Project Overview
Raise Rite Concrete Lifting was contacted by a homeowner facing severe structural challenges in their residence. The primary concern was a significant depression—approximately 6 inches—in the center of the basement floor. This settlement compromised several critical systems, including plumbing and furnace alignment, and resulted in visible cracks and gaps forming along the first-floor walls.
Upon further investigation, it was discovered that the home had been constructed atop a former landfill, raising substantial concerns regarding long-term ground stability. However, since the home’s foundation footings remained unaffected, it was determined that the settlement was isolated to a large section of the basement floor. To validate these findings, Raise Rite conducted a Dynamic Cone Penetrometer (DCP) test, which confirmed the presence of extremely loose subgrade soils—necessitating deep soil remediation.
Solution: Deep Foamjection Soil Stabilization
To address both the unstable soil conditions and the need for structural lifting, Raise Rite proposed the use of its Deep Foamjection process. This method involves the injection of high-density polyurethane foam deep into the subsoil to densify and stabilize the ground.
Implementation Details
- A total of 47 injection points were strategically placed throughout the affected area of the basement.
- The injection grid was spaced at 4-foot intervals to ensure uniform coverage and consistent stabilization.
- Each injection point was driven to a depth of 4 feet.
- Foam was introduced at 1-foot intervals, promoting layered reinforcement throughout the soil column.
- The expanding polyurethane foam filled voids and consolidated loose soil zones, creating a dense, supportive subbase.
Lifting and Final Stabilization
Following soil stabilization, the sunken basement floor was methodically lifted using the same high-density foam system. This process was executed with precision to gradually restore the floor to its original elevation while minimizing stress on surrounding structural components. As a result, further damage to mechanical systems was avoided, and the home’s infrastructure was preserved.
Results and Outcomes
- Basement floor elevation was successfully restored to near-original levels.
- Subgrade soils were stabilized, effectively halting future settlement.
- Plumbing and HVAC systems can now be returned to proper alignment.
- Structural cracks and wall gaps on the first floor can now be addressed a remedied.
- The homeowners regained confidence in the structural safety and comfort of their living environment.
Conclusion
This project highlights Raise Rite’s expertise in diagnosing and resolving complex subsurface challenges, particularly in high-risk settings like homes built over former landfills. Through expert testing, meticulous planning, and the targeted use of Deep Foamjection technology, Raise Rite delivered a durable and cost-effective solution. The successful outcome ensured the long-term stability and integrity of the homeowner’s property, transforming a potentially catastrophic issue into a lasting success.
