| 摘要 |
PROBLEM TO BE SOLVED: To prevent the loss of a discharged soil quantity in reverse rotation by forming a wall with a casing on the outer periphery of a screw, and feeding air or a liquid from the lower end of the casing. SOLUTION: A stirring device 7 is connected to the lower end of a hollow pipe 2 protruded with a screw 3, and a casing 12 is fixed to the outer periphery of the hollow pipe 2 in this earth removing device 30. The drop of excavated soil at the time of extraction is prevented by feeding air or a liquid into the casing 12 from its lower end, and the excavated soil is discharged. The earth removing device 30 introduces the excavated soil into the screw 3 at the time of an excavation by forward rotation, maintains the introduced soil as it is during extraction by reverse rotation, stirs and mixes the excavated soil and a solidifying agent with a stirring device 7, and discharges the excavated soil introduced on the screw 3 on the ground surface. The excavated soil can be reliably discharged, such a situation can be avoided that the discharged soil quantity is lacking, and the excavated soil can be easily discharged from a soil discharge hole. |
