According with CFA technology, it is possible to drill and simultaneously radical press, trought appropriate tool and cylindric rods.
This means not to remove the hole material.
The special tool go though the soil by drilling and radial pressing, pushed by rotary desk torque, weight desk and /or crowd system.
Radial hole pression increases pile load capacity.
The absence of removed material means coast reduction (expecially in contaminated areas) and cleaned job site area.
Conical tool design cut the soil rst and press it to radial surface. This tecnology is only indicated for selected soils type.
Concrete is pumped by inner tod hole like CFA.