Answered: A layer of saturated clay 5 m thick is…

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 2.24P

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P4: A layer of saturated clay 5 m thick is overlain by sand 4.0 m deep. The water table is 3 m below the top surface. The saturated unit weights of clay and sand are 18 kN/m3 and 20 kN/m3 respectively.
Above the water table, the unit weight of sand is 17 kN/m3. Calculate the effective pressures on a horizontal plane at a depth of 9 m below the ground surface. What will be the increase in the effective pressure at 9 m if the soil gets saturated by capillary, up to height of I m above the water table?

kN/m³. Calculate the effective pressures on a
horizontal plane at a depth of 9 m below the grou
surface. What will be the increase in the effecti
pressure at 9 m if the soil gets saturated by capillary
up to height of 1 m above the water table?
GL
Ysand = 17 kN/m³
Y sat sand
=20 kN/m³
Ysat clay
=18 kN/m3
case (1)
Y = 17 kN/m3
Capillary zone
1 m
Yoat =20 kN/m³
=18 kN/m
Y sa e
clay
case (2)
Fug

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