Q2. A soil profile consisting of three layers is shown in Figure 1 below. Unit weight of water (yw) = 9.81 kN/m³ Layer no. 1 2 3 H₂ H₂ Dry sand Sand Clay Rock Figure 1: Soil Profile Thickness H₁ = 1.5 m H₂ = 2.53 m H3 = 2.64 m Layer 1 Groundwater table Layer 2 Layer 3 Soil parameters Yd = 16.5 kN/m³, Ysat = 17.42 kN/m³ Yd = 16.5 kN/m³, Ysat = 18.55 kN/m³ Yd = 17.50 kN/m³, Ysat = 19.23 kN/m³ a) Calculate the values of o, u and o' at points A, B, C and D. b) Calculate the effective stress at C when water table drops by 2 m. c) Calculate the effective stress at C when water table rises by 1 m above layer 1 due to flooding.
Q2. A soil profile consisting of three layers is shown in Figure 1 below. Unit weight of water (yw) = 9.81 kN/m³ Layer no. 1 2 3 H₂ H₂ Dry sand Sand Clay Rock Figure 1: Soil Profile Thickness H₁ = 1.5 m H₂ = 2.53 m H3 = 2.64 m Layer 1 Groundwater table Layer 2 Layer 3 Soil parameters Yd = 16.5 kN/m³, Ysat = 17.42 kN/m³ Yd = 16.5 kN/m³, Ysat = 18.55 kN/m³ Yd = 17.50 kN/m³, Ysat = 19.23 kN/m³ a) Calculate the values of o, u and o' at points A, B, C and D. b) Calculate the effective stress at C when water table drops by 2 m. c) Calculate the effective stress at C when water table rises by 1 m above layer 1 due to flooding.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Q2. A soil profile consisting of three layers is shown in Figure 1 below.
Unit weight of water (yw) = 9.81 kN/m³
Layer no.
1
2
3
↑
H₁
H₂
Dry sand Sand Clay Rock
Figure 1: Soil Profile
Thickness
H₁ = 1.5 m
H₂ = 2.53 m
H3 = 2.64 m
Layer 1
Groundwater table
Layer 2
Layer 3
Soil parameters
Yd = 16.5 kN/m³, Ysat = 17.42 kN/m³
Ya = 16.5 kN/m³, Ysat = 18.55 kN/m³
Yd = 17.50 kN/m³, Ysat = 19.23 kN/m³
a) Calculate the values of o, u and o' at points A, B, C and D.
b) Calculate the effective stress at C when water table drops by 2 m.
c) Calculate the effective stress at C when water table rises by 1 m above layer 1 due to flooding.
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