owner
state of geneva - departement of public works - bridge
division
project
- highway twin bridges in prestressed concrete
- multiple frame of six spans, double beam bridge
- total length 304 m
- side spans 36 m, main spans 56 m
- loriginal width 11 m, after widening 13.90 m
- total costs chf 21'000'000.-
scope of work of T ingénierie sa
conceptual design, detailed design, construction
management and site supervision
particularities
- execution without any reduction of trafic (60'000 veh/day)
- launching of a temporary bridge placed crosswise on the two bridges to allow the circulation of the trafic
- creation of a permanent transversal imbalance in the structure to relieve the inside beam and concentrate the shear force strengthening in the enlarged exterior web
- direct concreting of the new structure against the old one, without any cleavage joint
- additional longitudinal and transversal prestressing
- monolithical behaviour of the final “composite” structure
schedule
construction 1996-1998