Abstract: The invention relates to a method and device for crushing and mixing soil and a soil improving agent in order to regenerate soft or sticky soil. According to the method of the invention, the soil and the soil improving agent are cut, crushed, and mixed by a crusher (7) in a primary cutting, crushing, and mixing process, and are then struck, crushed, and mixed in a secondary cutting, crushing, and mixing process. The device of the invention comprises the crusher (7), a rotary cutter (13) at the upper part of the crusher (7), a striker (10B) at the lower part thereof, and a conveyor (8) arranged on a vehicle body (3).

Abstract: The present invention provides a crawler type soil improving machine for efficiently crushing and mixing soft soil and a soil improving agent in order to regenerate such soil, and features excellent mobility and operability. The soil improving machine comprises: a crusher (4), disposed substantially at the center of a vehicle body (3), for crushing and mixing soil and a soil improving agent; a first hopper (40), disposed at one part of the vehicle body (3), for receiving soil; a second hopper (20), positioned between the crusher (4) and the first hopper (40), for receiving soil improving agent; a crawling member (2), arranged under the second hopper (20) and the vehicle body (3); a drive unit (5), arranged at the other part of the vehicle body (3) and including an engine (6) and hydraulic units (9, 10); and a conveyor (50), positioned below the first and second hoppers (40 and 20).