After boring to specified depth (bearing layers), injecting in boring slurry, root-hardening　cement slurry is pumped in to a boring tip part. Then pulling up earth auger while fixed slurry pumping into bored hole, it builds to a hole and a pile is installed into root hardening slurry by pressing or light blowing.
By root hardening and round of pile fixed slurry, a pile and the layers are made to unify and bearing capacity is ensured. Although it can piling works in low vibration and low noise.
For application pile diameter, about 300-600mm and the maximum pile length are about 35m.