In a method and device for drilling, in particular impact drilling or rotary
percussion
drilling, a hole in soil or rock material and forming an anchorage in the hole,
wherein a bore hole is formed by the introduction of a drill bit, it is provided
that the drill rod assembly of the drilling device includes at least one expandable
element having at least one hollow space extending substantially in the longitudinal
direction of the bore for introducing a fluid under pressure to at least partially
widen the outer periphery of the expandable element, and/or the drill rod assembly
is connected with at least one expandable element each including at least one hollow
space substantially extending in the longitudinal direction of the bore for introducing
a fluid under pressure to widen the outer periphery, thus ensuring a safe anchorage
by the expansion of the expandable elements both over the periphery and over the
length of the device at a simplified overall construction.