The interplay of face support pressure and soil permeability on face stability in EPB tunneling

Panagiotis Sitarenios, Dimitrios Litsas, Michael Kavvadas

Research output: Chapter in Book/Report/Conference proceedingChapter

3 Citations (Scopus)

Abstract

The paper discusses the results of 3D finite element analyses to investigate the effect of face support pressure and soil permeability on face stability conditions in EPB tunnelling. Two main types of face behavior are identified: Undrained conditions ahead of the tunnel face, typically occurring in soils with permeability less than about k=510-7m/s, are shown to be favourable for face stability; analyses show that an applied face pressure comparable with the initial hydrostatic pore pressure is sufficient for adequate face stability, even for soils of relatively low strength. Drained or partially conditions, typically occurring in soils with permeability higher than about k=510-6m/s, show that face stability is strongly dependent on the horizontal effective stress of the muck in the excavation chamber; the presence of even a small effective stress in the muck is very beneficial for face stability conditions and can be a possible explanation of successful EPB tunnelling through relatively permeable soils.

Original languageEnglish
Title of host publicationITA-AITES World Tunnel Congress 2016, WTC 2016
PublisherSociety for Mining, Metallurgy and Exploration
Pages2514-2523
Number of pages10
Volume4
ISBN (Electronic)9781510822627
Publication statusPublished - 1 Jan 2016
Externally publishedYes
EventITA-AITES World Tunnel Congress 2016 - San Francisco, United States
Duration: 22 Apr 201628 Apr 2016

Conference

ConferenceITA-AITES World Tunnel Congress 2016
Abbreviated titleWTC 2016
CountryUnited States
CitySan Francisco
Period22/04/1628/04/16

ASJC Scopus subject areas

  • Civil and Structural Engineering

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  • Cite this

    Sitarenios, P., Litsas, D., & Kavvadas, M. (2016). The interplay of face support pressure and soil permeability on face stability in EPB tunneling. In ITA-AITES World Tunnel Congress 2016, WTC 2016 (Vol. 4, pp. 2514-2523). Society for Mining, Metallurgy and Exploration.