The official TELT website has changed: from August 2022, becomes If you have any problems or need help, please contact us.

For the Technical and scientific community

TBM Federica in La Praz
TBM Federica in La Praz

Contributions and returns of experience

TELT papers published in scientific journals or presented at international events and congresses: reports and technical insights, written together with academics or experts, to share good practices and increase knowledge in the field of tunnelling.

Scientific papers​