"Locking hazardous materials in place is almost always safer and more cost effective than removing them for treatment, and there typically is no ongoing maintenance" -Clay Griffin, President of Rembco Geotechnical Contractors, Inc.
Grouting has occasionally been thought of as a more temporary solution, a stop-gap. But recent testing of two 20-year old acrylamide grout rehab projects indicate that grout can certainly stand the test of time.
Problem: Twelve manhole shafts for a mile-long tunnel, part of a trunk storm sewer being constructed 50 feet below a Dallas Freeway, had to pass through 20 to 25 feet of saturated sand before reaching bedrock.
Problem: A petroleum production water flood project was not responding well to flooding. An injection profile indicated that about half of the injected water was entering the zone between the two perforated intervals.
Jerry Brown, Operations Manager
Trenchless Technology Magazine
2000
South Fayette Township Municipal Authority (SFMA) serves the Township of South Fayette (population 13,500) located in the southwestern portion of Allegheny County, PA
During a routine facility inspection at a major West Coast paper plant in Canada, a small leak appeared near the shoreline where an underground 42-inch fiberglass reinforced plastic pipe carried effluent to diffusers in the ocean.
The use of chemical grout, the original trenchless method, continues to grow, year after year. Both awareness and sales are up significantly over five years ago, industry statistics show.
Underground Construction Staff
Underground Construction Magazine
1997
Maintaining a watertight wastewater collection system is extremely important in Austin, TX. Not only does the city want to keep infiltration out of the system, it also wants to prevent exfiltration of wastewater.
How to plan your chemical grouting program: Most infiltration enters sewers through 1. Manholes, 2. Pipe Joints and 3. Service Connections and the first few feet of the service line.
Beginning in 1985, federal and state regulatory agencies began close monitoring of the waste management operations at the US Oak Ridge National Laboratory (ORNL), as well as other Dept. of Energy (DOE) sites.
