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


  • single central cable suspended bridge
  • main span of 950 m
  • composite box section
  • central suspension of the deck
  • cable with varying section made of individually protected strands
  • transversal stabilisation by torsion of the deck and contribution of the restraint forces due to the cable (purely non linear behaviour)
  • liaison fixe du câble et du tablier au centre
  • connection to left shore through a cut and covered tunnel used as anchoring
  • connection to right shore over an artificial island and through a cut and covered immersed tunnel 800 m long


project refused by popular vote in june 1996

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