Abstract
The New Austrian Tunneling Method (NATM) is the most popular construction method in rock tunnel projects. Geological logging and rock mass classification are two major tasks prior to NATM tunnel excavation. Excavation face conditions are presently determined and logged by manual visual investigation for most, if not all tunnel projects. 2D geotechnical maps may then be drawn to show the locations and directions of weak planes. It is a costly and time-consuming process. To overcome the limitations of conventional approaches, image processing and information management techniques were adopted for tunnel face image storage, management, processing, interpolation, reconstruction, and visualization. An information system was used to manage and manipulate tunnel face related information, including geological description, rock mass rating and excavation face images. Image processing techniques in both spatial and frequency domains were applied to analyze and identify significant geological features (such as faults, joints and shear zones) from excavation faces. Shape-based image interpolation was then adopted to interpolate inter-slices between two neighboring captured images. Finally, a 3D image reconstruction and visualization environment was established to effectively assist geologists and tunnel project engineers in analyzing and evaluating geological characteristics of tunnel excavation faces.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.