JP2015140581A5 - - Google Patents

Claims (8)

A ground improvement device that improves the ground by stirring and mixing improvement materials while excavating the ground,
A nozzle for injecting the improved material to the tip in the excavation direction;
A tip excavation blade that rotates around a first rotation axis that is arranged in a direction along the excavation direction and is arranged in the vicinity of the nozzle;
It rotates around a second rotating shaft that is arranged substantially perpendicular to the first rotating shaft, and is arranged above the tip excavating blade and closer to the first rotating shaft than the tip of the tip excavating blade. A ground improvement device comprising at least two lateral excavation blades. The ground improvement device according to claim 1, wherein the tip excavation blade and the horizontal excavation blade have substantially the same rotational diameter. The at least two horizontal excavation blades are arranged so as to face each other with the first rotation shaft interposed therebetween, and the rotation directions of the opposed horizontal excavation blades are different from each other. The ground improvement apparatus of Claim 1 or Claim 2. Four horizontal excavation blades are arranged,
The pair of horizontal excavation blades arranged so as to face each other across the first rotation shaft has substantially the same size and is different in size from the other sets of horizontal excavation blades. The ground improvement apparatus in any one of Claims 1-3. The ground improvement device according to any one of claims 1 to 4, wherein a plurality of the horizontal excavation blades are arranged along the first rotation axis direction. The horizontal excavation blade has a plate-like portion that rotates with its center fixed to the second rotation shaft,
The ground improvement device according to any one of claims 1 to 5, further comprising a plurality of excavation claws arranged at a predetermined angle on the plate-like portion. Each of the horizontal excavation blades is provided with a plurality of the plate-like portions,
Among the plate-like portions, the excavation claws arranged in one plate-like portion are arranged so as to face the outside of the first rotating shaft, and the excavation claws arranged in the plate-like portion adjacent to the one are The ground improvement device according to claim 6, wherein the ground improvement device is arranged so as to face the inside of the first rotation shaft. The region excavated by excavation claws arranged on a plurality of plate-like portions of the horizontal excavation blade is 1/6 or more of the region excavated by the tip excavation blade. Ground improvement equipment.