| 摘要 |
PROBLEM TO BE SOLVED: To achieve an auger device and a ground improvement method that can excellently improve the ground.SOLUTION: In an auger device 10 comprising a cylindrical casing 1 and an auger screw 2 having a screw 2b spirally formed around an auger shaft 2a, since a main gear 4 that is rotated by an auger motor 3 to rotate about the auger shaft 2a, which is a tubular member capable of supplying a solidifying material S, as an axis is provided at a rear end of the auger shaft 2a, a liquid supply passage 4a communicating with the inside of the auger shaft 2a is formed in the main gear 4, and an injection port 6 for injecting the solidifying material S is connected to the liquid supply passage 4a through a swivel joint 6a. |
