| 摘要 |
<p>The no-dig fast laying method for telecommunications infrastructures, energy and miscellaneous utilities consists of making a horizontal pilot hole (2) in the ground by the directional drilling system, inserting a pipe of suitable diameter between the entry hole (8) and exit hole (9) through the drilling rods (4) while positioned in the ground, and finally extracting the drilling rods (4) after fixing the inserted pipe to the exit hole (9). In this manner the pipe previously inserted through the rods remains in the ground to satisfy the requirement of creating infrastructures between the entry hole and exit hole (8, 9).</p> |
