Safety Monitoring Information System of Urban Subway

The monitoring of safety in construction for urban subway is an important procedure of guaranteeing construction safety and engineering quality. Deformation of the buildings around the subway route, settlement of the road and pipelines, displacement of soil mass, convergence and vault sink of the tunnel etc. should be monitored during the subway construction. Prompt computation, analysis and information feedback to monitoring data are necessary. The monitoring data processing and analysis involve a large amount of mathematical calculation, drawing, geography location and tabulation. The paper describes a monitoring and analysis information system to deal with, analyses the data of construction monitoring and provide information feedback in time for the safety in urban subway construction. The application of this system to the urban subway construction in Beijing, China shows that it can high-accuracy monitor the deformation of subway tunnel, manage and analyze monitoring data, provide the location and status of construction monitoring points. The monitoring and analysis information system supports strong technological support on the safety construction of subway.