A REVIEW OF EXPANSIVE PHENOMENA IN WAGENBURG NORTH TUNNE
2023; Volume: 33; Issue: 129 Linguagem: Inglês
10.18257/raccefyn.33(129).2009.2375
ISSN2382-4980
AutoresIván Berdugo, Eduardo Alonso Pérez de Ágreda, Enrique Romero, Antonio Gens, María Albis,
Tópico(s)Rock Mechanics and Modeling
ResumoThe paper deals on tunnelling and swelling in anhydritic-gypsiferous claystones. The geology of the Gipskeuper in Baden-Württemberg (Germany) and the phenomenology of expansions in Wagenburg North tunnel are described. Consistent swelling triggering events, mechanisms and exhaustion causes were identified using a thermo-hydro-chemo-mechanical theoretical analysis. It is suggested that long-term swelling in tunnels excavated through anhydritic-gypsiferous claystones is a result of solvent-way gypsum crystal growth due to ventilation induced groundwater evaporation and rock drying; an opposite concept to the usual consequences of drying in argillaceous materials, which causes shrinkage strains
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