Mechanical characteristic monitoring device for substructure of G-series high-speed train as well as application method and production method thereof

Abstract

A mechanical characteristic monitoring device for a substructure of a G-series high-speed train comprises micro FBG soil pressure sensors, a monitoring device and a vehicle; each micro FBG soil pressure sensor comprises a hollow cylindrical sleeve, an upper circular diaphragm and a lower circular diaphragm are sealed and pasted on the upper end surface and the lower end surface of each sleeve respectively and seal the inner cavity of the corresponding sleeve, a gate region of an FBG is bonded at the circle center of the lower surface of each upper circular diaphragm, the gate region of each FBG is connected with an optical fiber, and each optical fiber passes through the wall surface of the corresponding sleeve; the vehicle comprises a strip-shaped body, the front end of the body is sharp,the cross section of the body is a square, and multiple grooves used for placing the micro FBG soil pressure sensors are reserved in the body; and the monitoring device comprises an interrogator anddata acquisition and storage equipment, the input terminal of the interrogator is connected with each micro FBG soil pressure sensor by virtue of the corresponding optical fiber, and the output terminal of the interrogator is connected with the data acquisition and storage equipment. The invention also comprises a production method of the micro FBG soil pressure sensors of the mechanical characteristic monitoring device for the substructure of the G-series high-speed train and a test method for monitoring mechanical characteristics of the substructure of the G-series high-speed train.

Description

technical field [0001] The invention relates to a monitoring device for the force characteristic of a high-speed railway foundation, and a method for using the same and a manufacturing method thereof. Background technique [0002] During the operation of high-speed rail trains, there will be phenomena of uneven subsidence of the high-speed rail foundation and irregularity of the high-speed rail track. The reasons for the uneven subsidence of the high-speed railway foundation and the irregularity of the high-speed railway track can be expressed as follows: [0003] During the operation of the high-speed rail train, the reciprocating dynamic load of the axle is applied to the track, and the dynamic load is finally transmitted to the roadbed along the rail, fastener system, track slab and concrete floor. Under the action of the dynamic load, the high-speed railway subgrade soil produces internal stress and relative sliding between soil particles, which leads to uneven subsiden...

AI Technical Summary

Problems solved by technology

[0010] At present, the experimental scheme for monitoring the mechanical characteristics of the high-speed railway foundation mainly adopts the method of embedding the resistive earth pressure sensor in the indoor high-speed railway foundation model, and simulating the dynamic load of the high-speed railway through the actuator to obtain the monitoring points of the high-speed railway foundation model. However, there are disadvantages such as cumbersome calibration process, susceptibility to electromagnetic radiation, and high requirements on the surrounding environment. There are few devices that can be truly applied to the monitoring of the force characteristics of high-speed railway foundations.

At present, the monitoring device for the mechanical characteristics of the high-speed railway foundation can only be applied to the high-speed railway foundation model and cannot be applied to the actual high-speed railway foundation monitoring.

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