Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Textbook Question
Chapter 18, Problem 18.14P
A steel pile (H-section; HP 360 × 1.491; see Table 18.1) is driven into a layer of sandstone The length of the pile is 18.9 m. Following are the properties of the sandstone:
Unconfined compression strength = qu(lab) = 78.7 MN/m2
Angle of friction = 36°
Using a factor of safety of 3, estimate the allowable point load that can be carried by the pile. Use Eq. (18.42).
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PILE FOUNDATIONS
Example: 32/2
A reinforced concrete pile 30ft long and 15 inches
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consistency. Laboratory tests on samples of undisturbed
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11.22 A concrete pile measuring 0.406 m X 0.406 m in cross section is 18.3 m long. It is
fully embedded in a layer of sand. The following is an approximation of the me-
chanical cone penetration resistance (q.) and the friction ratio (F) for the sand
layer. Estimate the allowable bearing capacity of the pile. Use FS = 4.
Depth below ground surface (m)
9. (kN/m²)
F, (%)
0-6.1
2803
2.3
6.1-13.7
3747
2.7
13.7-19.8
8055
2.8
A group pile in clay is shown in the figure below. Determine the maximum vertical load Qg
be applied if the allowable consolidation settlement of the pile group is set to be 0.17 m. Use the
2:1 stress distribution method to estimate the average effective stress in the clay layer.
can
Qg
3 m
Sand
Groundwater
y = 15.72 kN/m3
table
Sand
3 m
Ysat =
18.55 kN/m3
2.75 m
X 2.75 m
Group
plan
Normally consolidated clay
Ysat = 19.18 kN/m³
15 m
18 m
eo = 1
C.
= 0,8
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Chapter 18 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 18 - State whether the following are true or false. a....Ch. 18 - A 1500 kN load was applied on two 20 m long and...Ch. 18 - A 500 mm diameter and 20 m long concrete pile is...Ch. 18 - A 400-mm diameter and 15 m long concrete pile is...Ch. 18 - A 400 mm 400 mm square precast concrete pile of...Ch. 18 - Prob. 18.6PCh. 18 - Prob. 18.7PCh. 18 - Prob. 18.8PCh. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.10P
Ch. 18 - Redo Problem 18.10 using the method for...Ch. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.13PCh. 18 - A steel pile (H-section; HP 360 1.491; see Table...Ch. 18 - A concrete pile is 18 m long and has a cross...Ch. 18 - Prob. 18.16PCh. 18 - Prob. 18.17PCh. 18 - Prob. 18.18PCh. 18 - Prob. 18.19PCh. 18 - Figure 18.26a shows a pile. Let L = 20 m, D = 450...Ch. 18 - Refer to Figure 18.26b. Let L = 15.24 m, fill =...Ch. 18 - Prob. 18.22PCh. 18 - Figure 18.39 shows a 3 5 pile group consisting of...Ch. 18 - The section of a 4 4 group pile in a layered...Ch. 18 - Prob. 18.25PCh. 18 - Prob. 18.26CTP
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