ABSTRACT
The management of the risks associated with tunnelling work follow a systematic process, which involves identifying hazards, assessing and controlling risks. Tunnel design is different to surface structure design, because it is difficult to accurately predetermine geological and stress conditions, properties and variability along the tunnel. ADECO-RS (Analysis of Controlled Deformation in Rock and Soil) defines a method for design and construction of tunnels. The paper summarizes the main issue of this method, which is related to the design procedure and approach that ensure maximum safety level, accurate scaling and job site organization. During the construction stage (operational phase) the work process is to be verified by monitoring the Real Deformation Response. Control is developed by perfecting the design, balanced on the basis of the results of the Analysis and on the field of the possible variables that have already been planned in the design stage. The management of the different work phases is a fundamental safety aspect during tunnel construction. Limiting the number of the operators at the face and their occupancy time in that area significantly increases safety level of the excavation process.
