Abstract
AbstractAs part of the project “PPP Ostregion Paket 1”, a tunnelling project is being constructed on the basis of a performance specification for the first time in Austria, with the entire geological risk being borne by the contractor. The two‐tube Tradenberg tunnel, each tube carrying one traffic direction, is in the S1‐West section of the 51 km long Y‐Trasse to be constructed by the consortium Bonaventura. The overall length of the tunnel is 2,457 m or 2,423.5 m, of which 1,403.6 m or 1,359 m are to be mined underground. The entire section is to open for traffic in early 2010. The contract model has the effect of transferring competence to the contractor. This opens a wide range of organisational possibilities for the construction consortium, but accompanied by an enormous increase in responsibility and commercial risk.
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