Fault tree tunnel degradation
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The COB-Degradations Committee has drawn up a fault tree in which failure mechanisms related to the degradation of materials are discussed. This instrument should serve as a basis for entering into discussions with managers about the recognizability and prevalence of these mechanisms.
At the same time, the committee developed ‘Principles and methods for protection and repair of concrete structures’. This document contains an overview that indicates products and systems for the protection and repair of concrete structures (NEN-EN 1504-9) and how often they are used in the Benelux, what the costs are and how sustainable the solution is. Also, the document ‘Material degradation tunnel’ was developed. This document describes common damage scenarios: what is the main cause, what preventive measures are possible, how can this type of damage be monitored, what repair and/or maintenance methods are applicable, and what are the possible consequences? These documents are also available on this knowledge base.Â
The Degradation Committee focuses on topics such as corrosion of reinforcement and the fire resistance of materials in tunnels. In older tunnels, degradation can lead to leakage and compromise the integrity of the entire structure.Â
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