Jet Grouting | Piling Contractors | CFA Piling | Grouting | Keller UK

Jet Grouting

Jet grouting is a procedure for the insitu construction of solidified ground of pre-determined shape, size and depth, to a designed characteristic. This solidified ground is often known as Soilcrete®.

The main advantages of the system are:

  • A more predictable degree of soil improvement
  • A high level of permeability control.
  • Minimal vibration and noise.
  • Ability to operate in headroom as low as 3.0m.
  • Minimum site disturbance and limited working space required.
  • Only environmentally acceptable grouts are used in the process.
  • Installation beneath foundations from outside building.
  • Encapsulation of obstructions including services.

Jet grouting can be used in soils ranging from gravels to clays above and below groundwater level.


Soil is loosened by the jetting action of high pressure water often sheathed in a cone of air. The loosened soil is partially removed to the surface via air-lift pressure as the remaining soil is simultaneously mixed with durable cement-based grout. The final result is a homogeneous low permeability Soilcrete® mass with typical strengths of 5-15N/mm2, Quality Control is achieved by

  • Site monitoring of lift speeds, rotation, depth and the pressures and flow rates of grout, water and air. 
  • Trial columns where appropriate.
  • Grout mix quality control tests.
  • Insitu sampling where appropriate
  •  Measurement of the specific gravity of the grout waste slurry

Jet Grouting

Jet Grouting is a procedure for the insitu construction of solidified ground of pre-determined shape, size and depth. This solidified ground is often known as Soilcrete. The system is commonly used to underpin major structures such as quay walls, bridges and large building foundations in advance of excavation or to treat ground ahead of tunnelling.

Where we've done it

Our solutions are used across the construction industry from residential development, infrastructure and civil engineering to the energy and resource sectors.

Other things we do

We deliver cost effective foundation and ground engineering solutions safely - click on the arrows to find the techniques you are looking for.

Contact Us

Call us to discuss if you want help with a grouting solution...

Relevant Offices

Contacts for Assistance:
Anthony Lucas (07908 502122)