Research On Key Technologies And Prototype Design Of Railway BIM Modeling System Based On Cloud Architecture

In order to implement the strategic requirements of railway informatization development and accelerate the integration of new generation information technology and railway development.Developing digital,informatized and intelligent railway construction vigorously,that can help to solve the problem of high threshold or no special functions for the use of BIM modeling software,and also settle the difficulty in implementing local standards.The key technology research on the railway BIM modeling system based on cloud architecture is carried out,and a prototype system is initially designed.This paper is based on a large number of literature surveys and the application experience of previous railway BIM projects,to solve the problems that the current PCside BIM modeling software is cumbersome to use and difficult to share data.First,a cloud-based BIM architecture is constructed,and key technologies for system implementation are proposed,and then carried out in-depth research on these key technologies respectively;finally,the prototype system is designed.Some of the main results are as follows:（1）It’s completed the overall cloud architecture design of the BIM modeling system,clarified the business architecture,application architecture and technical architecture,and innovatively proposed the overall implementation scheme of the railway BIM modeling system based on cloud architecture.（2）It focuses on the overall service framework,parametric geometry,constraint solving and SDK design for railway BIM modeling.At the same time,considering the compatibility of existing information systems and BIM modeling results and railway engineering properties,IFD is determined as the core coding data mapping relationship and external service interface.It’s the first time to form a complete modeling service solution for railway BIM modeling.（3）Based on the research of cloud architecture and geometric modeling service,the internal mechanism of railway BIM component modeling and rapid assembly is described.（4）Based on the characteristics of railway engineering and user habits,functional prototypes of BIM modeling systems for major railways,such as lines,bridges,tunnels,subgrades,tracks,and catenary,which are designed.