surcharged pressure of 30 kPa on the ground surface. If the water table is 1m under the ground surface, calkulate the consolidation settlement in clay layer 2. Note: Clay Properties from laboratory consolidation on cay sample taken from these clay layers are: oc-160 kPa, C 0.02 , Ce-0.2, eo 0.9 Sand - 20 kN m Clay toyer Sand Clay layer -2 Sand Rock -60m-

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 9.5P

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Given the following data for the normally consolidated clay layer in the field. Compute the primary consolidation settlement. Thickness of clay layer= 3.0m Cc= 0.30 e= 0.70 Overburden pressure= 250 Kpa ΔP= 46 kPa Cα= 0.022
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The figure below shows the soil profile at a site where you plan to lower the water table. You have results from two consolidation tests, one from the upper 12 ft thick overconsolidated crust, and another from the lower 40 ft thick normally consolidated zone. You plan to lower the water table from its current 12 ft depth to 25 ft below ground surface. The consolidation properties for each layer are shown. (Assume that changes in GWT do not affect γt of clay). a. Compute the σ′v in the middle of each layer before and after the water table is lowered b. Determine the total settlement that will result from lowering the water table
A clay layer 5 m thick has double drainage. It was consolidated under a load of 127.5 kN/m2. The load is increased to 197.5 kN/m2. The coefficient of volume compressibility is 5.79 x 10^-4 m2/Kn and value of k = 1.6 x 10^-8 m/min. If the test sample is 2 cm thick and attains 100% consolidation in 24 hours, what is the time in days taken for 100% consolidation in the actual layer? a. 62,500 b. 60,000 c. 65,000 d.67,500
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