| 摘要 |
<p>An installation for extracting from the ground a slender object (11), such as a pipe, pile or sheet pile section, which has been driven into said ground comprises a hammer device with a ram (20), drive means (16) for moving the ram, striking means which have a striking face, oriented towards the slim object, for receiving blows originating from the ram (20) brought into movement by the drive means (16), and a pulling construction by means of which the striking means can be connected to the slender object. The pulling construction comprises cable means in loop form (23) which at their one end interact with the striking means and at their other end can be brought into interaction with the slender object (11). <IMAGE></p> |
