Rail tunnel vault settlement dynamic monitoring device and method

Abstract

A kind of rail tunnel vault settlement dynamic monitoring device, including at least one monitoring tag, the monitoring tag is arranged at the monitoring point of tunnel vault;Intelligent inspection vehicle, it includes inspection vehicle body, the inspection vehicle body is along rail inspection, and the settlement monitoring terminal that can perceive monitoring tag, positioning monitoring point, complete ranging, according to the settlement of current monitoring point condition calculated from ranging result is arranged on the inspection vehicle body.The monitoring device of the present application can reduce monitoring cost, improve monitoring efficiency and accuracy;Intelligent inspection vehicle is along rail inspection, can realize dynamic monitoring, its speed is fast, can improve monitoring efficiency, its vibration is small, can guarantee ranging accuracy.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rail tunnel settlement monitoring, and particularly relates to a rail tunnel vault settlement dynamic monitoring device and method. BACKGROUND

[0002] In recent years, the construction of rail tunnels in China has developed rapidly. According to statistics, by the end of 2020, the number of rail tunnels in operation in China had exceeded 16,000, with a total length of over 19,000 kilometers; the number of cities with opened urban rail transit had reached 40, with over 200 operating lines and a total operating mileage of nearly 70,000 kilometers.

[0003] Due to its own characteristics, rail tunnels may be affected by various factors such as geology, topography, climate, etc. during construction and operation, resulting in cracks, water seepage, settlement and many other problems. Therefore, monitoring tunnels under construction and in operation to timely and efficiently find problems in the main structure of the tunnel is one of the important means to ensure traffic safety and avoid major accidents.

[0004] Rail tunnel settlement monitoring is the main task of tunnel main structure monitoring. Currently, rail tunnel settlement monitoring is mainly achieved by manual time and point distance measurement using high-precision total stations for detection, or by deploying automatic monitoring stations inside the tunnel. The manual distance measurement or use of total stations is time-consuming and labor-intensive, and only supports static monitoring, while the deployment of monitoring stations is costly. SUMMARY

[0005] The present application provides a rail tunnel vault settlement dynamic monitoring device and method to address the deficiencies of the prior art, which can reduce monitoring costs and improve monitoring efficiency and accuracy. The specific technical solutions are as follows:

[0006] A rail tunnel vault settlement dynamic monitoring device, the device comprising:

[0007] At least one monitoring tag, the monitoring tag being arranged at a monitoring point of the tunnel vault;

[0008] An intelligent inspection vehicle, comprising an inspection vehicle body that inspects along the rail, and a settlement monitoring terminal arranged on the inspection vehicle body and capable of sensing the monitoring tag, locating the monitoring point, completing distance measurement, and calculating the current monitoring point settlement based on the distance measurement result.

[0009] Further, the settlement monitoring terminal comprises a distance measurement module, a positioning module, and a main control system;

[0010] The distance measurement module is used to complete sensing and distance measurement of the monitoring tag; the positioning module is used to determine the position of the current monitoring point; and the main control system is used to control the distance measurement module and the positioning module to complete collection and processing of relevant data.

[0011] A rail tunnel vault settlement dynamic monitoring method, the method comprises the following steps:

[0012] Step S1, place a monitoring tag at the monitoring point, and the intelligent inspection vehicle inspects along the rail;

[0013] Step S2, the intelligent inspection vehicle senses the monitoring tag, when the monitoring tag is sensed, the ranging module and the positioning module are started, and the ranging of the monitoring tag and the positioning of the monitoring point are completed;

[0014] Step S3, according to the position information of the monitoring point, the ranging result and the previous ranging result of the monitoring point are compared and operated, and the settlement of the current monitoring point is obtained.

[0015] Further, the sensing and ranging process of the monitoring tag in step S2 comprises the following steps:

[0016] Step S2R1, the ranging module is composed of a light source, a light detector and a laser range finder, and the light source emits laser to the tunnel vault;

[0017] Step S2R2, when the laser hits the monitoring tag, the reflected light changes;

[0018] Step S2R3, when the light detector detects the specific change of the reflected light, the laser range finder is started, and the ranging is completed.

[0019] Further, the ranging result comparison operation process in step S3 comprises:

[0020] S31, when only one monitoring tag is placed at the monitoring point, the ranging result of the monitoring tag and the previous ranging result are operated, and the settlement of the current monitoring point is obtained;

[0021] S32, when multiple monitoring tags are placed at the monitoring point, the ranging results of part or all of the monitoring tags and the previous ranging results of the corresponding monitoring tags are operated, and the settlement of the current monitoring point is obtained.

[0022] Further, in step S2R2, a reflective sticker is used as the monitoring tag, and after the laser hits the reflective sticker, the reflected light intensity will increase to a certain range, which can be used as the basis for whether the laser hits the monitoring tag.

[0023] Further, in step S1, the monitoring tag is arranged at the top of the tunnel vault, and multiple monitoring tags are arranged axially at intervals at one monitoring point.

[0024] Further, in step S2, all monitoring tags of the same monitoring point are ranged, and when the first monitoring tag of the monitoring point is encountered, the positioning of the monitoring point is completed.

[0025] Further, the positioning process of the monitoring point in the step S2 is completed by using the radio frequency identification technology, and specifically includes the following steps.

[0026] S2L1, the positioning module is composed of a radio frequency reader and an antenna, and a radio frequency tag is placed at each monitoring point, and the radio frequency tag records the current monitoring point information;

[0027] S2L2, when the ranging module encounters the first monitoring tag of the monitoring point, the radio frequency reader and the antenna read the information stored in the radio frequency tag;

[0028] S2L3, the current monitoring point position is determined according to the read information, and if the radio frequency tag information of other monitoring points is read, the current monitoring point position is determined according to the read signal strength.

[0029] Further, a height fixing pile is vertically arranged along the outside line of the rail at each monitoring point of the tunnel vault, and a height fixing tag is hung on the height fixing pile, and the rail settlement value can be obtained by measuring the height fixing tag by the settlement monitoring terminal and comparing it with the previous measurement result; and then the tunnel vault ranging result obtained in the step S3 is subtracted by the rail settlement value as the actual tunnel vault ranging result of the current monitoring point.

[0030] The beneficial effects of the present application are:

[0031] 1. The monitoring device of the present application can reduce the monitoring cost, improve the monitoring efficiency and accuracy; the intelligent inspection vehicle inspects along the rail, can realize dynamic monitoring, has high speed, can improve the monitoring efficiency, has small vibration, and can ensure the ranging accuracy;

[0032] 2. The present application can automatically sense the monitoring point, complete the ranging and positioning of the monitoring point, and comprehensively judge the settlement of the monitoring point combined with the previous ranging result, and the monitoring process is automatically completed without manual intervention, which saves time and effort. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The structure schematic diagram of the rail tunnel vault settlement dynamic monitoring device of the present application is shown;

[0034] Figure 2 The structure block diagram of the settlement monitoring terminal in the present application is shown;

[0035] Figure 3 The flow block diagram of the rail tunnel vault settlement dynamic monitoring method of the present application is shown;

[0036] Figure 4 The structure schematic diagram of the height fixing pile and the height fixing tag arranged on the outside of the rail in the present application is shown.

[0037] As shown in the figure: 1, intelligent inspection vehicle; 11, inspection vehicle body; 12, settlement monitoring terminal; 2, rail; 3, tunnel vault; 4, monitoring tag; 5, radio frequency tag; 6, fixed height pile; 7, fixed height tag. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0039] As shown in the figure: 1, intelligent inspection vehicle; 11, inspection vehicle body; 12, settlement monitoring terminal; 2, rail; 3, tunnel vault; 4, monitoring tag; 5, radio frequency tag; 6, fixed height pile; 7, fixed height tag. Figure 1 The device comprises:

[0040] At least one monitoring tag 4 is arranged at the monitoring point of the tunnel vault 3;

[0041] The intelligent inspection vehicle 1 comprises an inspection vehicle body 11 which inspects along the rail 2, and a settlement monitoring terminal 12 is arranged on the inspection vehicle body 11 to sense the monitoring tag 4, locate the monitoring point, complete the ranging, and calculate the settlement condition of the current monitoring point according to the ranging result.

[0042] By adopting the above technical solution, the monitoring device can reduce the monitoring cost and improve the monitoring efficiency and accuracy; the intelligent inspection vehicle 1 inspects along the rail 2, can realize dynamic monitoring, has high speed, can improve the monitoring efficiency, has small vibration, and can ensure the ranging accuracy.

[0043] As shown in the figure: 1, intelligent inspection vehicle; 11, inspection vehicle body; 12, settlement monitoring terminal; 2, rail; 3, tunnel vault; 4, monitoring tag; 5, radio frequency tag; 6, fixed height pile; 7, fixed height tag. Figure 2 The settlement monitoring terminal 12 comprises a ranging module, a positioning module and a main control system;

[0044] The ranging module is used to complete the sensing and ranging of the monitoring tag 4; the positioning module is used to determine the position of the current monitoring point; and the main control system is used to control the ranging module and the positioning module to complete the collection and processing of related data.

[0045] By adopting the above technical solution, one or more main control systems can be used to complete the automatic positioning and ranging functions.

[0046] As shown in the figure: 1, intelligent inspection vehicle; 11, inspection vehicle body; 12, settlement monitoring terminal; 2, rail; 3, tunnel vault; 4, monitoring tag; 5, radio frequency tag; 6, fixed height pile; 7, fixed height tag. Figure 3 A dynamic monitoring method for the settlement of the tunnel vault of the rail, characterized in that the method comprises the following steps:

[0047] Step S1, arranging the monitoring tag 4 at the monitoring point, and the intelligent inspection vehicle 1 inspects along the rail 2;

[0048] Step S2, the intelligent inspection vehicle 1 senses the monitoring tag 4, when sensing the monitoring tag 4, starts the ranging module and the positioning module, and completes the ranging of the monitoring tag 4 and the positioning of the monitoring point;

[0049] Step S3, according to the position information of the monitoring point, the ranging result is compared and operated with the previous ranging result of the monitoring point, and the current monitoring point settlement condition is obtained.

[0050] Through the above technical scheme, the intelligent inspection vehicle 1 can automatically sense the monitoring point, complete the ranging and positioning of the monitoring point, and comprehensively judge the settlement condition of the monitoring point combined with the previous ranging result. The monitoring process is automatically completed without manual intervention, saving time and effort.

[0051] After detecting the monitoring tag 4, positioning can be performed first and then ranging, or real-time positioning can be performed during the inspection process.

[0052] The actual measurement results show that using a high-precision laser range finder, millimeter-level ranging accuracy can be achieved; in addition, by placing monitoring tags 4 at different positions of the tunnel vault 3 and using multiple ranging modules, detection of changes in the tunnel structure can be achieved.

[0053] As shown in Figure 2 , the sensing and ranging process of the monitoring tag 4 in step S2 includes the following steps:

[0054] Step S2R1, the ranging module is composed of a light source, a light detector, and a laser range finder; the light source emits laser light to the tunnel vault 3;

[0055] Step S2R2, when the above laser light hits the monitoring tag 4, the reflected light undergoes a specific change;

[0056] Step S2R3, when the light detector detects this specific change of the reflected light, the laser range finder is started, and the ranging is completed.

[0057] Through the above technical scheme, the light detector can use one or several changes in various properties such as wavelength and polarization of the reflected light as the basis for starting the laser range finder.

[0058] As shown in Figures 1 to 3 , the ranging result comparison and operation process in step S3 includes:

[0059] S31, when only one monitoring tag 4 is placed at the monitoring point, the ranging result of the monitoring tag 4 is operated with the previous ranging result to obtain the settlement condition of the current monitoring point;

[0060] S32, when multiple monitoring tags 4 are placed at the monitoring point, the ranging results of some or all of the monitoring tags 4 are operated with the previous ranging results of the corresponding monitoring tags 4 to obtain the settlement condition of the current monitoring point.

[0061] By adopting the above technical scheme, during the operation of the intelligent inspection vehicle 1, the vehicle may shake, and factors such as ranging module error may affect the measurement accuracy. The mean value of the multiple monitoring labels 4 at the monitoring point can eliminate part of the error.

[0062] As shown in Figure 1 , in step S2R2, the reflective sticker is used as the monitoring label 4. After the laser hits the reflective sticker, the reflected light intensity will increase to a certain range. The light intensity reaching a certain range can be used as a basis for determining whether the laser hits the monitoring label 4.

[0063] By adopting the above technical scheme, if the black tape is used as the monitoring label 4, the light intensity will be weakened, and the line may be easily laid in the tunnel, which may be mistaken for a monitoring label 4. However, if the reflective sticker is used as the monitoring label 4, the light intensity will be enhanced, which makes it easier to determine whether the laser hits the monitoring label 4.

[0064] As shown in Figure 1 , in step S1, the monitoring label 4 is arranged at the top of the tunnel vault 3, and multiple monitoring labels 4 are arranged axially at intervals at a monitoring point.

[0065] By adopting the above technical scheme, the monitoring label 4 is arranged at the top of the tunnel vault 3, and multiple monitoring labels 4 are arranged, which can effectively ensure the ranging accuracy of the laser range finder and reduce errors.

[0066] As shown in Figure 1 , in step S2, the ranging of all monitoring labels 4 at the same monitoring point is performed. When the first monitoring label 4 at the monitoring point is encountered, the positioning of the monitoring point is completed.

[0067] By adopting the above technical scheme, one of the multiple monitoring labels 4 can be positioned first, and then the ranging of the subsequent monitoring labels 4 is completed in sequence as the intelligent inspection vehicle 1 moves, which can make the ranging result more accurate.

[0068] As shown in Figure 1 , in step S2, the positioning process of the monitoring point is completed using radio frequency identification technology, which specifically includes the following steps:

[0069] S2L1, the positioning module is composed of a radio frequency reader and an antenna. A radio frequency tag 5 is placed at each monitoring point, and the radio frequency tag 5 records the information of the current monitoring point;

[0070] S2L2, when the ranging module encounters the first monitoring label 4 at the monitoring point, the radio frequency reader and the antenna read the information stored in the radio frequency tag 5;

[0071] S2L3, determining the current monitoring point position according to the read information, if the information of other monitoring point radio frequency tags 5 is read, then determining the current monitoring point position according to the read signal strength.

[0072] By adopting the technical scheme, the positioning of the first monitoring tag 4 is completed by using the radio frequency identification technology (English full name: Radio Frequency Identification, for short: RFID), and the positioning is relatively simple and convenient; and only one radio frequency tag 5 needs to be pasted, so that the position of the current intelligent inspection vehicle 1 can be accurately judged, and the positioning is more accurate and convenient compared with the vehicle-mounted odometer.

[0073] As shown in the drawings, Figure 4 The height fixing pile 6 is vertically arranged along the outer side line of the rail 2 at each monitoring point of the tunnel vault 3, and the height fixing tag 7 is suspended on the height fixing pile 6. The rail settlement value can be obtained by measuring the height fixing tag 7 by the settlement monitoring terminal 12 and comparing with the previous measurement result; and then the tunnel vault 3 ranging result obtained in step S3 is subtracted by the rail settlement value as the actual tunnel vault ranging result of the current monitoring point.

[0074] By adopting the technical scheme, in the running process of the intelligent inspection vehicle 1, the vehicle may shake, and factors such as ranging module error may affect the measurement accuracy. These problems have been eliminated by pasting monitoring tags 4 at the monitoring point to take the average value. In addition to the above factors, the rail 2 and the roadbed may also settle after a period of operation. The settlement of the rail 2 will cause the tunnel vault measurement result error. The tunnel vault 3 ranging result is subtracted by the rail settlement value as the actual vault ranging result, so that the influence of the rail settlement can be eliminated.

[0075] In the implementation of the present application,

[0076] As shown in the drawings, Figure 1 Four monitoring tags 4 and one radio frequency tag 5 can be pasted at the same monitoring point.

[0077] 1. When the laser of the settlement monitoring terminal hits the first monitoring tag 4, the ranging module is started to complete the ranging of the first monitoring tag 4, and the positioning module is started to determine the monitoring point according to the information of the radio frequency tag 5.

[0078] 2. With the movement of the intelligent inspection vehicle 1, the ranging of the subsequent three monitoring tags 4 is sequentially completed.

[0079] 3. The ranging results of the four monitoring tags 4 are averaged as the ranging result of the current monitoring point.

[0080] When the system is deployed for the first time, the ranging process is completed, and the first ranging result is stored as an initial value. According to standards such as the Railway Tunnel Monitoring Measurement Technical Specification Q / CR9218-2015, the measurement frequency and early warning conditions are different under different tunnels and geological conditions. Generally, two indexes, daily settlement and cumulative settlement, need to be calculated. The subsequent measurement results can be compared with the previous measurement results to calculate the daily settlement and cumulative settlement, and early warning is performed when the settlement reaches the relevant standard early warning value.

[0081] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for dynamic monitoring of subsidence of a rail tunnel vault, characterized in that, The device comprises: at least one monitoring tag (4) arranged at a monitoring point of a tunnel vault (3); an intelligent inspection vehicle (1) comprising an inspection vehicle body (11) that inspects along a rail (2), and a settlement monitoring terminal (12) arranged on the inspection vehicle body (11) and capable of sensing the monitoring tag (4), locating the monitoring point, completing distance measurement, and calculating the settlement of the current monitoring point according to the distance measurement result; a dynamic monitoring method for rail tunnel vault settlement by using the above device, the method comprising the following steps: Step S1: placing a monitoring tag (4) at a monitoring point, and an intelligent inspection vehicle (1) inspects along a rail (2); Step S2: the intelligent inspection vehicle (1) senses the monitoring tag (4), and when the monitoring tag (4) is sensed, a distance measurement module and a positioning module are started to complete distance measurement of the monitoring tag (4) and positioning of the monitoring point; Step S3: according to the position information of the monitoring point, the distance measurement result is compared with the previous distance measurement result of the monitoring point to obtain the settlement of the current monitoring point; In the step S1, the monitoring tag (4) is arranged at the top of the tunnel vault (3), and multiple monitoring tags (4) are arranged at an axial interval at each monitoring point; At each monitoring point of the tunnel vault (3), a fixed-height pile (6) is vertically arranged along the outer side line of the rail (2), and a fixed-height tag (7) is hung on the fixed-height pile (6), and the rail settlement value can be obtained by measuring the fixed-height tag (7) by the settlement monitoring terminal (12) and comparing it with the previous measurement result; and then the distance measurement result of the tunnel vault (3) obtained in step S3 is subtracted by the rail settlement value as the actual tunnel vault distance measurement result of the current monitoring point.

2. The rail tunnel arch subsidence dynamic monitoring device according to claim 1, characterized in that: The settlement monitoring terminal (12) comprises a distance measurement module, a positioning module, and a main control system; The distance measurement module is used to complete sensing and distance measurement of the monitoring tag (4); the positioning module is used to determine the position of the current monitoring point; and the main control system is used to control the distance measurement module and the positioning module to complete collection and processing of relevant data.

3. A method of monitoring settlement of a rail tunnel vault according to claim 1, wherein The sensing and distance measurement process of the monitoring tag (4) in the step S2 comprises the following steps: Step S2R1: the distance measurement module is composed of a light source, a light detector, and a laser distance meter, and the light source emits laser to the tunnel vault (3); Step S2R2: when the laser hits the monitoring tag (4), the reflected light changes in a specific way; Step S2R3: when the light detector detects this specific change of the reflected light, the laser distance meter is started to complete distance measurement.

4. The method of claim 1, wherein the method further comprises: The distance measurement result comparison and operation process in the step S3 comprises: S31: when only one monitoring tag (4) is placed at the monitoring point, the distance measurement result of the monitoring tag (4) is compared with the previous distance measurement result to obtain the settlement of the current monitoring point; S32: when multiple monitoring tags (4) are placed at the monitoring point, the distance measurement results of some or all of the monitoring tags (4) are compared with the previous distance measurement results of the corresponding monitoring tags (4) to obtain the settlement of the current monitoring point.

5. The method of claim 3, wherein the method further comprises: In the step S2R2, the reflective sticker is used as the monitoring label (4), and after the laser hits the reflective sticker, the reflected light intensity will increase to a certain range. The light intensity reaching the certain range can be used as the basis for determining whether the laser hits the monitoring label (4) or not.

6. A method of monitoring the settlement of a rail tunnel vault according to claim 1, characterised in that: In the step S2, the ranging is performed on all the monitoring labels (4) of the same monitoring point, and when the first monitoring label (4) of the monitoring point is encountered, the positioning of the monitoring point is completed.

7. A method of monitoring settlement of a rail tunnel vault dynamically as claimed in claim 6, wherein In the step S2, the positioning process of the monitoring point is completed by using the radio frequency identification technology, and specifically includes the following steps: S2L1, the positioning module is composed of a radio frequency reader and an antenna, and a radio frequency label (5) is placed at each monitoring point, and the radio frequency label (5) records the information of the current monitoring point; S2L2, when the ranging module encounters the first monitoring label (4) of the monitoring point, the radio frequency reader and the antenna read the information stored in the radio frequency label (5); S2L3, the position of the current monitoring point is determined according to the read information, and if the information of the radio frequency label (5) of other monitoring points is read, the position of the current monitoring point is determined according to the read signal strength.

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