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Generating Topologically Consistent BIM Models of Utility Tunnels from Point Clouds.

Lei Yang1, Fangshuo Zhang2, Fan Yang2,3,4

  • 1School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China.

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|July 29, 2023
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Summary

This study introduces a new method for accurately modeling underground utility tunnels using 3D laser scanning data. The approach improves the topological consistency of Building Information Modeling (BIM) objects, essential for urban infrastructure development.

Keywords:
hierarchical segmentationpoint cloudscan-to-BIMtopology reconstructionutility tunnel

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Area of Science:

  • Geomatics Engineering
  • Civil Engineering
  • Computer Vision

Background:

  • Urban underground space development is crucial for addressing urban challenges.
  • Utility tunnels are vital infrastructure components requiring accurate investigation.
  • 3D laser scanning in utility tunnels faces challenges like noise and occlusion, impacting data quality and BIM topology.

Purpose of the Study:

  • To propose a hierarchical point cloud segmentation method for utility tunnel data.
  • To develop a robust topology reconstruction method for Building Information Modeling (BIM) objects in utility tunnels.
  • To address inaccuracies in geometric element extraction and ensure the topological consistency of reconstructed BIM models.

Main Methods:

  • Hierarchical segmentation of point clouds into facades, planes, and pipelines.
  • An improved mean-shift algorithm for extracting wall line features.
  • A local symmetry-based medial axis extraction algorithm for pipeline identification.
  • A neighbor-searching approach to reconstruct topologically consistent BIM models based on wall and pipeline centerlines.

Main Results:

  • Successfully segmented point clouds and extracted key features within utility tunnels.
  • Reconstructed 24 BIM wall objects and 12 pipelines from a real-world dataset.
  • Demonstrated the efficiency and effectiveness of the proposed methods in creating topologically consistent 3D utility tunnel models.

Conclusions:

  • The proposed hierarchical segmentation and topology reconstruction methods significantly improve the accuracy and consistency of BIM models for utility tunnels.
  • This approach overcomes limitations of traditional 3D laser scanning in complex underground environments.
  • The validated method enhances the reliability of BIM for urban underground infrastructure management and planning.