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dc.contributor.authorPinyol Puigmartí, Núria Mercè
dc.contributor.authorAlonso Pérez de Agreda, Eduardo
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2016-01-21T15:14:14Z
dc.date.issued2013
dc.identifier.citationPinyol, N.M., Alonso, E. An undrained upper bound solution for the face stability of tunnels reinforced by micropiles. A: International Conference on Soil Mechanics and Geotechnical Engineering. "Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering". París: 2013, p. 3395-3398.
dc.identifier.urihttp://hdl.handle.net/2117/81818
dc.description.abstractTunnel in difficult soils may require procedures to prevent tunnel face failures. Face stabilization can be achieved by the installation of some structural elements. This paper presents an analysis of face stability of shallow tunnels in undrained soils reinforced by an umbrella of subhorizontal micropiles. Upper bound solutions for two dimensional plane strain conditions are given including the effect of micropiles. The micropile umbrella is embedded in the soil and supported on the tunnel lining. The kinematically admissible collapse mechanism defined to calculate the upper bound solution includes the action provided by a subhorizontal micropile at limiting conditions. The solutions are given in practical dimensionless charts which are useful to quantify easily the effect of the umbrella of micropiles. The plots provide a simple procedure to design the umbrella. The most relevant properties defining the umbrella are grouped into a single dimensionless coefficient which includes the yielding conditions and the geometry of the micropiles as well as the distance between them.
dc.description.abstractTunnel in difficult soils may require procedures to prevent tunnel face failures. Face stabilization can be achieved by the installation of some structural elements. This paper presents an analysis of face stability of shallow tunnels in undrained soils reinforced by an umbrella of subhorizontal micropiles. Upper bound solutions for two dimensional plane strain conditions are given including the effect of micropiles. The micropile umbrella is embedded in the soil and supported on the tunnel lining. The kinematically admissible collapse mechanism defined to calculate the upper bound solution includes the action provided by a subhorizontal micropile at limiting conditions. The solutions are given in practical dimensionless charts which are useful to quantify easily the effect of the umbrella of micropiles. The plots provide a simple procedure to design the umbrella. The most relevant properties defining the umbrella are grouped into a single dimensionless coefficient which includes the yielding conditions and the geometry of the micropiles as well as the distance between them.
dc.format.extent4 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Túnels i excavacions
dc.subject.lcshTunnel lining
dc.subject.otherTunnel
dc.subject.otherface stability
dc.subject.othermicropiles
dc.subject.otherupper bound
dc.subject.otherplasticity
dc.subject.otherundrained strength.
dc.titleAn undrained upper bound solution for the face stability of tunnels reinforced by micropiles
dc.typeConference report
dc.subject.lemacTúnels -- Revestiments
dc.contributor.groupUniversitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
dc.rights.accessRestricted access - publisher's policy
drac.iddocument17408064
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
upcommons.citation.authorPinyol, N.M.; Alonso, E.
upcommons.citation.contributorInternational Conference on Soil Mechanics and Geotechnical Engineering
upcommons.citation.pubplaceParís
upcommons.citation.publishedtrue
upcommons.citation.publicationNameProceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering
upcommons.citation.startingPage3395
upcommons.citation.endingPage3398


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