Research Article
Risk Evaluation Model of Highway Tunnel Portal Construction Based on BP Fuzzy Neural Network
Table 10
The comparison of the deformation value.
| Deformation value | Evaluation index | Vault settlement (mm) | Horizontal convergence (mm) | Specification allowed (mm) |
| Before the risk control | 54.91 | 46.22 | 40 | After the risk control | 6.27 | 13.32 | 40 |
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