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mented with care so as not to disturb the existing tunnels. This generally leads to complex construction situations. Consequently, it is possible to have tunnel...
ABSTRACT. About 30 years ago, several single tube road tunnels with double traffic direction were build and set into operation in the alpine region (Arlberg-,...
In the case of lined tunnels, it occurs via a defect in the lining (crack, hole) or a construction element (joint, weep hole). Inspection methods. Visual inspection.
FHWA developed the National Tunnel Inspection Standards (NTIS), the Tunnel Operations. Maintenance Inspection and Evaluation (TOMIE) Manual, and the...