Tunnel Boring Machines for Extremely Tight Radius Curves

Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 62)


Tunnel Boring Machines (TBMs) that are designed to execute extremely tight radius curves provide a number of benefits for projects located in dense urban environments with a lack of shaft site availability/access or where standard tunnel alignments are not possible. This paper explains the development of articulation systems used on these specialist machines and covers the operational range of curves that can be constructed with this technology. Other features of these Tight Radius Curve TBM’s, including spoil discharge systems and backup deck designs, are also discussed along with several case histories from recent projects in Bangkok, Thailand.


tunnel TBM Extreme Tight Radius Curve articulation 


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  1. Nippon Project Research (1990). Shield Method of Extremely Tight Radius Curve.Google Scholar
  2. Ministry of Land, Infrastructure, Transport and Tourism of Japan website: Technical standards and development history of shield construction.
  3. Foley, A. (2019). Ahead of the Curve in Bangkok. Tunneling Journal, June/July, pp 14-18.Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Terratec LtdHong KongChina
  2. 2.JIM Technology CorporationKanagawaJapan

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