DATA:

Diameter of pile= 300 mm

fck= 30 N/mm2

fy= 415 N/mm2

Cover= 40 mm

Depth= 6000 mm

Live load= 1617.2 KN

LOAD CALCULATION:

Self weight of pile=(π*d2*l*24)/4

= 10.1736 KN

Total load= D.L+L.L

= 1627.374 KN

Load including impact factor=1.1*T.L

= 1790.111 KN

Service load on pile=T.L/4

= 406.8434 KN

Design load= serviceload *1.5

= 610.2651 KN

LONGITUCINAL REINFORCEMENT:

Pu = 0.4fck*Ag+(0.67fy-0.4fck)Asc

Asc= -892.8205 (Area never be negative)

minimum reinforcement=0.0125*area of cross section

Asc= 883.125 mm2

dia of bar= 16 mm

no of bars = 4.394531

therfore provide 5 nos

LATERAL REINFORCEMENT(ties):

Dia of rod= 10 mm

volume of one tie= 69080 mm3

if pitch of the tie is p

the volume of pile per pitch length=.2%area of cross section *p

= 488.8889 mm

maximum permissible pitch= D/2= 150 mm

Provide 10mm diameter bars ties at 150mm centres.

LATERAL REINFORCEMENT NEAR PILE HEAD:

spiral reinforcement is provided in the core of the pile head is

DESIGN OF PILE

3D= 900 mm

volume of the spiral per length=0.6 %of area of cross section

= 423.9 mm3

dia of rod= 10 mm

ast of rod= 78.5 mm2

circumference= 180

if the pitch of spiral diameter of spiral is

p=cicumference of spiral*Ast of rod /volume of spiral

p= circumference*As/volume of spiral

p= 33.33 mm

provide 10mm diameter rod spiral at a pitch of 30mmc/c for

a length 900mm near pile head

LATERAL REINFORCEMENT NEAR PILE END:

spiral reinforcement is provided in the core of the pile end is

3D= 900 mm

volume of spiral= 69080 mm3

dia of rod= 10 mm

AS= 78.5 mm2

if the pitch of spiral diameter of spiral is

p= volume/6%0f cross section

= 162.963 mm

provide 10mm diameter rod spiral at a pitch of 50mmc/c for

a length 900mm near pile end the spiral is enclosed inside of

the main reinforcement

SPACER AND LIFTING HOLES:

Provide spacer in pair of steel using 32mm dia bar spacer

at 3000mm centres Provide 32mm diameter holes at3000mm

from pile end