Research Article
Propagation Mechanism Modeling in the Near-Region of Arbitrary Cross-Sectional Tunnels
Table 2
Simplification of the dividing point model in certain specific situations.
| Situation | Condition | Tunnel | Type | Dividing point |
| | (, | Rectangular | — | Min | One | ) | Circular | — | | | Arched | Type I | Min | | | Arched | Type II | Min |
| | (, | Rectangular | — | Min | Two | ) | Circular | — | | | Arched | Type I | Min | | | Arched | Type II | Min |
| | (, | Rectangular | — | Min | Three | ) | Circular | — | | | Arched | Type I | Min | | | Arched | Type II | Min |
| | (, | Rectangular | — | Min | Four | ) | Circular | — | | | Arched | Type I | Min | | | Arched | Type II | Min |
| | (, | Rectangular | — | Min | Five | ) | Circular | — | | | Arched | Type I | Min | | | Arched | Type II | Min |
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