| 摘要 |
PURPOSE:To greatly raise the efficiency of working by a method in which a soil- moving cylinder with opened tip is penetrated into a hollow tube, a vibrating force is applied, and the soil-moving cylinder is properly pulled out to discharge soil. CONSTITUTION:When penetrating a hollow tube A into the ground, the resistance between the inside surface of the hollow tube A and the packed soil is increased as the penetration proceeds until finally the penetration is stopped, and a soil-moving cylinder B with opened tip penetrates into the rear end opening of the hollow tube A. The penetration of the soil-moving cylinder B is made while giving a vibration by an oscillator C and being overlapped with the deflecting force (f) of the penetration direction. When soil and sand are packed into the soil-moving cylinder B, the soil-moving cylinder B with soil and sand is pulled out of the hollow tube A. Thus, soil and sand in the hollow tube A can be discharged rapidly and exactly. |
