Assessment of Geomechanical Properties of Intact Opalinus Clay
For analytical and numerical calculations for the engineering feasibility assessment of a deep geological repository for disposal of nuclear waste in the Opalinus Clay and its maximum depth below ground surface, NAGRA established geomechanical parameters that are based on a large number of laboratory test results. Results from uniaxial compression, triaxial compression and oedometer tests were used to quantify the effective strength properties, the undrained shear strength and both, drained and undrained elastic properties of intact Opalinus Clay. The authors of this report were commissioned by ENSI to review and judge these geomechanical properties in terms of completeness and reliability.
This review report addresses the conceptual constitutive framework for Opalinus Clay and the simplifications proposed by NAGRA, provides the geomechanical fundamentals that are needed to adequately judge the experiments on intact Opalinus Clay and their interpretation, and assesses in detail the various test series on intact Opalinus Clay utilized and interpreted by NAGRA.
Verknüpfte Dokumente
Nachforderung zum Indikator „Tiefenlager im Hinblick auf bautechnische Machbarkeit“ in Etappe 2 SGT
Assessment of Geomechanical Properties, Maximum Depth below Ground Surface and EDZ Impact on Long Term Safety
Die maximale Tiefe der HAA- und SMA-Lager aus bautechnischer und sicherheitstechnischer Sicht stellt ein wichtiges Kriterium für die Optimierung der Lagerperimeter und die Auswahl der Standortgebiete in SGT Etappe 2 dar. Bei der bautechnischen Machbarkeit geologischer Tiefenlager ist die minimale Schädigung der geologischen Barriere zu berücksichtigen. Dafür spielen die felsmechanischen Grundlagen v. a. des Opalinustons […]