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
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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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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