HJ Foundation installs underneath water basements and structures using either soil mixing or tremie seals. We cater to the most cost-effective alternative for our clients.

Common Uses

  • Minimize dewatering costs
  • Create barriers to side or bottom groundwater flow
  • For deep excavation below water tables
  • Cofferdams 

Technical Details

Tremie Seals have been used for centuries. In fact, some of the earliest tremie seals have been discovered under Roman bridges. With a long history of efficiency, a tremie seal aids an excavation to minimize water intrusion. When you’re excavating deep, along a shoreline, close to a river, nearby a body of water, or below a water table, dewatering the site/excavation will be a challenge. A tremie seal is a non-reinforced concrete slab anchored by piles against buoyancy and installed underwater by divers within sheet piling or slurry walls to control water intrusion.

Typically, the perimeter sheet piling is installed, followed by anchored production piles. The tremie is poured and when the concrete slab gets hard enough, the excavation can be dewatered.