Process for laying a product of great length in the ground, and devices for implementing same

摘要

The invention relates to a method of laying a very long product (40) into the ground, consisting in segmenting the ground while at the same time depositing a tube (pipe) (13) and, at the same time, pulling the product, from one end, through the tube by means of a magnetic driving device (14) comprising a yoke and a core housed in the yoke, these pieces being arranged in order to produce, between them, a radial magnetic field suitable for axially immobilising the core with respect to the yoke, the tube passing through the air gap between the yoke and the core and the product being fixed to the core. The pulling force on the product is produced by moving the yoke. The invention also relates to an associated laying device as well as the magnetic driving device itself. IMAGE