Research Article
Support Measures to Prevent the Deformation and Failure of a Carbonaceous Mudstone Tunnel
Table 1
Original support measures.
| | Component | Original support measures |
| | System anchor | Φ25 hollow grouting anchor | | Locking foot anchor | Φ22 mm roll anchor | | Longitudinal connection | Rebar channel steel | | Advanced support | Single-layer small pipe | | Steel arch | I20a model steel arch |
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