Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 2, Problem 2.11P
To determine
Find the void ratio and unit weight of the soil.
Find the effective stress, total stress, and pore water pressure at the 5 m depth into the bottom of the lake.
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A soil profile consists of sand (6-m thick) which overlies a layer of clay (5-m thick). The groundwater table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer?
For sand layer: Void Ratio = 0.72, Specific gravity = 2.61, Degree of Saturation = 0.6
For clay layer: Void Ratio = 0.99, Specific gravity = 2.72
Round off to two decimal places.
The depth of water in a lake is 4 m. The soil at the bottom of thelake consists of sandy clay. The water content of the soil wasdetermined to be 25.0%. The specific gravity of the soil grainsis 2.70. Determine the void ratio and the unit weight of the soil.What would be the total stress, effective stress, and pore waterpressure at the 5 m depth into the bottom of the lake?
Question 20
A soil profile consists of sand (5-m thick) which overlies a layer of clay (9-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer?
For sand layer: Void Ratio = 0.82, Specific gravity = 2.68, Degree of Saturation = 0.6
For clay layer: Void Ratio = 0.92, Specific gravity = 2.86
Round off to two decimal places.
Chapter 2 Solutions
Principles of Foundation Engineering (MindTap Course List)
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