Anchor drilling

Securing immersed tunnels with Wassara

Hole straightness

Anchoring of immersed tunnels involves drilling long holes with strict accuracy requirements. The water-powered DTH hammer from LKAB Wassara has a proven track record of its ability to drill long straight holes.

High drilling performance

A LKAB Wassara water-powered DTH hammer will maintain a high rate of penetration in most kind of formations. The Wassara-hammer’s performance is unaffected by water in the formation, even at high back pressure.

High quality borehole surface

Water-powered DTH drilling gives an optimal borehole surface for the anchoring process. The borehole surface needs to be clean and have enough roughness to ensure successful grouting of the anchor.

Examples of successful projects

  • Jet-grouting columns in difficult geology in Hässleholm, Sweden

    A storage building has been constructed in Hässleholm, Sweden. The ground needed stabilization as the geology presented sand and friction …

  • Energy storage in Lund, Sweden

    A project with strict restrictions regarding the water returned to the sewage system.

  • New ground engineering hammer, tested in Södertälje Canal, Sweden

    Wassara´s new hammer developed specifically for Ground Engineering was tested in a casing advancement application during dredging works for widening …