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Structural Pile Design Guide

1. The document provides calculations to determine the depth of fixity (Zf) and maximum moment (Mf) of a 1.2m diameter reinforced concrete pile with a fixed head condition. 2. The depth of fixity is calculated to be 6.53m using parameters like pile diameter, modulus of elasticity, and a constant from annex C. 3. The maximum moment is calculated to be 983.81 kN-m. Reinforcement is designed for the pile to resist this moment. 4. Reinforcement provided is calculated to exceed the required area of reinforcement of 3516.80 mm^2.

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472 views4 pages

Structural Pile Design Guide

1. The document provides calculations to determine the depth of fixity (Zf) and maximum moment (Mf) of a 1.2m diameter reinforced concrete pile with a fixed head condition. 2. The depth of fixity is calculated to be 6.53m using parameters like pile diameter, modulus of elasticity, and a constant from annex C. 3. The maximum moment is calculated to be 983.81 kN-m. Reinforcement is designed for the pile to resist this moment. 4. Reinforcement provided is calculated to exceed the required area of reinforcement of 3516.80 mm^2.

Uploaded by

karthikmr85
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as XLSX, PDF, TXT or read online on Scribd
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PILE DESIGN

DETERMINATION OF DEPTH OF FIXITY(Zf) FOR FIXED HEAD CONDITION


DIA OF PILE, D 1.20 m
GRADE OF CONCRETE, fck 35.00 N/mm2
MODULUS OF ELASTICITY , E
MOMENT OF INERTIA, I 0.10 m4

ƞh (CONSTANT FOR DETERMINING T) 0.80 kN/m3*10^3

e (L1=e) 0.00 m

VALUE OF T FROM ANNEX C 5.19 M

VALUE OF e/T 0.00

VALUE OF LF/T CORRESPONDING TO L1 2.20

DEPTH OF FIXITY Zf 6.53 m

LATERAL PILE CAPACITY CORRESPONDING TO 8 mm DEFLECTION 301.32 KN


DETERMINATION OF MAXIMUM MOMENT IN PILE

Mf 983.81 kN-m

P 4054.00

FACTORED MOMENT 983.81 kN-m

MOMENT REDUCTION FACTOR 0.85

REDUCED MOMENT 836.24 kN-m


PILE DESIGN
ASSUMING 20 mm DIA BAR WITH 75 mm COVER FOR PILE
FOR BENDING ONLY
bar size 20 mm
no. fo bars 30
d 0.075 m
d/D 0.063

Pu/fckD2 0.08
Mu/fckD3 0.014

FROM CHART NO. 60 SP 16


p/fck 0.02
p 0.70 PERCENT
Area of reinforcement required 3516.80 mm2

Provided reinforcement is 14nos. Dia 12mm + 14nos. Dia 16mm upto


fixity length 4396.00 mm2
Provided reinforcement is 14 nos. Dia 16mm beyond fixity length 2813.44 mm2
REFERENCE

(FOR LOOSE SAND, SUBMERGED SOIL)


(TABLE 3 ANNEX C, IS 2911 PART 1
SECTION 2-2010)

CANTILEVER LENGTH ABOVE


GROUND/BED TO THE POINT OF LOAD
APPLICATION, IN m.

(E*I/ƞh)^(1/5)

FROM FIGURE 4 ANNEX C

DEPTH OF POINT TO THE FIXITY

AS PER STAAD OUTPUT

AS PER FIGURE 5A OF ANNEX C


4396
2814

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