The mitigation of the vibration effects caused by tunnel blasts in urban areas: a case study in Istanbul |
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Authors: | Cengiz Kuzu |
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Institution: | (1) Mining Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey |
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Abstract: | Ground vibrations generated by commercial explosives in tunnel construction may cause structural damage in urban areas. Therefore,
suppressing the vibration effects and mitigating the possible hazard after blasting is important. We present a new method
of controlled blasting that is environmentally friendly, and easy to utilize for tunnel construction. Small charges in this
method are detonated sequentially to produce minimum side effects. The efficiency of the charges may be increased based on
the previously monitored shots. This method is utilized in a tunnel construction in Istanbul with five experimental shots.
In these experiments, the duration and also the quantity of explosives were carefully controlled. We were able to obtain better
results with short durations (480 ms) instead of long durations (9,000 ms) although the vibration levels defined as peak particle
velocity (PPV) became bigger while the quantity of the explosive charge increased from 3.088 to 9.264 kg. |
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Keywords: | Blast vibrations Ground vibrations Tunneling with explosives |
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