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3D numerical modelling of shallow tunnel in weathered granite incorporating multi-stage excavation and pre-support
Sarder M. Yahya1, Rini A. Abdullah2, Mohd Ashraf Mohamad Ismail3, Hisham Mohamad4, Muhammad Azril Hezmi5, Siti Norafida Jusoh6.
Generally tunnelling in urban ground condition is not always favourable due to the tunnels’
susceptibility to major displacement especially when excavated in the soft soil and/or weak
weathered rock formation. Apart from conventional support systems, pre-support measure like
forepoling umbrella arch is frequently used to reinforce the ground. Modern computational
tools allows the inclusion of multi-stage excavations and pre-support which was not possible in
two dimensional (2D) plane strain. This paper demonstrates the three dimensional (3D) finite
element analysis of Pahang-Selangor raw water transfer tunnel, as a reference case, where
multi-stage excavation and pre-support are incorporated as intrinsic part of the model. The
New Austrian Tunnelling Method (NATM)-3 segments which encountered Grade III weathered
granite, having shallow overburden cover, was selected for numerical analysis using RS3
software. Comparison between simulated and observed data has shown good agreement
during verification.
Affiliation:
- Universiti Teknologi Malaysia, Malaysia
- Universiti Teknologi Malaysia, Malaysia
- Universiti Sains Malaysia, Malaysia
- Universiti Teknologi PETRONAS, Malaysia
- Universiti Teknologi Malaysia, Malaysia
- Universiti Teknologi Malaysia, Malaysia
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Indexed by |
MyJurnal (2021) |
H-Index
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6 |
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0.000 |
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0 |
Indexed by |
Scopus 2020 |
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CiteScore (1.4) |
Rank |
Q3 (Engineering (all)) |
Additional Information |
SJR (0.191) |
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