To provide a means for preparing good quality improved soil by surely preventing occurrence of a corotating phenomenon of improved soil when an improved post body for enhancing bearing force of ground is prepared.
In this ground improvement agitating machine 100 with a corotation prevention mechanism, the corotation prevention mechanism comprises a rotating member 14 fitted rotatably and externally into a base end side of a rotary shaft 10, a corotation prevention member 15 extended up to the vicinity of an excavating agitating blade 12H along an axis of the rotary shaft 10 from the rotating member 14 and a supporting member 16 for elevatably and rotatably supporting the rotary shaft 10, holding the corotation prevention member 15 at a desired position and elevatably supporting the member 15.
OKUNO TOMOHIKO
HORI KAZUO
TAHIRA KOJI
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