Safety Monitoring Twin System for Three Major Building Super-Large Excavation Pits Based on Internet of Things Technology

With the rapid development of economy and urbanization, the scale and number of super-large excavation pit projects have surged. However, the construction of super-large underground space structure is faced with challenges such as complex underground environment and many risk factors, and its safety problems are becoming more and more obvious. Aiming at the complex problems faced in the construction process of ultra-large underground space structure, the paper proposed an intelligent safety monitoring system suitable for the construction of ultra-large underground space structure by introducing the Internet of Things technology and the concept of digital twin, and explored the integration mechanism of Internet of Things and digital twin. BIM technology was applied in the twin to establish the corresponding physical construction model, and multi-source heterogeneous monitoring data was collected in real time through the Internet of Things technology to realize the information interaction between the virtual construction model and the physical construction model. The real-time safety analysis of multi-source heterogeneous data was carried out with the help of the twin system, and the safety status of the structure was obtained and fed back to the application service layer. The effectiveness and practicability of the twin system in the construction of super-large excavation pits were verified by an example project.