Research Article
Rethinking the Water Leak Incident of Tunnel LUO09 to Prepare for a Challenging Future
Table 2
Summary of soil properties in the pinhole test.
| Specimen no. | Depth (m) | USCS symbol | SPT-N | Sand (%) | Silt (%) | Clay (%) | Water content ω (%) | Liquid limit LL (%) | Plastic index PI |
| S-14 | 20.55–21 | ML | 21 | 19 | 76 | 5 | 22.4 | 27 | 4.1 | S-15 | 22.05–22.5 | SM-ML | 20 | 48 | 52 | 0 | 25.6 | 21.4 | 0.8 | S-16 | 23.55–24 | ML | 17 | 15 | 82 | 3 | 24.4 | 27.5 | 1.2 | S-17 | 25.05–25.5 | ML | 23 | 4 | 86 | 10 | 19.5 | 35.2 | 6.4 | S-18 | 26.55–27 | ML | 24 | 20 | 74 | 6 | 21.7 | 26.5 | 3.3 | S-19 | 28.08–28.53 | CL | 16 | 6 | 56 | 38 | 42.9 | 43.9 | 20 | S-20 | 30–30.45 | ML | 21 | 15 | 84 | 1 | 25.1 | 26.1 | 1.2 |
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