The Audi Tunnel project at Ingolstadt demonstrates an exemplary application of the use of compressed air in modern civil engineering. In this case, the top down construction method with compressed air has not only been more economic than any other alternative, but has also contributed to the viability of the underground works in this particularly sensitive location. The method may well be regarded as a rather straightforward application of fundamental civil engineering skills. Nevertheless it requires a detailed investigation into the boundary conditions of different projects and the adaptation of the technology to suit each variance. As with any advanced technology, this may provoke considerable demand for expertise and for highest professional standards. Additionally, such elite technical undertakings can only evolve in the presence of sound managerial and entrepreneurial competence.
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