DYNAMIC SIMULATION OF BLASTING GROUND VIBRATION OF TUNNEL #4 JAKARTA-BANDUNG HIGH-SPEED RAILWAY PROJECT
The blasting is the method that commonly used to excavate rock but it also can produce ground vibrations that are detrimental to the surrounding environment. Therefore, analytical research is needed by paying attention to the distance from the center of the explosion, the amount of explosives to be...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/51552 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The blasting is the method that commonly used to excavate rock but it also can produce ground vibrations that are detrimental to the surrounding environment. Therefore, analytical research is needed by paying attention to the distance from the center of the explosion, the amount of explosives to be used and the need for PPV (Peak Particle Velocity) measurements. This measurement data will be analyzed to find a predictive equation for ground vibrations, but this is not always followed up in the numerical analysis. This study tries to simulate blasting of tunnel #4 by using blastload and field monitoring data as a validation. The method that used in this simulation is finite element method supported by Rocscience’s software RS2.
The vibration measurements were done on several points on the surface above the tunnel. The cross-section that used for data analysis and processing was the blasting on July 7th 2020. This cross-sectional and numerical model was made to approach the field conditions, both geometry and input parameters. This numerical simulation was done by using damping ratio variations of 2%, 5% and 10%. The PPV results obtained were not much different from the actual PPV using damping ratio of 2%. The maximum PPV value in the model was 5.66 mm/s, while the maximum PPV from field monitoring results was 5.71 mm/s. |
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