Proceedings of the Rocscience International Conference 2025 (RIC 2025)

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Impacts of Sydney Metro City & Southwest Tunnel Construction on Existing Rail Tunnels – Belmore Park Case Study

Authors
M. Pournaghiazar1, *, A. Merritt2
1Principal Geotechnical Engineer, PSM, Sydney, G3 56 Delhi Road, North Ryde, NSW, 2113, Australia
2Principal Geotechnical Engineer, PSM, Sydney, Australia
*Corresponding author. Email: Mohammad.Pournaghiazar@psm.com.au
Corresponding Author
M. Pournaghiazar
Available Online 7 December 2025.
DOI
10.2991/978-94-6463-900-1_21How to use a DOI?
Keywords
Impact Assessment; FE Modelling; Real Time Monitoring
Abstract

The Sydney Metro City and Southwest Tunnelling and Station Excavation Works were undertaken in highly developed urban areas in close proximity to a wide range of existing infrastructure. Demonstrating the effects resulting from the project works are acceptable to the existing infrastructure is an important requirement for both design and construction. The rail tunnel crossings located approximately 100m north of Sydney’s Central Station is of particular importance where the Sydney Metro twin bore TBM running tunnels cross under the alignment of the existing Eastern Suburbs Railway (ESR) tunnels with a proximity of less than 3m.

Impact assessments on the existing ESR tunnels resulting from construction of the Metro tunnels were informed by numerical modelling using Rocscience RS2 FE analysis. Detailed real time in-tunnel monitoring of the ESR tunnels was undertaken during construction and is compared to the modelling results confirming the actual effects were consistent with those predicted from numerical models.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the Rocscience International Conference 2025 (RIC 2025)
Series
Atlantis Highlights in Engineering
Publication Date
7 December 2025
ISBN
978-94-6463-900-1
ISSN
2589-4943
DOI
10.2991/978-94-6463-900-1_21How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - M. Pournaghiazar
AU  - A. Merritt
PY  - 2025
DA  - 2025/12/07
TI  - Impacts of Sydney Metro City & Southwest Tunnel Construction on Existing Rail Tunnels – Belmore Park Case Study
BT  - Proceedings of the Rocscience International Conference 2025 (RIC 2025)
PB  - Atlantis Press
SP  - 225
EP  - 233
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-900-1_21
DO  - 10.2991/978-94-6463-900-1_21
ID  - Pournaghiazar2025
ER  -