Jet grouting

Jet grouting is a ground improvement technique based on the high-pressure injection of a cementitious grout into the soil, causing in-situ erosion and mixing.

The result is the formation of treated columns with improved mechanical strength and watertightness, suitable for use even in complex geotechnical conditions.

Characteristics and Applications

By controlling the injection parameters, it is possible to define the diameter of the columns (600–2500 mm), as well as the strength and permeability of the treated ground.

Jet grouting is used for:

  • bottom plugs in the presence of groundwater
  • waterproofing of retaining walls
  • stabilisation of loose soils
  • construction of retaining elements

Types of treatment:

  • Single-fluid: water-cement grout used for erosion and mixing
  • Double-fluid: cementitious grout combined with compressed air
  • Triple-fluid: high-pressure water for erosion and cementitious grout for column formation
Jet-grouting projects