| 摘要 |
This invention relates to a piling method and a piling apparatus. In the piling method a pile or an equivalent is moved mainly downwards by means of a movable part (2) inside the apparatus. According to the invention an apparatus body (1) is fastened to the pile or equivalent by fastening elements (4), during piling the movable part (2) inside the apparatus body (1) is moved downwards, the movable part is stopped hydraulically by means of medium in a cylinder space (21, 22) without the movable part striking the apparatus body (2) whereby, as the downwards directed motion of the movable part is stopped, the apparatus body and the pile or equivalent fastened to it jerk downwards, after which, the movable part (2) is moved hydraulically upwards, whereby the counterforce of the motion affects the apparatus body and the pile or equivalent fastened to it by pushing them downwards. To the piling apparatus according to the invention includes a body (1 ) and a movable part (2) inside the body, and the body includes fastening elements (4) for fastening the body to a pile, the apparatus includes a hydraulic cylinder (3) to the piston of which the movable part (2) is fastened, and to the hydraulic cylinder are integrally connected a pressure transformer and damping apparatus and a set of control valves to stop the movable part hydraulically without the movable part striking the apparatus body. |
