Roadway Lifting and Stabilization
CST has over 24 years of experience in helping transportation departments extend the life of their transportation infrastructure by integrating our CST polyurethane injection process. In a single application, we can stabilize and densify the roadway base, fill voids, and lift and level the roadway back to grade. Our process will compact and stabilize the support soils and help mitigate future erosion and settlement.
- No-Excavation
- Quick and Cost-Effective
- Re-establish Bearing Capacity
- Lift, Level, and Realign
Transportation Applications
Roadway Settlement Repair
CST provides Departments of Transportation with the CST Deep Injection Process, whereby a structural industrial grade polyurethane is injected into the base soils of the roadway to stabilize and reestablish the weight-bearing capacity of the soil. The roadway can be compromised due to a variety of issues: age, repurposing, geological, prior construction techniques, continuous vibration, etc. The CST polymers are a powerful tool for rehabilitating the roadway, as its application is versatile for repairing a wide scope of problematic conditions.
Here’s how it works: The polymers are injected through 5/8″ holes through the surface of the roadway, whereby 1/2″ steel rods are inserted into the problem zones underneath the roadway. The polymer is then injected into the subsurface to stabilize and densify the weak zones. The polymer initially enters the zone in liquid form and then begins to expand throughout the soil media, binding the soils and pushing away any water that may be present. This allows public works directors and engineers to utilize the CST product for multiple roadway repair applications, including problems relating to sewer failure or soil loss.
Sewer Inflow and Infiltration
CST offers innovative solutions for trenchless sewer repair, manhole rehabilitation and culvert repair. Our chemical grout injection process is highly adaptable and non-disruptive, allowing for public works managers and engineers to design a sewer repair solution that is cost-effective and minimizes operational downtime of facilities and roadways.
The trenchless sewer repair process is ideal for both sanitary and stormwater sewer systems as well as culverts, outfalls, drainage systems, culverts and utility trenches. Learn more here…
Bridge Abutment and Footer Rehabilitation
CST provides Engineers, Transportation Departments and City and County municipalities with innovative bridge approach slab repair solutions. Bridge approach slabs are susceptible to settlement due to a variety of external factors that degrade the roadway base soils over time, such as continual vibration, water movement and drainage, or failures of other soil containment systems.
CST offers a no-excavation solution for bridge approach slab repair through the use of high-density, light-weight structural polymers. The polymers are injected beneath the concrete slab through ½” metal rods that are inserted through the slab and into the weak soil zones. Because the polymers are hydrophobic, any standing water will be pushed out and the soils will be protected against future degradation from water flow or vibration.
Railroad Ballast Stabilization
Airport Runway Leveling and Stabilization
Bridge Transition Realignment with Polyurethane Injection
CST provides rehabilitation services for the repair of roadways, railroads and runway strips. Our no-excavation solutions stabilizes base and sub-grade soils to ensure the structure is adequately supported. This roadway lifting process can be used to rehabilitate the structure opposed to excavation and replacement. Polyurethane injection for roadway lifting and stabilization is a non-invasive rehabilitation approach. The process works as follows:
- Injections are made through 5/8” holes that are drilled through the slab
- Once Injected, the polyurethane travels throughout the voids and expands up to 25 times through the soil
- The polyurethane is a high-density, structural polyurethane that increases the soil bearing capacity and re-establishes the bridge approach/departure slab’s weight back to the soil.
