Base for extractable support column - has spring arms and base plate embedded in concrete plug which remains after column removal

摘要

This base is used for support columns which are extracted from ground after completion of a building structure. The column lower part is covered with a parting agent preventing adhesion of the concrete. Into the tubular column lower end are pushed holding spring arms of the baseplate. The column lower end is inserted into the borehole and concrete is poured into tubular column to the spring arms and baseplate. The column is readily extracted and the base with concrete plug remains in borehole bottom. The remaining borehole is filled with concrete while the tubular column is extracted.