Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 5.9QPP
A steel pile foundation with a cross-sectional area of
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How does the effective stress method is considered superior from the total stress method for studying the load-support capacity of piles?
Explain the difference between a rigid analysis and a nonrigid analysis for lateral pile
loading. Think about soil-structure interaction.
Problem 3:
You have been assigned to check the geotechnical capacity of a concrete pile foundation designed by your
colleague. The design drawing shows 27m long 600mm diameter concrete piles. The specified end bearing
capacity is 3000 kPa (ULS). The total factored ULS load on the pile is 2210 kN. The geotechnical engineer
specified the following parameters:
End bearing reduction factor =0.95
Skin group reduction factor = 0.9
ULS geotechnical resistance factor = 0.6
Elevation (m)
Ultimate unit
From
То
skin friction
(КРa)
15
1106
1104.5
1102.5
1104.5
35
Check if the pile has adequate geotechnical capacity.
1102.5
1092
45
1092
1085.5
55
1085.5
1083
70
1083
1080
110
1080
1076
230
Chapter 5 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 5 - The second paragraph of this chapter argues that a...Ch. 5 - Why would the AASHTO separate structural dead...Ch. 5 - A proposed column has the following design loads:...Ch. 5 - Prob. 5.4QPPCh. 5 - A proposed column has the following design...Ch. 5 - Prob. 5.6QPPCh. 5 - A certain foundation will experience a bearing...Ch. 5 - A bridge foundation has a nominal load capacity of...Ch. 5 - A steel pile foundation with a cross-sectional...Ch. 5 - A timber pile 400 mm in diameter is subjected to...
Ch. 5 - A seven-story steel-frame office building will...Ch. 5 - A two-story reinforced concrete art museum is to...Ch. 5 - A 40ft60ft one-story agricultural storage building...Ch. 5 - A sandy soil has 0.03 percent sulfates. Evaluate...Ch. 5 - A certain clayey soil contains 0.30 percent...Ch. 5 - A series of 50 ft long steel piles are to be...Ch. 5 - Prob. 5.17QPPCh. 5 - Prob. 5.18QPPCh. 5 - Prob. 5.19QPPCh. 5 - Prob. 5.20QPPCh. 5 - You are designing a pedestrian bridge to cross a...
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- A timber pile 400 mm in diameter is subjected to the following axial compressive loads: dead =600 kN, live = 250 kN, earthquake = 200 kN. If the allowable compressive stress in the pile usingASD methods is 8.28 MPa, is this pile adequate?arrow_forwardWhat is the pile bearing capacity if the Downward drag = 0.6 psi, h1 = 30', h2 = 4', Frictional stress = 3.5psiAxial stress = 250psi.arrow_forwardA concrete pile of size 50 cm x 50 cm is to be provided in a clay stratum whose unconfined compressive strength is 110 kPa. Compute the minimum length of pile required to carry safe working load of 450 kN with a factor of safety 2.5. Assume adhesion factor as 0.6.arrow_forward
- a 15-meter precast concrete pile is to be lifted. if the unit weight of concrete is 23.54 kN/m3. And the section of the pile measures 400 mm by 400 mm.arrow_forward3. Determine the allowable end bearing resistance of a 16" x 16" square pile bearing in a clay material 40 feet below the surface. The clay has a unit weight of 115 pcf and undrained shear strength of 2500 psf. Assume a factor of safety of 3.0 is required.arrow_forwardQ2/What are the Classification of Piles According to Method of Construction?arrow_forward
- Describe the factors of safety for design of piles.arrow_forwardA proposed highway bridge will be supported by 180 piles, each about 18 m long. The design load per pile is greater than 1000 kN. The soil conditions are neither unusually good, nor unusually bad, and you have limited experience with other pile foundations in the area. Based on this limited information, determine the number of pile load tests required for this project. State the main objectives of pile load tests.arrow_forwardA large sign is to be supported on two steel poles, each of which will be supported by an 18 in diameter drilled shaft. The lateral wind load acting on the sign will be 3,000 lb and distributed evenly between the two piles. The centroid of this wind load will be 30 ft above the ground surface. The soils are sandy clays with su = 2,500 lb/ft2. Using a rigid analysis, compute the required depth of embedment and the maximum moment in each drilled shaft. Use a factor of safety of 3.0.arrow_forward
- An engineer is designing a deep foundation at a site underlain with loose to medium dense sandy silt and silty sand. Three pile types are being considered: driven prestressed concrete piles, PIFs, and drilled displacement piles. Discuss the advantages and disadvantages of each type.arrow_forwardc) Discuss the importance of composite piles in the construction of foundation of structures.arrow_forwardEvaluate the resisting capacity against axial load due to skin friction of a concrete pile embedded into a layer of plastic clay given the following conditions: Size of pile = 0.4 m. square Depth of penetration into clay layer = 20 m. Unconfined compression strength qu of the clay = 200 kPa %3Darrow_forward
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