Track panel design method based on fiber grating array and ballastless track construction and operation method

Abstract

The application relates to a track panel design method based on a fiber grating array, which comprises the following steps: obtaining the disturbance condition of a track panel caused by a track bed slab concrete, specifically, a disturbance monitoring optical cable is arranged on the track panel, the disturbance monitoring optical cable is arranged at a position of the track panel which is suitable to be covered by the track bed slab concrete, and the disturbance monitoring optical cable is a fiber grating array stress optical cable integrated with multiple fiber grating stress sensors; when the track bed slab is poured, monitoring data of the disturbance monitoring optical cable is collected to obtain track bed slab concrete buoyancy data of the track panel; current track panel stiffness data and track bed slab concrete parameters are obtained to form a corresponding relationship among the track panel stiffness, the track bed slab concrete parameters and the track bed slab concrete buoyancy data of the track panel, and a track panel stiffness database is established according to the corresponding relationship; and according to concrete parameters of a track bed slab to be poured, appropriate track panel stiffness data are selected to design the track panel. In addition, the application relates to a fiber grating array-based ballastless track construction and operation method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rail transit engineering, and particularly relates to a track panel design method based on a fiber grating array and a ballastless track construction and operation method based on the fiber grating array. BACKGROUND

[0002] Currently, double-block ballastless tracks are mostly used in passenger-dedicated lines, and the design speed reaches 350 km / h. The safety, smoothness and comfort of high-speed trains in operation must be supported by good track geometry, and therefore, the initial design of track panels and the fine adjustment of track panels are very important for the construction and operation of ballastless tracks. In the design of track panels, track panel stiffness is one of important parameters. If the track panel stiffness is too large, the concrete of the track bed slab is prone to cracking, and if the track panel stiffness is too small, the concrete of the track bed slab is prone to forming large disturbance to the track panel and affecting the geometric shape of the track panel. However, the current track panel stiffness is basically set according to a unified standard, and cannot be adjusted and matched according to different track conditions (such as the parameters of the concrete of the track bed slab, the construction conditions on site, the environmental conditions, etc.), resulting in poor operation conditions of the ballastless track and short service life. SUMMARY

[0003] The present application relates to a track panel design method based on a fiber grating array and a ballastless track construction and operation method based on the fiber grating array, and can at least solve some defects of the prior art.

[0004] The present application relates to a track panel design method based on a fiber grating array, which comprises the following steps.

[0005] A. Obtain the disturbance of the track panel by the concrete of the track bed slab, specifically comprising the following steps.

[0006] Install a disturbance monitoring optical cable on the track panel, the disturbance monitoring optical cable is installed at a position of the track panel which is suitable to be covered by the concrete of the track bed slab, and the disturbance monitoring optical cable is a fiber grating array stress optical cable integrated with a plurality of fiber grating stress sensors;

[0007] When the concrete of the track bed slab is poured, collect the monitoring data of the disturbance monitoring optical cable to obtain the data of the buoyancy of the track panel caused by the concrete of the track bed slab;

[0008] B. Obtain the current track panel stiffness data and the parameters of the concrete of the track bed slab, form the corresponding relationship among the track panel stiffness, the parameters of the concrete of the track bed slab and the buoyancy of the track panel caused by the concrete of the track bed slab, and establish a track panel stiffness database according to the corresponding relationship;

[0009] C. Select appropriate track panel stiffness data according to the parameters of the concrete of the track bed slab to be poured, and design the track panel according to the appropriate track panel stiffness data.

[0010] Further, the above-mentioned track panel design optimization method further comprises the following steps.

[0011] D, collecting monitoring data of the disturbance monitoring optical cable to obtain sleeper stress data when a train passes by during track operation;

[0012] E, obtaining current track panel stiffness data and weight data of a running train to form a corresponding relationship among the track panel stiffness, train weight data and sleeper stress data, and supplementing the track panel stiffness database;

[0013] F, when designing a track panel, considering the track operation requirements in addition to the concrete parameters of the to-be-poured track bed plate.

[0014] The application also provides a fiber grating array-based construction and operation method of a ballastless track, comprising the following steps:

[0015] During construction of the ballastless track, the following steps are included:

[0016] S11, selecting a suitable track panel by using the above track panel design optimization method;

[0017] S12, installing the track panel system and performing coarse adjustment;

[0018] S13, performing fine adjustment on the track panel;

[0019] S14, pouring the track bed plate concrete.

[0020] Further, in S14, a disturbance monitoring optical cable is arranged on the track panel in advance, the disturbance monitoring optical cable is arranged at a position of the track panel suitable for being covered by the track bed plate concrete, the disturbance monitoring optical cable is a fiber grating array stress optical cable integrated with multiple fiber grating stress sensors; when the track bed plate is poured, monitoring data of the disturbance monitoring optical cable is collected to obtain track panel concrete buoyancy data borne by the track panel;

[0021] According to the obtained track panel concrete buoyancy data borne by the track panel, it is determined whether the track panel and the track bed plate are safe, and when it is determined that the track panel or the track bed plate is not safe, corresponding operations of work personnel are guided.

[0022] Further, in S14, the stress state in the track bed plate forming process is monitored by using the disturbance monitoring optical cable, and according to the obtained stress state in the track bed plate forming process, it is determined whether the track bed plate quality meets the requirements and corresponding maintenance operations of the track bed plate concrete by the work personnel are guided.

[0023] Further, in S14, after the track panel concrete buoyancy data borne by the track panel is obtained, the track panel stiffness database is corrected or supplemented.

[0024] Further, the above construction and operation method of the ballastless track further comprises the following steps:

[0025] When the ballastless track is in operation, the monitoring data of the disturbance monitoring optical cable is collected, whether the ballastless track is healthy is judged, if not, the track structure is maintained according to the monitoring data of the disturbance monitoring optical cable.

[0026] The present application has at least the following beneficial effects:

[0027] The present application obtains the data of the concrete buoyancy of the track panel suffered by the track panel when the track panel is poured, establishes the corresponding relationship among the track panel stiffness, the concrete parameters of the track panel and the data of the concrete buoyancy of the track panel suffered by the track panel, and selects the appropriate track panel stiffness according to the concrete parameters of the track panel and other factors when the track panel is designed, so as to avoid the concrete cracking of the track panel caused by the too large track panel stiffness and the large disturbance of the track panel caused by the too small track panel stiffness and the influence on the geometry of the track panel. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0029] Figure 1 The arrangement schematic diagram of the disturbance monitoring optical cable provided by the present application is shown. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] Embodiment one

[0032] The present application provides a track panel design method based on fiber grating array, comprising:

[0033] A, obtaining the disturbance situation of the track panel suffered by the track panel, specifically comprising:

[0034] The disturbance monitoring optical cable 100 is arranged on the track panel, the disturbance monitoring optical cable 100 is arranged at the position of the track panel which is suitable to be covered by the track panel concrete (such as Figure 1 The disturbance monitoring optical cable 100 is a fiber grating array stress optical cable integrated with a plurality of fiber grating stress sensors 101;

[0035] During the pouring of the track bed slab, the monitoring data of the disturbance monitoring optical cable 100 is collected to obtain the buoyancy data of the track bed slab concrete on the track panel;

[0036] B. Obtain the current track stiffness data and ballast concrete parameters, establish the correspondence between track stiffness, ballast concrete parameters, and ballast concrete buoyancy data on the track, and establish a track stiffness database accordingly.

[0037] C. Based on the concrete parameters of the track bed slab to be poured, select appropriate track stiffness data and design the track accordingly.

[0038] The aforementioned fiber Bragg grating array stress cable is a cable in which multiple fiber Bragg grating stress sensors 101 are integrated within a single optical cable. It is an existing product, characterized by a wide monitoring coverage (capable of covering over 10km as needed), high measurement accuracy, and small sensor unit spacing (minimum spacing can be 1cm). Its specific structure will not be elaborated here. Generally, a fiber Bragg grating data demodulator is also required. This demodulator receives the stress and strain information transmitted by the disturbance monitoring cable 100 and demodulates it into a demodulated signal for transmission to the backend processor. The fiber Bragg grating data demodulator is also an existing device; its connection to the backend processor can be electrical or communication, which is conventional technology.

[0039] Multiple disturbance monitoring optical cables 100 can be installed to collect more information. When multiple disturbance monitoring optical cables 100 are deployed at different positions on the track, the collected information is more comprehensive. Therefore, using multiple disturbance monitoring optical cables 100 can improve detection accuracy.

[0040] like Figure 1 The aforementioned disturbance monitoring optical cable 100 is laid along the longitudinal direction of the track panel. In an optional embodiment, in each disturbance monitoring optical cable 100, the number of fiber optic stress sensors 101 is the same as the number of sleepers in the track panel and they are configured in a one-to-one correspondence. The spacing between two adjacent fiber optic stress sensors 101 is the same as the spacing between sleepers.

[0041] For the installation of the disturbance monitoring optical cable 100, in one embodiment, such as Figure 1 At least part of the disturbance monitoring optical cable 100 is installed on the side wall of the track panel.

[0042] In one embodiment, at least a portion of the disturbance monitoring optical cable 100 is installed at the bottom of the track panel, that is, along the bottom of the sleeper. The bottom of the track panel directly bears the buoyancy of the track bed concrete. Therefore, installing the disturbance monitoring optical cable 100 at the bottom of the track panel can obtain more accurate and reliable buoyancy data of the track bed concrete.

[0043] In one of the embodiments, the track panel is applied to a double-block ballastless track, i.e., the track tie is a double-block track tie, each track tie including two track tie blocks, each of the track tie blocks being distributed to form two groups of track tie block rows; correspondingly, at least one of the groups of track tie block rows is provided with the disturbance monitoring optical cable 100. Obviously, the disturbance monitoring optical cable 100 is arranged on both of the groups of track tie block rows, and the monitoring effect is better. In one of the optional solutions, at least part of the disturbance monitoring optical cable 100 is arranged along the bottom of the corresponding track tie block row; in another optional solution, at least part of the disturbance monitoring optical cable 100 is arranged along the side of the corresponding track tie block row. When the disturbance monitoring optical cable 100 is arranged along the side of the corresponding track tie block row, the lateral force of the track panel exerted by the track bed slab concrete can be monitored, so as to provide a basis for judging the lateral disturbance of the track panel exerted by the track bed slab concrete.

[0044] The track panel design optimization method provided by the embodiment can obtain the track panel floating force data of the track bed slab concrete by the disturbance monitoring optical cable 100 when the track bed slab is poured, and establish a corresponding relationship among the track panel stiffness, the track bed slab concrete parameters and the track panel floating force data of the track bed slab concrete, so as to facilitate selection of a proper track panel stiffness according to the track bed slab concrete parameters and other factors during track panel design, avoid track bed slab concrete cracking caused by excessive track panel stiffness, and avoid large disturbance of the track bed slab concrete to the track panel and influence on the geometric shape of the track panel caused by insufficient track panel stiffness.

[0045] In one of the embodiments, after the track bed slab is formed, whether the track bed slab concrete is cracked, especially whether the track bed slab concrete in the contact area with the track tie is cracked, is continuously monitored, and the cracking condition of the track bed slab concrete is supplemented as one of the track panel stiffness influencing factors into the track panel stiffness database; wherein, the cracking condition of the track bed slab concrete can be rated according to the cracking severity of the track bed slab concrete, and the rating data can reflect the cracking condition of the track bed slab concrete. The track panel stiffness database reflects a corresponding relationship among the track panel stiffness, the track bed slab concrete parameters, the track panel floating force data of the track bed slab concrete and the cracking condition of the track bed slab concrete.

[0046] When the track panel stiffness is too large, the track panel can stably bear the floating force of the track bed slab concrete, and the floating force of the track bed slab concrete monitored by the disturbance monitoring optical cable 100 basically remains stable; when the track panel stiffness is too small, the track panel may be disturbed or displaced under the action of the floating force of the track bed slab concrete, and the change process can be reflected and analyzed from the change of the monitoring data of the disturbance monitoring optical cable 100. Therefore, according to the monitoring data of the disturbance monitoring optical cable 100, whether the current track panel stiffness matches the track bed slab concrete parameters can be judged; in combination with the cracking rating of the track bed slab concrete, the judgment accuracy can be further improved.

[0047] Further, the track panel design optimization method further includes:

[0048] D, collecting monitoring data of the disturbance monitoring optical cable 100 during track operation to obtain sleeper force data when a train passes;

[0049] E, obtaining current track panel stiffness data and weight data of the running train to form a corresponding relationship among the track panel stiffness, train weight data and sleeper force data, and supplementing the track panel stiffness database;

[0050] F, during the design of the track panel, in addition to the concrete parameters of the to-be-poured track bed slab, the track operation requirements are also considered.

[0051] Based on the above method, the disturbance monitoring optical cable 100 can play a role during track construction and track operation, effectively improve its utilization value, without the need to remove the disturbance monitoring optical cable 100, while not causing waste of the disturbance monitoring optical cable 100, reducing the track construction and operation cost; the disturbance monitoring optical cable 100 is used to monitor the force condition of the sleeper and the track bed slab during track operation, the data collection reliability and accuracy are high, and the monitoring accuracy and reliability can be correspondingly improved.

[0052] Considering the sleeper force condition during track operation and taking it as one of the reference conditions for the design of the track panel, the effectiveness and reliability of the track panel design can be improved, and the construction quality and operation safety of the ballastless track are ensured.

[0053] Embodiment two

[0054] The embodiment of the application provides a ballastless track construction and operation method based on a fiber grating array, which comprises the following steps:

[0055] During the construction of the ballastless track, the following steps are included:

[0056] S11, selecting a suitable track panel, which can be realized by the track panel design optimization method provided in the above embodiment one;

[0057] S12, installing the track panel system and performing coarse adjustment;

[0058] S13, performing fine adjustment on the track panel;

[0059] S14, pouring the track bed slab concrete.

[0060] Preferably, in S14, the disturbance monitoring optical cable 100 is arranged on the track panel in advance, the disturbance monitoring optical cable 100 is arranged at a position of the track panel which is suitable to be covered by the track bed slab concrete, the disturbance monitoring optical cable 100 is a fiber grating array stress optical cable integrated with a plurality of fiber grating stress sensors 101; during the pouring of the track bed slab, the monitoring data of the disturbance monitoring optical cable 100 is collected to obtain the track bed slab concrete buoyancy data borne by the track panel;

[0061] According to the obtained data of the concrete buoyancy of the track panel, it is determined whether the track panel and the track bed slab are safe, and when it is determined that the track panel or the track bed slab is not safe, the corresponding operation is guided to the maintenance personnel.

[0062] The laying of the disturbance monitoring optical cable 100 and the information acquisition mode can refer to the related content in the above embodiment one.

[0063] The determination of whether the track panel and the track bed slab are safe is mainly to determine whether the track panel will be disturbed and whether the track bed slab will be cracked or have a risk of cracking; specifically, when the monitored data of the concrete buoyancy of the track bed slab is greater than a set threshold, it is determined that the track panel and the track bed slab are not safe, and the set threshold can be obtained from the above track panel stiffness database, specifically, the appropriate matching data of the concrete buoyancy of the track bed slab is obtained according to the current track panel stiffness and the track bed slab concrete parameters.

[0064] Optionally, when the monitored data of the concrete buoyancy of the track bed slab exceeds the set threshold, the track panel elevation can be fine-tuned to release a certain concrete buoyancy, so as to ensure the safety of the track panel and the track bed slab. In addition, when the next track bed slab segment is constructed, the concrete construction parameters of the track bed slab segment can be adjusted to ensure that the concrete buoyancy of the track bed slab is within the set range.

[0065] Further, in S14, the stress state in the track bed slab forming process is monitored by the disturbance monitoring optical cable 100, and according to the obtained stress state in the track bed slab forming process, it is determined whether the quality of the track bed slab meets the requirements and the maintenance personnel is guided to perform the corresponding maintenance operation on the track bed slab concrete.

[0066] Further, in S14, after obtaining the data of the concrete buoyancy of the track bed slab on the track panel, the track panel stiffness database is corrected or supplemented, so as to continuously improve the accuracy of the track panel design and the safety of the operation of the ballastless track.

[0067] Further, the above ballastless track construction and operation method further comprises:

[0068] When the ballastless track is in operation, the monitoring data of the disturbance monitoring optical cable 100 is collected, and it is determined whether the ballastless track is healthy, and if not, the track structure is maintained according to the monitoring data of the disturbance monitoring optical cable 100. The stress condition at the stress measuring point of the track bed slab can be directly obtained through the disturbance monitoring optical cable 100, and when the stress mutation or creep occurs compared with the historical data, timely warning can be performed, so as to facilitate the further detection and maintenance of the ballastless track by the maintenance department.

[0069] It can be seen that, based on the above scheme, the disturbance monitoring optical cable 100 can be continuously used in the construction and operation process of the ballastless track, the equipment utilization rate is high, repeated installation is not required, the feedback monitoring data has continuity, the comparison of the front and rear states of the track is facilitated, and the reliability is high.

[0070] Embodiment three

[0071] The embodiment provides a track panel intelligent fine adjustment measurement method, which can be used in the above embodiment two and is used for fine adjustment operation of the track panel.

[0072] The method comprises the following steps:

[0073] In step 101, a total station is installed in the center line of the track panel, and a track panel static geometric state measuring instrument is arranged at an adjustment point of the track panel, the track panel static geometric state measuring instrument is located on the rear sight line of the total station, the track panel static geometric state measuring instrument comprises a prism, a track gauge sensor for measuring the track gauge of the track panel at the corresponding adjustment point, and a level sensor for measuring the levelness of the track panel at the corresponding adjustment point, and the center of the objective lens of the total station is at the same height as the prism of the track panel static geometric state measuring instrument.

[0074] In step 102, the prism on the track panel static geometric state measuring instrument is measured by the total station to obtain the prism coordinates, and the track gauge and the levelness of the track panel at the corresponding adjustment point are measured by the track gauge sensor and the level sensor on the track panel static geometric state measuring instrument; the prism coordinates of the track panel static geometric state measuring instrument, the track gauge and the levelness of the track panel at the corresponding adjustment point jointly constitute the measurement value of the adjustment point track panel.

[0075] In step 103, the deviations of the lateral direction, the elevation, the track gauge and the levelness of the adjustment point track panel are calculated based on the measurement value of the adjustment point track panel, the adjustment amount of the adjustment point track panel is calculated based on the deviations of the lateral direction, the elevation, the track gauge and the levelness of the adjustment point track panel, and the adjustment point track panel corresponding to the track panel static geometric state measuring instrument is adjusted by the track panel fine adjustment equipment based on the adjustment amount.

[0076] Preferably, the track panel static geometric state measuring instrument is multiple, the multiple track panel static geometric state measuring instruments are sequentially arranged on the several adjustment points on the track panel along the track panel direction, the prisms of the multiple track panel static geometric state measuring instruments are at the same height, and the multiple prisms constitute a target prism. The multiple track panel static geometric state measuring instruments are preferably sequentially connected to constitute a track panel detection device.

[0077] Preferably, for the case of multiple track panel static geometric state measuring instruments, the following steps are adopted to replace the above step 103:

[0078] Based on the measurement value of each adjustment point track panel, the deviations of the lateral direction, the elevation, the track gauge and the levelness of the adjustment point track panel corresponding to each track panel static geometric state measuring instrument are calculated.

[0079] A correlational mathematical model of track adjustment points is established. Based on the mathematical model, the adjustment amount of the target adjustment points is determined. The track fine-tuning equipment is controlled by control software to adjust the target adjustment points.

[0080] In one embodiment of the mathematical model relating track panel adjustment points, the adjustment amount δ is input at the i-th adjustment point. i Δ i0 To Δ in Let be the disturbance displacement of other adjustment points caused by the adjustment of the i-th adjustment point (which can be obtained through displacement sensors, etc.); based on the obtained disturbance displacement of each adjustment point, a training set is acquired, and a regression analysis model is established using a neural network to obtain the disturbance value of the input adjustment amount on other points; then the true adjustment amount of point i is...

[0081]

[0082] In another embodiment, a mathematical model relating the track panel adjustment points is determined by stiffness calculation. Specifically, a torque F is input at the i-th adjustment point, and the adjustment displacement Δ at that i-th adjustment point is measured. i The calculated stiffness value is

[0083]

[0084] Obtain the disturbance displacement of other adjustment points caused by the adjustment of the i-th adjustment point, and calculate the disturbance displacement Δ of each adjustment point. ij The relevant stiffness between the adjustment points can be calculated:

[0085]

[0086] The displacement change at each adjustment point can be calculated using the relevant stiffness under a fixed input torque.

[0087] Furthermore, after the current target adjustment point is adjusted, the static geometric state measuring instruments for each track panel are moved. The first track panel static geometric state measuring instrument is moved to the next adjacent adjustment point of the track panel, and the second track panel static geometric state measuring instrument is moved to the original position of the first track panel static geometric state measuring instrument. The third track panel static geometric state measuring instrument is moved to the original position of the second track panel static geometric state measuring instrument, and so on. The nth track panel static geometric state measuring instrument is moved to the original position of the (n-1)th track panel static geometric state measuring instrument. Then, the adjustment operation for the next adjustment point is carried out.

[0088] In the scheme, for a target adjustment point, instead of taking the track row state of the single adjustment point as the detection reference, a track row section where the adjustment point is located is selected as the detection reference, the rigidity characteristics of the track row are fully considered, and the adjustment amount of the target adjustment point is determined on this basis, thereby avoiding affecting the track row state of the adjacent adjustment point during the adjustment operation, and thus the track row adjustment precision can be effectively improved.

[0089] The n th track row static geometric state measuring instrument is moved to the detection position of the original n-1 th track row static geometric state measuring instrument, the n th track row static geometric state measuring instrument can perform rechecking and verification on the n-1 th adjustment point after fine adjustment, the track row fine adjustment precision and operation reliability are improved, the subsequent rechecking and verification steps are reduced, and thus the operation efficiency is improved.

[0090] Preferably, the total station has distance measuring and angle measuring functions, and the method further comprises determining the installation point of the total station, and specifically as follows:

[0091] The line basic control network CPIII network on both sides of the rear sight line of the total station is provided with eight or more prisms as the CPIII rear sight point of the total station, based on the CPIII rear sight point, the CPIII rear sight point position error and the total station center coordinate error are calculated through the rear resection adjustment calculation, based on the CPIII rear sight point position error and the total station center coordinate error, the total station center coordinate and the total station azimuth value in the line coordinate system are calculated;

[0092] Based on the total station center coordinate and the total station azimuth value in the line coordinate system, the total station center coordinate component mean error and the angle measuring mean error are calculated, if the total station center coordinate component mean error is greater than 0.7 mm or the angle measuring mean error is greater than 2'', re-stationing is performed, and the total station center coordinate component mean error and the angle measuring mean error are recalculated, until the total station center coordinate corresponding to the total station center coordinate component mean error less than 0.7 mm and the angle measuring mean error less than 2'' and the total station azimuth value are found, as the installation point of the total station, and the total station stationing operation is performed.

[0093] The above only describes the preferred embodiments of the present application and should not be used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A track design method based on fiber Bragg grating array, characterized in that, include: A. Obtain information on the disturbance of the track panel to the ballast slab concrete, specifically including: A disturbance monitoring optical cable is installed on the track panel. The disturbance monitoring optical cable is installed at a position on the track panel suitable for being covered by the concrete of the track bed slab. The disturbance monitoring optical cable is a fiber grating array stress optical cable integrating multiple fiber grating stress sensors. During the pouring of the track bed slab, the monitoring data of the disturbance monitoring optical cable is collected to obtain the buoyancy data of the track bed slab concrete on the track panel; B. Obtain the current track stiffness data and ballast concrete parameters, establish the correspondence between track stiffness, ballast concrete parameters, and ballast concrete buoyancy data on the track, and build a track stiffness database accordingly. C. Based on the concrete parameters of the track slab to be poured, select the track stiffness data and design the track accordingly.

2. The track design method based on fiber optic grating array as described in claim 1, characterized in that, Also includes: D. During track operation, collect monitoring data from the disturbance monitoring optical cable to obtain sleeper stress data when a train passes; E. Obtain the current track panel stiffness data and the weight data of the running train, establish the correspondence between track panel stiffness, train weight data and sleeper stress data, and supplement it into the track panel stiffness database. F. When designing the track panel, in addition to the concrete parameters of the track bed slab to be poured, the track operation requirements should also be considered.

3. A method for construction and operation of ballastless track based on fiber optic grating array, characterized in that, include: The construction of ballastless track includes the following steps: S11, Select the track layout according to the track layout design method based on fiber optic grating array as described in claim 1 or 2; S12, Install the track panel system and perform rough adjustments; S13, fine-tuning of the track panel; S14, pour concrete for the track bed slab.

4. The ballastless track construction and operation method as described in claim 3, characterized in that, In S14, a disturbance monitoring optical cable is pre-installed on the track panel. The disturbance monitoring optical cable is installed at a position on the track panel suitable for being covered by the track slab concrete. The disturbance monitoring optical cable is a fiber grating array stress optical cable integrating multiple fiber grating stress sensors. During the pouring of the track slab, the monitoring data of the disturbance monitoring optical cable is collected to obtain the buoyancy data of the track slab concrete on the track panel. Based on the obtained data on the buoyancy of the track panel and the ballast concrete, determine whether the track panel and the ballast slab are safe. If it is determined that the track panel or the ballast slab is unsafe, guide the engineering personnel to perform the corresponding operations.

5. The ballastless track construction and operation method as described in claim 4, characterized in that, In S14, the stress state of the track bed slab during the forming process is monitored by the disturbance monitoring optical cable. Based on the obtained stress state during the forming process, it is determined whether the quality of the track bed slab meets the requirements and the maintenance personnel are guided to carry out corresponding maintenance operations on the track bed slab concrete.

6. The ballastless track construction and operation method as described in claim 4, characterized in that, In S14, after obtaining the buoyancy data of the track bed concrete on the track panel, the track panel stiffness database is corrected or supplemented.

7. The ballastless track construction and operation method as described in claim 4, characterized in that, Also includes: During the operation of the ballastless track, the monitoring data of the disturbance monitoring optical cable is collected to determine whether the ballastless track is healthy. If not, the track structure is maintained according to the monitoring data of the disturbance monitoring optical cable.

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