Soletanche Bachy offers foundations and geotechnical solutions for all types of structure, from the largest international infrastructure to small local projects.

Bridges, highways, rail links, tunnels, dams, mines, power stations, buildings, towers, ports: as general contractor or specialist subcontractor, we offer foundations solutions and soil technologies for the design, construction, remediation, and commissioning of our clients projects.

Through its specialist subsidiaries, Bessac and Soletanche Bachy Tunnels, Soletanche Bachy can manage the entire chain for the creation and remediation of underground structures.


In terms of design-build, our offer comprises excavation either by tunnel boring machine or using traditional methods, tunnel lining, and all associated specialist works. To adapt to the needs of each site, we design and build our own tunnel boring machines.