The forepoling is used to support soils, rocks or constructions  through concrete pipes set in horizontal or sub horizontal position in the surrounding area using special injection mixings. This kind of preventive consolidations are generally required for the excavation of tunnels or for temporary support of the excavation face. The drilling is generally performed without the use of water and by tools that can drill holes of the diameter provided in the project and allow the regularity of the subsequent pipes and injection forepoling.