Numerical and analytical simulation on large tunnel lining in Singapore soil condition

• Main Author: Oei, Raymond Jun Rong
• Other Authors: Yang Yaowen
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2023
• Subjects: Engineering::Civil engineering
• Online Access: https://hdl.handle.net/10356/172208
• Institution: Nanyang Technological University

Large-diameter MRT tunnelling and other underground infrastructure constructions have been prevalent in recent years specifically Steel-Reinforced Fibre Concrete (SRFC), as it is increasingly implemented in the construction industry due to its increased stiffness, ductility, ultimate strength, and toughness. However, there is still a lack of understanding in performance of the large liner and design experiences with larger-diameter tunnels in Singapore soil conditions. Understanding, investigating, and monitoring the performance of the liners, from liner casting to installation and during operation using embedded fibre optic sensors, would greatly comprehend the effect of a larger tunnel system. Additionally, compared with predicted numerical and analytical analysis, these data could give a deeper knowledge with more precise predictions for the future. However, due to time constraints and delays in the physical testing of the liner, the project will split into different phases of simulation, and practical testing. This project aims to study the numerical and analytical aspects of the large size diameter, to gain valuable insight into the behaviour on the tunnel lining. The numerical simulation will be utilizing data output from Plaxis 2D into Staad.Pro while the analytical simulation will use Matlab software with Muir Wood and Curtis equation. This process will be simulated in Singapore geological soil profile. This report will be able to bring a better overview of the performance of large concrete liners in the Singapore soil profile. By obtaining valuable test data to verify the design assumptions and assess any risks associated, the use of large-size SFRC liners in Singapore soil conditions in both simulation and in-situ works will provide a greater knowledge for any relevant works in the foreseeable future.