| 摘要 |
PURPOSE:To raise the stability of a soft ground improver by lowering the gravity center of a stirrer by a method in which the driver of the heaviest stirring shaft of the stirrer is set below a subleader. CONSTITUTION:The driver 1 of the heaviest stirring shaft 5 of a stirrer is set below a subleader, and a square stirring shaft-insertion hole (consisting of 4 rollers) is provided to the rotational center of a rotary table 3. The stirring shaft 5 is fitted into the insertion hole in such a way that it can slide toward the longitudinal direction of the shaft and the rotation force of the driver 1 can be transmitted. Stirring blades 9 are turned through the stirring shaft 5 by the driver 1, the stirring shaft 5 is lowered, and while penetrating the blades 9 into soft ground, soft soil is mixed with a hardener with stirring. The heaviest driver 1 of the stirrer is positioned below the subleader to lower the gravity center of the stirrer. |
