ABSTRACT
This paper presents the main features of the project, describes briefly the geological-geotechnical conditions prevailing along the tunnel and discusses the geotechnical criteria and analysis methods adopted for design. Two main aspects are enhanced in this presentation: problems related to construction in the very soft lacustrine clays of Mexico City, affected by regional subsidence and presenting seismic amplification, and the construction of deep parts of the tunnel (down to 150 m) in areas with water pressure as high as 0.75 MPa.
