ABSTRACT
The design of the new high speed railway Wien—St. Polten has to go through the environmental impact assessment. With the hand-over of the environmental declaration only one design has to be worked out without any alternatives of the track layout or construction method. The Wienerwald Tunnel with the overall length of 12,9 km is one of the major sites of the whole project because it is on the critical path in terms of construction time and costs.
Drivage of the tunnel can start at several locations simultaneously. The methods used are either the NATM or TBM or a combination of both. Particularly the alternative M2A, the drivage with NATM and TBM’s, will be presented in detail. Nature of the task is the determination of the performance for the mechanised drivage with TBM’s. It is tried to get as realistic values for the performance as possible taking into account results and calculation procedures published in various articles and worked out in a thesis by Stempkowski. Performance relevant parameters of the ground, machinery, and labour are put into relation. The parameters and relations should be simple and comprehensible. As result the net driving performance is extended with the operating rate of the TBM what finally provides the construction time determining gross performance.
