| 摘要 |
PURPOSE:To fluidize the ground, and agitate the soil sufficiently by providing to the top and bottom of a bit for injecting a soil agitation liquid agent with rod-like blades and by mounting nozzles below the upper blades and above the lower blades so that the jet streams of the agent from these nozzles generate vortex movements between the upper and lower blades. CONSTITUTION:A pipe 1 equipped with a bit B is suspended via a rotary joint 2 by a crane 3, and is supported rotatably by a rotary support 4; the agent is injected there through. The top of pipe-like body 10 of a bit B is linked with the pipe 1 via a coupling member 11 and its bottom with an earth auger head 13 via a coupling member 12. Rod-like blades 14, 15, 16 and 17 are mounted around the top and bottom of the bit body 10. The brackets 18 and 19 at the lower part of the upper blades 14 and 15 are provided with the nozzles 20 and 21 respectively, and the brackets 22 and 23 of the lower blades 16 and 17 with the nozzles 24 and 25 respectively. The directions of the nozzles 20, 21, 22 and 23 are determined so that vortex movements of the agent streams may be produced between the upper and lower blades. |
