Removal of old buried pipes for replacement

摘要

To break up and compress old piping in cleaning up old sites, and especially rubbish dumps, a ground displacement hammer together with a press pipe is pushed through the old pipe from the start shaft, so that it is broken and displaced. the press pipe and the ground displacement hammer are released by a loose housing round the head, to be retracted through a nerve strand into the start shaft. Also claimed is an appts. with a ground displacement hammer (12) at the leading end of a cylindrical housing (8) carrying the cutting head (10), open to the rear. It has trailing insertion opening (17) for the nerve strand (18) to be drawn in with a loose sliding action and it can be kinked, where the compressed air hose (13) from the trailing end is within the press tube (14) at a drive surface (16), the ground displacement hammer (12) is linked to a retraction system and the nerve strand (18) is composed of overlapping polyethylene high pressure pipes. USe - The system is used for cleaning old rubbish dumps and replacement of pipes to carry seepage water.