Abstract: Shield tunneling in metro engineering is beset with inadequate safety risk control, imperfect monitoring and early-warning mechanisms, data transmission delays, and limited visualization. The authors construct a comprehensive management platform framework based on digital twin technology to effectively resolve these issues. First, TBM and tunnel models are constructed using entity modeling and dynamo-based parametric modeling methods. Based on these models, a point cloud-based building information modeling updating framework is proposed for tunnel reconstruction. Then, a multi-level risk prevention and control process is established from the group to project levels, along with an environmental monitoring early-warning response mechanism and a warning method for abnormal tunneling conditions. Deploying cloud services, the authors also design a remote communication and data synchronization architecture, together with a physical-virtual synchronization logic framework, for effective data transmission, storage, and processing. Finally, a case study on the Shenzhen Metro project is demonstrated. The platform enables virtual scene visualization and construction simulation, real-time multi-parameter monitoring of TBM, TBM cluster and risk-source visualization, as well as tunneling parameter management and condition warnings. The platform greatly enhances tunneling safety and risk control efficiency, and has been successfully applied in multiple metro projects.

Key words: metro shield tunneling, tunnel boring machine, digital twin, comprehensive management platform, risk management