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Abstract: The evaluation of the variability of the civil works duration and cost for the realisation of a tunnel is a determinant factor in choosing the optimal project planning and configuration alternative. The design, construction and operation of tunnels is associated with risks due to a lack of geotechnical information, the severity of a wrong construction choice, and the consequences that an...
Abstract: Face instabilities in blocky rock conditions may have great effects on normal tunnelling operations, especially if the excavation is performed by tunnel boring machines. Increasing maintenance requirements, construction delays and cost overruns are generally registered in these conditions. In this context, the Decision Aids for Tunnelling (DAT) represent a very useful tool to assess, on a...