In the TBM world market, the demand for Tunnel Boring Machine (TBM) Industry is anticipated to be high for the next six years.TBM consist of the rotating cutting wheel, called cutter head, followed by a main bearing, a thrust system and trailing support mechanisms. The type of machine used depends on the particular geology of the project and are
- Soft ground TBM
- Hard Rock TBM
The most important markets are:
Canada; Germany; France, United Kingdom, Italy, Russia, China, Japan, India, Korea, Southeast Asia, Australia; Brazil; Mexico; Middle East
It’s not possible, in our opinion, approach the global TBM market without consider one of the most important tunnel in the world: the Brenner base tunnel.
The Brenner Base Tunnel (BBT) is a straight, flat railway tunnel between Austria and Italy. It runs from Innsbruck to Fortezza (55 km). If we add the Innsbruck railway bypass, which has already been built and which is the endpoint for the Brenner Base Tunnel, the entire tunnel system through the Alps is 64 km long. It is the longest underground rail link in the world. The BBT is a complex tunnel system. Besides the two main tubes and the exploratory tunnel, there are connecting tunnels, side tunnels and emergency stops plus four lateral access tunnels.
A single track runs through each of the two main tubes. The BBT consists of two tubes, each 8.1 m wide, running 70 m apart from one another. These tubes are each equipped with a single track, meaning that train traffic through the tubes is one-way. The two tubes are linked every 333 m by connecting side tunnels. These can be used in emergencies as escape routes. This configuration conforms to the highest security standards for tunnels.
A peculiar feature of the Brenner Base Tunnel (BBT) is the exploratory tunnel running from one end to the other. This tunnel lies between the two main tunnels and about 12 m below them and with a diameter of 5 m is noticeably smaller than the main tubes. The excavations currently underway on the exploratory tunnel should provide information on the rock mass and thereby reduce construction costs and times to a minimum. The exploratory tunnel will be essential for drainage when the BBT becomes operational.
The BBT runs for 64 km between Tulfes/Innsbruck and Fortezza, making it the longest underground railway stretch in the word. The BBT ends in Innsbruck in the existing railway bypass tunnel, which ends in Tulfes. A new rescue tunnel is being built running parallel to the bypass. The two-tube tunnel system between Innsbruck and Fortezza is 55 km long.
Galbiati Group builds TBM components such as planetary gearboxes, bearing supports, erectors. The company has recently realized one 4 ton-segment erector for a Tunnel Boring Machine designed for a excavation project. For more information visit the website www.galbiatigroup.it.