Device and method for soil compaction and/or soil stabilization

A device for soil compaction and/or soil stabilization of sand or gravel, the device comprising:

• a column-shaped compaction tool;
• and
• a vibration device, the compaction tool adapted to be lowered vertically into a soil area to be compacted, which is to be compacted by vibrations of the compaction tool, the compaction tool being substantially closed at least at one bottom end to be lowered into the soil area and the vibration device being configured to be placed at an upper end on the compaction tool,
• wherein the compaction tool is moveable only in the vertical direction by the vibration device,
• wherein the compaction tool at its bottom end has a tool head on which at least one ripping tool is arranged, which is pivotable around a horizontal pivot axis into a first position and into a second position,
• wherein, in the first position, the at least one ripping tool is oriented substantially parallel to the compaction tool and in the second position is oriented substantially radially to the compaction tool and radially projects beyond a diameter of the tool head.