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Grouting

Reliable Ground Improvement and Void Mitigation

GeoStabilization International is the grouting contractor of choice for projects requiring soil densification, void filling, seepage control, or settlement stabilization. For more than 20 years, our teams have delivered compaction, slurry, permeation, and chemical grouting programs across North America, restoring capacity, protecting infrastructure, and keeping projects on schedule and within budget.

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Why Choose GSI as Your Grouting Contractor

In-house geotechnical engineers and field crews manage every phase from assessment through installation, providing one accountable partner.

Nationwide crews and compact equipment enable fast response in constrained or interior environments.

Drilled ports, staged injection, and real-time monitoring minimize risk near sensitive or operational structures.

Compaction, slurry, permeation, and chemical systems are customized to match site geology and project performance targets.

Every program follows documented procedures for mixing, injection, and verification that meet or exceed industry standards.

Our Grouting Capabilities

As a trusted grouting contractor, GSI provides specialized ground improvement and foundation stabilization services:

  • Compaction Grouting: High-pressure injection to densify loose soils, mitigate settlement, and restore bearing capacity.

  • Slurry Grouting: Cement slurries for coarse soils or fractured rock to enhance strength and reduce seepage.

  • Permeation Grouting: Microfine cement grouts that solidify sands and fissures for improved bearing and water control.

  • Chemical Grouting: Structural and water-control resins that seal leaks, stabilize soils, and reinforce foundations.

  • Void Filling and Curtain Grouting: Engineered fills beneath pavements, slabs, and seawalls, and seepage curtains for groundwater cutoffs.

  • Integrated Solutions: Combine grouting with micropiles, soil nailing, or drainage for complete ground improvement.
  • Emergency Response: Rapid stabilization following sinkholes, washouts, or storm-related damage.
Grouting
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Compaction Grouting on Farm with Sunken Ground

Where Grouting Excels

  • Settlement Control and Lift: Densify loose fills and restore support beneath slabs or pavements. 
  • Utility and Corridor Stability: Address trench settlement and backfill loss along underground utilities. 
  • Excavation Support and Shoring: Strengthen soils and reduce inflow adjacent to active work zones. 
  • Water and Seepage Management: Seal piping paths and control groundwater near tunnels, culverts, and structures. 
  • Foundations and Slabs: Increase bearing capacity beneath existing buildings using low-vibration methods.
  • Karst and Sinkhole Mitigation: Seal voids and stabilize soils; integrate micropiles where deeper load transfer is needed.

How GSI Delivers Grouting Programs

 

Assessment and Targeting

Analyze subsurface conditions to identify voids, inflow paths, and improvement zones.

Mix and Method Selection

Select the optimal grout type and formulation based on project objectives and ground conditions.

Port Layout and Sequencing

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

Controlled Injection

Monitor pressures and volumes in real time, adjusting to field response for precision results.

Verification and Closeout

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

The GSI Advantage

  • Speed and Certainty: Rapid deployment and proven methods shorten project timelines. 
  • Low Disruption: Compact rigs and low-vibration systems minimize impact to operations and the public. 
  • Comprehensive Solutions: Grouting integrated with foundations, soil nails, and earth retention for total stability.
  • Nationwide Reach: Local responsiveness supported by experienced teams and specialized equipment.
Permeation Grouting

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!

Reliable Project Support in South Dakota

Cameron, I’m glad you followed up because I don’t do a good job of telling people they did a good job sometimes and I know you’re like me if you hear nothing bad then it must have been OK. From my standpoint, you guys really helped us out by being able to get a crew here quickly which is just what we needed. As for the crew they were fantastic, pretty hands off on my end, didn’t require much of my time and did everything they said they were going to do when they said they were going to do it. Which believe me is very refreshing. So, thank you guys for all your help and I do look forward to an opportunity to work with you again.

On-Schedule and Professional Project Support in Virginia

As told by GSI Project Development Engineer: I was happy to take a call from [the Residency engineer] today and listened to him tell me how happy he was with the performance of Dylan and entire crew at the Garden Creek site. He had great things to say about the competence, work ethic, and professionalism of the whole team out there, and wanted to thank Dylan for the excellent communication as the project has unfolded. This is no small compliment, as this project began in a potentially negative atmosphere since the public thought we were behind schedule before we ever arrived! Nicely done, guys.

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Need a grouting contractor for ground improvement or void mitigation? GSI’s design-build teams deliver low-vibration, engineered grouting solutions that restore stability and protect assets.

Request a site assessment or proposal today.

855.579.0536

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    Our Awards, Certifications, & Memberships

    ENR Regional Best Project 2023
    ADSC Safety Award
    GeoHazard Professionals Safety Recognition
    Gold Shovel Standard Certified
    GSI is a Directing Member of the Association of Geohazard Professionals
    GSI is a TOP 10 Military Friendly Employer