A soil profile is shown in figure below. A uniformly distributed load, q=200 kPa, is applied at the ground surface. Calculate the primary consolidation settlement of the clay layer. Assume the following: The thickness of the top sand layer is 1 m. The thickness of the clay layer is 3 m. For sand, y=15 kN/m³. For clay, Ysat=19 kN/m², and cv=3.0x10“ m²/min (consolidation coefficient). The bottom figure (e-log pressure) is obtained from a 1-D consolidation test performed on a clay specimen from the middle of the clay layer. Water Level Ground Water h = Table Sand Layer Clay Layer Standpipe Sand Layer 1.20 1.10 1.00 0.90 0.80 0.70 0.60 10 100 1000 10000 Pressure, kPa Void Ratio
A soil profile is shown in figure below. A uniformly distributed load, q=200 kPa, is applied at the ground surface. Calculate the primary consolidation settlement of the clay layer. Assume the following: The thickness of the top sand layer is 1 m. The thickness of the clay layer is 3 m. For sand, y=15 kN/m³. For clay, Ysat=19 kN/m², and cv=3.0x10“ m²/min (consolidation coefficient). The bottom figure (e-log pressure) is obtained from a 1-D consolidation test performed on a clay specimen from the middle of the clay layer. Water Level Ground Water h = Table Sand Layer Clay Layer Standpipe Sand Layer 1.20 1.10 1.00 0.90 0.80 0.70 0.60 10 100 1000 10000 Pressure, kPa Void Ratio
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter11: Compressibility Of Soil
Section: Chapter Questions
Problem 11.15P
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Transcribed Image Text:A soil profile is shown in figure below. A uniformly distributed load,
q=200 kPa, is applied at the ground surface. Calculate the primary consolidation
settlement of the clay layer. Assume the following: The thickness of the top sand layer is
1 m. The thickness of the clay layer is 3 m. For sand, y=15 kN/m³. For clay, ysat=19
kN/m³, and cv=3.0x106 m²/min (consolidation coefficient). The bottom figure (e-log
pressure) is obtained from a 1-D consolidation test performed on a clay specimen from
the middle of the clay layer.
Water Level
Ground
Water
u
h =
Table
Sand Layer
Clay Layer
Standpipe
Sand Layer
1.20
1.10
1.00
0.90
0.80
0.70
0.60
10
100
1000
10000
Pressure, kPa
Void Ratio
Transcribed Image Text:Refer to Problem 1. How long will it take for 70% primary
consolidation to take place (for the entire clay layer)?
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