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. Please refer to the module 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.
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. Please refer to the module
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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