Mechanical laying is a process dedicated to burying networks (mainly Telecom and Power) into the ground thanks to the use of a laying unit. This unit guides cables or pipes into the trench and position them precisely as per specifications.
Thanks to our technology, trench opening and networks laying is done simultaneously and safely (no worker needs to walk into the trench).
Mechanical Laying allows to lay networks underground while opening the trench.
Click here to watch a video showing the full process
To start, reels need to be carried in front of the work area. Marais proposes a solution to carry, move and unroll up to 3 reels of 20 tons (44 000 pounds) or 6 reels of 10 tons (22 000 pounds).
2. Wrapping (optional)
In certain conditions, it is necessary to bundle cables or ducts, usually in a group of 3, so that they remain properly maintained in the trench.
A specific trenching rocksaw is designed for this process. It allows to open trenches from 23cm (9 inches) to 55cm (22 inches) wide and up to 160cm (5 feet) deep. The process can be used with large quantities of cables (more than 40) and on projects requiring laying in curbs (see below).
4. Network laying
Cables or ducts are positionned in the trench thanks to a specific shout called the laying box. Guides located inside the box protect cables/ducts and ajust their exact position in the trench. The clean trench bottom and the constant trench depth allow a steady laying. At this stage, sand can also be added in the trench in order to isolate cables.
5. Backfilling and compacting of the trench
The backfilling and the compacting are successively done when cables/ducts are inside the trench. Excavated ground piled next to the edge of the trench can be used for refilling.