Tubular screw piles

Tubular screw piles have been developed for projects where a specific soil condition is present and full-length reinforcement is required. The pile system is non-displacing, and production is vibration-free and low-noise.

Application

  • Used in commercial projects where vibration-free and/or low-noise work is required.
  • Can be equipped with long reinforcement bars before concreting, ensuring guaranteed coverage after pile manufacturing.
  • Can be employed in retaining walls with a large retaining height.
  • Partially limit ground relaxation. Due to the large core diameter, there can be less ground relaxation compared to concrete screw piles. Less soil may also emerge. However, this should not be considered in structural calculations.

Features

  • Rapid delivery times possible.
  • Adjustments to pile specifications slightly possible up to the start of the work.
  • The piles can be loaded both in compression and tension.
  • Piles can be directly finished to height under certain conditions.
  • The pile system is non-displacing.
  • Tubular screw piles can be reinforced over their entire length with a cage.
  • The pile system is known and accepted by the Building and Housing Supervision Service, structural engineers, and within building standards.
  • Installed vibration-free and with minimal noise.

This less ground-displacing foundation technique is applied in residential and utility construction where specific ground conditions exist. Tubular screw piles are produced up to approximately 35 meters in length, and specific requests are accommodated.

Quality Control

Vroom Funderingstechnieken manufactures tubular screw piles according to their own execution procedure established as part of internal quality monitoring and national standards.

The manufactured tubular screw piles can optionally be acoustically tested and then evaluated by an independent advisory bureau.

Through our own quality control, we can respond adequately to doubts about pile quality or to client specifications regarding execution. Concrete for tubular screw piles is sourced from certified concrete plants.

Seek Advice

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 website without verification or further advice from Vroom Funderingstechnieken, you do so at your own risk and responsibility.

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

Tubular screw piles
Tubular screw piles
Tubular screw piles
Tubular screw piles
Tubular screw piles
Tubular screw piles

Features

  • Rapid delivery times possible.
  • Adjustments to pile specifications slightly possible up to the start of the work.
  • The piles can be loaded both in compression and tension.
  • Piles can be directly finished to height under certain conditions.
  • The pile system is non-displacing.
  • Tubular screw piles can be reinforced over their entire length with a cage.
  • The pile system is known and accepted by the Building and Housing Supervision Service, structural engineers, and within building standards.
  • Installed vibration-free and with minimal noise.

This less ground-displacing foundation technique is applied in residential and utility construction where specific ground conditions exist. Tubular screw piles are produced up to approximately 35 meters in length, and specific requests are accommodated.

Quality Control

Vroom Funderingstechnieken manufactures tubular screw piles according to their own execution procedure established as part of internal quality monitoring and national standards.

The manufactured tubular screw piles can optionally be acoustically tested and then evaluated by an independent advisory bureau.

Through our own quality control, we can respond adequately to doubts about pile quality or to client specifications regarding execution. Concrete for tubular screw piles is sourced from certified concrete plants.

Seek Advice

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 website without verification or further advice from Vroom Funderingstechnieken, you do so at your own risk and responsibility.

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

Technical data

Screw Installation

The screw installations are equipped with hydraulic drilling motors. Vroom has drilling motors for pipe screw piles with a capacity of up to 50 ton-meters.

Concrete Quality

In C20/25, C25/30, and C30/37 grades.

Reinforcement

B500B quality.

Dimensioning of long reinforcement is based on load data provided by the structural engineer.

Spiral hoop reinforcement creates a reinforcement cage that is significantly stiffer.

Bearing Capacity

The geotechnical bearing capacity according to Eurocode 7 (NEN 6743) provides the following pile class factors:

Pile Point Bearing Capacity Factor

αp = 0.56 (Phase III – reduced)

β = 1.0
for standard pipe/footplate dimensions

Shaft Friction Factor

αs = 0.006
Tensile αt = 0.0045

Load and Deformation Behavior

In accordance with Eurocode 7 (NEN 6743, type 2)

Load Spectrum

Up to a maximum of 5000 kN pressure (design value).

Structural Aspects

Available pipe screw pile diameters, including feeder pipe diameter, sizes in mm:

  • 400 (273)
  • 450 (323)
  • 500 (323)
  • 550 (323)
  • 600 (323)
  • 650 (406)
  • 700 (406)
  • 800 (406)
  • 900 (508)

Shaft dimensions are fixed sizes. Other pile diameters upon request.

Manufacturing

  1. Positioning of pipe screw with hydraulic drilling motor.
  2. Screw installation turns clockwise to the correct depth.
  3. Installation of reinforcement over the requested length.
  4. Filling the core of the pipe with concrete mix.
  5. Concrete mix is maintained during production to at least 1 m above ground level. Pipe is pulled out of the ground while stationary or rotating slightly clockwise.
  6. Finishing the pile, if necessary.
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