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Performance monitoring of a secant-piled wall using distributed fiber optic strain sensing / Hisham Mohamad in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 12 (Décembre 2011) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1236-1243 Titre : Performance monitoring of a secant-piled wall using distributed fiber optic strain sensing Type de document : texte imprimé Auteurs : Hisham Mohamad, Auteur ; Kenichi Soga, Auteur ; Adam Pellew, Auteur Année de publication : 2012 Article en page(s) : pp. 1236-1243 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Monitoring  Retaining  wall  Excavation  BOTDR  Sensors  Inclinometer  Piles  Struts  Deformation Résumé : An optical fiber strain-sensing technique, on the basis of Brillouin optical time domain reflectometry (BOTDR), was used to monitor the performance of a secant pile wall subjected to multiple props during construction of an adjacent basement in London. Details of the installation of sensors and data processing are described. Distributed strain profiles were obtained by deriving strain measurements from optical fibers installed on opposite sides of the pile to allow monitoring of both axial and lateral movements along the pile. Methods for analyzing the thermal strain and temperature compensation are also presented. Measurements obtained from the BOTDR were found to be in good agreement with inclinometer data from the adjacent piles. The relative merits of the two different techniques are discussed. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i12/p1236_s1?isAuthorized=no [article] Performance monitoring of a secant-piled wall using distributed fiber optic strain sensing [texte imprimé] / Hisham Mohamad, Auteur ; Kenichi Soga, Auteur ; Adam Pellew, Auteur . - 2012 . - pp. 1236-1243. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1236-1243 Mots-clés : Monitoring  Retaining  wall  Excavation  BOTDR  Sensors  Inclinometer  Piles  Struts  Deformation Résumé : An optical fiber strain-sensing technique, on the basis of Brillouin optical time domain reflectometry (BOTDR), was used to monitor the performance of a secant pile wall subjected to multiple props during construction of an adjacent basement in London. Details of the installation of sensors and data processing are described. Distributed strain profiles were obtained by deriving strain measurements from optical fibers installed on opposite sides of the pile to allow monitoring of both axial and lateral movements along the pile. Methods for analyzing the thermal strain and temperature compensation are also presented. Measurements obtained from the BOTDR were found to be in good agreement with inclinometer data from the adjacent piles. The relative merits of the two different techniques are discussed. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i12/p1236_s1?isAuthorized=no