Answered: Assume the curve shown in Figure 14.14…

Assume the curve shown in Figure 14.14 has been obtained from a static load test on a 60 ft long, PP18 X 0.375 pile. Using Davisson method, compute the nominal downward axial load capacity.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter18: Pile Foundation

Section: Chapter Questions

Problem 18.4P: A 400-mm diameter and 15 m long concrete pile is driven into a sand where = 18.0 kN/m3 and = 31....

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Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

Assume the curve shown in Figure 14.14 has been obtained from a static load test on a 60 ft long,
PP18 X 0.375 pile. Using Davisson method, compute the nominal downward axial load capacity.
Applied Downward Load, P (kN)
500
1000
10
40
50
Settlement, 8 (mm)
20

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Determine the maximum load that can be allowed on a 450 mm diameter driven pile shown in Figure P12.6, allowing a factor of safety of 3. Use K = 1.5 Ko and = 0.65 in computing the shaft load. Use Meyerhofs method for computing the point load.
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QUESTION 5 Calculate the load bearing capacity of the pile shown in Figure Q5. Assume that it is a bored pile, and state other assumptions made. 0.6 m Firm Clay Y. = 18KN/m2 = 40 kPa 3m Stiff Clay Y, = 19kN/m³ Cu = 110 kPa 2.5m WT 13m Dense Gravel Y. = 21kN/m² o' = 37° 15m Figure Q5
Q1...(d,e)
6) A 2-ft x 2-ft square concrete pile is shown. Ignore the resistance of the soft clay. Assume Na 10. For a safety factor of 3.0, the allowable load capacity of the pile is most nearly: a. 344 kips b. 169 kips c. 128 kips d. 225 kips 5 ft 30 ft R SOFT CLAY y=120 pcf SAND Y = 115 pcf =32°
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Answer both parts
Curve in the figure has been obtained from a static load test on a 60 ft long, 12-in circular solid concrete pile. Using Davisson method, compute the nominal downward axial load capacity. Hint: units should be consistent. Settlement, & (mm) 10 20 30 40 50 60 70 0 Applied Downward Load, P (kN) 500 1000 1500