Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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Elevation (m)
CIVL-3550
Geotechnical Engineering I
Fall 2024
Civil and Environmental Engineering
University of Windsor
Tutorial 5
December 3, 2024
If the unit load obtained by dividing the weight of the Tower of Pisa by the plan area of
the foundation were applied as an infinite load, we would have the case of one-
dimensional compression. How much consolidation would take place? Use the
information below to estimate the total consolidation.
"
15
10
Weight of tower: 142,000 kN
Diameter of foundation: 19.58 m
Embedment depth: 3 m below ground surface
Water table: 1 m below ground surface
← N
0
10
5
Sandy and clayey silts
-5
Upper sand layer
-10
-15
-20
22
Upper clay layer
Intermediate clay layer
Intermediate sand layer
-25
-30
Lower clay layer
-35
-40
-45
Lower sand layer
-50
Figure 6.29 Soil profile at the Tower of Pisa site (Jamiolkowski 2006).
WT
Sea level
Layer C
Layer B
Layer A
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Transcribed Image Text:Elevation (m) CIVL-3550 Geotechnical Engineering I Fall 2024 Civil and Environmental Engineering University of Windsor Tutorial 5 December 3, 2024 If the unit load obtained by dividing the weight of the Tower of Pisa by the plan area of the foundation were applied as an infinite load, we would have the case of one- dimensional compression. How much consolidation would take place? Use the information below to estimate the total consolidation. " 15 10 Weight of tower: 142,000 kN Diameter of foundation: 19.58 m Embedment depth: 3 m below ground surface Water table: 1 m below ground surface ← N 0 10 5 Sandy and clayey silts -5 Upper sand layer -10 -15 -20 22 Upper clay layer Intermediate clay layer Intermediate sand layer -25 -30 Lower clay layer -35 -40 -45 Lower sand layer -50 Figure 6.29 Soil profile at the Tower of Pisa site (Jamiolkowski 2006). WT Sea level Layer C Layer B Layer A
Table 6.5 Gradation of soil layers at the Tower of Pisa site
Formation
Layer
Soil type
A1
Sandy-clayey silts
A
A₂
Silty sands
B₁
Upper clays
Sublayer
Elevation of top
Elevation of base
Sand (%)
Silt (%)
Clay (%)
0.0
-5.4
30.1
56.7
12.5
-5.4
-7.4
56.4
30.3
13.2
1
-7.4
-10.9
14.2
32.2
53.0
2
-10.9
-12.9
2.2
51.9
46.0
3
-12.9
-17.8
2.0
37.7
60.0
4
-17.8
-19.0
6.6
48.1
44.6
B₂
Intermediate clays
5
-19.0
-22.0
16.3
51.4
33.0
B
B₁₂
Intermediate sands
6
-22.0
-24.4
57.7
33.6
8.6
7
-24.4
-29.0
2.8
50.0
47.3
8
-29.0
-30.4
12.7
53.7
33.7
B4
Lower clays
9
-30.4
-34.4
6.4
62.7
31.5
10
с
Lower sands
-34.4
-37.0
-37.0
1.3
52.5
46.3
-68.0
82.5
11.9
5.5
The case history continues at the end of Chapter 9, where we provide more information about the soil profile and explore the likely reason for the initiation of the tower lean.
Table 6.4 Approximate soil profile at the Tower of Pisa site
Formation Layer Soil type
Sublayer Elevation of top Elevation of base y (kN/m³) LL (%) PI (%) wc (%) LI
A₁
Sandy-clayey silts
0.0
-5.4
18.9
35.0
A
A2
Silty sands
-5.4
-7.4
18.1
12.9 30.9 0.68
37.3
1
-7.4
-10.9
17.0
73.1
42.7 50.7 0.56
B1
Upper clays
2
-10.9
-12.9
17.5
59.2
32.7 46.5 0.73
3
-12.9
-17.8
16.7
70.9
41.3 56.3 0.72
4
-17.8
-19.0
19.5
53.2 33.3
27.7 0.27
B₂
Intermediate clays
5
-19.0
-22.0
19.8
46.3
22.8 27.4 0.15
B
B3
Intermediate sands 6
-22.0
-24.4
19.1
33.0
8.6 29.4
7
-24.4
-29.0
18.6
59.7
33.9 38.5 0.41
8
-29.0
-30.4
18.4
48.9
22.6 37.1 0.57
B4
Lower clays
9
-30.4
-34.4
19.0
54.5
31.0 32.5 0.21
10
-34.4
-37.0
19.4
51.3
29.0
31.2
0.34
C
Lower sands
-37.0
-68.0
20.5
20.6
Source: Data from Jamiolkowski (2006).
Layer
В1
B2
B3
OCR
6
2.5
-
1.25
B4
Assume Gs = 2.67 for all clay layers
Use the equations below to estimate Cc and Cs.
1
Сс
-G(PI)
200
C₁ = 0.2C
expand button
Transcribed Image Text:Table 6.5 Gradation of soil layers at the Tower of Pisa site Formation Layer Soil type A1 Sandy-clayey silts A A₂ Silty sands B₁ Upper clays Sublayer Elevation of top Elevation of base Sand (%) Silt (%) Clay (%) 0.0 -5.4 30.1 56.7 12.5 -5.4 -7.4 56.4 30.3 13.2 1 -7.4 -10.9 14.2 32.2 53.0 2 -10.9 -12.9 2.2 51.9 46.0 3 -12.9 -17.8 2.0 37.7 60.0 4 -17.8 -19.0 6.6 48.1 44.6 B₂ Intermediate clays 5 -19.0 -22.0 16.3 51.4 33.0 B B₁₂ Intermediate sands 6 -22.0 -24.4 57.7 33.6 8.6 7 -24.4 -29.0 2.8 50.0 47.3 8 -29.0 -30.4 12.7 53.7 33.7 B4 Lower clays 9 -30.4 -34.4 6.4 62.7 31.5 10 с Lower sands -34.4 -37.0 -37.0 1.3 52.5 46.3 -68.0 82.5 11.9 5.5 The case history continues at the end of Chapter 9, where we provide more information about the soil profile and explore the likely reason for the initiation of the tower lean. Table 6.4 Approximate soil profile at the Tower of Pisa site Formation Layer Soil type Sublayer Elevation of top Elevation of base y (kN/m³) LL (%) PI (%) wc (%) LI A₁ Sandy-clayey silts 0.0 -5.4 18.9 35.0 A A2 Silty sands -5.4 -7.4 18.1 12.9 30.9 0.68 37.3 1 -7.4 -10.9 17.0 73.1 42.7 50.7 0.56 B1 Upper clays 2 -10.9 -12.9 17.5 59.2 32.7 46.5 0.73 3 -12.9 -17.8 16.7 70.9 41.3 56.3 0.72 4 -17.8 -19.0 19.5 53.2 33.3 27.7 0.27 B₂ Intermediate clays 5 -19.0 -22.0 19.8 46.3 22.8 27.4 0.15 B B3 Intermediate sands 6 -22.0 -24.4 19.1 33.0 8.6 29.4 7 -24.4 -29.0 18.6 59.7 33.9 38.5 0.41 8 -29.0 -30.4 18.4 48.9 22.6 37.1 0.57 B4 Lower clays 9 -30.4 -34.4 19.0 54.5 31.0 32.5 0.21 10 -34.4 -37.0 19.4 51.3 29.0 31.2 0.34 C Lower sands -37.0 -68.0 20.5 20.6 Source: Data from Jamiolkowski (2006). Layer В1 B2 B3 OCR 6 2.5 - 1.25 B4 Assume Gs = 2.67 for all clay layers Use the equations below to estimate Cc and Cs. 1 Сс -G(PI) 200 C₁ = 0.2C
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