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Compaction Grouting

Compaction grouting

GROUND IMPROVEMENT SOLUTIONS

Compaction Grouting

GeoStabilization International provides engineered compaction grouting solutions that densify soils, reduce settlement risk, and stabilize weak or variable ground conditions. This proven ground improvement method increases bearing capacity with minimal surface disruption, making it well suited for projects where safety, access, and long-term performance matter.

From stabilizing foundations in southern Ontario to improving ground conditions near coastal British Columbia and river-adjacent sites across Alberta, GSI delivers precision grouting programs supported by geotechnical engineering expertise and field-proven installation methods.

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What Is Compaction Grouting?

Compaction grouting, also called low-mobility grouting, is a ground improvement technique that injects a stiff, cementitious grout into the subsurface under controlled pressure. Unlike permeation grouting, compaction grout does not flow through soil pores. Instead, it forms discrete grout masses that displace and compact the surrounding soils, creating improved density and stiffness.

This process strengthens weak zones, reduces compressibility, and restores more uniform ground support. Because installation typically generates low vibration and limited noise, compaction grouting is a practical option near occupied buildings, critical infrastructure, and sensitive sites.

Compaction grouting is commonly used for foundation stabilization, void remediation, sinkhole repair, and preconstruction ground improvement where excavation may be disruptive or impractical.

Applications Across Canada

GSI designs compaction grouting programs for a wide range of Canadian infrastructure and development needs, including:

Fills subsurface voids and improves soil density to reduce collapse risk.

Restores support beneath structures affected by settlement or soft ground.

Densifies loose, saturated soils to improve seismic performance in higher-risk zones.

Strengthens soils prior to development to support stable foundations.

Improves soils beneath roads, bridges, retaining structures, and approach slabs with limited disruption.

The Compaction Grouting Process

Every project begins with a geotechnical review to evaluate subsurface conditions and define target treatment zones. Using specialized injection equipment, low-mobility grout is installed at controlled pressures and staged in planned lifts. As grout is placed, it compacts surrounding soils and builds a network of improved ground that increases bearing capacity and reduces settlement potential. Treatment may be localized beneath distressed areas or installed in a grid pattern where broader improvement is required.

Because compaction grouting can be completed with limited excavation and minimal surface disturbance, it is well suited for confined sites, low-clearance work areas, and locations where maintaining access is a priority.

Proven stabilization.

Strengthen weak soils before settlement worsens.

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Benefits of Compaction Grouting

Compaction grouting delivers measurable improvements in ground performance and long-term stability:

  • Increases bearing capacity by densifying weak or loose soils

  • Reduces settlement risk and restores more uniform foundation support

  • Improves seismic resilience by decreasing liquefaction susceptibility in applicable soils

  • Low-disruption installation with limited vibration and reduced noise

  • Adaptable design for a range of soils and project constraints

These advantages make compaction grouting a reliable option for stabilizing soils beneath both existing infrastructure and new construction.

Why Choose GSI

GeoStabilization International combines geotechnical engineering expertise, specialized injection systems, and constructability-focused planning to deliver dependable compaction grouting outcomes. Projects are delivered through GSI’s design-build-warranty approach, providing accountability from evaluation through installation and performance verification.

GSI crews are experienced in complex ground conditions, limited-access environments, and time-sensitive stabilization work. Whether the goal is to reduce settlement beneath a structure or stabilize soils supporting transportation infrastructure, GSI delivers durable solutions aligned with long-term safety and performance.

Our Solutions

Soil Nail Launcher

Soils

How-to-fill-a-sinkhole

Ground Improvement

Rockfall Netting as Rockfall Containment Solution-min

Rockfall Mitigation

Bridges

Our Emergency Response Solutions

From landslides and rockfalls to flooding and wildfires, unexpected geohazards demand immediate action. Our emergency response team is ready 24/7 to deploy specialized equipment and proven techniques, delivering fast, engineered solutions that restore access and stabilize critical assets when it matters most.

Broken road from flooding

Natural Disasters
Roadway collapse due to embankment failure, with workers assessing damage and erosion near a steep slope.

Transportation
Collapsed retaining wall with exposed soil and drainage pipe failure

Commercial/Utility

Client Reviews

Positive Experience Working with Project Team

Justin, I wanted to reach out and let you know that is was a pleasure working with you all at the [….] Project. The guys on this job were very professional and never once wavered from the plans and specs. These guys did absolutely everything the right way and wanted to make sure that the customer was happy with the work. Again, I appreciate your guys’ hard work and professionalism and look forward to working with you again in the future.

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!

Professional Project Support in British Columbia, Canada

I am writing this email to let you know that we are honored to work with GSI and your subcontractors as you have all demonstrated professionalism since your very first involvement of the project. Everyone on the project team is highly experienced, efficient and motivated. We also appreciate your professional work and your prompt response to our inquires. We understand that it is a project and a project site with many unique challenges. Many thanks again!

Don’t let weak soils hold your project back

Get in Touch

If your site is affected by settlement, weak soils, subsurface voids, or ground instability, GSI can help. Contact our team to review conditions and develop an engineered compaction grouting program that strengthens ground support and reduces long-term risk.

Complete our contact form to request a consultation and learn how compaction grouting can support your project.

855.559.5217

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    Our Awards, Certifications, & Memberships

    ADSC Safety Award
    GeoHazard Professionals Safety Recognition
    Gold Shovel Standard Certified
    GSI is a Directing Member of the Association of Geohazard Professionals