FTJ Method (Twin-flow cement slurry jet mixing method)

In the FTJ method, hardening agent is injected from twin nozzles at the tip of the mixing blades, to install large cross-section improvement all at once. Twin-flow slurry injection results in high-speed installation, which shortens schedules. By employing compressed air the loosened soil can be discharged at the surface, avoiding the effects of displacement on existing structures.

●Improvement Column Forms & Standard Specs

Improvement column

Jet discharge