Working in the dark is extremely demanding. Tunnelling, in particular, requires tremendous skill and enormous experience of all people involved. Our engineers and construction workers all possess extensive hands-on experience and have been successfully constructing tunnels, galleries and caverns for rapid transit, underground, and railway lines, roads, hydroelectric stations, and water supply and wastewater systems for several decades. Our underground works total in the hundreds of kilometres around the world, covering everything from conventional excavations to the jacking of man-entry pipes to cut-and-cover tunnels. This wealth of experience enables us to continuously contribute to further developments in the construction of underground routes. Our numerous technological innovations in this engineering discipline constantly open up new fields of application and help to increase the efficiency of the individual methods.
An especially outstanding characteristic of our engineers is their constant striving for perfection.Every single day, they question the status quo. This helps to optimise the cost-benefit ratio of even the most miniscule detail and ultimately leads to a more efficient construction process. Technical innovations in tunnelling open up new applications and increase the efficiency of the individual methods. Our employees are committed to keeping this up in the future.One result is that cut-and-cover tunnels often no longer have cost advantages over tunnels constructed underground. As underground tunnel construction oers considerable advantages