DPA-PLUS screw piles

DPA-PLUS screw piles is an in-ground formed and soil-displacing screwed pile system. The soil is laterally displaced, so only the drilling tube contains a limited amount of excavated soil. The production is low-vibration, which is important when producing near adjacent structures that are sensitive to settlements and/or vibrations.

Application

  • Particularly suitable for residential construction, commercial construction, and other new buildings where disturbance to the surrounding area needs to be limited.
  • Suitable for urban renewal projects where vibration-free foundations near adjacent buildings or properties are required.
  • An alternative to non-soil-displacing screw piles where excavated soil severely contaminates the construction site or cannot be removed or disposed of.
  • Causes less noise disturbance than driven pile systems, making them applicable for the expansion of existing and occupied buildings.
  • Applicable in soil conditions or loadings where a long reinforcement cage is necessary, which can be centrally placed in the pile with the required coverage.

Features

  • Soil-displacing, with only limited excavated soil at the drilling tube and ground level.
  • Low-vibration, therefore well-suited near adjacent structures sensitive to settlements and/or vibrations.
  • Noise-friendly, resulting in less disturbance to the surroundings and suitable near residences, schools, public buildings, etc.
  • Pile head is poured up to the working level.
  • Pile length can be immediately adjusted to the ground conditions.
  • Adjustments in pile specifications possible until just before work commencement.
  • Batter positions: backward 5:1 / forward 10:1.
  • Loadable both in tension and compression.
  • Reinforcement possible along the entire length.
  • Reinforcement is installed in the feed tube before concreting.
  • The pile system is known and accepted by the Building and Housing Supervision service, structural engineers, as well as in construction standards. Competitive compared to soil-removing piles due to greater bearing capacity and a 'clean' construction site.

Vroom Funderingstechnieken has extensive experience with screw piles and provides advice on the application possibilities of this pile type and other screw pile systems.

Quality Control

Vroom Funderingstechnieken manufactures DPA-PLUS screw piles according to a procedure established for Vroom Funderingstechnieken as part of internal quality control, nationally applicable standards, and execution conditions.

Control of Geotechnical Bearing Capacity

DPA-PLUS screw piles are installed to the calculated screw-in depth during soundings. The required drilling moment is measured for assessment and recognition of the existing soil condition.

Control of Pile Technical Bearing Capacity

All DPA-PLUS screw piles are checked for continuity after pile manufacturing. Additional inspection can visually occur after excavation of the pile head. The concrete quality can additionally be checked by drilling and testing cores from the manufactured piles.

Let Us Advise You

Vroom Funderingstechnieken devotes the utmost care to the creation of our brochures and website. However, no rights can be derived from the content. If you use information from our brochures or our website without verification or further advice from Vroom Funderingstechnieken, you do so at your own risk.

Vroom Funderingstechnieken accepts no liability for the accuracy and/or suitability of the information for the intended application. For questions about the application of our products in concrete projects, we advise you to contact our sales department.

DPA-PLUS screw piles
DPA-PLUS screw piles
DPA-PLUS screw piles
DPA-PLUS screw piles

Features

  • Soil-displacing, with only limited excavated soil at the drilling tube and ground level.
  • Low-vibration, therefore well-suited near adjacent structures sensitive to settlements and/or vibrations.
  • Noise-friendly, resulting in less disturbance to the surroundings and suitable near residences, schools, public buildings, etc.
  • Pile head is poured up to the working level.
  • Pile length can be immediately adjusted to the ground conditions.
  • Adjustments in pile specifications possible until just before work commencement.
  • Batter positions: backward 5:1 / forward 10:1.
  • Loadable both in tension and compression.
  • Reinforcement possible along the entire length.
  • Reinforcement is installed in the feed tube before concreting.
  • The pile system is known and accepted by the Building and Housing Supervision service, structural engineers, as well as in construction standards. Competitive compared to soil-removing piles due to greater bearing capacity and a 'clean' construction site.

Vroom Funderingstechnieken has extensive experience with screw piles and provides advice on the application possibilities of this pile type and other screw pile systems.

Quality Control

Vroom Funderingstechnieken manufactures DPA-PLUS screw piles according to a procedure established for Vroom Funderingstechnieken as part of internal quality control, nationally applicable standards, and execution conditions.

Control of Geotechnical Bearing Capacity

DPA-PLUS screw piles are installed to the calculated screw-in depth during soundings. The required drilling moment is measured for assessment and recognition of the existing soil condition.

Control of Pile Technical Bearing Capacity

All DPA-PLUS screw piles are checked for continuity after pile manufacturing. Additional inspection can visually occur after excavation of the pile head. The concrete quality can additionally be checked by drilling and testing cores from the manufactured piles.

Let Us Advise You

Vroom Funderingstechnieken devotes the utmost care to the creation of our brochures and website. However, no rights can be derived from the content. If you use information from our brochures or our website without verification or further advice from Vroom Funderingstechnieken, you do so at your own risk.

Vroom Funderingstechnieken accepts no liability for the accuracy and/or suitability of the information for the intended application. For questions about the application of our products in concrete projects, we advise you to contact our sales department.

Technical data

Manufacturing

  1. The screw installation rotates clockwise through intermediate layers.
  2. The screw installation rotates clockwise to the correct depth.
  3. Installation of reinforcement over the requested length.
  4. Filling the core of the tube with concrete mix and rotating counterclockwise to retract.
  5. Concrete mix during manufacturing to at least 1 m above the working level. The tube is pulled out of the ground while rotating counterclockwise.
  6. Finishing the pile, if necessary, for measurement purposes.

Reinforcement

B500B quality. Pile reinforcement, dimensioned based on load data by the structural engineer. Spiral hoop reinforcement results in a significantly stiffer reinforcement cage, hence less deformation.

Shaft reinforcement is suspended at height in the screw tube before concreting.

Any additional head reinforcement is inserted immediately after pile manufacturing.

Bearing Capacity

Pile Tip Bearing Factor

αp = 0.63 over the outer diameter of the pile (trajectory III Koppejan NOT reduced)
β = 1.0

Shaft Friction Factor

αs = 0.009 over the outer diameter of the pile (no reductions)

Tension: αt = 0.009

Load and Deformation Behavior

Within the range of service loads, a settlement behavior that is approximately equal to that of a driven pile.

Loading Spectrum

Pressure up to approximately 2500 kN.
Tension up to approximately 400 kN.
Advice on the bearing capacity of a DPA-PLUS pile in a particular soil condition can be provided by Vroom Funderingstechnieken.

Available Pile Diameters, Sizes in mm

360/510, 460/610, and 560/710.
The pile length depends on the soil condition and pile loadings.
Screw-in depth and pile bearing capacity to be assessed for feasibility by Vroom Funderingstechnieken.

Concrete Quality

In C20/25, C25/30, C30/37, and C35/45 quality.

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