Abstract: Aiming at the problems of difficult storage of massive heterogeneous data, non-sharing of information, non-intuitive display and insufficient utilization of data value in railway tunnel construction projects, et al, in this paper, BIM and large spatial data technology are used to solve the problems of distributed storage, network sharing, three-dimensional query, intelligent analysis and decision-making of massive heterogeneous data in tunnel construction projects, and to achieve efficient information management of tunnel construction projects.In this paper, the technical scheme of dynamic establishment of BIM three-dimensional model of railway tunnel is proposed, the cloud platform framework of large spatial data for tunnel construction management is designed, and a set of cloud platform for large spatial data management application of railway tunnel construction is developed. Through the successful development and application of the platform, the feasibility of the framework system is verified, and the informationization level of tunnel construction project management is improved.

Key words: BIM technology, spatial big data technology, tunnel construction informatization, data management