Distributed fibre optic strain sensing of CERN infrastructures in the molasse region

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dc.contributor.authorDi Murro, V.
dc.contributor.authorSoga, K.
dc.contributor.authorFern, E. J.
dc.contributor.authorPelecanos, L.
dc.contributor.authorLi, Zili
dc.contributor.authorScibile, L.
dc.contributor.funderCERNen
dc.contributor.funderEngineering and Physical Sciences Research Councilen
dc.contributor.funderInnovate UKen
dc.date.accessioned2021-08-19T15:13:49Z
dc.date.available2021-08-19T15:13:49Z
dc.date.issued2019
dc.description.abstractThe European Centre for Nuclear Research (CERN) is a large underground laboratory and it is home to two large particle accelerators, including the «Large Hadron Collider» (LHC). The particles travel at the speed of light through a series of tunnels which must comply with the high serviceability requirements. However, the underground facilities have expanded over a period of 40 years with new tunnels, shafts and caverns. Structural ageing and deterioration of the infrastructure can alter the drainage conditions around tunnels and this can cause, in turn, excess deformation of the tunnels and serviceability issue for the particle accelerators. A remote monitoring system based on distributed fibre-optic strain sensing technology has been implemented in some of the concrete-lined tunnels in order to gain insight in the long-term mechanical behaviour of the underground system. This paper presents the results of the monitoring programme and the results show a slow development of ovalisation of the tunnel over a period of three years.en
dc.description.abstractLe Centre Européen pour la Recherche Nucléaire (CERN) est un grand laboratoire souterrain qui héberge deux accélérateurs de particules dont le « Large Hadron Collider » (LHC). Les particules se déplacent à la vitesse de la lumière à travers un réseau de tunnels qui doivent répondre à des exigences élevées de service. L’infrastructure souterraine du CERN s’est étendue sur une période de 40 ans avec la construction de nouveaux tunnels, puits et cavernes. Le vieillissement des matériaux et la détérioration structurelles des ouvrages peuvent altérer les conditions de drainage autour des tunnels ce qui peut engendrer, à son tour, des déformations excessives et atteindre la limite de service des accélérateurs de particules. Un système de monitoring à distance avec des câbles en fibre optique a été mis en place dans certains tunnels afin d’étudier le comportement à long terme. Cet article présente les résultats de la compagne de monitoring et démontre une ovalisation des tunnels sur une période de trois ans.fr
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationDi Murro, V., Soga , K., Fern, E. J., Pelecanos, L., Li, Z. and Scibile, L. (2019) 'Distributed fibre optic strain sensing of CERN infrastructures in the molasse region', Proceedings of the XVII European Conference on Soil Mechanics and Geotechnical Engineering, Reykjavík, Iceland, 1-6 September, pp. 1-7. doi: 10.32075/17ECSMGE-2019-0061en
dc.identifier.doi10.32075/17ECSMGE-2019-0061en
dc.identifier.endpage7en
dc.identifier.isbn978-9935-9436-1-3
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/11758
dc.language.isoenen
dc.publisherIcelandic Geotechnical Society (IGS)en
dc.relation.urihttps://www.ecsmge-2019.com/
dc.rights© 2019, the Authors and the Icelandic Geotechnical Society, IGS: All rights reserved.en
dc.subjectLong-term tunnel deformationen
dc.subjectLong-term monitoringen
dc.subjectDistributed fiber-optic sensingen
dc.subjectRed molasseen
dc.titleDistributed fibre optic strain sensing of CERN infrastructures in the molasse regionen
dc.titleDistribué fibre optique des infrastructures du CERN dans la région des molassefr
dc.typeConference itemen
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