Research on Layered Settlement Monitoring System of Airport High Filling Slope Based on Fiber Grating Technology

High-filling airports have the characteristics of large terrain fluctuations, complex geological conditions, diverse materials and huge engineering volume, which tend to cause problems such as site instability, differential settlement, and instability of high slopes. It is very important to strengthen the monitoring of airport high filling engineering, and the internal settlement of the filling body is one of the main items of high filling monitoring. When the traditional layered settlement monitoring device is used to monitor the internal settlement of the high filling slope, it has disadvantages such as the difficulty of embedding measuring elements, observation during construction, and automatic monitoring. Aiming at the current problems in the monitoring of the layered settlement of the filling body, this paper developed a layered settlement monitoring system of the filling body based on the fiber grating technology, which could realize the automatic settlement monitoring of the multi-point displacement inside the filling body. The on-site application test results show that the monitoring system has reasonable structure design. The monitoring system also has the advantages of easy operation, high precision and environmental compatibility and it is suitable for layered settlement monitoring of airport high filling slope.