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

V. Di Murro, K. Soga, E. J. Fern, L. Pelecanos, Z. Li, L. Scibile

Research output: Chapter in Book/Report/Conference proceedingChapter in a published conference proceeding

1 Citation (SciVal)

Abstract

The 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.

Original languageEnglish
Title of host publication17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings
EditorsHaraldur Sigursteinsson, Sigurour Erlingsson, Sigurour Erlingsson, Bjarni Bessason
PublisherInternational Society for Soil Mechanics and Geotechnical Engineering
ISBN (Electronic)9789935943613
DOIs
Publication statusPublished - 31 Dec 2019
Event17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Reykjavik, Iceland
Duration: 1 Sep 20196 Sep 2019

Publication series

Name17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings
Volume2019-September

Conference

Conference17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019
Country/TerritoryIceland
CityReykjavik
Period1/09/196/09/19

Keywords

  • Long-term monitoring, distributed fiber-optic sensing
  • Long-term tunnel deformation
  • Red molasse

ASJC Scopus subject areas

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

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