Series-3 displacement tool is used for FDP lost bit method. It differs from the standard method by a detachable (sacrificial) bottom drill bit, a hollow drill stem with a larger internal diameter and a concrete hopper that is mounted at the top of hollow stem.
The displacement tool is drilled into ground by rotating & pushing. Soil is loosened by the starter auger and then pushed laterally into surrounding soil by the displacement body. On reaching the predetermined design depth, reinforcement cage is inserted into the hollow drill stem so that the bottom drill bit is lost.
During extraction of the displacement tool, concrete is simultaneously discharged
by concrete hopper and placed unpressurised in the pile through the hollow drill stem.
Customizable products are available upon customer's requirements.