How Polyurethane Grout Injection Works for Stormwater Infiltration Prevention

During a period of heavy flooding, stormwater systems become more susceptible to erosion and the infiltration of polluted water. For municipalities, infiltration of polluted stormwater means costly treatment of water and infrastructure repairs to damaged pipes.

The Stormwater Infiltration Issue

• Ground water rising and falling puts hydrostatic pressure on pipe and manhole joints causing them to fail.
• Water flowing in and around catch basins and roadways causes soil to erode.
• Water flowing into failed joints erodes soil from around the infrastructure causing potholes, cave-ins, and loss of structural integrity of the storm water system. Pipes can become misaligned causing much more expansive problems. 

The Solution: Polyurethane Grout Injection

• Point grouting is a method of driving injection pipes to the points of failure and injecting a resin such as Spetec PUR H200.
• The resin expands and cures quickly to seal off the leaks and fill voids in the soil.

The Favorable Outcome

• Sealing the joints prevents further soil erosion.
• Filling the voids with a resin like Spetec PUR H200 reduces the hydrostatic pressure on the joints.
• The resin also permeates the soil and increases the load bearing capacity which can prevent future misalignment of the pipes.

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