Tunneling Ground Classification: squeezing_potential
Rock mass classification systems for tunnel design — RMR (Bieniawski 1989), Q-system (Barton 1974), GSI (Hoek 2002), NATM classes, and squeezing potential (Hoek & Marinos 2000) with support requirements, TBM performance parameters, and convergence estimates
| classification system | rock class | GSI max (dimensionless) | GSI min (dimensionless) | Q max (dimensionless) | Q min (dimensionless) | RMR max (dimensionless) | RMR min (dimensionless) | rock class variant |
|---|---|---|---|---|---|---|---|---|
| squeezing_potential | minor | 50 | 35 | 4 | 1 | 60 | 41 | minor |
| squeezing_potential | moderate | 35 | 20 | 1 | 0.1 | 40 | 26 | moderate |
| squeezing_potential | none | 100 | 50 | 1,000 | 4 | 100 | 60 | none |
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