Rigid inclusions transport loads into frail strata to a solid stratum underneath using high modulus, controlled stiffness columns. HJ Foundation’s teams are ready to design-build a cost-efficient rigid inclusions solution for you.

Common Uses

  • Increase bearing capacity
  • Decrease settlement

Technical Details

A bottom-feed mandrel with a top-mounted vibrator is advanced through the fragile strata to the firm below. Granular bearing soils undergo some densification due to displacement. Concrete or grout is then pumped through the mandrel, which may be raised and lowered several times within the bearing depth to create an expanded base (if the design asks for this).

The mandrel is extracted while a positive concrete head is sustained. The concrete fills the void created by the mandrel during extraction. The top of the inclusion is usually destroyed in a resilient stratum or overlain by an engineered relieving platform. The refined execution is the result of the reinforced, compressible strata with high modulus columns.