3D images for digital tunnel face documentation at TBM headings - Application at Koralmtunnel lot KAT2 / 3D-Bilder zur digitalen Ortsbrustdokumentation bei TBM- Vortrieben - Anwendung beim Koralmtunnel Baulos KAT2
Author(s): |
Andreas Gaich
Markus Pötsch |
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Medium: | journal article |
Language(s): | English, German |
Published in: | Geomechanics and Tunnelling, 2016, n. 3, v. 9 |
Page(s): | 210-221 |
DOI: | 10.1002/geot.201600018 |
Abstract: |
Within the scope of a research activity of ÖBB-Infrastruktur AG (Austrian Federal Railways) improvements for tunnel face documentation during TBM tunnelling are investigated. This contribution presents an autonomous imaging unit for taking videos of the tunnel face. The unit is installed during maintenance shift in the cutter head of a hard rock TBM. While turning the cutter head, a video is taken. Simultaneously a smartphone that also controls the camera tracks the orientation of the imaging system. From the video a consistent three-dimensional image is generated using latest algorithms from photogrammetry. The resulting 3D images are used for determining single block detachments from the tunnel face as well as quantifying the planarity in general. They serve for enhancing geological mapping including the determination of discontinuities and provide comprehensive and objective documentation information. First successful applications at Koralmtunnel lot KAT2 showed the value of this new way of documentation and measurements. |
Keywords: |
face documentation geological mapping tunnel face documentation
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Available from: | Refer to publisher |
Structures and Projects
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data sheet - Reference-ID
10073241 - Published on:
27/06/2016 - Last updated on:
27/06/2016