Rigid Inclusions

The rigid inclusion (RI) method is a displacement technique that improves weak, highly compressible soils to increase bearing capacity and reduce settlement through the installation of high modulus/controlled stiffness grout columns. Following advancement of the RI tooling to design depth, grout is delivered via a concrete pump and exits from the tip of the tool as it is withdrawn to create the column. Typically, a load transfer platform is installed between the RIs and the underside of the foundation system.


  • Low Vibration
  • Stiffer ground improvement system generally resulting in better performance (bearing capacity and reduced settlement)


  • Railway and roadway embankments
  • Storage tanks
  • Parking structures
  • Mat foundations
  • Isolated spread footings