Underpinning Contractor

Foundation Underpinning for At-Risk Structures

GeoStabilization International is the underpinning contractor of choice when existing foundations require added capacity, deeper bearing, or stabilization.

For more than 20 years, our design-build teams have delivered foundation underpinning across North America, helping general contractors, DOTs, owners, and developers protect assets, maintain operations, and control schedules and budgets.

With micropiles, targeted grouting, and specialized access methods, we strengthen foundations with low vibration and minimal disruption, even in confined interiors, steep terrain, and remote environments.

Contact Us

How GSI Delivers Foundation Underpinning

• Assessment and Monitoring – Review subsurface data, map cracks and settlement, define loads, and establish performance targets.

• Design-Build Engineering – Select pile type, dimensions, and reinforcement; design grouting, casing, and corrosion protection systems.

• Limited-Access Drilling – Advance piles in staged sequences to maintain stability and minimize disruption.

• Load Transfer and Integration – Install beams or pile caps to connect to existing foundations; perform proof and load testing as required.
  
• Closeout and Guidance – Deliver testing results, as-built documentation, and maintenance recommendations for durable performance.