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<p>The rapid expansion of urban rail transit necessitates advanced three-dimensional (3D) geological modeling to support complex shield tunneling projects. Conventional modeling approaches, which rely on converting 2D data, exhibit significant limitations in providing dynamic and precise geological information for real-time engineering applications. To address these challenges, this study proposes and validates an integrated Building Information Modeling (BIM) and geological information framework.</p><p>Focusing on the shield tunneling section of Guangzhou Metro Lines 18 and 22 as a case study, the methodology involves constructing a high-fidelity 3D geological model using the AglosGeo engine. This model was subsequently integrated with the tunnel structural model on the Bentley BIM platform via secondary development, establishing a hybrid, object-oriented data structure. The framework implements Kriging and enhanced interpolation algorithms to ensure high model precision. A key innovation is the development of a “Tunnel Geological Slicing” function, which automatically generates mileage-based geological cross-sections and quantitative statistical reports on lithological distribution.</p><p>The results demonstrate a marked improvement in both modeling efficiency and visualization. The slicing function provided critical data-driven support for optimizing shield tunneling parameters and construction schemes in the case study. The successful implementation confirms that the proposed geological-BIM integration provides a robust solution for the full project lifecycle, enhancing project management standards and engineering quality. This work establishes a validated practical framework for the advanced application of integrated digital technologies in future urban rail transit projects, offering a significant contribution to the field of geotechnical and tunnel engineering.</p>

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Metro shield tunnels of 3D geology information system technology application and innovation

  • 期刊论文

  • 发表日期：

    2026年2月21日

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  • Kai Ning,
  • Fan-meng Kong

摘要

The rapid expansion of urban rail transit necessitates advanced three-dimensional (3D) geological modeling to support complex shield tunneling projects. Conventional modeling approaches, which rely on converting 2D data, exhibit significant limitations in providing dynamic and precise geological information for real-time engineering applications. To address these challenges, this study proposes and validates an integrated Building Information Modeling (BIM) and geological information framework.

Focusing on the shield tunneling section of Guangzhou Metro Lines 18 and 22 as a case study, the methodology involves constructing a high-fidelity 3D geological model using the AglosGeo engine. This model was subsequently integrated with the tunnel structural model on the Bentley BIM platform via secondary development, establishing a hybrid, object-oriented data structure. The framework implements Kriging and enhanced interpolation algorithms to ensure high model precision. A key innovation is the development of a “Tunnel Geological Slicing” function, which automatically generates mileage-based geological cross-sections and quantitative statistical reports on lithological distribution.

The results demonstrate a marked improvement in both modeling efficiency and visualization. The slicing function provided critical data-driven support for optimizing shield tunneling parameters and construction schemes in the case study. The successful implementation confirms that the proposed geological-BIM integration provides a robust solution for the full project lifecycle, enhancing project management standards and engineering quality. This work establishes a validated practical framework for the advanced application of integrated digital technologies in future urban rail transit projects, offering a significant contribution to the field of geotechnical and tunnel engineering.