This study is inspired by the impacts on a tunnel of the Sousaki volcano, in the vicinity of Corinth and examines possible impacts of the Quaternary volcanism on major engineering works in

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<p>Transit Oriented Developments’ (TOD) smooth integration with existing metro networks is a key aspect of their design, as they are located above, very close or even directly connected to existing underground metro structures. This poses a significant challenge to their structural and geotechnical design, which needs to consider and address a number of different issues, e.g. current condition of the existing metro stations &amp; tunnels, station structural system, metro-to- TOD connection, use of transfer systems, induced displacements to stations, tunnels &amp; movement joints, impact to the tracks, etc., as well as induced vibrations in the TOD buildings because of the metro operation. In this paper, the most significant aspects of these issues are shortly presented and discussed. The most common and effective ways to address them are also reviewed.</p>

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