DYWIDAG Ductile Iron Piles

System

Advantages and Characteristics

The pile system consists of driven ductile centrifugally cast pipes with conical couplers. Depending on the soil conditions, the ductile cast iron piles will be used as peak pressure or frictional piles.

 

  • very fast and almost vibrationless pile production
  • control of load capacity through correlation with driving rate
  • can be used as permanent pile
  • easy adaption of the pile length to different soil conditions
  • no waste cuttings
  • no reworking of the pile heads necessary
  • light and easily moveable equipment allows pile production under limited space conditions
  • small site equipment enables fast use



Interior load capacity of the DYWIDAG Ductile iron pile acc. to approval by DIBt (German Institute for Structural Engineering)

 

type of pile exterior diameter wall thickness cast iron cross section concrete cross section load capacity cast iron load capacity concrete B25 load capacity pile
ø x s [mm] [mm] [cm2]* [cm2] [kN]* [kN] [kN]
118x7.5118.00 7.50 20.55 83.32 438 69 507
118x9.0118.00 9.00 25.33 78.54 540 65 605
118x10.6118.00 10.60 30.26 73.59 646 61 707
170x9.0170.00 9.00 37.58 181.46 800 151 951
170x10.6170.00 10.60 45.14 173.90 962 144 1.106
* considering the corrosion rate

Material properties

Course of the Strain Lines:
Cast iron with lamellar graphite (gray cast iron = GG) Cast iron with spheroidal graphite (ductile cast iron = GGG)

Cast Iron with Spheroidal Graphite (GGG)
In the melted cast iron mass, graphite is converted from a tapered lamellar shape (gray cast iron) into a spheroidal shape (ductile cast iron). Thus, the mechanical characteristics are significantly changed, strength is increased and the material becomes more ductile.

Relation of the Work Lines:
GG-10 | St37 | GGG-40

Properties GGG-40

Rm, tensile strengthmin. 420 N/mm2Brinell hardnessmax. 230 HB
0,2% - elongation limitmin. 300 N/mm2modulus of electricity160,000 N/mm2
elongation at maximum loadmin. 10%density7.05 g/cm3

Ø 118

nom. S weight
7,5 105 kg ± 7 kg
9,0 123 kg ± 7 kg
10,6 142 kg ± 7 kg


Ø 170

nom. S weight
9,0 186 kg ± 10 kg
10,6 213 kg ± 10 kg

Pile Production
The piles are produced using rapid percussion hammers. The first pipe length is fitted with a ram shoe and driven into the soil. The subsequent pipe lengths are driven into the conical couplers of the pile driven before.

The final pile length will be determined based on the penetration resistance.