3D back analysis studies of “término de Odivelas” tunnel in Lisbon. Application of a risk assesment methodology to evaluate potencial damages on buildings
DOI:
https://doi.org/10.14195/2184-8394_116_1Keywords:
Tunnels, Soil-structure interaction, 3D retroanalysis, Risk analysis of damage in buildingsAbstract
In this paper it is presented the Término de Odivelas tunnel, comprised in the Yellow Line ex - ten sion of Lisbon’s underground. This case study includes the results observed during the tunnel’s construction – which occurred during the year of 2003 – and the adjustments to the parameters defining the empirical cur - ves that foresee the movements induced by the tunnel construction. Back analysis studies are executed and des cribed, with evidence to tridimensional numerical formulations that have allowed to draw some con clu - sions on geotechnical parameters and characteristics of the geological formations affected by the tunnel’s cons truction (the soil is comprised in the usually designated Benfica’s Formation). Then, it is proposed and described a risk assessment methodology able to evaluate the potential damages caused in those pre-existing buil dings. The results obtained through the use of this methodology, giving evidence to tridi men sional numerical formulations, are compared with the case study of a five-storage building located near the Odivelas tunnel. In the final, major conclusions regarding the importance of the building’s rigidity and its interaction with the surrounding scene are drawn.
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References
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