... Artificial Intelligence tunnel structure maintenance work deterioration process asset and portfolio management repair work Poisson process criteria maintenance one-way traffic control inspection critical soundness prediction soundness deterioration maintenance model soundness...

... ABSTRACT: This paper reports the case histories of foundation deterioration in the Portuguese Varosa and Venda Nova arch dams. The main characteristics of the works, the geological conditions, the observation systems, the detection of the abnormal behaviours, and aspects of the repair works...