A 3D digital modelling method for railway station subgrade based on generalized hexahedron

ABSTRACT

This study aims to propose an efficient modelling method for railway station subgrade based on cross-sectional data. A modelling principle is firstly established to determine the connection relationships between the adjacent cross sections with large differences. And the connected areas between adjacent cross sections are constructed into a solid model based on the method of ‘Generalized Hexahedron’. In addition, the dissection algorithm for the solid model with multi-level topology is studied, realizing the fast cross-section extraction at an arbitrary position. The proposed method is adopted to build a 3D digital subgrade model in a real case study of Ganquan North Station. The results show that the proposed method can realize the efficient modelling and analysis of the digital subgrade model.

KEYWORDS:

• Railway station subgrade
• 3d digital modelling
• modelling principle
• generalized hexahedron
• information extraction

Acknowledgments

The authors are very grateful to the State Key Laboratory of Rail Transit Engineering Informatization, the China Railway Eryuan Engineering Group CO. LTD, the China Railway Siyuan Survey and Design Group Co. LTD and China Railway First Survey and Design Institute Group Co. Ltd for supporting us with many real cases.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was partially funded by National Key R&D Program of China with grant number 2017YFB1201102, the National Science Foundation of China (NSFC) with grant numbers 51778640 and 51608543, the China Railway Eryuan Engineering Group CO. LTD with grant number 2015-41, and the China Railway Siyuan Survey and Design Group Co. LTD with grant number 2016D02-1.