| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a soil improvement agitation device which can make the output of a drive unit smaller than ever before at the agitation of excavated earth and sand of unit quantity. Ž<P>SOLUTION: The ground improvement agitation device includes a rotary shaft 11, an excavation blade 14, an agitation rotor 12 formed in a round bar shape, and a rotor 17 for preventing rotation in concert with each other. The rotary shaft 11 is rotated by the drive unit, and the excavation blade 14 is provided on the tip of the rotary shaft 11. The agitation rotor 12 is provided in a position which is closer to the non tip side than the excavation blade 14 in a plurality of stages. The rotor 17 for preventing rotation in concert with each other is provided to the rotary shaft 11 with flexible rotation, and prevents rotation of the ground and the agitation rotor 12 in concert with each other. Since each of the agitation rotors 12 is formed in a round bar shape, it has smaller agitation resistance than a conventional agitation rotor constituted by a tabular member. Because of this, a low power drive unit is sufficient even for the agitation of the excavated earth and sand of unit quantity. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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