Engineering-geological, geotechnical and hydrogeological parameters of the Soroska tunnel rock sequences

摘要

The detailed stage of engineering-geological and hydrogeological survey for the motorway R2 Rozria-va - Jablonov nad Turfiou assessed engineering-geological, geotechnical and hydrogeological conditions along the SoroSka tunnel route. The roles of the geological survey consisted of the verification of geology, partitioning and characteristics of the rock massif. The tunnel tubes were divided into quasihomogeneous blocks, carried out together with categorization of the rock mass in the RMR (Rock Mass Rating) and QTS (Classification of rock and semi-rock formations for underground constructions) classification systems. Geological survey has contributed to the geological knowledge by the finding that the Szin Beds manifest meta-morphic overprint typical for Turaaicum, as well as strong tectonic overprint. Over the Szin Beds in the length 1.725-2.3 km of the tunnel route (from the western portal) the bed of Gutenstein limestones/dolomites of Silicicum was north-vergently tectonically displaced. Moreover, the Szin Beds along the Soroska tunnel route are tectoni-cally reduced along an E-W to ESE-WNW trending fault zone with steep dip to N, displacing the Szin Beds with Gutenstein limestones/dolomites in their tectonic overlier on the Steinalm and Wetterstein limestone massif, as well as smaller body of Reifling/pseudoreifling limestones, all belonging to Silicicum. Results of communication tracking tests showed common direction of the groundwater currents in karstic-fissure environment towards the Evetes groundwater source and the Hrusovska jaskyna cave at the Hrusov village, as well as connections of the tunnel section with the springs in the Krasnohorska Dlha Luka area.