Infrastructure
Ground Freezing
Ground Freezing
APPLICATION
Ground freezing is a temporary ground support technique that is used extensively for groundwater control and ground stabilization in underground construction and deep excavation projects. The process involves circulating refrigerated liquids through a series of subsurface pipes to freeze the ground creating a solid barrier that prevents water intrusion and provides structural support for excavation.
Boart Longyear manufactures ground freezing drill rods that are installed for refrigerated liquid circulation. Freezing rod applications have some unique challenges that are not found in typical foundation construction drilling applications. Boart Longyear has conducted extensive development processes to ensure the freezing rods we provide incorporate our knowledge of construction drilling as well as unique technologies that are special to the ground freezing application.
Each ground freezing project has its own distinctive challenges which make the tooling requirements unique. Boart Longyear can design the tooling package to meet your specific needs.
PRODUCT RANGE
- Freezing rods in various diameters and lengths up to 6 m.
- Driving rods with various bit configurations including carbide tips and flushing holes with check valves
- Rotary drive flanges
- Rotary percussive freeze rod systems, upon request
KEY FEATURES
- Specially selected steel for the strength required for drilling, while also remaining stable when subjected to extreme low temperatures
- Specially designed threads that maintain a tight seal in the drill string, preventing leakage of freezing fluids into the surrounding ground
- Custom-designed rod seals that can withstand low temperatures as well as tolerate various greases commonly found on drilling sites
- Various configurations of driving points incorporating carbide inserts, flushing holes with check valves, and percussive bits
- Economical rod designs keeping total project cost to a minimum
- Freezing rods, sealed
- Freezing bits, sealed
- Rod, Centralizer extension
- Rod, Centralizer
- Drive Flange, sealed