Hollow-Bar Micropiles Stabilize Settling Foundation
Specialty equipment was required to drill through the buried rocks underneath this foundation.
The Challenge
The structure was experiencing foundation settlement due to unstable subsurface conditions. Buried rock and difficult soil layers beneath the foundation made conventional foundation repair methods impractical. Without stabilization, continued settlement threatened the structural integrity of the building and posed long-term safety and performance concerns.
Project Considerations
Access limitations and subsurface obstructions required a foundation solution capable of penetrating buried rock while being installed with minimal vibration and disturbance to the existing structure. Traditional deep foundation systems were not feasible due to the site constraints and the need for precision installation in challenging ground conditions.
Our Solution
Engineered Foundation Technologies utilized hollow-bar micropiles to stabilize the settling foundation. Specialty drilling equipment was mobilized to advance the micropiles through buried rocks and into competent bearing strata below. The hollow-bar system allowed for simultaneous drilling and grouting, creating a reinforced load-bearing element capable of transferring structural loads to stable soils and bedrock.
Results & Benefits
The hollow-bar micropile system successfully stabilized the foundation and permanently arrested further settlement. The installation was completed efficiently despite difficult subsurface conditions, with minimal impact to the existing structure. This solution provided a durable, long-term foundation repair while avoiding the disruption and cost associated with more invasive repair methods.