FORMATION WORK OF EXPANDED PLASTIC COLUMN UNDER GROUND

摘要

PURPOSE:To form an expanded plastic column under the ground by a method in which while a casing is pulled out, an expandible plastic material is extruded from the shaft of an earth auger. CONSTITUTION:While pulling out a casing 1 penetrated to a given depth into the ground, an expandible plastic material is extruded into a space surrounded by the casing 1 by an expandible plastic material extrusion mechanism in the shaft 5 of an earth auger 2 to form expanded plastic columns in order. The expanded plastic columns can thus be very simply formed under the ground.