The Study Of Monitoring System For Tunnel Constraction Safety Based On WebGIS

At present. Chinese railway construction is entering a period of rapid development, and speed railway tunnel needs high technical standards.In order to ensure stability and security of railway tunnel structure, we need dynamic observation for tunnels under the project and the surrounding buildings' safety. Traditional monitoring methods have a long period and massive data. To solve the traditional data processing problem, research and development tunnel construction safety monitoring system, which have great significance for ensuring the tunnel construction safety and enhance tunnel operation benefit.Based on the above considerations, the thesis introduces the concept of the WebGIS into the railway tunnel monitoring information management, information visualization, and implement the monitoring and network management. The main contents as follows:(1) The thesis firstly introduces the monitoring of project survey, monitoring object and benchmarks for monitoring, analyzing business processes of the system and design the function module. In addition, compared to the current mainstream development WebGIS platform's performance. Thesis analysis tunnel construction safety monitoring system functional requirement, system goals, and established the system function model.(2) The thesis secondly introduced the system design principles and design objective, according to the requirement, design the overall structural,system function module,relative database, and design JSON data format conversion methods and vector map-making technology solutions.(3) The tunnel construction safety monitoring system, implement map basic operations and manager monitoring data, including data storage, query, modify, deleting. System implement monitoring points layout and monitoring information displayed.When monitoring data import database.the system according to setting the alarm and warning value automatically calculate the alarm and warning of the point, and display significant color to representive the monitoring point state.In order to directly reflect monitoring point state,the system provides appropriate monitoring curve painting function,allowing users to understand the dynamic monitoring of the deformation of the object and settlement levels.