Research Article
Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments
Table 2
Mix proportion of model soil.
| Crystal powder | Fine quartz sand | Coarse quartz sand | Engine oil | Fly ash | River sand | Petroleum jelly | Rosin |
| 1 | 0.35 | 0.35 | 0.15 | 0.35 | 0.65 | 0 | 0.06 |
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