SLOPE STABILITY ANALYSIS CAUSED BY JAKARTA-BANDUNG HIGH-SPEED RAILWAY PROJECT #11 TUNNEL BLASTING OPERATION USING FINITE ELEMENT METHOD

• Main Author: Tarigan, Reformes
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/61758
• Institution: Institut Teknologi Bandung

The construction of the Jakarta-Bandung high-speed rail project includes a tunnel structure that was excavated using the drilling and blasting method. Vibration due to blasting activity can cause damage to rocks and can affect slope stability. This study was conducted with the aim of modeling slopes using the finite element method by comparing when given a seismic load (a) and determining the limit value of the blasting vibration level based on field monitoring so that the value of the Safety Factor (SF) which is approached with the SRF (Strength Reduction Factor) is at least 1.1. By processing empirical data in this study, it was found that there was a relationship between Peak Particle Acceleration (PPA) with Scaled Distance USBM, Peak Particle Acceleration (PPA) with Scaled Distance Blastload Equivalent, Peak Vector Sum (PVS) with Scaled Distance USBM, and Peak Vector Sum (PVS) with Scaled Distance Blastload Equivalent whose results will be correlated with the finite element method modeling that has been done previously. From the slope modeling, the SRF value for static slope modeling is 1.63, while for pseudo-static slope modeling, the SRF value is 1.4 at a value of a 0.04 g. For the slope to be stable, the limit value of (seismic load) a is 0.14 g, and the PPA value is 0.215 g must satisfied. By correlating the results of slope modeling with the finite element method with empirical data processing, the explosive charge value that explodes simultaneously (Qmax) is 2.9 kg and the maximum PVS value is 6.18 mm/s.