Siting – Downtown Lisbon Metro blue line

Abstract

The estimation of liquefaction resistance is the first step in assessing the liquefaction hazard. The next important step is the assessment of possible consequences of liquefaction. The Siting case of downtown Lisbon metro blue line is presented to outstand some of the important differences, related with liquefaction assessment, between the recommendations proposed by the Eurocode 8 – Part 5 and those followed by the State of Practice (1996 NCEER and 1998 NCEER/ NSF Workshops, Youd et al., 2001), as well as to outstand that guidelines for assessing the residual strength and stiffness of potential liquefiable soils are still lacking in the Eurocode 8, or in any other international code. An effort should be made to fill in this gap.