CN104504769A - Electronic disease collection system for rail transit bridge and tunnel structure and collection and analysis method - Google Patents

Abstract

The invention discloses an electronic disease collection system for a rail transit bridge and tunnel structure. In the rail transit bridge and tunnel structure, each check point is provided with an electronic tag. The system further comprises a portable computer, an electronic tag scanner connected with the portable computer, and a computer terminal; the check points are partially provided with sensors and data acquisition modules matched with the sensors; the portable computer comprises an input unit used for inputting check information, and an evaluation unit used for determining the safety level of each check point based on the check information and determining the check cycle of each check point. The electronic disease collection system not only can perform quantitative evaluation and early warming and feedback in real time for diseases of the rail transit bridge and tunnel structure, but also can standardize a check workflow, so as to enable a worker to be out of original paper type check work, ensure the arrival rate of a worker, ensure data reality and reliability, improve working enthusiasm and working quality of the worker, and avoid wrong checks and missing checks.

Description

Electronic defect collecting system and collecting and analyzing method for rail transit bridge tunnel structure

Technical Field

The invention relates to a technology for maintaining a track traffic bridge tunnel structure, in particular to a system for acquiring electronic diseases of the track traffic bridge tunnel structure and an acquisition and analysis method thereof.

Background

As a defense structure for urban vehicle traffic, a rail transit bridge tunnel is usually in a severe environment, and is inevitably affected by various factors during an operation period, so that the durability, reliability and safety of the structure are continuously reduced. The rail transit bridge tunnel has long inner distance, complex penetrating geology and relatively closed inner space of the tunnel structure, so that maintenance work is even inconvenient to carry out in the operation period.

At present, the maintenance work of the rail transit bridge tunnel in China is still based on manual inspection of a paper table format, namely, management personnel inspect the appearance condition of the structure on site according to a set detection evaluation table, the inspection mode is time-consuming, labor-consuming, poor in data accuracy, not high in personnel enthusiasm, prone to error detection and missing detection, low in personnel arrival rate, and incapable of quantitatively detecting key stress parameters of the rail transit bridge tunnel structure, so that the emergency accident occurring in the rail transit bridge tunnel cannot be early warned; moreover, when the structural state is automatically monitored by the sensor, the state information outside the monitoring area of the sensor cannot be well predicted, so that great life and property losses are easily caused.

Disclosure of Invention

The invention aims to provide an electronic disease acquisition system for a track traffic bridge tunnel structure, which can standardize maintenance and inspection work, ensure the maintenance work quality of the track traffic bridge tunnel structure and improve the work efficiency.

In order to realize the purpose, the technical scheme of the invention is as follows: an electronic disease acquisition system of a rail transit bridge tunnel structure is characterized in that each check point in the rail transit bridge tunnel structure is provided with an electronic tag, in addition, the system also comprises a portable computer, an electronic tag scanner connected with the portable computer and a computer terminal connected with the portable computer, sensors and data acquisition modules matched with the sensors are arranged at partial check points, the portable computer is communicated with the data acquisition modules in a wireless mode, and the portable computer comprises an input unit used for inputting inspection information; and the evaluation unit determines the security level of each check point according to the check information and determines the check period of each check point according to the security level.

The invention also aims to provide a collection and analysis method of the rail transit bridge tunnel structure electronic disease collection system, which is based on the electronic disease collection device, so that maintenance and inspection work can be standardized, the maintenance work quality of the rail transit bridge tunnel structure is ensured, and the work efficiency is improved.

In order to realize the purpose, the technical scheme of the invention is as follows: a collection and analysis method of an electronic defect collection device of a rail transit bridge tunnel structure is characterized by comprising the following steps of: A. the computer terminal finishes the inspection work planning, determines the work content, the inspection point position and the corresponding staff of each inspection task, sends the inspection planning content to each portable computer, and the staff holds the portable computer to carry out data acquisition on site; B. the method comprises the steps that a worker examines check points in a rail transit bridge tunnel structure in sequence according to an examination planning route in a portable computer, scans an electronic tag through an electronic tag scanner and feeds back information to the portable computer, the portable computer calls examination content required by the check points according to the information in the electronic tag, the worker examines and judges, after the worker finishes the examination information, a corresponding examination result is recorded into the portable computer and written into the electronic tag through the scanner for storage, when a sensor is arranged at the check point, the worker wirelessly collects monitoring parameters from a data collection module matched with the sensor into the portable computer, writes field examination information into the data collection module and finishes examination work at the check point; C. and the evaluation unit of the portable computer determines the safety level of each check point according to the check result and the monitoring parameters, and determines the check period of each check point according to the safety level.

Step C, determining the safety level of the check point according to the monitoring parameters, and comprising the following steps of a, establishing a hierarchical division index system of each component and member of the structure; b. scoring the relative importance of each layer of indexes, and establishing a fuzzy judgment matrix of the layer; c. verifying the consistency of the fuzzy judgment matrix; d. calculating the weight of each layer of index; e. determining a membership function, taking the ratio of the disease index measured value to a limit value specified by a specification as a calculation element of a fuzzy function, and judging the fuzzy grade of each index by adopting a trapezoidal fuzzy function; f. and fuzzy evaluation, namely calculating the fuzzy grade of the index according to the membership function of each index, obtaining the evaluation result of the layer through weighted averaging corresponding to the index of the layer, further obtaining the evaluation result of the layer through weighted averaging of the result and the corresponding weight of the layer, and finally finishing the state evaluation of the whole structure layer by layer upwards to obtain the safety grade of each check point.

The invention is based on electronic equipment, realizes the full electronization of the rail transit bridge tunnel structure inspection work, standardizes the rail transit bridge tunnel structure inspection work, ensures the arrival rate and the work quality of workers, improves the efficiency and the enthusiasm, and completes the quantitative acquisition of parameters while qualitatively inspecting the structure, so the inspection technology provides a new way for the rail transit bridge tunnel structure maintenance work.

Drawings

Fig. 1 is a schematic view of the tunnel structure of the electronic disease collection device supported by the invention.

FIG. 2 is a schematic view of the bridge structure of the electronic disease collection device supported by the present invention.

Fig. 3 is a schematic structural diagram of a data acquisition module according to the present invention.

Fig. 4 is a schematic diagram of evaluation index hierarchical division.

FIG. 5 is a schematic diagram of the subclass hierarchical division of the upper structure of the concrete simply supported girder bridge.

FIG. 6 is a schematic diagram of the subclass hierarchical division of the concrete simple-supported girder bridge substructure.

Fig. 7 is a schematic diagram of the sub-class hierarchical division of the capping beam of the concrete simply-supported beam bridge substructure.

FIG. 8 is a schematic diagram of the subclass hierarchical division of the lower support of the concrete simply supported girder bridge.

FIG. 9 is a schematic diagram of the main pier class hierarchy division of the concrete simple-supported beam bridge substructure.

FIG. 10 is a schematic diagram of the subclass hierarchical division of pier beams of the lower structure of the concrete simply-supported beam bridge.

FIG. 11 is a schematic diagram of the subclass hierarchy of the concrete simple supported girder bridge auxiliary facilities.

Fig. 12 is a graph showing a change in a structure check period and an operation time.

Detailed Description

The technical scheme of the invention is mainly completed by depending on a rail transit bridge and tunnel electronic disease acquisition system, and the system mainly comprises a portable computer 6, a sensor 3, a data acquisition module 4 matched with the sensor, an electronic tag 2, an electronic tag scanner 5 and a computer terminal 7, as shown in fig. 1 and fig. 2.

The data acquisition module in fig. 3 includes a data acquisition module 11 connected to the sensor 8, a data analog-to-digital conversion and data storage module 13, a data wireless communication module 15, and communication lines 12 and 14 of the built-in data acquisition module and analog-to-digital conversion and data storage and wireless communication module, and the data acquisition module, the data storage module, the analog-to-digital conversion module, and the communication lines are all contained in a data acquisition module protective cover 10 so as to be attached to the surface of the structure or buried inside the structure.

The sensors 3 in fig. 1 and 2 are arranged inside or on the surface of the rail transit bridge tunnel structure 1 for a long time in a pre-buried or surface-adhered manner, so as to acquire state information of the rail transit bridge tunnel structure in an operation period; the data acquisition module 4 is used for acquiring, storing and transmitting monitoring data of the sensor 3; the portable computer 6 is used for collecting field disease data; the electronic tag 2 is used for positioning the inspection point and recording the current inspection result and the inspection information; the electronic tag scanner 5 completes the read-write work of the electronic tag information mainly according to the instruction of the portable computer; the computer terminal 7 is mainly used for finishing the inspection work planning and the storage and management work of the inspection result. The portable computer includes an input unit for inputting inspection information; and the evaluation unit determines the security level of each check point according to the check information and determines the check period of each check point according to the security level. The inspection information can be the content detected by the sensor and acquired by the portable computer from the data acquisition module in a wireless mode, or can be acquired by inputting data measured by other instruments or other modes by workers through manual input or other connection modes.

According to the specific embodiment of the invention, all the check points are provided with the electronic tags 2, or part of the check points are provided with the electronic tags 2, part of the check points are provided with the sensors 3, the sensors 3 are matched with the data acquisition module 4, generally the types of the sensors 3 mainly comprise displacement meters, strain gauges, reinforcing bar meters, soil pressure meters, convergence meters and the like, each sensor 3 should select a stressed key section of the tunnel structure of the rail transit bridge to be arranged, the position of the key section should be selected according to the geological conditions and the stress conditions actually passed through by the rail transit bridge and after calculation and analysis, for the tunnel structure, a position with relatively weak bearing capacity under the most adverse load action, a position with poor geological conditions, a position with large water pressure, a position with bias voltage, a segment joint position and the like should be selected, each key section sensor should be arranged at a position with large deformation or internal force and the like, if strain gauges are additionally arranged on the sections with relatively weak bearing capacity and the sections with bias voltage according to actual stress, displacement gauges and soil pressure gauges are additionally arranged at the positions with poor geological conditions and longitudinal joints of the segments; for a bridge structure, generally, a section with larger stress under the most adverse load action is selected, such as a simply supported bridge span middle maximum bending moment section, a fulcrum maximum shear section, a continuous bridge span middle maximum bending moment section, a fulcrum negative bending moment section, a fulcrum maximum shear section and the like, a stress meter is arranged at the positions, and an accelerometer is arranged for a structure needing to test modal parameters.

The position of the check point is set according to the checking plan given by the computer terminal, usually, the check point position is respectively arranged according to the rail transit bridge and tunnel components (the duct piece, the vertical shaft, the connecting channel, the water-proof and drainage facility, the main beam of the rail transit bridge structure, the bridge pier, the arch rib, the suspender, the inclined zipper and the like), each component is uniformly divided according to the length or the area of the component when being arranged, and for the serious disease in the checking process, the check point is added at the position to strengthen the checking. The distance between the arrangement height of the check points and the portable computer is larger than the reading and writing distance of the electronic tag. The portable computer is provided with corresponding disease inspection software, can collect and store inspection data and has a wired or wireless data transmission function.

The inspection period of the rail transit bridge and tunnel structure defect inspection work is preferably calculated according to the following formula,

wherein,

n represents the design life of the structure;

nrepresents the operating time of the structure;

d represents an inspection cycle of the inspection work;

and M represents the current safety level of the structure, the value of the M is determined according to the grade division of the structural technical condition, and the M is reversely valued according to the change trend of the structural technical condition. When the structural technical condition is classified into 5 grades (the grading basis is 'road and bridge technical condition evaluation Standard' JTG/T H21-2011 and 'shield tunnel structure service performance identification Standard' (Shanghai city engineering construction Standard)), the value of M is 1,2,3,4 and 5, and when the structural technical condition is good, 5 is taken, and when the structural technical condition is worst, 1 is taken.

As can be seen from the formula, the structure check period and the operation time conform to the curve change relationship shown in fig. 12 (for example, N =100 years, and M = 1). The curve shows that the inspection cycle of the rail transit bridge tunnel structure is preferably 40-37 days at the initial construction stage (0-20 years), 37-32 days at the middle operation stage (21-60 years), and 32-7 days at the later operation stage (61-100 years). If the structural state grade of the period is evaluated as 2-5 grades, the corresponding checking period is calculated according to the formula. The number of days included in the checking period is more different when the structural state levels are different in the initial operation stage, and the number of days different in the checking period of the structural state levels is gradually reduced along with the continuous degradation of the structural state.

After the workers finish the disease collection work, collected disease information and sensor data are gathered to a terminal disease management computer, the terminal rail transit bridge and tunnel structure disease management evaluation software adopts a related bridge and tunnel structure state evaluation method to evaluate the current state of the structure in a grading mode, and the structure maintenance workers perform subsequent maintenance management and maintenance work according to the evaluation result.

And (4) carrying out state evaluation on the bridge and tunnel structures by adopting an analytic hierarchy process based on a fuzzy algorithm. The algorithm divides the structure according to the level of parts, components and diseases, evaluates the indexes of the diseases at the bottom layer based on a fuzzy algorithm, calculates the weight of each layer of indexes according to a fuzzy judgment matrix obtained by expert investigation, and obtains the overall technical state of the structure to be evaluated through a weighted average method.

The method comprises the following specific evaluation steps:

(1) establishing a hierarchical division index system of each component and member of the structure, as shown in FIG. 4; the bridge structure can be specifically divided according to the levels of fig. 5 to 11. That is, the concrete simply supported girder bridge can be divided into an upper structure, a lower structure and an auxiliary facility, wherein the upper structure is a main girder, and the lower structure is divided into a main pier and a support. The substructure is further divided into main piers, supports, capping beams and pier beams. The auxiliary structure is divided into a limit, a cable, a viaduct drainage facility and an expansion joint.

(2) The expert marks the relative importance of each layer of indexes and establishes a fuzzy judgment matrix of the layer; the fuzzy judgment matrix represents the comparison of relative importance of the previous layer element and the related element, and a '0-1' scale method is adopted in the construction process. Each element in the fuzzy decision matrix representsIndex of individual factorAnd a firstIndex of individual factorRelative degree of importance therebetween, and satisfies. When element isIs shown byAndequally important; when in useIs shown byRatio ofImportance; when in useIs shown byRatio ofImportantly, when，. If a fuzzy judgment matrix is established for the concrete simply supported beam bridge component layer, a 0-1 scale method is adopted for construction, and the following table 1 is shown.

TABLE 1 fuzzy judgment matrix configuration Table

Value of element	Superstructure	Substructure	Accessories	Weight of
					Superstructure	0.5	0.5	0.8	0.433
Substructure	0.5	0.5	0.8	0.433
					Accessories	0.2	0.2	0.5	0.134

(3) And verifying the consistency of the fuzzy judgment matrix. If the elements of the fuzzy judgment matrix satisfyThen the matrix is called as fuzzy consistent judgment matrix. An essential condition for determining matrix ambiguity is to arbitrarily specify that the difference between corresponding elements of two rows is constant. And for the fuzzy judgment matrix which does not meet the consistency, the elements of the fuzzy judgment matrix need to be adjusted until the consistency is met.

(4) Calculating the weight of each layer of index; the fuzzy judgment matrix contains the weight of each factor index,middle elementAnd the weight valueAndthe relationship of (1) is:weight valueIs calculated by the formulaWhereinto satisfyThe parameter (c) of (c). The calculation of the weights can be referred to table 1.

(5) Membership functions are determined. Membership functions can reflect the degree to which elements belong to fuzzy sets, enabling quantitative representation of fuzzy concepts. The value range of the membership function is [0,1 ]. The key to effectively apply the fuzzy theory is to provide a membership function which is practical for the fuzzy object. According to the characteristics of the lowest-layer indexes divided by the structural layer, the ratio of the disease index measured value (or the maximum measured value) to the limit value specified by the specification is used as a calculation element of the fuzzy function, and the fuzzy grade of each index is judged by adopting a trapezoidal fuzzy function. If the main beam deformation index is established, x represents the ratio of the maximum deformation or deflection measured value to the standard limit value, and the membership function of each grade is as follows.

(6) And (6) fuzzy judgment. After the fuzzy grade of the indexes is calculated according to the membership function of each index, the evaluation result of the layer is obtained through the weighted average of the weight corresponding to the index of the layer, the evaluation result of the layer is further obtained through the weighted average of the result and the weight corresponding to the layer, and the state evaluation of the whole structure is finally completed layer by layer upwards. And finally, directly taking the grade with the maximum membership value in the fuzzy comprehensive evaluation grade vector as the evaluation grade according to a maximum membership degree judgment method aiming at the final evaluation value. And determining the safety level of each check point according to the evaluation level.

The working flow of the electronic disease acquisition system of the rail transit bridge tunnel structure is as follows.

Firstly, finishing an inspection work plan on a computer terminal, namely determining the work content, the inspection point position and corresponding staff of each inspection task, then sending the inspection plan content to each portable computer by a data management terminal, and carrying out data acquisition on the spot by the staff holding the portable computer; arranging electronic tags, sensors and data acquisition modules matched with the sensors according to positions in an inspection plan, wherein each electronic tag and each data acquisition module correspond to a corresponding check point, a worker inspects each check point in a rail transit bridge tunnel structure in sequence according to an inspection plan route in a portable computer, scanning the electronic tags through an electronic tag scanner at each check point and feeding back information to the portable computer, the portable computer calls inspection contents required by the check points according to the information in the electronic tags, the worker inspects and judges, after finishing the inspection information, the worker writes corresponding inspection results into the electronic tags through the scanner to be stored, and when the sensors are arranged at the check points, the worker wirelessly acquires data of the data acquisition modules matched with the sensors into the portable computer, and writing the on-site inspection information into the data acquisition module, completing the inspection work at the inspection point, and determining the safety level of the inspection point according to the monitoring parameters. In a portable computer, monitoring parameters (such as internal force of a key section, a segment dislocation value, a soil pressure value, a cable force and the like) of a sensor are divided into three levels, namely a safe state (within a safe value range of the parameters), a key attention state (the safe value of the parameters is 40% of a parameter limit value) and a warning state (40% of the parameter limit value to 60% of the parameter limit value), when the monitoring parameters are judged to be the key attention state, the inspection period of the inspection point is preferably shortened to one third of the original period, and inspection is enhanced; when the disease is judged to be in the warning state, the disease is checked every day, related departments are reported, and the disease reason is found out in time and maintained.

The invention is based on electronic equipment, realizes the full electronization of the inspection work of the tunnel structure of the rail transit bridge, standardizes the field work of workers, and improves the working quality, efficiency and enthusiasm of the workers, so the inspection technology provides a new way for the maintenance work of the tunnel structure of the rail transit bridge.

Claims (6)

1. An electronic disease acquisition system of a rail transit bridge tunnel structure is characterized in that each check point in the rail transit bridge tunnel structure is provided with an electronic tag, in addition, the system also comprises a portable computer, an electronic tag scanner connected with the portable computer and a computer terminal connected with the portable computer, sensors and data acquisition modules matched with the sensors are arranged at partial check points, the portable computer is communicated with the data acquisition modules in a wireless mode, and the portable computer comprises an input unit used for inputting inspection information; and the evaluation unit determines the security level of each check point according to the check information and determines the check period of each check point according to the security level.

2. The electronic disease collection system of claim 1 wherein the data collection module comprises a data collection module protective cover, and the data collection module, the data storage module, the data analog-to-digital conversion module, and the data communication module are disposed within the data collection module protective cover.

3. The electronic disease collection system of claim 2, wherein the sensors, the data collection module and the electronic tags are arranged inside or on the surface of the tunnel structure of the rail transit bridge in a pre-buried or surface-mounted manner for a long time.

4. An electronic disease collection system according to claim 2 wherein the sensor is a displacement meter, strain gauge, rebar meter, soil pressure meter or convergence meter.

5. A collection and analysis method of an electronic defect collection system of a rail transit bridge tunnel structure is provided, a plurality of check points are arranged in the rail transit bridge tunnel structure, and the method is characterized by comprising the following steps: A. the computer terminal finishes the inspection work planning, determines the work content, the inspection point position and the corresponding staff of each inspection task, sends the inspection planning content to each portable computer, and the staff holds the portable computer to carry out data acquisition on site; B. the method comprises the steps that a worker examines check points in a rail transit bridge tunnel structure in sequence according to an examination planning route in a portable computer, scans an electronic tag through an electronic tag scanner and feeds back information to the portable computer, the portable computer calls examination content required by the check points according to the information in the electronic tag, the worker examines and judges, after the worker finishes the examination information, a corresponding examination result is recorded into the portable computer and written into the electronic tag through the scanner for storage, when a sensor is arranged at the check point, the worker wirelessly collects monitoring parameters from a data collection module matched with the sensor into the portable computer, writes field examination information into the data collection module and finishes examination work at the check point; C. and the evaluation unit of the portable computer determines the safety level of each check point according to the check result and the monitoring parameters, and determines the check period of each check point according to the safety level.

6. The collecting and analyzing method as claimed in claim 5, wherein the step C of determining the security level of the checking point according to the monitoring parameters further comprises the steps of a, establishing a hierarchical division index system of each component and member of the structure; b. scoring the relative importance of each layer of indexes, and establishing a fuzzy judgment matrix of the layer; c. verifying the consistency of the fuzzy judgment matrix; d. calculating the weight of each layer of index; e. determining a membership function, taking the ratio of the disease index measured value to a limit value specified by a specification as a calculation element of a fuzzy function, and judging the fuzzy grade of each index by adopting a trapezoidal fuzzy function; f. and fuzzy evaluation, namely calculating the fuzzy grade of the index according to the membership function of each index, obtaining the evaluation result of the layer through weighted averaging corresponding to the index of the layer, further obtaining the evaluation result of the layer through weighted averaging of the result and the corresponding weight of the layer, and finally finishing the state evaluation of the whole structure layer by layer upwards to obtain the safety grade of each check point.