Show simple item record

dc.contributor.authorPinyol Puigmartí, Núria Mercè
dc.contributor.authorAlonso Pérez de Agreda, Eduardo
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica
dc.date.accessioned2014-02-11T15:30:33Z
dc.date.created2012-01
dc.date.issued2012-01
dc.identifier.citationPinyol, N.; Alonso, E. Design of micropiles for tunnel face reinforcement: undrained upper bound solution. "Journal of geotechnical and geoenvironmental engineering", Gener 2012, vol. 138, núm. 1, p. 89-99.
dc.identifier.issn1090-0241
dc.identifier.urihttp://hdl.handle.net/2117/21524
dc.description.abstractThe stability of tunnel faces supported by an umbrella of subhorizontal micropiles is analyzed by means of the upper bound theorem of plasticity. The micropiles are considered beams subjected to the kinematic motion imposed by the assumed failure mechanism. The limiting resistance of the supporting beams is first addressed. The failure mechanism imposes a displacement pattern on the beam, which is similar to the response of vertical piles subjected to horizontal load. The mechanism of beam deformation was included into the overall instability mechanism for the tunnel face stability. Limiting conditions of the beam under undrained conditions are used. A general minimization process associated with the upper bound formulation is developed. Stability conditions are described in dimensionless parameters and plotted in ready-to-use design charts. In particular, a dimensionless micropile coefficient, which includes all the relevant design parameters of the umbrella, could be isolated and plotted in undrained soil strength and tunnel geometry. A real face failure is finally described, and the required supporting umbrella is designed on the basis of the developed procedure.
dc.format.extent11 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Túnels i excavacions
dc.subject.lcshTunnels--Design and construction
dc.subject.otherTunnels
dc.subject.otherPlasticity
dc.subject.otherDesign
dc.subject.otherMicro piles
dc.subject.otherCase studies
dc.subject.otherHistory
dc.subject.otherTunnel
dc.subject.otherMicropile
dc.subject.otherPlasticity
dc.subject.otherUpper bound
dc.subject.otherDesign
dc.subject.otherCase history
dc.titleDesign of micropiles for tunnel face reinforcement: undrained upper bound solution
dc.typeArticle
dc.subject.lemacTúnels -- Construcció
dc.contributor.groupUniversitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
dc.identifier.doi10.1061/(ASCE)GT.1943-5606.0000562
dc.relation.publisherversionhttp://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000562
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac10739623
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorPinyol, N.; Alonso, E.
local.citation.publicationNameJournal of geotechnical and geoenvironmental engineering
local.citation.volume138
local.citation.number1
local.citation.startingPage89
local.citation.endingPage99


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder