| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ground improving agitation device for which the durable period of an agitation blade is made longer than before. <P>SOLUTION: In the ground improving agitation device including a rotary shaft 11 to be rotated by a drive unit, an excavation blade provided on the distal end of the rotary shaft 11, and agitation blades 12 provided less on the distal end part side than the excavation blade, each agitation blade 12 is configured by fixing a planar member 122 arranged in the direction of pushing through a solidification material and excavated sediment to a blade body 121 in a round bar shape. Since the blade body 121 is in the round bar shape, agitation resistance is smaller than that of an agitation blade comprising planar members as before. Thus, even in the case of agitating the unit amount of excavated sediment, the drive unit of small output is sufficient. Also, the planar member 122 pushes through the solidification agent and the excavated sediment that are being agitated, and reduces loads applied to the blade body 121. Since the loads locally applied to the agitation blade 12 are reduced in such a manner, damages such as a break of the agitation blade 12 are prevented. Thus, the durable period of the agitation blade 12 is made longer than before. <P>COPYRIGHT: (C)2012,JPO&INPIT |
