Plate bottom flexural-tensile stress monitoring system and method for existing runway surface structure

Abstract

The invention discloses a plate bottom flexural-tensile stress monitoring system and method for a existing runway surface structure. The plate bottom flexural-tensile stress monitoring system for theexisting runway surface structure comprises a plurality of fiber grating sensors installed in line light hoes and grounding strip light holes of the runway, an armored fiber, a main optical cable 4, afiber grating demodulator, a main control terminal, a deconcentrator, fiber jumpers and a temperature compensation grating sensor. The plate bottom flexural-tensile stress monitoring system and method for the existing runway surface structure uses a real plane load to act on the runway surface by means of the fiber grating sensors arranged in airway navigation light holes of an airport runway, and collects the grating refracted light wavelength at the position of the measuring point, so as to realize the measurement of the plate bottom flexural-tensile stress of the airport runway; therefore,not only the monitoring and early warning of airport runway surface damage can be realized, but also the problems such as damage to the existing runway surface and suspending air service for detection can be avoided; and the detection accuracy is high and the speed is fast, which has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of stress monitoring and pavement structure safety, and in particular relates to a system and method for monitoring bending and tension stress at the bottom of a slab used in an existing pavement structure. Background technique [0002] The runway is the most important infrastructure of the airport, which undertakes the tasks of aircraft takeoff and landing, taxiing and parking, and is the basic platform for the full play of the airport's functions. During the use of the concrete pavement of the airport runway, due to the joint action of the aircraft wheel load and environmental factors, various damage phenomena will often appear on the pavement before the end of its service life, and these damages cannot be predicted, which will bring great harm to the safety of aircraft operation. Very big threat. Therefore, it is particularly important to detect its structural performance and monitor its health. At pres...

AI Technical Summary

Problems solved by technology

However, due to the weak structural performance of the fiber grating sensor, it is easy to cause damage due to construction or assembly during the pre-embedding process, and the survival rate of the sensor cannot be guaranteed.

Moreover, for the existing pavement structure of the airport, it is very costly and extremely difficult to repair and replace the damaged sensors without affecting the normal navigation of the airport.

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