Groundwater control technologies include a variety of applications including slurry walls or slurry trenches. These barriers are designed to stop groundwater from migrating into a construction zone or from transporting hazardous substances down-gradient.
Slurry wall construction or cutoff walls, are underground walls with very low permeability to impede groundwater flow and support excavation and structures. Cutoff walls have been used for decades to provide cost-effective, long-term solutions for many groundwater control problems. Cutoff wall construction requires the use of heavy specialized equipment – such as excavators, cranes and clam buckets – therefore work room is a factor that must be considered. To date, RECON has constructed over 10,500,000 square feet of slurry trenches. The most common application includes subsurface barriers that are constructed using the slurry trench method.
The slurry trench construction method involved excavating a designated area to predetermined below ground depths and then backfilling with heavy concrete/clay/ to form an impervious barrier. While the ground is being excavated, the trench is supported with a bentonite slurry, hence the term “slurry trench” method.
Illustration of slurry wall construction technique: