A method for trenchless replacement of supply lines laid in the ground

摘要

A method for trenchless replacement of laid in the ground, from unstable old pipes (12), in particular lead pipes, supply lines, wherein an old pipe (12) by means of a by a tractor (16) through the old pipe (12) drawn cutting tool (24) is cut, the tube strips (28) by means of a through the old pipe (12) drawn expansion body (44) into which the supply line surrounding ground region (10) are displaced and a new pipe (50) is drawn in, characterized in that, in a first step, the section of the existing pipe thereby ensuring multiple cutting thereof to be replaced (12) on its entire length, without widening of the existing pipe thereby ensuring multiple cutting thereof (12) is cut and that in a second step, after completion of the cutting step of the expanding bodies (44) by means of the cut-open old pipe (12) is pulled.