Our polyurethane resin can be used to waterproof and stabilize soil around a seawall and retaining wall through a process called "polyurethane grouting." This technique involves injecting the highly expandable resin into the soil to fill voids, stabilize the ground, and create a waterproof barrier.
Here's how the process works and its benefits:
- Injection pipe: small injection pipes are driven into the soil at strategic locations along the seawall or a stainless-steel injection needle is used for swallow depths. The holes are spaced based on the soil conditions and the desired stabilization pattern - typically 1.5 ft O.C.
- Injection of polyurethane resin: A specialized polyurethane resin, often in the form of a liquid or foam, is injected into the soil through the piping or needle. The resin flows through the soil, filling voids and compacting loose areas.
- Expansion and stabilization: The polyurethane resin expands up to 30 times its original state within the soil, creating a strong and stable mass. It also fills gaps and crevices, ensuring that the soil is tightly bonded and resistant to erosion or movement.
- Waterproofing: As the polyurethane resin cures, it forms a waterproof barrier within the soil. This barrier prevents the infiltration of water, which can help protect the seawall or retaining wall from potential damage caused by water seepage and erosion.
Benefits of using polyurethane resin for soil stabilization and waterproofing around seawalls and retaining walls include:
- Increased stability: The injection of polyurethane resin improves the stability and load-bearing capacity of the soil, preventing erosion and potential subsidence issues.
- Soil consolidation: The resin fills voids and compact loose soil, providing a more solid foundation for the wall. We inject polyurethane down to just below the wall footing (mudline) and up to the drainage weep-holes or just below growth line.
- Waterproofing: The cured polyurethane resin acts as a barrier, preventing water infiltration into the soil and reducing the risk of erosion or damage to the wall.
- Non-intrusive: Polyurethane grouting is a non-intrusive method that does not require major excavation or disruption to the area. It can be performed without the need to drain water or remove existing structures.
- Cost-effective: Compared to traditional methods of soil stabilization, polyurethane grouting can be a cost-effective solution due to its efficiency and the reduced need for extensive excavation.
- Quick and efficient: The injection process is relatively fast, and the polyurethane resin cures quickly, allowing for a rapid completion of the project.
- Environmentally Safe: Our polyurethane resin has been lab tested and verified in meeting ANSI 61 Standard for use in and arounds potable water and ground water.
Site-specific factors and conditions should be considered before proceeding with any soil stabilization project and we can evaluate this for you.
