Research Article
Development and Application of an Industry Foundation Classes-Based Metro Protection Information Model
Table 2
Information extraction time cost of MPIM and original IFC.
| Type | Construction Method (external project) | Construction Method (metro project) | Pit depth | Surrounding Rock Level |
| Original IFC | 73ms | 65ms | 91ms | 83ms | MPIM | 9ms | 7ms | 12ms | 42ms |
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