EPB-TBM tunnelling issues on mixed faced ground at tabriz metro line 1, Iran

Ghodrat Barzegari, A. Uromeihy, J. Zhao

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

2 Citations (Scopus)


Mixed face ground condition is one of the most TBM tunnelling challenges in all over the world. Underground construction of Tabriz Metro (line-1) involved boring twin tunnel with Earth Pressure Balance (EPB) machine in alluvial deposits. Many types of problems observed during the excavation in coarse grained alluvial include high cutter-head torque, excessive tools wear, breaking of TBM cutterhead parts and ground instabilities in the form of large settlement and ground collapse. In this paper the effects of changing geological condition on TBM performance and interaction between coarse grained soils includes cobble, boulder and rock blocks with TBM cutting tools in different ground condition was evaluated. It was found that the rate of the TBM performance is highly reduced due to the variation of ground conditions.

Original languageEnglish
Title of host publicationUnderground - The Way to the Future: Proceedings of the World Tunnel Congress, WTC 2013
PublisherCRC Press
Number of pages8
ISBN (Print)9781138000940
Publication statusPublished - 2013
Externally publishedYes
EventWorld Tunnel Congress (WTC) / General Assembly of the International-Tunnelling-and-Underground-Space-Association (ITA) 2013: Underground - The Way to the Future - Geneva, Switzerland
Duration: 31 May 20137 Jun 2013
Conference number: 39th


ConferenceWorld Tunnel Congress (WTC) / General Assembly of the International-Tunnelling-and-Underground-Space-Association (ITA) 2013
Abbreviated titleWTC 2013
Internet address

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