A 1.5 mx 1.5 m footing is carrying a 400 kN load as shown in the figure below. Depth (m) 0.0 1.0 2.0 3.5 Df 6.0 77 Groundwater Sandy table soil (Yw9.81 kN/m³): Stiff Clay (OCR = 2) Bedrock Yt 16.5 kN/m³ E = 9,000 kPa Ysat 17.5 kN/m³. E 15,000 kPa Ysat 18.0 kN/m³ eo= 0.8 Cc = 0.15, C₁ = 0.02 Eu = 40,000 kPa (a) Estimate the immediate settlement beneath the center of the footing. Assuming that Poisson's ratios of sand and soft clay are 0.3 and 0.5, respectively. Use numerical integration approach. For the calculations, use layers (below the bottom of the footing) of thicknesses: 1 m; 1.5 m, and 2.5 m. (b) Determine the primary consolidation settlement beneath the center of the footing. Note: Use the 2:1 method to determine the stress increase below the footing.
A 1.5 mx 1.5 m footing is carrying a 400 kN load as shown in the figure below. Depth (m) 0.0 1.0 2.0 3.5 Df 6.0 77 Groundwater Sandy table soil (Yw9.81 kN/m³): Stiff Clay (OCR = 2) Bedrock Yt 16.5 kN/m³ E = 9,000 kPa Ysat 17.5 kN/m³. E 15,000 kPa Ysat 18.0 kN/m³ eo= 0.8 Cc = 0.15, C₁ = 0.02 Eu = 40,000 kPa (a) Estimate the immediate settlement beneath the center of the footing. Assuming that Poisson's ratios of sand and soft clay are 0.3 and 0.5, respectively. Use numerical integration approach. For the calculations, use layers (below the bottom of the footing) of thicknesses: 1 m; 1.5 m, and 2.5 m. (b) Determine the primary consolidation settlement beneath the center of the footing. Note: Use the 2:1 method to determine the stress increase below the footing.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A 1.5 m x 1.5 m footing is carrying a 400 kN load as shown in the figure below.
Depth (m)
0.0
1.0
2.0
3.5
6.0
Df
P
Groundwater
table
(w 9.81 kN/m³):
Stiff Clay
(OCR = 2)
Sandy
soil
Bedrock
Yt 16.5 kN/m³
E = 9,000 kPa
Ysat 17.5 kN/m³
E = 15,000 kPa
Ysat 18.0 kN/m³
eo = 0.8
Cc = 0.15, C₂
= 0.02
Cr
Eu = 40,000 kPa
น
Сс
=
(a) Estimate the immediate settlement beneath the center of the footing. Assuming that
Poisson's ratios of sand and soft clay are 0.3 and 0.5, respectively. Use numerical
integration approach. For the calculations, use layers (below the bottom of the footing) of
thicknesses: 1 m; 1.5 m, and 2.5 m.
(b) Determine the primary consolidation settlement beneath the center of the footing.
Note: Use the 2:1 method to determine the stress increase below the footing.
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