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Geometrization of a 3D numerical model of an underground facility based on the results of terrestrial laser scanning Cover

Geometrization of a 3D numerical model of an underground facility based on the results of terrestrial laser scanning

Studia Geotechnica et Mechanica
Volume 46 (2024): Issue 3 (September 2024)
By: Maciej Bodlak  
Open Access
|Jul 2024

Figures & Tables

Figure 1:

Stages of creating simplified spatial drawings on the example of selected excavations of the Chapel of St. Kinga and Erazm Barącz’s chambers (Maciaszek et al., 2010).
Stages of creating simplified spatial drawings on the example of selected excavations of the Chapel of St. Kinga and Erazm Barącz’s chambers (Maciaszek et al., 2010).

Figure 2:

Trimble TX8 laser scanner during measurements in the St. John Adit.
Trimble TX8 laser scanner during measurements in the St. John Adit.

Figure 3:

a), b) Generating 2D cross sections from a “point cloud” in the CloudCompare program and c) dimensioning the selected cross section.
a), b) Generating 2D cross sections from a “point cloud” in the CloudCompare program and c) dimensioning the selected cross section.

Figure 4:

a) Open polyplane of the adit, generated in the RHINO program. b) Rendering of the solid generated in the RHINO program.
a) Open polyplane of the adit, generated in the RHINO program. b) Rendering of the solid generated in the RHINO program.

Figure 5:

“Brick” zone mesh with “octree” density, generated in FLAC3D.
“Brick” zone mesh with “octree” density, generated in FLAC3D.

Figure 6:

Graphical representation of all stages of geometrization of the numerical model, based on the results of laser screening measurements.
Graphical representation of all stages of geometrization of the numerical model, based on the results of laser screening measurements.

Figure 7:

Schematic representation of the numerical model geometrization process based on “point cloud” and FLAC3D using “brick” zones.
Schematic representation of the numerical model geometrization process based on “point cloud” and FLAC3D using “brick” zones.

Code in FISH to generate a grid of “brick” zones with “octree” density_

  • model new

  • ;generate zones of rock mass around underground excavation

  • zone create brick size (5,10,5) point 0 (-9, -5.6, -8) point 1 (7,-5.6, -8) point 2 (-9, 1, -8)...

  • point 3 (-9, -5.6, 7)

  • ;import .stl file with solid of underground excavation

  • geometry import ‘Excavation.stl’

  • ;density of zones at the contact of the solid surface with rock mass zones

  • zone densify segment 2 gradient-limit maximum-length 0.1 repeat range geometry-distance ‘Excavation’ gap 1.0 extent

  • zone group ‘Excavation’ range geometry-space ‘Excavation’ count odd

  • zone attach by-face

DOI: https://doi.org/10.2478/sgem-2024-0012 | Journal eISSN: 2083-831X | Journal ISSN: 0137-6365
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Language: English
Page range: 184 - 192
Submitted on: Apr 12, 2024
Accepted on: Jun 3, 2024
Published on: Jul 18, 2024
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Terrestrial laser scanning,
mine survey,
underground engineering
Related subjects:
Geosciences,
Geosciences, other,
Materials sciences,
Composites,
Porous materials,
Physics,
Mechanics and fluid dynamics

© 2024 Maciej Bodlak, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution 4.0 License.

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