Question IV (30%): A 22 m thick normally consolidated clay layer has a load of 150 kPa applied to it over a large areal extent. The clay layer is located below a 3.5 m thick granular fill (p= 1.8 Mg/m³). A dense sandy gravel is found below the clay. The groundwater table is located at the top of the clay layer, and the submerged density of the clay soil is 0.95 Mg/m³. Consolidation tests performed on 2.20 cm thick doubly drained samples indicate the time for 50% consolidation completed as t50 = 10.5 min for a load increment close to that of the loaded clay layer. Compute the effective stress in the clay layer at a depth of 16 m below the ground surface 3.5 years after the application of the load.

Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN:9781305081550
Author:Braja M. Das
Publisher:Braja M. Das
Chapter2: Geotechnical Properties Of Soil
Section: Chapter Questions
Problem 2.16P: For a normally consolidated soil, the following is given: Determine the following: a. The...
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Question IV (30%):
A 22 m thick normally consolidated clay layer has a
load of 150 kPa applied to it over a large areal extent. The clay layer is located below a
3.5 m thick granular fill (p= 1.8 Mg/m³). A dense sandy gravel is found below the clay.
The groundwater table is located at the top of the clay layer, and the submerged density
of the clay soil is 0.95 Mg/m³. Consolidation tests performed on 2.20 cm thick doubly
drained samples indicate the time for 50% consolidation completed as t50 = 10.5 min for
a load increment close to that of the loaded clay layer. Compute the effective stress in
the clay layer at a depth of 16 m below the ground surface 3.5 years after the
application of the load.
Transcribed Image Text:Question IV (30%): A 22 m thick normally consolidated clay layer has a load of 150 kPa applied to it over a large areal extent. The clay layer is located below a 3.5 m thick granular fill (p= 1.8 Mg/m³). A dense sandy gravel is found below the clay. The groundwater table is located at the top of the clay layer, and the submerged density of the clay soil is 0.95 Mg/m³. Consolidation tests performed on 2.20 cm thick doubly drained samples indicate the time for 50% consolidation completed as t50 = 10.5 min for a load increment close to that of the loaded clay layer. Compute the effective stress in the clay layer at a depth of 16 m below the ground surface 3.5 years after the application of the load.
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