Research Article
Influence of Small, Clear Distance Cross-Tunnel Blasting Excavation on Existing Tunnel below
Table 1
Vibration monitoring data of Jia Hua Tunnel Left Line.
| | Blasting sections | Blasting cycle footage | Point A | Point B | Point C | | PPV (cm/s) | Peak acceleration (cm/s2) | PPV (cm/s) | Peak acceleration (cm/s2) | PPV (cm/s) | Peak acceleration (cm/s2) |
| | Section I | 1 | 6.73 | 38.43 | 5.22 | 32.74 | 4.62 | 30.97 | | Section II | 1 | 8.96 | 62.84 | 8.05 | 39.25 | 6.21 | 35.90 | | Section III | 0.5 | 8.25 | 67.38 | 6.57 | 41.57 | 5.09 | 41.36 | | Section IV | 0.5 | 9.48 | 79.23 | 5.38 | 71.75 | 5.27 | 42.95 |
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