Abstract: The BeijingXiong′an intercity railway airport tunnel is facing the risk of differential settlement and abnormal ground invasion. For an easy and intuitive understanding of the safety and health status of the tunnel structure throughout the entire life cycle, realtime online monitoring is essential. Herein, an optical fiber sensing technology is employed to 〖JP2〗monitor the structural health of the BeijingXiong′an intercity tunnel. Based on building information modeling technology,〖JP〗 intelligent and highprecision monitoring is conducted on the multiple parameters of the highspeed railway tunnel, including layered settlement, lining circumferential strain, leakage, fire, abnormal intrusion, and deformation joint deformation. A display system for the shape and position sensing management platform for the highspeed railway tunnel based on a multiparameter sensing technology is developed according to the corresponding evaluation index and early warning threshold. The system integrates data acquisition, monitoring, warning, safety assessment, and visual display, which can reflect the safety condition of the tunnel in realtime, thus ensuring a safe operation of the highspeed railway tunnel and a strong technical support for the "Jing Xiong" project.

Key words: BeijingXiong′an intercity railway tunnel, deformation monitoring, building information modeling, optical fiber sensing, multiple parameters, monitoring system