Research Article
Study on Large Deformation Prediction and Control Technology of Carbonaceous Slate Tunnel in Lixiang Railway
Table 3
Medium term forecast results.
| Monitoring cycle (d) | Peripheral convergence (mm) | BP neural network model | GA-BP neural network model | Estimate (mm) | Relative error (%) | Estimate (mm) | Relative error (%) |
| 31 | 686.2 | 669.4 | 2.45 | 696.7 | 1.53 | 32 | 694.7 | 707.9 | 1.90 | 702.6 | 1.14 | 33 | 699.2 | 713.8 | 2.09 | 710.6 | 1.63 | 34 | 702.5 | 719.4 | 2.41 | 711.8 | 1.32 | 35 | 705.6 | 721.8 | 2.30 | 713.9 | 1.18 | Average relative error | | 2.23 | | 1.36 |
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