BESSAC has been involved in tunnel and microtunnel works for more than 40 years. With its strength of experience, it has been present on 5 continents. This international activity represents the majority of our annual turnover.

travaux souterrains

Work Sectors :

  • Water and Sewerage
  • Subway
  • Technical Gallery
  • Oil & Gas – Energy
  • Maritime Works

Advantages :

  • More than 250 specialists
  • A fleet of more than 40 TBMs and MicroTBMs
  • Integrated design office
  • Industrial department and factory servicing our client projects

Our Expertise :

  • Mastery of all mechanized excavation techniques: directional drilling, MicroTBM, slurry TBM, EPB TBM, compressed-air TBM, variable density TBM, hard rock TBM
  • Shafts construction & civil engineering works
  • Concept and multi-trade project management
  • International capabilities
  • Segment and jacking pipes precast

Our Experience :

  • MicroTBM: more than 90 km in the last 10 years
  • TBM: more than 100 km in the last 10 years
  • Experience in more than 30 countries
  • Complex projects from conception through to construction