A Holistic Multi-domain Association Model for Railway Geographical and Geological Data

Facing the needs of digital twins for the whole life cycle of railway, aiming at the problems of independent expression, decentralized management and difficult in-depth integration of continuously changing railway geographic and geological data for a long time, this paper proposes an integrated expression model of the three-domain association of "ontology domain-change domain-state domain" for railway geographic and geological data, which takes railway geological and geological elements as an inseparable whole. This paper defines a multi-level spatial -temporal change association relationship between state level-entity level-process level, with spatial-temporal change as the center and change participants (elements), drivers (events) and presentation modes (processes), constructs a knowledge graph of railway geological data with multi-domain association, and finely portrays the semantic association relationship between geological elements-events-processes. The importance and potential of the model in typical tunnel construction applications are analyzed.