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PROBLEM 3: Four columns x Five rows of group piles are installed into a uniform clay layer. Clay soil: c=40 kPa, Nc=7.5 Piles: Diameter = 350mm, Length=35m, Pile to pile spacing (center to center)=0.90m, pile edge distance (center of pile to edge of pile cap) =0.75m Pile cap: Thickness=950mm, pile cover=100mm, clear cover=75mm, db=25mm. f'c=28 MPa, fy=420 MPa Hint: Effective depth is found by subtracting the pile cover, clear cover, and half of bar diameter to the thickness. a) Calculate the ultimate capacity of the pile using single pile analysis if alpha = 0.74 b) Calculate the ultimate capacity of the pile %3D using block action if alpha = 0.74 c) Determine the group efficiency using the calculated values above.

PROBLEM 3: Four columns x Five rows of group piles are installed into a uniform clay layer. Clay soil: c=40 kPa, Nc=7.5 Piles: Diameter = 350mm, Length=35m, Pile to pile spacing (center to center)=0.90m, pile edge distance (center of pile to edge of pile cap) =0.75m Pile cap: Thickness=950mm, pile cover=100mm, clear cover=75mm, db=25mm. f'c=28 MPa, fy=420 MPa Hint: Effective depth is found by subtracting the pile cover, clear cover, and half of bar diameter to the thickness. a) Calculate the ultimate capacity of the pile using single pile analysis if alpha = 0.74 b) Calculate the ultimate capacity of the pile %3D using block action if alpha = 0.74 c) Determine the group efficiency using the calculated values above.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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PROBLEM 3: Four columns x Five rows of group piles are installed into a uniform clay layer. Clay soil: c=40 kPa, Nc=7.5 Piles: Diameter = 350mm, Length=35m, Pile to %3D pile spacing (center to center)=0.90m, pile edge distance (center of pile to edge of pile cap) =0.75m Pile cap: Thickness=950mm, pile cover=100mm, clear cover=75mm, db=25mm. f'c=28 MPa, fy=D420 MPa Hint: Effective depth is found by subtracting the pile cover, clear cover, and half of bar diameter to the thickness. a) Calculate the ultimate capacity of the pile using single pile analysis if alpha = 0.74 b) Calculate the ultimate capacity of the pile using block action if alpha = 0.74 c) Determine the group efficiency using the calculated values above.
Transcribed Image Text:PROBLEM 3: Four columns x Five rows of group piles are installed into a uniform clay layer. Clay soil: c=40 kPa, Nc=7.5 Piles: Diameter = 350mm, Length=35m, Pile to %3D pile spacing (center to center)=0.90m, pile edge distance (center of pile to edge of pile cap) =0.75m Pile cap: Thickness=950mm, pile cover=100mm, clear cover=75mm, db=25mm. f'c=28 MPa, fy=D420 MPa Hint: Effective depth is found by subtracting the pile cover, clear cover, and half of bar diameter to the thickness. a) Calculate the ultimate capacity of the pile using single pile analysis if alpha = 0.74 b) Calculate the ultimate capacity of the pile using block action if alpha = 0.74 c) Determine the group efficiency using the calculated values above.
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