Permeation Grouting

Permeation grouting involves injecting chemical or microfine cement stabilisers into the ground at low pressure in order to strengthen or stabilise existing soils. These stabilisers have an extremely small particle size, which enables them to travel between the soil’s larger particles without displacing them. The stabilisers fill pore spaces and bond with particles to form a cohesive mass that is resistant to water. Typical applications include:

  • Stabilising the foundation soil of existing structures adjacent to new construction.
  • Stabilising the sides of basements, swimming pools, and retaining wall excavations.
  • Slope and embankment stabilisation.
  • Improving the load bearing capacity of foundation soils pre-construction.
  • Stabilisation of easement in-fill
  • Earth dam stabilisation.

Benefits of Permeation Grouting

SlabJacker’s permeation grouting systems offer a number of benefits to both the builder and end user:

  • Mitigates the risk of slabs and footings adjacent to new construction being undermined by excavation or vibration from construction processes, thereby allowing construction to be sited closer to boundary lines.
  • Excavation is safer because the risk of collapse is reduced.
  • Prevents land slip and loss of land due to coastal or run-off erosion.
  • The system can be used partly in lieu of both shoring and spoil removal to reduce the cost of excavation on hard to access and hard to manage sites.
  • Minimises the requirement for infill around below ground structures and consequently the likelihood of settlement and water erosion in these areas.
  • Prevents sinking and cross movement of footings next to easements.

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