DYNAMIC SIMULATION OF BLASTING GROUND VIBRATION USING 3 DIMENSIONS AT TUNNEL #11 JAKARTA-BANDUNG HIGH-SPEED RAILWAY PROJECT

• Main Author: Muhajir, Afdhal
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/61613
• Institution: Institut Teknologi Bandung

Excavation using blasting is the method most often used to excavate relatively hard rock. Besides it also can produce ground vibrations that are detrimental to the surrounding environment. This research attempts to simulate the blasting of Tunnel 11 using a blastload and monitoring as validation. The method used in this simulation is the Finite Element method using 3 dimensions software is Rocscience RS3 to get waves from all directions. The research begins with monitoring vibrations due to the explosion at Tunnel 11 with a distance of 110 m. Tranverse PPV result 0,89 mm/s, vertical 0,92 mm/s and longitudinal 1,35 mm/s. The PPV results are the reference for verification of the numerical model. Overall the numerical model is made close to the conditions in the field, both the model geometry and the input parameters. The model results explain that the higher the surface PPV, the higher the blastload value, the higher the PPV value. The NPV results obtained are not much different from the actual PPV by correcting the blastload coefficient multiplied by 5,8. Model verification of the Tunnel 11 blasting value obtained Actual PPV and model with Standard Error Estimation longitudinal 0,267, transverse 0,225 and vertical 0,189.