Device for widening boreholes, in particular for producing bored piles with a widened pile foot

摘要

The invention relates to a device for widening boreholes, in particular for producing bored piles with a widened pile foot, which has a guide body which can be clamped in place in a borehole and has a guideway which is inclined towards the borehole axis and in which a cutter is arranged in a sliding manner. This cutter can be a drop cutter, preferably designed as a free-fall cutter. In another embodiment, the cutter can also have a separate hydraulic or pneumatic percussion effect. IMAGE