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Abstract:	3D images combine geometric and visual data in a model that allows quick and easy inspection and interpretation on a computer. On-going improvements of digital cameras and algorithms in photogrammetry, in particular for simultaneous processing of large sets of overlapping photos to a single consistent 3D model, have led to several applications of 3D images in tunnelling. 3D images are now used on conventional tunnel construction sites for digital face documentation and tunnel face mapping. 3D images are also suitable in mechanised tunnelling for capturing usually occluded areas of the tunnel face and visualising them in three dimensions. Furthermore, 3D images are generated from aerial imagery for documentation and volumetric assessment of deposited tunnel excavation material. 3D-Bilder vereinigen geometrische und visuelle Informationen zu einem Modell, das einfach auf Computern betrachtet und bewertet werden kann. Die Weiterentwicklung digitaler Kameras und der Algorithmen der Photogrammetrie, insbesondere die simultane Verarbeitung größerer Mengen digitaler Fotos zu einem konsistenten 3D-Modell, ergeben verschiedene Anwendungsmöglichkeiten rund um den Tunnelbau. Aktuell werden 3D-Bilder für die digitale Erfassung der Ortsbrust und deren Kartierung bei konventionellen Vortrieben verwendet. 3D-Bilder sind darüber hinaus geeignet für den maschinellen Tunnelvortrieb, um nicht sichtbare Ortsbrustbereiche aufzunehmen und dreidimensional zu visualisieren. 3D-Bilder bieten sich auch - luftgestützt erzeugt - für die Dokumentation und volumetrische Bewertung von deponiertem Tunnelausbruchsmaterial an.
Source:	Geomechanics and Tunnelling 8 (2015), No. 6
Page/s:	581-588
Language of Publication:	English/German

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