Areas of Expertise
- Tunnels
- Shafts
- Sewers
- Watermains
- Subways
- Highways
- Underwater works
Tunnelling Expertise
- Tunnel drilling with jack legs and drill jumbos in both good and bad rock conditions
- Shotcrete
- Rockbolts of various types including mechanical shell, mechanical grouted shell and rebar/resin
- Wire mesh
- Ribs in rock tunnels
- Excavation of tunnels in both good and poor rock conditions with a tunnel boring machine
- Earth tunnels of various types including:
- Ribs placed using the "Monkey Hole" method
- Soft ground tunnel boring machines and shields with ribs and wood lagging for ground support
- Liner plates
- Pipe jacking reinforced concrete pipe over long distances i.e. 150 meters to 250 meters between shafts
- Various kinds of concrete work
- Cement grouting
- Excavation and concreting of shafts in both earth and rock
- Compressed air tunnelling
- Shafts excavated by raising
- Deep shafts (over 60 meters in depth)
