Grout anchors, with rods or strands, are tension elements which are made of high-grade steel. The anchor's tensile force comes from the shear stress between the grouted anchor body and the surrounding soil. A steel casing is hammered or drilled into the soil to the desired depth, after which the anchor rod or strand is inserted into the casing. Afterwards, the space between the pipe sleeve and the rod or strand is filled with grout. The drill pipe is gradually retracted, with the space being filled by pumping in grout under pressure into the drillpipe. The anchors can be temporary (less than 2 years) or permanent, this is important in relation to the used corrosion protection. They can also be removed in whole or in part. The anchorbody usually stays behind. The rod anchors can have various diameters: 26.5 ; 32 ; 36 ; 40 and 47 mm in steel grade Fep 950/1050. Strand anchors can have 2 to 12 strands in steel grade Fep 1860.
Grout anchors are used in all kinds of soil- or water-retaining structures, such as: building pit walls, fencing, quay walls, high-voltage pylons, swimming pools, cellars, underwater concrete floors.
Name of project |
Client |
Kampen, Pleasure craft lock Ijsseldijk |
Van Hattum en Blankevoort |
Nunspeet, Building pit Nestle GOOPL |
Visser & Smit Bouw Regio Noord |
Heerlen, Construction pit Maankwartier Noord en Zuid |
Jongen Bouwbedrijf |
Bergambacht, Embankment reinforcement Bergambacht-Ammerstol-Schoonhoven |
Waterauthority Schieland - Krimpenerwaard |
Vianen, Riverbank reinforcement, pilot Soil nailing |
Waterauthority Rivierenland |
Tiel, Construction pit Community Centre Westluidense Poort |
Van Hattum en Blankevoort |
Muiden, Construction pit Aquaduct motorway A1-A6 |
Construction consortium SAAone |
Amsterdam, Viaduct Schinkel OV-SAAL |
Van Hattum en Blankevoort |
Delft, Extension motorway A4 |
Construction consortium A4All |
Berlicum, Building pit lock Berlicum Zuid-Willemsvaart |
Construction consortium Willemsunie |
Gouda, 2nd Juliana lock |
Van Hattum en Blankevoort |
Venlo, Construction pit Stadskantoor |
Ballast Nedam Funderingstechnieken |
Arnhem, Quaywall Rijnkade |
Heuvelman Ibis |
Emmen, Construction pit Parking garage Westerstraat |
Strukton Civiel Projecten |
Utrecht, Widening highway A2 |
Trajectum Novum |
Veenendaal, Parking garage De Tricotage |
Welling Didam |