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Published in:
2025 | OriginalPaper | Chapter
Construction of Underground Roads and Tunnels Beneath Sensitive Infrastructures in Singapore
Authors : How Yen Pan, I. Yogarajah, T. G. Ng, S. C. Teo, J. L. Xie
Published in: Proceedings of the 5th International Conference on Transportation Geotechnics (ICTG) 2024, Volume 3
Publisher: Springer Nature Singapore
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Abstract
Construction of underground roads, Mass Rapid Transit (MRT) tunnels and pedestrian underpasses within a built-up matrix of roads and infrastructure is becoming a common requirement in a city state like Singapore. Some of these underground structures tend to pass below busy roads, vehicular bridges and station boxes. Construction of these underground structures could possibly be disastrous if displacement and stresses within the system are not understood and controlled. This is especially true if the soil conditions are varied and weak. One of the more common means of carrying out these construction systems is by Pipe Box Tunnels (PBT) which consists of steel pipes arranged in a box form and internally supported by steel frames. This paper will discuss two different scenarios of the use of the PBT system detailing the design concepts, concerns and solutions. Details will be provided regarding the instrumentation and readings. The design predictions will also be discussed to show differences that occur.