Use of a drill injection anchor for producing ground drainage by introducing a pumpable filter material through the drill crown into the hole to fill the hole

摘要

Use of a drill injection anchor (1) for producing ground drainage by introducing a pumpable filter material (2) through the drill crown (5) into the hole (23) to fill the hole is new. An independent claim is also included for a method for producing ground drainage using the above drill injection anchor. Preferred Features: The filter material hardens in the hole to form a solid body (24) having defined filtering properties, such as liquid permeability and filter stability. The filter material comprises glass balls of 2 mm diameter and a mineral binder for binding the filter material in the hole to form a matrix permeable for water.