Research Article
The Influence of Moisture Content on the Time-Dependent Characteristics of Rock Material and Its Application to the Construction of a Tunnel Portal
Table 3
Physical and mechanical properties of the rock mass and support.
| | Properties | Strong-weathered
slate | Completely weathered
slate | Initial lining | Second lining | Antislide pile | Landfills |
| | Bulk volume /(kN/m3) | 23 | 18 | 22 | 25 | 25 | 22 | | Elastic modulus/MPa | | | | | | | | Poisson’s ratio | 0.35 | 0.4 | 0.2 | 0.2 | 0.2 | 0.2 | | Cohesion /MPa | 0.25 | 0.10 | — | — | — | — | | Friction angle /° | 30 | 20 | — | — | — | — | | Elastic bulk modulus /MPa | 327.1 | 32.3 | — | — | — | — | | Elastic shear modulus /MPa | 158.5 | 15.2 | — | — | — | — | | Viscoelastic shear modulus /MPa | 6108.1 | 593.4 | — | — | — | — | | Viscosity coefficient /(MPa·h) | 9072.3 | 889.0 | — | — | — | — |
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