| 摘要 |
PURPOSE:To effectively perform the excavating, stirring and mixing operations of cohesive coil, etc., by rotatably attaching a co-rotation preventer having a resistance plate of a length incluting a stirring blade and projected from the excavating diameter on the upper part of the the excavating blade on the tip of the excavating shaft to the excavating shaft. CONSTITUTION:A co-rotation preventer 14 is attached to an excavating shaft 1 fixed with an excavating shaft 2 and a stirring blade 3, and the excavating shaft 1 is rotationally driven under the ground to form a hole of a diameter Da. Since the co-rotation preventer 14 is not turned, the co-rotation of soil lumps is stopped by a co-rotation-preventing blade 19, and the mixing and stirring efficiency of the soil lumps is raised. |
