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Compaction Grouting Contractor

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Precision Grouting for Stable Foundations

GeoStabilization International is the compaction grouting contractor of choice for projects that require densifying loose soils, filling voids, and re-establishing ground support beneath critical infrastructure. For more than 20 years, our teams have delivered precision injection programs across North America, stabilizing foundations, pavements, and utilities with low-vibration methods that minimize disruption to active operations.

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Compaction Grouting on Farm with Sunken Ground
Compaction Grouting

Why Choose GSI as Your Compaction Grouting Contractor

  • Turnkey Design-Build: In-house geotechnical engineers and field crews manage design through installation, ensuring one accountable partner from start to finish.
  • Rapid Mobilization: Nationwide crews, portable plants, and compact rigs enable fast response in constrained interiors or tight urban sites.
  • Precision Injection and Monitoring: Staged ports, controlled pressures, and real-time adjustments ensure consistent, measurable improvement.
  • Low Disruption: Drilled ports and low-mobility grout minimize heave, vibration, and surface impact near structures or utilities.
  • Safety and Quality Management: Procedure-driven mixing, injection, and verification deliver reliable, documented performance on every project.

What Is Compaction Grouting?

Compaction grouting injects a stiff, low-mobility cementitious grout at controlled pressures to displace and compact surrounding soils. The process forms bulbous grout columns that increase soil density, improve bearing capacity, and reduce settlement potential.

Because the mix remains localized around each port, it provides highly targeted ground improvement beneath existing structures with minimal disturbance.

Common Applications

  • Sinkhole Repair and Karst Mitigation: Seal voids, fill cavities, and densify overburden to restore support. 
  • Foundation Repair and Re-Leveling: Reinforce or lift structures, slabs, tanks, and equipment pads. 
  • Liquefaction Mitigation: Densify loose, saturated soils to reduce seismic settlement and strength loss. 
  • General Ground Improvement: Pre-improve soils for new construction and stabilize embankments or corridors.
  • Utility and Corridor Stabilization: Address trench settlement and voids along pipelines and culverts.
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How GSI Executes Compaction Grouting Programs

Analyze subsurface data to locate voids and define performance criteria.

Design grout mixes and additives tailored to geology and project goals.

Install injection points and stage work to control heave and pressure.

Monitor pressures and volumes in real time for consistent densification.

Conduct proof testing, post-monitoring, and deliver complete as-built documentation.

Grouting in WV for Mine Collapse

Benefits of Compaction Grouting

  • Increased Bearing Capacity: Densifies soils to support heavier loads and reduce settlement. 
  • Low-Vibration Installation: Safe for sensitive structures and active facilities. 
  • Soil Versatility: Effective in sands, silts, fills, and karst overburden. 
  • Minimal Surface Impact: Compact equipment, small spoils, and quick mobilization.
  • Targeted Precision: Grout remains localized for controlled improvement and stability.

Integrated Ground Improvement Solutions

For complex conditions, GSI combines compaction grouting with complementary services:

  • Permeation and Slurry Grouting: For seepage control and fissure sealing. 
  • Micropiles and Underpinning: To transfer structural loads to deeper strata. 
  • Drainage Improvements: To manage groundwater and prevent reoccurrence.
  • Soil Nailing and Shoring: To stabilize adjacent cuts or walls during excavation.

The GSI Advantage

 

Speed and Certainty

Rapid deployment and experienced crews compress schedules and reduce change orders.

Predictable Delivery

Streamlined coordination and proven design-build processes minimize risk.

Nationwide Coverage

Local responsiveness backed by a large fleet and specialty access equipment.

Client Reviews

Foundation Grouting and Structural Repair for Homeowner

I wanted to drop you a quick note. Late last year I had Tom Szynakiewicz come by and advise me as to what I needed to do to fix my house structure. Tom and GSI were great to work with to find a solution for my structure issues. GSI did an excellent job for us and got us on the right track with the work that was performed. We just sold the home last week, and disclosed the work that was done. We had zero issues with selling the home because it was fixed by GSI. I am very thankful I called and got you guys involved! Thanks again for steering me in the right direction Wayne!

Skilled and Professional Crew Support in New Mexico

I want to thank you and your crew for the exceptional job we just completed. It was a pleasure working alongside Brice and his crew. All of them are very stand-up men and have amazing respect, are knowledgeable with the process and technique, and all deserve an “Atta-Boy”. (Ha-ha). If you could pass this along to your superiors I would appreciate it. Once again, it was a pleasure working with GSI and this crew.

Safety-Focused Transportation Project Support in South Carolina

As told by GSI Project Development Engineer: We had a site walk today with the gang from the SCDOT district as well as the statewide construction engineering group. They had good things to say about the professionalism and intelligence of our crew. In particular, one of the construction engineers pointed out that in all his years of working on projects, ours was the best and most thorough safety meeting he had attended.

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Need a compaction grouting contractor for ground improvement or sinkhole repair? GSI’s design-build teams deliver precise, low-vibration grouting solutions that stabilize ground conditions quickly and safely.

Request a site assessment or proposal today.

855.579.0536

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