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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Chapter 15, Problem 15.6QPP
Using the data in Problem 15.5 and the AASHTO resistance factors, compute
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State the method to determine the N-value of soil and the normal N-value required for supporting friction piles
Asteel pipe pile having a diameter of 0.35 m is driven 15 m into a loose sand with a unit weight of 16.5 kN/m3 and an angle of internal friction of 33°. Compute the design axial downward loading, using the effective stress basic method of statical analysis with a factor of safety of 2.75.
cantilever sheet pile shown. below, determine:
A)the depth of embedment (d).
B)the maximum moment.
Chapter 15 Solutions
Foundation Design: Principles and Practices (3rd Edition)
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- A sheet pile wall will be constructed in a sandy lakebed. The groundwater level will be decreased to the excavation level in front of the wall. Dimensions are given in the figure. Within the scope of site investigations, CPT is conducted, and the test results are given. Please calculate the design depth, D, and the maximum bending moment that the wall is exposed. If the wall is designed as the single anchored sheet pile wall behaving as the free earth support system, what would be the new design height of the wall? (You should place the anchor force to the wall face at a proper depth). A=2 B=4arrow_forwardUnder what circumstances would bearing capacity most likely control the design of spreadfootings? Under what circumstances would settlement usually control?arrow_forwardDiscuss in detail with the help of diagram, the load transfer mechanism in skin resistance-end bearing piles. Subject: Geotechnical designarrow_forward
- Given: γ =17.5 kN/m3c = 30 kN/m2center-to-center spacing of struts in the plan = 5 m. Determine the sheet-pile section modulus for the braced cut. Use σ all = 170 MN/m2arrow_forwardDefine the Normalized Load-Settlement Data for Medium Footing Load Tests ?arrow_forwardDescribe the load deformation response of deepfoundations ?arrow_forward
- A rectangular footing is acted by a vertical load of 8060 kN and two horizontal forces of 1500kN in both the long and the short directions with a distance of 0.6m from the ground surface. Determine: a) The base pressure at the four corners if the footing was on soil. b) Pile loads at the four corners if the footing was on piles whose pattern as shown.arrow_forwardA frictional pile with a circular cross-section (diameter = D) is pushed into the soil to a distance (L) and then it is subjected to an axial force (P) on its top end. Derive a formula to calculate the normal stress in any section x.arrow_forwardA sheet pile wall is driven to a depth of 6 m into a permeable sand layer (k = 6X10-3 mm/s) of 13.5 m thickness lying on an impermeable layer. The water on one side of the wall is at a height of 4.5 m, while on the other side, pumps maintain the water level at ground level. Estimate the number of flow linesarrow_forward
- 1. A soil anchor 12" in diameter is placed in soil having shear strength of 2.1 tons/sq. ft. The anchorage length is 35 ft. behind the slip plane. Using a factor of safety of 2.0, what is the safe working capacity of the soil anchor based on the shear strength of the soil?arrow_forwardA circular pile having a diameter of 0.35 m is embedded through a layer of 4.5 m thick of clay layer into a dense sand having a bearing capacity factor of 78. Unit weight of clay is 16 kN/m3 and saturated unit weight of sand is 18 kN/m3. Water table is located at the top of the sand layer. Lateral pressure factor of compression K = 1.20 and coefficient of friction of concrete pile is 0.42. The allowable capacity 600 kN. Using a factor of safety of 3. Determine the effective vertical stress at the critical depth.arrow_forwardRedo Problem 14.1 with the following: L1 = 3m, L2 = 6 m, γ = 17.3 kN/m3, γsat = 19.4 kN/m3, and ϕ′ = 30°. 14.1 Figure P14.1 shows a cantilever sheet-pile wall penetrating a granular soil. Here, L1 = 4 m, L2 = 8 m, γ = 16.1 kN/m3, γsat = 18.2 kN/m3, and ϕ′ = 32°. What is the theoretical depth of embedment, D? For a 30% increase in D, what should be the total length of the sheet piles? Determine the theoretical maximum moment of the sheet pile.arrow_forward
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