FIELD: construction.
SUBSTANCE: invention relates to construction; it can be used in trenchless replacement of old underground pipelines in repairment and reconstruction of underground communications. The method includes destructive impact on the old pipeline with a working body, passage of the latter along the axis of the old pipeline with pulling a new pipeline, using the working body adapted for laying a new pipeline of a greater diameter than the old pipeline, and extraction of fragments of the old pipeline to the surface through its unbroken part. The working body is adapted for laying of a new pipeline of a different diameter. Laying of a new pipeline of the required diameter is carried out by the working body connected to a strike device connected by a tension cable through an anchor to a winch. Fragments of the old pipeline are extracted by compressed air or other methods and removal mechanisms.
EFFECT: saving of an inner surface of a new pipeline, when replacing the old one, expansion of the field of application by provision of a possibility of laying a new pipeline of a different diameter.
1 cl, 2 dwg
