The Josef Underground Laboratory (UL) is located 60km south from Prague in a belt of metamorphosed volcanic and volcano-sedimentary rocks (tuffs and tuffets mainly) that were later intruded by younger rock types (granodiorites). The Josef UL is operated by the Centre of Experimental Geotechnics of the Faculty of Civil Engineering, CTU in Prague and it is primary intended for education, training and R&D.
Topics of experiments related to the geological deep repository (GDR) involve swelling clays behaviour and its long-term stability, hydraulic and gas permeability of rock massive, large scale in-situ tests (buffer, backfills, plug) and tracer tests.

The Josef UL is accessible for all types of activities – training, internship, technical visits, etc..

For more information, please contact Dana Pacovska (CTU).