Jet-Grouting System

The combination of a down-the-hole hammer with an integrated jet-monitor enables drilling and jet grouting in difficult formations.

Innovation and efficiency

The innovative Wassara Jet Grouting Hammer provides a solution for single pass jet-grouting with single fluid in most formations. Where boulder and other obstacles have made jet grouting complicated, the Wassara Jet-Grouting Hammer makes it easier.

Jet-grouting difficulties

Difficult formations

Could require casing of the hole

The Wassara method

Single pass jet grouting with Wassara

Enables single pass Jet Grouting in all formations

  1. Channel for the high pressure cement grout
    During jetting, the cement grout is delivered through this channel with pressures up to 500 bar.
  2. Channel for the high pressure water
    The water is powering the hammer while drilling. Normal water pressure is 100-150 bar. During jetting, a small amount of water is running to keep the cement grout from entering the hammer.
  3. Wassara nozzle Wassara
    Jet grouting hammer has four nozzle Sockets for multiple configuration and backup. Nozzle hole sizes range from Ø 3.0 to 6.0 mm.
  4. Wassara drill bit
    This drill bit is particularly designed for use with Wassara water powered hammers.

W100JG Hammer

Interested in more details regarding our 4" Jet grouting hammer?

W120.G3 Hammer with Jet-grouting Monitor

Interested in more details regarding our 5″ Hammer with integrated Monitor?

Case studies

See our featured Case studies below to learn what real world Ground Engineering and Jet-grouting-projects our technology has been a part of.

  • 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 …