• Deep Foundations
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  • Beam & Lagging Walls
  • Jet Grouting
  • Cutter Soil Mixing
  • Barrettes
  • Augercast (CFA) Piles
• Ground Treatment
  • Cement Grouting
  • Asphalt Grouting
  • Jet Grouting
  • Compaction Grouting
  • Chemical Grouting
  • Cutter Soil Mixing
  • Low Mobility Grouting
• Ground Improvement
  • Stone Columns
  • Vibro-Compaction
  • Vibro Concrete Columns

Home : Services : Ground Treatment : Compaction Grouting

COMPACTION GROUTING

Nicholson is a leader in a wide range of grouting techniques. We utilize our unparalleled experience and state-of-the-art capabilities to produce the highest quality and most cost-effective compaction grouting solutions for a wide variety of applications.

From increasing the bearing capacity of soils under slabs and spread footings, to reducing liquefaction potential, arresting foundation settlement, lifting and leveling structures, providing pre-construction site improvement, and controlling settlement over tunnels or sinkholes, Nicholson is a leader in the use of compaction grouting techniques.

Compaction grouting is a method of ground treatment that involves injecting a very stiff homogeneous grout mix (usually 0” to 1” slump), under relatively high-pressures, and at low injection rates (<2 cubic feet/minute) to subsurface locations in pre-designed patterns in order to displace and compact soils. The injected grout pushes the soils to the side as it forms a grout column or bulb.
Grout is usually injected to a cut-off criteria of 1) pressure at a given and known injection rate, 2) predetermined volume, or 3) unwanted movement of a structure or formation being grouted (heave). 

The soil becomes increasingly dense as water and/or air are forced out and soil particles are rearranged by the incoming grout. Grout injections can be continued until grout forces overcome overburden or containment pressures and lift occurs. If lift is a desired result, the process can be continued on a controlled basis until lift requirements have been achieved.
Compaction grouting requires close coordination between the following: soil properties, grout injection rates, grout mix designs, in-situ soil conditions, and equipment capabilities.  Nicholson has the experience and value-added engineering capabilities to develop the most viable and cost-effective compaction grouting solutions. To learn more about Nicholson compaction grouting or any other specialty techniques, please call 412-221-4500 or contact us today. 




Pharmaceutical Warehouse, Tennessee
Compaction grouting and micropiles were used to remediate settling columns and floor slab of a 13-acre warehouse distribution facility.

THE FACTS

Compaction Grouting Applications

• Improve soft, compactable soils (typical N values 0 to 30).
• Stabilize or re-level existing structures.
• Stabilize existing underground structures such as pipes, tunnels and subways.
• Repair or enhance defective piles by inserting bells at tips, filling/repairing voided sections, increasing side friction, and reducing/reversing down drag.
• Install compaction grouted piles as structural elements.
• Reduce water seepage through the densification of water bearing soils.