Screw injection anchors

Screw injection anchors are thick-walled tubular anchoring elements that can transfer tensile and compressive forces to the subsoil. On the far end, screw injection anchors have a auger type tip for installation at depth using a special drilling rig. Grout is injected under pressure through the lance just behind the tip, along the length of the anchoring body. The auger mixes the grout with the soil to create a mass that helps the anchor to embed in the surrounding soil. The anchor body has the same diameter as the auger selected, varying between 150 and 400 mm. Screw injection anchors for permanent structures can be partially fitted with corrosion protection.

Application

Screw injection anchors are used in all kinds of soil- or water-retaining structures, such as: - construction pit walls, fencing, quay walls, high-voltage pylons, swimming pools, cellars, underwater concrete floors.

Ambient factors

Can be installed without vibrations and low noise
Can be installed against water pressure
Can be installed vertically and at any inclination
Working in confined spaces possible.

Pros and Cons

The anchors can be installed from the ground or from a pontoon.
In terms of production, the product depends on obstacles in the subsoil.

Applicated

Name of Project	Client
Muiden, Construction pit Aquaduct motorway A1-A6	Construction consortium SAAone
Gouda, 2nd Juliana lock	Van Hattum en Blankevoort
Bergambacht, Embankment reinforcement Bergambacht-Ammerstol-Schoonhoven	Waterauthority Schieland - Krimpenerwaard
Berlicum, Building pit lock Berlicum Zuid-Willemsvaart,	Construction consortium Willemsunie
Rotterdam Maasvlakte, Quay wall EMO	Port of Rotterdam
Breukelen, Widening highway A2	Van Hattum en Blankevoort
Lekkerkerk, Riverbank reinforcement Nederlek	Waterauthority Schieland - Krimpenerwaard