| 摘要 |
PURPOSE:To keep the height of the titled improver of larger scales for soft ground at a minimum one by using a holder which can be freely moved vertically for a fixed distance in relation to the frame body. CONSTITUTION:A hollow stirring shaft 22 provided with a stirring blade 23 is attached to a base plate 12, and many slits through which a hardening agent is jetted are drilled in the surrounding of the stirring blade 23. The base plate 12 is vertically moved along a holder 11 by driving a motor 13 attached to the front of the base plate 12, and the position of the stirring blade 23 attached to the tip of the stirring shaft 22 is changed at any time in the soft ground. Since, as the stirring blade 22 goes down during the hardening treatment, the whole of the device can be lowered concurrently, the need to provide long rotary shaft is eliminated and the device can thus be made smaller. |
