STUDY OF STRESS AND DEFORMATION ANALYSIS IN SOFT SOIL TUNNELS USING CONVENTIONAL METHODS AND FINITE ELEMENT APPROACH

• Main Author: Caesar Cahyadi, Reagan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/82600
• Institution: Institut Teknologi Bandung

Study of stress and deformation analysis in soft soil tunnels usingAnalysis of stress and deformation in soft ground tunnels using both conventional methods and finite element approach is made as a form of contribution to the development of civil engineering knowledge. This analysis study aims to expand research on soft soil tunnels, which is currently developing in Indonesia. Important activities in this research include: comparing the results of conventional methods and finite element method (FEM) analysis for the case study of Tunnel 1 in the Jakarta-Bandung High- Speed Rail project, examining whether the tunnel design meets standards based on the analysis results, comparing the use of Earth Pressure Balance (EPB) Shield Tunnel Boring Machine (TBM) and Slurry Shield TBM for the case of Tunnel 1, evaluating and redesigning the tunnel's cross-section and reinforcement, and determining the face stability pressure for TBM in tunnel excavation. The methodology used in this analysis study includes literature review, data collection, FEM analysis, and analysis and validation with literature studies based on the obtained results. Based on this analysis study, it was found that conventional methods tend to overestimate the internal forces in tunnels in soft soil compared to FEM. According to the difference in values, the Curtis-Muir Wood conventional method provides internal force results most similar to the FEM analysis results for the case. It was also found that the tunnel design based on the QCR9230-2016 standard is not met for the soil condition at Halim Station. The redesign results of the tunnel are presented in subsection 8.2. Lastly, it was also found that the construction of Tunnel 1 in the Jakarta-Bandung High-Speed Rail project is well-suited using the slurry shield TBM construction method.