Research on railway slope displacement monitoring method based on satellite positioning

Based on the Satellite Positioning satellite navigation system, this paper uses the Satellite Positioning high-precision GNSS monitor to monitor the surface displacement and deformation of a tunnel slope. The monitoring data are transmitted back to the monitoring platform in real time through the transmission module, and the monitoring data are processed and analyzed. The whole process of automatic monitoring is realized, and the unstable sliding and flood disasters of the mountain body are predicted, so that the treatment and reinforcement measures can be taken as soon as possible. The purpose of ensuring the safety of tunnel operation is achieved. The field monitoring results show that: (1) The Satellite Positioning surface displacement monitoring system has high positioning accuracy. The plane accuracy is better than ±2.5 mm, and the vertical accuracy is better than ±5.0 mm. The shortest location update time is less than 1 s, and the success rate of one time location is better than 95%. (2) The receiving equipment in the Satellite Positioning surface displacement monitoring system can form the Internet of Things. The wireless network and the monitoring center server are used to realize information transmission. (3) After setting a reasonable instantaneous early warning value and an accumulated early warning value through expert evaluation, If the monitoring data value triggers the instantaneous early warning value or the cumulative early warning value, the system will automatically alarm, so as to ensure the safety of driving. (4) Through the analysis of monitoring data, the horizontal displacement value is within 10 mm, and the vertical displacement value is within 50 mm. The data is relatively stable and there is no landslide risk.