SPUN PILE TYPE & SPECIFICATION

Spun pile is a type of precast concrete pile that uses prestressed concrete to improve its strength. It is produced by a centrifugal process with a range between 20g and 30g to improve the concrete strength comparing to square piles. It is less permeable which works to protect the pile from air and chloride, and not to cause the rust. This type of concrete is suitable for using in special conditions such as river, marine or high chloride soil.

Reference: MS 1314 Part-4

Classification of spun piles

Type of Pile	Class	Minimum 28 Days Concrete Strength (N/mm2)	Minimum Effective Prestress (N/mm2)	Minimum Cement Content (Kg/m3)	Type of Driving
Spun Pile	A	60	4.0	420	Hammar Driving
	B	60	5.0	420
	C	60	7.0	420

 

Standard Size and length of Spun pile

Outside Diameter	Class of Pile	Nominal Thickness	Length of Pile (m)
(mm)		(mm)	6	9	12	15	18
250	B	55	√	√	√
300	A	60	√	√	√	√
	B	60	√	√	√	√
350	A	60	√	√	√	√
	B	60	√	√	√	√	√
400	A	65	√	√	√	√	√
	B	65	√	√	√	√	√
	C	65	√	√	√	√	√
450	A	70	√	√	√	√	√
	B	70	√	√	√	√	√
	C	70	√	√	√	√	√
500	A	80	√	√	√	√	√
	B	80	√	√	√	√	√
	C	80	√	√	√	√	√
600	A	90	√	√	√	√	√
	B	90	√	√	√	√	√
	C	90	√	√	√	√	√
700	A	100	√	√	√	√	√
	B	100	√	√	√	√	√
	C	100	√	√	√	√	√
800	A	110	√	√	√	√	√
	B	110	√	√	√	√	√
	C	110	√	√	√	√	√
900	A	120	√	√	√	√	√
	B	120	√	√	√	√	√
	C	120	√	√	√	√	√
1000	A	130	√	√	√	√	√
	B	130	√	√	√	√	√
	C	130	√	√	√	√	√
1200	A	140	√	√	√	√	√
	B	140	√	√	√	√	√
	C	140	√	√	√	√	√

 

Spun Pile dimensions tolerances.

Description		Limits
Spun Pile Length	Up to 12 m	± 25 mm
	Exceeding 12 m	± 0.3 % of Cast Length
Cross Sectional	Nominal external diameter/size	(-) 3 mm to (+) 6 mm
	Wall thickness of hollow section	(-) 3 mm to (+) 10 mm

Straightness

Any face of pile shall not deviate by more than 6 mm from a straight edge 3 m long laid on the face.

The centroid of any cross section of the pile shall not deviate by more than 12 mm from the straight line connecting the centroids of the faces of the pile.

Handling

Pile segment should not be lifted off from mould unless it’s achieved the minimum cube strength of 30 N/mm2.

Lifting line marking at 0.2 times of the pile length from the ends of the pile and shall be provided only for pile exceeding 9 m length for the handling purpose.

Spun Pile Strength Test

• 28 Days Cube Strength as per IS-516
• Bending Strength of pile as per MS: 1314- Part 2

1. Pile Body strength

2. Pile Joint Strength