Abstract: In order to monitor the health status of the operation tunnel in real time and improve the monitoring accuracy, the health system structure of operation metro structure based on BIMbased internet of things is studied by taking the monitoring project of Wangzong Section of Wuhan Metro Line No. 3 for example. According to the characteristics of monitoring indicators, such as settlement, inclination angle and acceleration, the layout of sensor network and the transmission scheme of monitoring date are described, and early warning analysis and evaluation result system interface demonstration are conducted. Based on the content construction of BIM core database and DYNAMO parameterization, a 3D modeling scheme for operation tunnel is proposed. The integration of the 3D model and multigrade warning system are realized. The visualization of monitoring and early warning is realized. The results can provide ideas for design, transmission scheme selection, monitoring early warning analysis and visualization of health monitoring system for operation metro structure.

Key words: metro structure, health monitoring system, building information modeling(BIM), internet of things, 3D modeling