Research Article
A Vibration-Isolating Blast Technique with Shock-Reflection Device for Dam Foundation Excavation in Complicated Geological Conditions
Table 3
Summary of PPV and vibration reduction factor.
| Location
of detector | Top ignition (cm/s) | Bottom ignition (cm/s) | | B (Without) | A (With) | | D (Without) | C (With) | |
| | 1# (1.0m) | 32.50 | 18.37 | 43.5% | 33.35 | 14.51 | 56.5% |
| | 2# (1.5m) | 34.40 | 19.21 | 44.2% | 21.47 | 11.09 | 48.3% |
| | 3# (2.0m) | 27.55 | 19.33 | 29.8% | 14.07 | 7.92 | 43.7% |
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