state of geneva
department of public works
bridge division


project competition for the crossing of the lake in geneva - switzerland

scope of work of T ingénierie sa

general manager of the multidisciplinary projet team
main bridge conception and design
competition won in 1995 with a cable stayed and a suspended solutions


  • curved cable stayed bridge with a single central suspension
  • three main spans of 350 m each, two adjacent spans of 176 m each
  • concrete box section
  • self balanced bridge, horizontal soft stabilisation by its own piles
  • access bridges with spans from 36 m to 56 m
  • depth of foundations : 75 m below lake bottom
  • connection to right shore over an artificial island and through a cut and covered immersed tunnel 800 m long
  • total cost : chf 280'000'000.--
  • detailed project has been completed


project refused by popular vote in june 1996

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