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dc.contributor.authorde Santos, C.
dc.contributor.authorLedesma Villalba, Alberto
dc.contributor.authorLloret Morancho, Antonio
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica
dc.date.accessioned2012-05-31T15:13:30Z
dc.date.created2009
dc.date.issued2009
dc.identifier.citationde Santos, C.; Ledesma, A.; Lloret, A. Effect of soil saturation changes on pressure on tunnel linings. A: International Conference on Soil Mechanics and Geotechnical Engineering. "Proceedings of the 17th International conference on soil mechanics and geotechnical engineering : the academia and practice of geotechnical engineering". Alexandria: IOS Press, 2009, p. 1766-1769.
dc.identifier.isbn978-1-60750-031-5
dc.identifier.urihttp://hdl.handle.net/2117/15956
dc.description.abstractIt is well known that changes in soil degree of saturation have an important influence on mechanical soil properties. Decreasing suction in soil leads to an increase of specific weight and to a decrease of stiffness and strength. These mechanical changes may have an important influence on underground works, particularly on subsurface tunnels. In fact, decreasing soil cohesion due to saturation reduces arching effects above tunnels. Recent developments in unsaturated soil behaviour include numerical models coupling hydromechanical phenomena and considering elastoplastic constitutive laws. However, these techniques are seldom used in practical applications. This paper presents a methodology to compute stress and strain changes in a tunnel lining due to changes in soil saturation, using relatively conventional tools. The motivation of this work comes from a real case in Barcelona, where a Metro tunnel received an increment of loading due to loss of cohesion of upper layers after irrigation. The Finite Element programme “PLAXIS” was used. The paper concludes that the effect of soil saturation changes on underground structures can be assessed by using conventional Finite Element codes, if the variation of stiffness and strength with suction is previously known. The analyses presented in the paper show that changes in density and stiffness due to saturation have little influence on the stresses in the sidewalls of a subsurface tunnel. However, reduction of cohesion due to suction changes may reduce arching effects above the tunnel and would generate high stresses in the tunnel lining.
dc.format.extent4 p.
dc.language.isoeng
dc.publisherIOS Press
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Túnels i excavacions
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
dc.subject.lcshTunnel lining
dc.subject.lcshSoil mechanics
dc.subject.otherUnsaturated soil
dc.subject.othersuction
dc.subject.othertunnel
dc.subject.otherlining
dc.subject.otherarching
dc.titleEffect of soil saturation changes on pressure on tunnel linings
dc.typeConference lecture
dc.subject.lemacTúnels -- Revestiments
dc.subject.lemacMecànica dels sòls
dc.contributor.groupUniversitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
dc.rights.accessRestricted access - publisher's policy
drac.iddocument9640318
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
upcommons.citation.authorde Santos, C.; Ledesma, A.; Lloret, A.
upcommons.citation.contributorInternational Conference on Soil Mechanics and Geotechnical Engineering
upcommons.citation.pubplaceAlexandria
upcommons.citation.publishedtrue
upcommons.citation.publicationNameProceedings of the 17th International conference on soil mechanics and geotechnical engineering : the academia and practice of geotechnical engineering
upcommons.citation.startingPage1766
upcommons.citation.endingPage1769


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