Pulling pulling out device of post and manner null of pulling

摘要

PURPOSE: To extract piles certainly without being influenced by ground condition even in the case where the ground is weak against necessary extraction force, and to prevent an apparatus therefor from becoming complicated. ;CONSTITUTION: In extracting piles with tensile force of a wire rope of a crane amplified by multiple pulley block with a pile extraction apparatus that extracts the piles with the tensile force of the wire rope 5 of the crane 1 amplified by multiple pulley block, reaction force device such as a jack 8 supporting pile heads and a buoyance prevention device for holding the pile heads with a chuck 9 are provided to a support bed 3 of the extraction apparatus 2. Then, a reaction force on pulling is borne by the pile head of the installed pile 10, and thereby the extraction apparatus 2 can be prevented from sinking and falling when the extraction is executed.;COPYRIGHT: (C)1994,JPO&Japio