| 摘要 |
PURPOSE:To exactly and uniformly mix soil and a hardening liquid with stirring by a method in which an excavating shaft and a stirring shaft are alternately provided in one row, and a stirring blade turning on the horizontal face and a stirring blade turning on the vertical face are each procided to the excavating shaft and the stirring shaft. CONSTITUTION:When a driver 9 is actuated to turn an excavator 5 and excavation is made by a bit 2, excavated soil is lifted upwards to a fixed extent while being stirred by the stirring blade 16 of a stirring shaft 7. The soil is further raised by a screw 4 above the stirring blade 6 while being stirred by the stirring blade 3 of the excavating shaft 5 and the stirring blade 6 of the stirring shaft 7. The excavation is made to a given depth by the excavating shaft 5 and then the excavator 1 is pulled up. A soil hardening liquid is injected from the lower end of the excavating shaft 5 while being mixed with stirring, during which period the excavator 1 is lowered. When the excavator 1 reaches the deepest level, the excavator 1 is pulled out while being moved vertically with stirring and mixing operations. |
