The soil investigations and soil mechanics insights for the underground construction of the S‐LINK

Abstract

In the process of designing the construction of the S-LINK, soil investigations are currently in progress in the project area from Salzburg Central Station via Mirabell Square, "Mozartsteg" (Mozart Bridge) and further towards "Salzburg-Süd" (southern district of the city of Salzburg). The soil investigation measures applied consider the boundary conditions of the Salzburg underground. This paper summarises the exploration methods and presents the most important results relevant to geotechnical engineering and tunnel construction. This includes results of direct and indirect explorations and of laboratory tests as well as their comparison regarding the derivation of parameters for the numerical modelling, which are provided to the general designer as a basis.

S‐LINK Salzburg gains momentum

“…Along the route, the dense exploration grid allowed for recording the depth of the different layer boundaries and categorising the lake clay in more detail into silt-dominated and fine sand-dominated layers. These layers differ, for example, in their water permeability and stiffness properties (see [5] for details).…”

“…Diese Schichten unterscheiden sich z.B. in ihren Wasserdurchlässigkeiten und Steifigkeiten (Details hierzu in [5]). In December 2022, the S-LINK project company submitted the environmental impact statement (EIS) to the responsible authority, the federal state of Salzburg, for the first sub-project, i.e.…”