Olivier DPA

The Olivier DPA is set to redefine foundations, making traditional cylindrical FDP piles a thing of the past.

What is an Olivier DPA?

An Olivier DPA is an innovative, patented, cast-in-place drilled full displacement pile/inclusion made of reinforced concrete with a smooth to slightly uneven, spiral-like surface along the entire length of the cylindrical pile shaft. It relies primarily on end bearing and tip resistance for load-bearing capacity. It is installed without soil removal, making it ideal for both structural foundation piles and ground improvement (inclusions).

Key Benefits

  • Full soil displacement down to the bottom of the pile, including the pile base
  • No soil removal
    • Ideal for contaminated sites
    • No need for soil disposal
    • Reduces logistical costs
    • Results in a cleaner, safer job site
  • Reinforcement placed before concrete
  • No lost drill tip
  • Excels at penetrating hard soils
  • Increased safety, efficiency, and reduced environmental impact
  • Can be made with existing piling machines
  • …

What is the Difference Between an Olivier Pile and an Olivier DPA?

Olivier pile

  • The screw-shaped shaft
  • The screw shape projects an additional 200mm (±10”) in diameter beyond the pile shaft.

Olivier DPA

  • Smooth to slightly uneven shaft (cylindrical shaft)
  • Visibly spiral-like surface, comparable to a thin casting seam that forms between two formwork panels during concrete pouring. This spiral-like surface is very thin and has no functional impact.
  • Works mainly on end bearing/tip and friction resistance
Olivier Pile
Olivier DPA Pile

Curious about how Olivier DPA can optimize your foundation work? Contact us for more details and a tailored consultation.

Drilling Process

  1. Closing the flaps and positioning the machine and displacement auger;
  2. Clockwise screwing in of the tube and displacement auger;
  3. When the specific pile base depth is reached, the reinforcement cage is brought into the tube and concrete is pumped into the tube and funnel;
  4. The tube and the auger are counterclockwise screwed back with a constant pitch of min 22cm (8”) and max 25cm (10”) per rotation;
  5. Finally a cylindrical pile shaft with a visibly spiral-like surface is obtained.

Crafting an Olivier DPA is a skilled process that requires specialized knowledge and expertise, and Olivier provides the necessary guidance and support to ensure success at every step.

Patents
AU2021207405A1;AU2021207405B2;BE1027995A1;BE1027995B1;CA3158834A1;EP4090797A1;US12180669B2;US2023040291A1;WO2021144773A1;WO2021144773A9
and corresponding patents.