Research Article
Rethinking the Water Leak Incident of Tunnel LUO09 to Prepare for a Challenging Future
Table 3
Summary of the pinhole test results.
| | Specimen no. | Final head (mm) | Colour cloudiness | Pinhole size after test (mm) | Specific surface area (m2/g) | Dispersion classification |
| | S-14 | 50 | Moderately dark | 3 | 3.20 | D | | S-15 | 50 | Barely visible | 2 | 3.27 | D | | S-16 | 50 | Moderately dark | 3 | 3.11 | D | | S-17 | 50 | Dark | 4 | 2.95 | D | | S-18 | 50 | Dark | 4 | 2.84 | D | | S-19 | 180 | Clear | 1 | 6.18 | ND | | S-20 | 50 | Moderately dark | 3 | 3.07 | D |
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Note: D = dispersive soil; ND = nondispersive soil.
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