Survey, Grout and Drainage holes

Drilling long straight holes with Wassara-hammers

Long straight holes

Regardless of tunneling method, traditional drill and blast or Tunneling Boring Machine (TBM), there is a need to drill long straight holes in order to minimize stops in production for surveying and grouting purposes.

The water-powered DTH hammer from LKAB Wassara has a proven track record of its ability to drill long straight holes while maintaining performance throughout the entire hole length.

Drills through difficult formations

The water-powered DTH hammer can penetrate hard, soft and fractured rock as well as water-rich formations with high back pressure.

High drilling performance

A Wassara water-powered DTH hammer will maintain a high rate of penetration in most formations. The Wassara hammer performance is unaffected by water in the formation.

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 …