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Pressure Grouting & Soil Stabilization
Pressure grouting or jet grouting involves injecting a grout material into otherwise inaccessible but interconnected pore or void space of which neither the configuration or volume are known, and is often referred to simply as grouting. The grout may be a cementitious, resinous, or solution chemical mixture.
Click the photos to read more about each job!
New York Power Authority
New York Power Authority
Pressure Grouting - Food Container Manufacturing A-1 was hired directly to resolve existing void below 2000 SF warehouse floor by reestablishing sub-base and eliminating slab movement due to vibrations from equipment during operation.
New York Power Authority
A-1 Concrete Leveling Grouting Professionals offer unique technical grouting services to TROUBLESHOOT CHALLENGING WATER CUT-OFF, SOIL STABILIZATION and VOID FILL PROJECTS in underground construction. Typical problems resolved by our hands-on technicians include large-volume high-pressure water inflows and construction through broken and water-bearing ground conditions. A-1 Concrete Leveling specializes in the application of specific grouting technologies involving cement grouts and specialized equipment.
Stronger Subgrades for Successful Projects
When pavement engineers and contractors need to increase subgrade strength or guarantee a working platform in unfavorable conditions, they look to soil stabilization and modification. With massive cost-savings and faster construction times, these technologies increase structural integrity and retain strength during wet conditions; ensuring your project stays on track, no matter what.
What Can Soil Stabilization Do For You?
Soil Stabilization is a powerful and cost-effective technology used in site development projects to improve subgrade shear strength and control shrink-swell properties for higher load-bearing capacity and uniform consistency. Think of it as an insurance policy against water, weather, and heavy delivery loads — giving your project the support it needs from the start and for the future.
Where is Soil Stabilization Used?
Stabilization and Modification can be used to add strength to almost any soil under any hard surface pavement or structural fill zone, including:
• Parking Lots
• Warehouse Floors
• Culverts
• Steel Sea Walls/Retaining Walls
• Cement Roads & Sidewalks
• Building Pads
• Pond Berms, Dikes, & Levees
• Asphalt Roads
Soil Stabilization Project at Erie Canal Culvert #103
A-1 Concrete Leveling was called to address a critical issue at Culvert #103 along the historic Erie Canal—severe seepage and embankment instability caused by groundwater bypassing the original cutoff wall, believed to have been built around 1910.
The Problem
Water was migrating beneath the canal's original cutoff wall, bypassing its intended drainage path and pouring out below the end wall at a rate of several gallons per hour. This ongoing seepage caused visible erosion of the embankment directly above the culvert, narrowing the soil structure and threatening the long-term stability of the area. Left unaddressed, this kind of structural degradation can compromise not just the affected culvert but create a domino effect on adjacent ones.
The Solution
Over the course of nearly three weeks, A-1 performed comprehensive soil stabilization and consolidation at the site. Using engineered grout injections at 53 separate ports—some as deep as 30 feet—we reinforced the soil beneath and around the culvert to reduce water migration and increase ground support.
To ensure consistent and effective results, we followed strict injection criteria:
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Ground swell monitoring to prevent hydrofracturing
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Injection volume control (no more than 15 pumps or 1 cubic foot per port)
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Pressure limit of 250 PSI, beyond which the pipe was retracted before resuming injections
In more challenging sections where boulders and riprap were present, we used specialized equipment to reach proper depth and achieve refusal.
The Outcome
By the end of the project, additional test ports confirmed soil consolidation was successful. In some areas, grout would not travel beyond 8 feet, indicating the ground was already fully compacted. This is a strong signal of effective stabilization and minimal remaining voids.
The site is now better prepared to withstand future water movement, and the embankment’s structural integrity has been restored.
Looking Ahead
With over 670 culverts along the Erie Canal, this project provides valuable insights for future work. As we continue to serve New York and surrounding regions, A-1 remains committed to delivering efficient, high-quality soil stabilization solutions that protect infrastructure for generations to come.