The Job
This stormwater pipe repair project is located at a chemical manufacturing plant in Petersburg, Virginia. The facility manager discovered a large sinkhole adjacent to a secondary containment structure holding a 10,000 gallon tank. The sinkhole appeared to extend far under the footprint of the containment structure. The structure is approximately 20 feet by 40 feet.
The Challenge
The containment structure, which was cast-in-place concrete, was coated with a coating designed specifically for the chemical makeup of the tank’s contents. Therefore, drilling holes through the floor of the structure to fill voids below it wasn’t possible.
The Solution
CJGeo proposed polyurethane grouting to seal joints. A CJGeo crew spent one day onsite installing CJGrout 35NHV61 to seal the joints and fill the sinkholes. The grouting process reestablished uniform support to the structure.
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