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Tunnel by-pass, Flüelen, Switzerland
Four tunnel casting lengths in only 9 days
Typically, these so-called cavern cross-sections of this order of magnitude are built in two to three stages – firstly, the arched side walls in two stages and then the arched slab. However, in order to construct the inner ring in the very short time of only four weeks (including the formwork assembly), the TUF consortium decided in favour of the PERI technical solution. This was comprised of a tunnel formwork construction which allowed the concreting of a complete crosssection in one pour. As only four stages were to be completed – and due to cost reasons – this could be carried out without the need of integrated hydraulic equipment.
After a problem-free assembly time of just three weeks, site crews were able to construct the four stages, with section lengths of 5.50 m, in only nine working days. The short stripping phase of about seven days brought the construction phase to a successful end for all concerned.
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| PERI Systems In Use |
VARIO GT 24 Girder Wall Formwork
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Felix Bissig and Hansruedi Walker, Supervisors
“We received the most cost-effective solution from PERI. In spite of the large-scale dimensions of the work involved, we could concrete the complete cross-section in one pour!”
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| Contractor: |
Arge TUF (Murer AG, Prader & Co. AG, Zschokke Locher AG, Rothpletz Lienhard+Cie AG und CSC Impresa Costruzioni SA) |
| Field Service: |
PERI Switzerland, Ohringen |
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Field Service:
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PERI AG, Schweiz
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PERI scope, DE, 01/2004
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