Tunnel Boring
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Tunnel Boring
This method allows gravity drilling for large diameter pipes, that is to say from 1200mm in diameter and over distances of up to 200 meters
- The pushing equipment is installed in a pit located at one end of the section to be drilled. It is aligned in the direction and slope required.
- The tunnel boring machine is placed on the pushing equipment. After connecting the different components, we begin drilling. The tunnel boring machine is pushed forward until there is sufficient space behind it to install a steel or reinforced concrete pipe
- The pushing cylinders are retracted and the first pipe is assembled to the tunnel boring machine.
- Drilling resumes, the pushing equipment resting against the back of the pipe which itself advances the tunnel boring machine, until stopped again to install the next pipe, and so on.
- As the drilling progresses, the operator monitors the drilling axis by comparing it to a laser beam which indicates the theoretical axis. Corrections are made as the work progresses by altering the orientation of the front part of the tunnel boring machine.
| Applications | Products |
|---|---|
| Watermain - Sewer | Reinforced concrete pipe (RCP) |
| Telecommunications | Steel |
Here are some of our achievements in tunnel boring and microtunneling:
| Year | City | No. of drillings | Length (m) | Type of pipe | Type of soil | Obstacle |
|---|---|---|---|---|---|---|
| 2016 | Drummondville | 1 | 56 | TBA 1200mm | Soft soil | Railway |
| 2017 | Ottawa | 1 | 42 | TBA 1200mm | Soft soil | Road |
| 2017 | Montréal | 3 | 50 ea. | TBA 1500mm | Soft soil | Autoroute 15 |
| 2017 | Québec | 3 | 165 ea. | TBA 2100mm | Soft soil | Backfill |
| 2018 | Dorval | 2 | 90 ea. | Steel 400mm | Soft soil | Railway |
| 2019 | Montréal | 1 | 420 | TBA 1375mm | Soft soil | Highway |
| 2020 | Montréal | 1 | 165 | Steel 1486mm | Rock | Autoroute 40 |