Research Article
Research on Surface Subsidence of Long-Span Underground Tunnel
Table 5
Settlement changes of the surface subsidence monitoring point of Junfeng Road Station in different stages.
| | Stages of change | Cumulative settlement value (mm) | Cumulative change (mm) | Proportion of total settlement (%) |
| | First stage | 0～−6 | 0～−6 | 40 | | Second stage | 0～−15 | 0～10 | 40 | | Third stage | 0～−15 | 3～12 | 10 | | Fourth stage | −10 | 5 | 10 |
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