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The Degradation Of Concrete Tunnel Wall Panels: A Case Study, Christian Paglia
The Degradation Of Concrete Tunnel Wall Panels: A Case Study, Christian Paglia
International Conference on Durability of Concrete Structures
Concrete panels are often used along tunnel walls for technical and aesthetic purposes. Generally, the environment in contact with such materials is aggressive. Emission gases from the vehicles, sulphates, chlorides coming from the winter salt spreading, high temperature and humidity promote an acceleration of the deterioration phenomena. In this work 30 years old concrete panels placed along a 16 km long highway tunnel across the Alps were investigated with respect to their durability. The focus was given to the tunnel entrance zone. This region of the tunnel exhibited a critical environment with respect to the durability of the cementitious material …
Finite Element Modeling Of Thermal Effect On Airport Slabs, Chuanyue Shen
Finite Element Modeling Of Thermal Effect On Airport Slabs, Chuanyue Shen
International Conference on Durability of Concrete Structures
A sub-ground tunnel connecting two concourses of a terminal at Chicago O’Hare International Airport suffered from water leakage. The airport engineers suspected that the problem was caused by high stresses impinging on the tunnel structure by the pavement sections above the tunnel, acting to damage joints and waterproofing membranes that should have prevented such leakage. To provide a fundamental solution to this problem while minimizing the interference with airport operation, a repair strategy needs to be determined based on a clear understanding of the root cause. A preliminary field inspection confirmed that the concrete pavement slabs moved significantly when ambient …