ABSTRACT
Lot 2 of the Extension of the Yellow and Green Lines of the Lisbon Metro starts at the Santos Station and runs southwards across Av. D. Carlos I and Av. 24 de Julho up to the Cais do Sodré Station, connecting the Yellow Line to the Green Line. In this lot, several stages of prospection were carried out, resulting in an extensive set of field and laboratory works that enabled the preparation of the geological model and the geotechnical parameterisation of the lithological units considered in that model. In a length of only 665 m, several materials are crossed. In the survey campaign of the construction phase, among a wide range of works, 73 boreholes were driven for the geological-geotechnical, hydrogeological and geo-environmental components. Based on all information available from previous surveys and from historical and geological mapping, it was possible to draw up the geological model adopted in the Construction Design. Given the large number of results, statistical processing was used to limit and estimate the characteristic values of the parameters required in safety checks.
