Material development
Slurry trench wall in saline surrounding
- Suspension to support the trench made of local clay instead of bentonite
- Brine concrete
- Development of materials
- Investigation of long-term durability
Creep of rock salt
- Development of material law for primary, secondary, tertiary creep
- Development of software system for modeling
TBM
- Investigations regarding the possibility to transform sedimentary rock into an earth mud (EPB)
- Study on the adhesion of claystones
- Study on the conditioning of sands and cemented sands
- Heading concepts for sedimentary rocks in order to avoid problems
Permeability of rock
- Development of special testing technology to determine the permeability of low-permeable rock salt
Grouting
- Development of cement paste grouting in ground condition with high permeability and groundwater flow in highly permeable soil and groundwater flow
- Ultra-fine cement, PU and acrylate gel for grouting of rock masses with low permeability. Reached down to 10-8 – 10-9 m/s
- Special measurement technology
- Development of concept for grouting of anhydritic rock mass
Tunnelthermics
- Influence on structures
- Achievable output