N5 Solothurn – Biel, Tunnel Birchi
The Birchi tunnel is a section of the N5 highway in the Canton of Solothurn (N5/2 section Nennigkofen – Zuchwil.
Dati principali
- Type of tunnel: double tube with 2 lanes per driving direction
- Length: 2 x 1'400 m (2 x 700 m underground, 2 x 700 m open-cut)
- Profile: horseshoe profile with bottom slab (in open-cut section base plate)
- Excavation cross-section: 100 m²
- Geology: lower fresh water molasse
- Type of heading: pilot tunnel with partial excavation of roof section, face and invert, excavated with part-section machine
- Stations: at both portals
- Ventilation: longitudinal ventilation (jet ventilators)
- Infrastructure: power supply, lighting, safety/ communication equipment, supply of water for fire fighting
- N5 Solothurn – Biel, Tunnel Birchi (325 KB)
Committente
Office for National Roads of the Canton of Solothurn
Progettazione
IUB Engineering Ltd. in consortium
Periodo di costruzione
1993–2001
Costi dell'opera
160 Mio. CHF
Prestazioni
- Construction project
- Tender and comparison of tenders
- Execution project
- Supervision of works
- Documentation on the project
According to the terms of reference of the overall project management, the consortium - under the leadership of IUB (certified according to ISO 9001) - drew up a QC plan with annual audits for all partners (project work and supervision of works).