| 摘要 |
The present invention relates to a drill stirrer connected to a lower end of a stirring rotary shaft of an auger apparatus to excavate and stir the ground when a deep cement mixing (DCM) method is applied. The drill stirrer for improving hard soil includes a rod connection part mounted at the lower end of a stirring rotary shaft of an auger apparatus; a main body post extended to the lower end of the rod connection part to be rotated; multiple auxiliary stirring wings rotating with the main body post, while being connected to a middle portion of the main body post by being spaced apart at predetermined intervals, and stirring slurry injected into an underground drilling hole together with soil of a natural ground; and a drill stirring part rotating with the main body post while being connected to the end of the main body post at the lower part of the auxiliary stirring wings, spraying high-pressure water or high-pressure air when digging through the ground, and stirring slurry together with the natural ground soil when drawing, wherein the outer peripheral surface of the main body post, the surface of the stirring screw, and the surface of the main stirring wing are coated with ceramics to prevent a mud ball phenomenon in which stirred slurry and natural ground clay are matted, and resistance to intrusion and drawing is minimized. |
