Piling Method and Apparatus

摘要

A pile is moved downwards by a movable part inside a piling apparatus. An apparatus body is fastened to the pile by fastening elements, during piling the movable part inside the apparatus body is moved downwards, the movable part is stopped hydraulically by medium in a cylinder space without the movable part striking the apparatus body. As the downwards directed motion of the movable part is stopped, the apparatus body and the pile fastened to it jerk downwards, after which, the movable part is moved hydraulically upwards. The counterforce of the motion affects the apparatus body and the pile fastened to it by pushing them downwards. The piling apparatus includes hydraulic cylinder cylinder to the piston of which the movable part is fastened, and to the hydraulic cylinder are connected a pressure transformer, a damping apparatus and a set of control valves to stop the movable part hydraulically.

主权项

1. A piling method in which
a pile or an equivalent being below an apparatus is moved mainly downwards by means of a movable part inside the apparatus fastening an apparatus body to the pile or equivalent by fastening elements, the movable part is fastened to a piston of a hydraulic cylinder, to the hydraulic cylinder are integrally connected a pressure transformer, a damping apparatus and a set of control valves, during piling moving the movable part inside the apparatus body downwards, by stopping the movable part hydraulically by means of medium in a cylinder space of the hydraulic cylinder without the movable part striking the apparatus body or some other part, 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, moving the movable part hydraulically upwards, whereby the counterforce of the motion affects the apparatus body and the pile or equivalent fastened to it by pushing them downwards.