Three columns x four rows of group piles are installed into a uniform clay layer. Clayey soil: Isat = 21.0 kN/m3, c = 40 kPa, Nc=7.5, Q=0.74 %D %3D Piles: Diameter d=0.3m, L=50m, pile spacing = 0.75m, pile edge distance=D0.45m (not shown in figure); f'c=35 MPa, db=20mm; fy=275 MPa %3D Pilecap : Effective Depth=550mm; f'c=30 MPa; db=28mm; fy=420 MPa Column : 500x500; f'c=28 MPa; db=32mm; fy=420 MPa Use a Factor of Safety of 4 Assuming the column and the pile cap has the same location of COG, and that the factored load acting on the column is 8580 kN, calculate the following: Applied Load, Q Pile Сap Side Friction A (B) Plan View Tip Bearing A
Three columns x four rows of group piles are installed into a uniform clay layer. Clayey soil: Isat = 21.0 kN/m3, c = 40 kPa, Nc=7.5, Q=0.74 %D %3D Piles: Diameter d=0.3m, L=50m, pile spacing = 0.75m, pile edge distance=D0.45m (not shown in figure); f'c=35 MPa, db=20mm; fy=275 MPa %3D Pilecap : Effective Depth=550mm; f'c=30 MPa; db=28mm; fy=420 MPa Column : 500x500; f'c=28 MPa; db=32mm; fy=420 MPa Use a Factor of Safety of 4 Assuming the column and the pile cap has the same location of COG, and that the factored load acting on the column is 8580 kN, calculate the following: Applied Load, Q Pile Сap Side Friction A (B) Plan View Tip Bearing A
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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1. Ultimate Capacity of the pile group considering single pile analysis, kN
2. Allowable Capacity of the pile group considering block action analysis, kN

Transcribed Image Text:Three columns x four rows of group piles are
installed into a uniform clay layer.
Clayey soil: 7sat = 21.0 kN/m3 , c = 40 kPa, Nc=7.5,
a=0.74
Piles: Diameter d=0.3m, L=50m, pile spacing =
0.75m, pile edge distance=0.45m (not shown in
figure); f'c=35 MPa, db=20mm; fy=275 MPa
Pilecap : Effective Depth=550mm; f'c=30 MPa;
db=28mm; fy=420 MPa
Column : 500x500; f'c=28 MPa; db=32mm; fy=420
МPа
Use a Factor of Safety of 4
Assuming the column and the pile cap has the same
location of COG, and that the factored load acting on
the column is 8580 kN, calculate the following:
Applied Load, Q
Pile
Саp
В
Side
Friction
A
(B) Plan View
Tip
Bearing
(a) Side View
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