Storm drains are designed to move water safely away from roads, parking lots, and commercial properties. When functioning properly, they help reduce flooding and protect surrounding infrastructure from water damage. But when leaks develop or the soils surrounding a storm drain begin to erode, the problem often extends well beyond the drain itself.
As water escapes through damaged joints, cracks, or deteriorated connections, it can carry surrounding soil with it. Over time, this hidden erosion creates underground voids that may lead to pavement settlement, cracking, or damage to other underground utilities. Fortunately, these issues can often be addressed before complete replacement becomes necessary. In this article, we’ll explain how polyurethane injection helps stabilize soils and rehabilitate storm drains with minimal disruption.
How Storm Drain Damage Causes Soil Loss
Many storm drain problems begin below the surface, long before visible damage appears. As structures age, joints can separate, cracks can form, and groundwater may begin flowing where it shouldn’t. This constant movement of water gradually removes the soils supporting both the storm drain and the pavement above it. Some common warning signs include:
- Settlement Around the Drain: Pavement surrounding the storm drain begins to sink or become uneven as supporting soils disappear.
- Recurring Pavement Cracks: Cracks that continue to reopen after repair may indicate movement caused by underlying voids or shifting soil.
- Standing Water: Water collecting around the drain instead of flowing properly may signal damage within the structure or surrounding soils.
- Surface Depressions: Small depressions often develop as underground voids continue to grow.
- Visible Water Infiltration: Water entering or exiting through cracks and joints accelerates soil erosion and structural deterioration.
Repairing Storm Drains Without Excavation
Instead of removing and replacing an entire storm drain, polyurethane injection offers a minimally invasive method for restoring both the surrounding soils and the structure itself.
The repair process begins with an inspection to determine where leaks, voids, and weakened soil are located. Once the repair plan is established, technicians drill small access holes and install injection ports at strategic locations.
Polyurethane is then injected into the surrounding soils as a liquid. As it expands, the material fills underground voids, strengthens loose soil, and seals the pathways where water is entering or escaping. This helps restore support beneath the pavement while reducing future erosion around the storm drain.
Once injection is complete, the repair is verified through final inspection methods, which may include geophysical testing to confirm the surrounding soils have been successfully stabilized.
Long-Term Protection for Stormwater Infrastructure
Addressing soil loss early can significantly extend the service life of a storm drain while helping prevent more extensive pavement and roadway repairs. By stabilizing soils and reducing water infiltration, polyurethane injection restores support where it’s needed most without the expense and disruption of excavation.
Stabil Solutions provides storm drain rehabilitation solutions that help municipalities and infrastructure owners repair aging infrastructure quickly and efficiently. If you’ve noticed settlement, cracking, or signs of soil loss around your storm drains, contact Stabil Solutions to learn how polyurethane injection can help protect your infrastructure for years to come.