Research Article
Study on Stability of Tunnel Surrounding Rock and Precipitation Disaster Mitigation in Flowing Sand Body
Table 2
The composition of sand bodies with different particle sizes.
| | No. | D10 (mm) | D30 (mm) | D50 (mm) | D60 (mm) | Dav (mm) | Nonuniformity coefficient (Cu) | Curvature coefficient (Cc) |
| | 1# | 0.095 | 0.15 | 0.19 | 0.22 | 0.241 | 2.32 | 1.08 | | 2# | 0.120 | 0.18 | 0.24 | 0.27 | 0.274 | 2.25 | 1.00 | | 3# | 0.086 | 0.14 | 0.22 | 0.27 | 0.263 | 3.14 | 0.84 | | 4# | 0.098 | 0.16 | 0.19 | 0.22 | 0.219 | 2.24 | 1.19 |
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