Cement Pressure Grouting
Cement pressure grouting involves the injection of a fluid cement grout to fill voids in soil, rock, concrete structures, utilities, etc.  Typically the grout is injected into grout pipes that are drilled or driven into the natural or man-made structure.  The details of injection pressures, quantities, monitoring are very specific to each application and are typically detailed by the engineer or Earth Tech.

Application:

  • To fill voids in or beneath foundations, slabs, concrete structures, Etc. that typically develop due to erosion, settlement or other failure mechanism.
  • To fill abandon utilities.
  • To fill voids in a rock formation at depth, to cut off water or allow for excavation.

Advantages

  • Very versatile product, can be designed to address most structural, soil and rock conditions
  • Can be installed in restricted access

What to expect

  • Cement pressure grouting program is typically detailed by Earth Tech.
  • Cement grout is typically mixed on site.
  • Monitoring of existing structures for unwanted heave and grout intrusion.
  • Drilling to access the void.

Process

Aggregate Piers are installed by predrilling a hole in the ground and backfilled with aggregates. The aggregates are compacted using a specialty vibrator in lifts. In the case the soils cave or collapse, a bottom feed vibrator is lowered in the hole to the design depth. Aggregates (typically #57 stone) is then introduced in the hole through a bottom-feed system and compacted in lifts. The aggregates and the confining soils form an integrated foundation support system having low compressibility and improved load bearing capacity. The aggregate piers layout can be arranged to suit varying combinations of load, solid type and required settlement performance.

Quality Control

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