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Terrestrial laser scanning as a key element in the integrated monitoring of tidal influences on a twin-tube concrete tunnel / Timothy Nuttens in Photogrammetric record, vol 29 n° 148 (December 2014 - February 2015)  

Public [article]  inPhotogrammetric record > vol 29 n° 148 (December 2014 - February 2015) . - pp 402–416 Titre : Terrestrial laser scanning as a key element in the integrated monitoring of tidal influences on a twin-tube concrete tunnel Type de document : Article/Communication Auteurs : Timothy Nuttens, Auteur ; Cornelis Stal, Auteur ; Hans de Backer, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 402–416 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] Anvers (Flandre) [Termes IGN] marée océanique [Termes IGN] surveillance d'ouvrage [Termes IGN] télémétrie laser terrestre [Termes IGN] tunnel Résumé : (Auteur) In 2012, for the first time in Belgium, integrated monitoring was carried out to assess the deformations of a twin-tube tunnel below the River Scheldt in Antwerp under the influence of estuarine tides. Levelling measurements during a tide cycle showed a variation in the height of levelling bolts of up to 10 mm between low and high tide. Simultaneous strain-gauge measurements also showed a significant difference in strains. A deformation of the tunnel section during each twice-daily tide cycle, resulting in an eccentric “egg” or “pumpkin” shape, could hold large risks for the strength and durability of the tunnel structure. However, laser scanning results showed that there were no significant deformations of the tunnel's shape during the tide cycle. The laser scanning measurements resulted in a more thorough view of the deformation pattern which was much needed and improved the long-term risk assessment of the tunnel. Numéro de notice : A2014-647 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12080 Date de publication en ligne : 16/12/2014 En ligne : https://doi.org/10.1111/phor.12080 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75093 [article]

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