Technopref’s precast division has produced high-precision precast concrete elements for the tunnelling industry for over 15 years. Our team of experts uses the most advanced technologies and state-of-the-art production equipment to meet the requirements of tunnel builders.

To date, we have produced close to 150 000 precast tunnel liner segments for a total of more than 35 kilometres (22 miles) of tunnels for some of the most demanding projects.


Technopref completed projects for railway tunnels, subway/light rail tunnels and wastewater sewer and storage tunnels in Minneapolis, Seattle, Pittsburgh, New York and Washington DC for public-sector owners.

In 2015 Technopref established their construction division centered on infrastructure rehabilitation and landed its first contract in early 2016 for the rehabilitation of the Francis Scott Key Bridge in Washington DC.