Drilling with bored pile grab can be applied in nearly all types of soil, with or without groundwater.

For drilling with bored pile grab duty cycle crawler cranes of the HS series are used as carrier machines.

The bored pile grab penetrates the ground in free fall and loosens it with a combined deformation and shear movement.

The digging grab is positioned at the bottom of the borehole. The ground is loosened by closing the spherical shells.

Cased boreholes are always recommended when the building ground is not stable enough.

Mainly casing oscillators, type VRM, are used for drilling with bored pile grab.

For difficult soil conditions or long casing sections, casing rotators, type RDM, are used.

Compared with rotary drilling rigs, boreholes can be installed with a larger distance between carrier machine and drilling axis.

After the final drilling depth has been reached, the reinforcement cage is inserted and, subsequently, concrete is filled in.

For drilling operations with restricted headroom, special short booms and drilling tools are available.