Slope deformation testing method based on microwave vibration measurement

Abstract

The invention relates to the technical field of deformation monitoring, in particular to a side slope deformation testing method based on microwave vibration measurement, which comprises the following steps: uploading side slope structure parameters, constructing a side slope three-dimensional model based on the side slope structure parameters, and capturing symmetrical microwave vibration measurement points on the side slope three-dimensional model; when symmetrical microwave vibration measurement points are captured on the side slope three-dimensional model, the side slope three-dimensional model is symmetrically segmented by taking the middle line of a bridge pavement supported by the side slope as a segmentation position to obtain two sub-side slope three-dimensional models, any one of the sub-side slope three-dimensional models is taken as a microwave vibration measurement point capturing object, and the microwave vibration measurement points are captured by taking the other sub-side slope three-dimensional model as a microwave vibration measurement point capturing object. Executing a capture operation; according to the method, the microwave vibration measurement position is designed in combination with the structural characteristics of the side slope in a mode of constructing the three-dimensional model of the side slope, so that symmetrical microwave vibration measurement is carried out at the position where side slope deformation can be more represented in the microwave vibration measurement stage to collect microwave signals, and the side slope deformation risk is further analyzed and judged in combination with the collected microwave signals.

Description

Technical Field

[0001] The present invention relates to the technical field of deformation monitoring, and particularly to a slope deformation test method based on microwave vibration measurement. Background Art

[0002] The deformation of a bridge slope refers to the change in the shape and position of the slope around the bridge. Affected by geological conditions, water erosion, earthquakes, and human engineering activities, the displacement, settlement, and cracking of the slope soil or rock mass occur. Slight deformation affects the durability of the bridge. In severe cases, it may cause slope instability and damage to the bridge structure, threatening traffic safety. Therefore, it is necessary to monitor and give early warnings in a timely manner and take reinforcement and protection measures.

[0003] A slope deformation monitoring method is disclosed in the invention patent with the application number 202410954578.4, which is applied to a slope deformation monitoring system. The slope deformation monitoring system includes: a data acquisition module, a data processing module, and a modeling and monitoring module; the method includes: the data acquisition module acquires image data of different orientations on the surface of the slope and sensor data inside the slope, and sends the image data and the sensor data to the data processing module. The sensor data includes: multi-point displacement meter data and piezometer data; the data processing module obtains fusion data through data fusion processing based on the image data and the sensor data, and sends the fusion data to the modeling and monitoring module; wherein, the fusion data is used to represent the internal and external data correlation relationship of the slope; the modeling and monitoring module monitors the slope numerical model according to the fusion data, the geological information of the slope, the sensor installation information, and a pre-constructed slope numerical model to determine the deformation information of the slope; the slope deformation monitoring system further includes: a warning module and an information feedback module; after monitoring the slope numerical model and determining the deformation information of the slope, it further includes: the modeling and monitoring module sends the deformation information of the slope to the warning module, and the warning module determines whether to output a warning message according to the deformation information of the slope and a preset warning threshold.

[0004] This application aims to solve the problem that: "Traditional slope monitoring technologies mainly include measurement methods such as ground penetrating radar detection, surface displacement monitoring, groundwater level monitoring, and borehole inclinometer measurement. Although they can reflect the internal stress changes and deformation conditions of the slope to a certain extent, there are some limitations in the implementation process. For example: in the direct monitoring methods relying on physical sensors, physical sensors are easily affected by natural environmental factors such as temperature, humidity, and weathering during long-term operation, resulting in large fluctuations in data accuracy. Moreover, the layout of internal monitoring points of the slope is limited by geological conditions and engineering requirements, and cannot cover the entire slope, possibly resulting in monitoring blind spots."

[0005] However, in the scenario of bridge roads, the current slope deformation monitoring work does not comprehensively adopt microwave vibration measurement technology to specifically achieve slope deformation testing and monitoring. To fill this technical gap, we propose a slope deformation testing method based on microwave vibration measurement. Summary of the Invention

[0006] Aiming at the above-mentioned shortcomings of the existing technology, the present invention provides a slope deformation testing method based on microwave vibration measurement, which solves the technical problems proposed in the above background technology.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0008] A slope deformation testing method based on microwave vibration measurement, including:

[0009] Upload slope structure parameters, construct a three-dimensional slope model based on the slope structure parameters, and capture symmetric microwave vibration measurement points on the three-dimensional slope model; design a microwave vibration measurement period, obtain the microwave vibration measurement points captured on the three-dimensional slope model, and based on the microwave vibration measurement period, use a microwave vibration measurement device to emit microwave signals to the slope, receive the slope reflection signals in real time, and synchronously convert the slope reflection signals into electrical signals; mark the source timestamp and source microwave vibration measurement points of the electrical signals, continuously record the electrical signals, analyze the symmetry of the electrical signals belonging to the symmetric microwave vibration measurement points at the same timestamp, and evaluate the slope deformation index according to the symmetry analysis results; set a slope deformation risk determination interval, obtain the slope deformation index evaluation result, and compare the evaluation result with the set slope deformation risk determination interval to determine whether the evaluation result is within the slope deformation risk determination interval; if the determination result is no, end; if the determination result is yes, sniff the source of the slope deformation risk.

[0010] Furthermore, after the three-dimensional slope model is constructed, synchronously select and measure the coordinates of any point on the surface of the actual slope, further map the coordinates to the corresponding point positions in the three-dimensional slope model, replace the coordinates of the corresponding points in the construction space of the three-dimensional slope model, and then calculate the coordinate scaling ratio based on the original coordinates and the replaced coordinates of the corresponding points in the construction space of the three-dimensional slope model. Further, iterate the original coordinates of all points in the three-dimensional slope model located in the construction space of the three-dimensional slope model based on the coordinate scaling ratio, so that the coordinates of any point on the three-dimensional slope model are consistent with the actual coordinates of the corresponding point on the slope;

[0011] Among them, the coordinates of the surface of the actual slope selected and measured are user-defined. When the user selects coordinates on the surface of the actual slope, it is preferred to select the central point position of the area where the slope is located from the perspective of the top view plane of the actual slope to perform the coordinate measurement operation.

[0012] Furthermore, when capturing symmetric microwave vibration measurement points on the three-dimensional slope model, it follows:

[0013] Taking the center line of the bridge pavement supported by the slope as the division position, symmetrically divide the 3D slope model to obtain two sub-3D slope models. Select any one of the sub-3D slope models as the object for capturing microwave vibration measurement points and perform the capture operation;

[0014] Take all the corner points of the edges outside the division surface on the sub-3D slope model as microwave vibration measurement points;

[0015] Deploy a microwave vibration measurement point positioning grid on the top surface of the sub-3D slope model, and take all the grid points within the top surface range of the sub-3D slope model on the microwave vibration measurement point positioning grid as microwave vibration measurement points;

[0016] Traverse and clean the microwave vibration measurement points determined twice, and discard the repeated microwave vibration measurement points;

[0017] Among them, after determining the microwave vibration measurement points on one sub-3D slope model, determine the microwave vibration measurement points symmetric to the determined microwave vibration measurement points on the other sub-3D slope model. All the microwave vibration measurement points on the two sub-3D slope models are the results of symmetric capture of microwave vibration measurement points.

[0018] Furthermore, after deploying the microwave vibration measurement point positioning grid on the top surface of the sub-3D slope model, by rotating and translating the microwave vibration measurement point positioning grid, when the number of grid points falling within the top surface range of the sub-3D slope model in the microwave vibration measurement point positioning grid is the least, take all the grid points falling within the top surface range of the sub-3D slope model;

[0019] When deploying the microwave vibration measurement point positioning grid, set the grid line spacing of the microwave vibration measurement point positioning grid:

[0020] ;

[0021] In the formula: is the grid line spacing of the microwave vibration measurement point positioning grid; is the spacing base number; is the slope thickness; is the top area of the slope; is the slope gradient; is the volume of the excavation space of the slope base layer; is the volume of the excavated soil of the slope base layer; is the weight; is the total number of accidents that have occurred in the history of the bridge to which the slope belongs; is the total number of accidents in which the slope or the main body of the bridge collided in the history of accidents that have occurred in the bridge to which the slope belongs; is the normalization factor;

[0022] Among them, the spacing base number is user-defined, Used to represent the looseness coefficient of the slope base soil, the weight value range is (0, 1), and the normalization factor For controlling The value of within the range of

[0023] Furthermore, the design logic of the microwave vibration measurement period follows:

[0024] Create a cloud database, record the time and location of historical accidents on the bridge road surface supported by the slope in the cloud database;

[0025] The user-defined microwave vibration measurement period interval, and the microwave vibration measurement device periodically performs microwave vibration measurement operations based on the median value of the microwave vibration measurement period interval;

[0026] When a new accident occurrence event and location appear in the cloud database, the original applied microwave vibration measurement period is continuously reduced to the shortest microwave vibration measurement period based on a specified ratio;

[0027] After the application of the microwave vibration measurement period reaches the shortest microwave vibration measurement period, it returns to the median value of the microwave vibration measurement period interval, and further continuously increases to the longest microwave vibration measurement period based on a specified ratio, and then returns to the median value of the microwave vibration measurement period interval, and so on, continuously applying the microwave vibration measurement period in the microwave vibration measurement period interval to perform microwave vibration measurement operations.

[0028] Furthermore, the specified ratio used when the microwave vibration measurement period changes follows:

[0029] ;

[0030] In the formula: is the ratio used when the microwave vibration measurement period changes; , are the mass and speed of the accident vehicle; , are the maximum safe mass and limit speed of the accident vehicle; is the collision position score; is the service time of the slope-supported bridge; is the specified service life of the slope-supported bridge; is a constant; is the weight;

[0031] Among them, the collision position score takes values in the range of 0 to 1. The closer the collision position is to the slope, the larger the value; otherwise, the smaller the value. The constant is a positive integer within the range of 1 to 10 and is user-defined. The constant has a default value of 10, and the weight All are positive numbers and their sum is 1, the weights are defined by the user side and at the same time follow , when the microwave vibration measurement period changes, it follows , represents the median of the microwave vibration measurement period interval, the number of times of performing microwave vibration measurement after the occurrence event and location of a new record appear in the cloud database.

[0032] Furthermore, the symmetry analysis logic of the electrical signals of the symmetric microwave vibration measurement points at the same time stamp is expressed as:

[0033] ;

[0034] In the formula: is the electrical signal symmetry shown by the jth group of symmetric microwave vibration measurement points; is the number of sampling points in the corresponding time interval of the electrical signal diagram; , are the signal amplitudes of the electrical signal diagram A at the discrete time point and the signal amplitude of the electrical signal diagram B at the discrete time point ; is the result of symmetrically mapping the electrical signal B relative to the electrical signal A on the time axis;

[0035] Further, based on the above formula, the electrical signal symmetry is analyzed by applying all symmetric microwave vibration measurement points:

[0036] ;

[0037] In the formula: is the electrical signal symmetry; is the total number of symmetric microwave vibration measurement points; is the configured weight;

[0038] Among them, the electrical signal symmetry the larger the value, the better the electrical signal symmetry, on the contrary, the worse the electrical signal symmetry, , and it follows that the closer the microwave vibration measurement point is to the slope, the larger the value of the configured weight product object, on the contrary, the smaller the value.

[0039] Furthermore, the slope deformation risk determination interval is defined by the user side;

[0040] The operation of determining whether the evaluation result is within the slope deformation risk determination interval is continuously executed according to the operation of the microwave vibration measurement device;

[0041] The evaluation logic of the slope deformation index is expressed as:

[0042] ;

[0043] In the formula: is the slope deformation index; is the symmetry of the electrical signal; is a constant;

[0044] Among them, the slope deformation index The smaller it is, the lighter the slope deformation problem is. On the contrary, it means the slope deformation problem is more serious. The constant > 1, which is used to control the value of to avoid being too large or too small.

[0045] Furthermore, the sniffing logic of the source of slope deformation risk is expressed as:

[0046] Obtain the symmetry of the electrical signals shown by all symmetric microwave vibration measurement points, denoted as ;

[0047] Substitute each item in into the calculation formula of for iteration , then calculate The calculation result of is denoted as , and further compare it with each item in the slope deformation risk determination interval and to capture the target that does not conform to the slope deformation risk determination interval in ;

[0048] Capture one microwave vibration measurement point in the symmetric microwave vibration measurement points to which the target belongs, which is the sniffing result of the source of slope deformation risk.

[0049] Furthermore, the operation of setting microwave vibration measurement points on the slope three-dimensional model is iterated based on the user-defined period.

[0050] Adopting the technical solution provided by the present invention, compared with the known public technology, it has the following beneficial effects:

[0051] The present invention provides a slope deformation test method based on microwave vibration measurement. During the execution of this method, by constructing a slope three-dimensional model and combining the slope structure characteristics to design the microwave vibration measurement positions, symmetric microwave vibration measurement is carried out at positions that can better represent slope deformation during the microwave vibration measurement stage to collect microwave signals. Further, the slope deformation risk is analyzed and determined in combination with the collected microwave signals. At the same time, when it is determined that there is a deformation risk on the slope, the deformation source point can also be referenced and located based on the microwave vibration measurement positions on the slope, assisting the users of bridge slope safety management to monitor and manage the bridge slope deformation more quickly, accurately, real-time and effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0053] Figure 1 It is a schematic flowchart of a slope deformation test method based on microwave vibration measurement;

[0054] Figure 2 It is a schematic diagram of the state of deploying a microwave vibration measurement point positioning grid on the top surface of the slope three-dimensional model in the present invention. Specific embodiments

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0056] The following further describes the present invention with reference to the embodiments.

[0057] Embodiment 1:

[0058] A slope deformation test method based on microwave vibration measurement in this embodiment, as Figure 1 shown, includes:

[0059] Upload the slope structure parameters, construct a slope three-dimensional model based on the slope structure parameters, and capture symmetric microwave vibration measurement points on the slope three-dimensional model;

[0060] When capturing symmetric microwave vibration measurement points on the slope three-dimensional model, it follows that:

[0061] Taking the center line of the bridge road surface supported by the slope as the division position, symmetrically divide the slope three-dimensional model to obtain two sub-slope three-dimensional models. Taking any one of the sub-slope three-dimensional models as the object for capturing microwave vibration measurement points, perform the capture operation;

[0062] Taking all the corner points of the edges outside the division surface on the sub-slope three-dimensional model as microwave vibration measurement points;

[0063] Deploy a microwave vibration measurement point positioning grid on the top surface of the sub-slope three-dimensional model, and taking all the grid points within the top surface range of the sub-slope three-dimensional model on the microwave vibration measurement point positioning grid as microwave vibration measurement points;

[0064] Traverse the microwave vibration measurement points determined by cleaning twice, and discard the repeated microwave vibration measurement points;

[0065] Among them, after determining the microwave vibration measurement points on a three-dimensional model of a slope, determine the microwave vibration measurement points symmetric to the determined microwave vibration measurement points on another three-dimensional model of a slope. All the microwave vibration measurement points on the two three-dimensional models of the slope are the results of symmetric capture of the microwave vibration measurement points;

[0066] After deploying the microwave vibration measurement point positioning grid on the top surface of the three-dimensional model of the slope, by rotating and translating the microwave vibration measurement point positioning grid, when the number of grid points falling within the range of the top surface of the three-dimensional model of the slope in the microwave vibration measurement point positioning grid is the least, all the grid points falling within the range of the top surface of the three-dimensional model of the slope are selected;

[0067] When deploying the microwave vibration measurement point positioning grid, set the grid line spacing of the microwave vibration measurement point positioning grid:

[0068] ;

[0069] In the formula: is the grid line spacing of the microwave vibration measurement point positioning grid; is the spacing base number; is the slope thickness; is the top area of the slope; is the slope gradient; is the volume of the excavation space of the slope base layer; is the volume of the excavated soil of the slope base layer; is the weight; is the total number of accidents that have occurred in the history of the bridge to which the slope belongs; is the total number of accidents in which the slope or the main body of the bridge collided in the history of the accidents that have occurred in the bridge to which the slope belongs; is the normalization factor;

[0070] Among them, the spacing base number is user-defined, used to represent the loose coefficient of the soil in the slope base layer. The weight value range is (0, 1), and the normalization factor is used to control the value of within the range;

[0071] Through the above logical formula calculation, calculate the grid line spacing of the microwave vibration measurement point positioning grid, thereby further defining the capture logic of the microwave vibration measurement points;

[0072] Design the microwave vibration measurement period, obtain the microwave vibration measurement points captured on the three-dimensional model of the slope, based on the microwave vibration measurement period, emit microwave signals to the slope using the microwave vibration measurement equipment, receive the slope reflection signals in real time, and synchronously convert the slope reflection signals into electrical signals;

[0073] The design logic of the microwave vibration measurement period follows:

[0074] Create a cloud database and record the time and location of historical accidents on the bridge road surface supported by the slope in the cloud database;

[0075] The user-defined microwave vibration measurement period interval, and the microwave vibration measurement device periodically performs microwave vibration measurement operations based on the median value of the microwave vibration measurement period interval;

[0076] When a new record of the accident occurrence event and location appears in the cloud database, the original applied microwave vibration measurement period is continuously reduced to the shortest microwave vibration measurement period based on a specified ratio;

[0077] After the application of the microwave vibration measurement period reaches the shortest microwave vibration measurement period, it returns to the median value of the microwave vibration measurement period interval, and then continuously increases to the longest microwave vibration measurement period based on a specified ratio, and then returns to the median value of the microwave vibration measurement period interval. By analogy, the microwave vibration measurement period in the microwave vibration measurement period interval is continuously applied to perform microwave vibration measurement operations;

[0078] The specified ratio used when the microwave vibration measurement period changes follows:

[0079] ;

[0080] Where: is the ratio used when the microwave vibration measurement period changes; 、 are the mass and speed of the accident vehicle; 、 are the maximum safe mass and limit speed of the accident vehicle; is the collision location score; is the service life of the bridge supported by the slope; is the specified service life of the bridge supported by the slope; is a constant; is a weight;

[0081] Among them, the collision location score takes values in the range of 0 to 1. The closer the collision location is to the slope, the larger the value; otherwise, the value is smaller. The constant is a positive integer in the range of 1 to 10 and is user-defined. The constant has a default value of 10. The weights are all positive numbers and their sum is 1. The weight is user-defined and also follows When the microwave vibration measurement period changes, it follows , represents the median value of the microwave vibration measurement period interval, The number of times of microwave vibration measurement after the occurrence event and location of a new record appear in the cloud database; It should be noted that the above formula considers the value of K from three aspects. By weakening the two parameters (the service life of the slope supporting the bridge and the specified service life of the slope supporting the bridge) multiplied in the formula on the overall calculation result of the formula;

[0082] The proportion used when the microwave vibration measurement period changes is calculated through the above logical formula, providing specified change logic support for the change of the microwave vibration measurement period in the method of this embodiment.

[0083] Mark the source timestamp and the source microwave vibration measurement point of the electrical signal, continuously record the electrical signal, analyze the symmetry of the electrical signals belonging to the symmetric microwave vibration measurement points at the same timestamp, and evaluate the slope deformation index according to the symmetry analysis result;

[0084] The symmetry analysis logic of the electrical signals belonging to the symmetric microwave vibration measurement points at the same timestamp is expressed as:

[0085] ;

[0086] In the formula: is the electrical signal symmetry shown by the jth group of symmetric microwave vibration measurement points; is the number of sampling points in the time interval corresponding to the electrical signal diagram; , are the signal amplitudes of the electrical signal diagram A at the discrete time point and the signal amplitude of the electrical signal diagram B at the discrete time point ; is the result of symmetric mapping of the electrical signal B relative to the electrical signal A on the time axis;

[0087] Further analyze the symmetry of the electrical signal based on the above formula for all symmetric microwave vibration measurement points:

[0088] ;

[0089] In the formula: is the electrical signal symmetry; is the total number of symmetric microwave vibration measurement points; is the configured weight;

[0090] Among them, the electrical signal symmetry The larger the value, the better the symmetry of the electrical signal. On the contrary, it means the symmetry of the electrical signal is worse. , and it follows that the closer the microwave vibration measurement point corresponding to the configured weight product object is to the slope, the larger the value. On the contrary, the value is smaller;

[0091] Set the risk judgment interval of slope deformation, obtain the evaluation result of the slope deformation index, compare the evaluation result with the set risk judgment interval of slope deformation, and determine whether the evaluation result is within the risk judgment interval of slope deformation;

[0092] If the judgment result is no, end;

[0093] If the judgment result is yes, sniff the source of slope deformation risk;

[0094] The risk judgment interval of slope deformation is user-defined;

[0095] The operation of determining whether the evaluation result is within the risk judgment interval of slope deformation is continuously executed according to the operation of the microwave vibration measurement device;

[0096] The evaluation logic of the slope deformation index is expressed as:

[0097] ;

[0098] In the formula: is the slope deformation index; is the symmetry of the electrical signal; is a constant;

[0099] Among them, the slope deformation index The smaller it is, the lighter the slope deformation problem is. On the contrary, the more serious the slope deformation problem is. The constant > 1, used to control The value of to avoid being too large or too small;

[0100] The sniffing logic of the source of slope deformation risk is expressed as:

[0101] Obtain the symmetry of the electrical signals shown by all symmetric microwave vibration measurement points, denoted as ;

[0102] Substitute each item in into the calculation formula of to iterate , then calculate The calculation result of is denoted as , and further compare the risk judgment interval of slope deformation with each item in , and capture the target that does not conform to the risk judgment interval of slope deformation in ;

[0103] Through the above logical formula calculation, calculate the slope deformation index, so as to provide support for the final analysis and judgment of the slope deformation risk in the method of this embodiment.

[0104] Sniff out the result of a microwave vibration measurement point among the symmetric microwave vibration measurement points to which the target belongs, which is the source of slope deformation risk.

[0105] In this embodiment, through the execution of the method in the above embodiment, microwave vibration measurement technology brings deformation testing and monitoring to the bridge slope, assisting the bridge slope management user to more quickly monitor the deformation state of the bridge slope, and thus implementing safety management and maintenance of the bridge slope based on this, ensuring the functionality and safety of the bridge where the slope is located;

[0106] See Figure 2 As shown, based on the arrow indication in the figure, the specific operation state of deploying the microwave vibration measurement point positioning grid on the top surface of the slope three-dimensional model is shown;

[0107] Embodiment 2:

[0108] At the specific implementation level, on the basis of Embodiment 1, this embodiment further specifically describes a slope deformation testing method based on microwave vibration measurement in Embodiment 1 with reference to Figure 1 :

[0109] After the slope three-dimensional model is constructed, synchronously select and measure the coordinates of any point on the surface of the actual slope, and further map the coordinates to the corresponding point position in the slope three-dimensional model, replacing the coordinates of the corresponding point in the construction space of the slope three-dimensional model. Then, calculate the coordinate scaling ratio based on the original coordinates and the replaced coordinates of the corresponding point in the slope three-dimensional model in the construction space of the slope three-dimensional model, and further iterate the original coordinates of all points in the slope three-dimensional model in the construction space of the slope three-dimensional model based on the coordinate scaling ratio, so that the coordinates of any point on the slope three-dimensional model are consistent with the actual coordinates of the corresponding point on the slope;

[0110] Among them, the coordinates of the surface of the actual slope selected and measured are user-defined. When the user selects coordinates on the surface of the actual slope, it is preferred to select the central point of the area where the slope is located from the perspective of the top view plane of the actual slope to perform the coordinate measurement operation.

[0111] Through the above settings, it provides further support for the execution of the steps in the method in Embodiment 1 above, and further defines the logic and process of converting the coordinate axis system of the slope three-dimensional model.

[0112] As Figure 1 shown, the operation of setting microwave vibration measurement points on the slope three-dimensional model is iterated based on user-defined cycles.

[0113] Through the above settings, it provides further continuous execution logic for the steps of the method in Embodiment 1 above.

[0114] In summary, in the process of executing the method in the above embodiments, by constructing a three-dimensional model of the slope and combining the slope structure characteristics to design the microwave vibration measurement positions, the microwave vibration measurement stage can perform symmetric microwave vibration measurement at positions that can better represent the slope deformation to collect microwave signals. Further, by combining the collected microwave signals, the slope deformation risk is analyzed and determined. At the same time, when it is determined that there is a slope deformation risk, the deformation source point can also be referenced and located based on the microwave vibration measurement positions on the slope, assisting the users of bridge slope safety management to monitor and manage the bridge slope deformation more quickly, accurately, real-timely and effectively.

[0115] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A slope deformation testing method based on microwave vibration measurement, characterized in that: include: Upload the slope structural parameters, build a three-dimensional slope model based on the slope structural parameters, and capture symmetrical microwave vibration measurement points on the three-dimensional slope model; Design a microwave vibration measurement cycle, obtain microwave vibration measurement points captured on the three-dimensional model of the slope, use microwave vibration measurement equipment to transmit microwave signals to the slope based on the microwave vibration measurement cycle, receive slope reflection signals in real time, and synchronously convert slope reflection signals into electrical signals; The source time stamp and source microwave vibration measurement point of the electrical signal are marked, and the electrical signal is continuously recorded. The symmetry of the electrical signal belonging to the symmetrical microwave vibration measurement point at the same time stamp is analyzed, and the slope deformation index is evaluated according to the symmetry analysis results. Set a slope deformation risk determination interval, obtain a slope deformation index assessment result, compare the assessment result with the set slope deformation risk determination interval, and determine whether the assessment result is within the slope deformation risk determination interval; If the result is no, end; The judgment result is yes, and the source of slope deformation risk is sniffed.

2. A slope deformation testing method based on microwave vibration measurement according to claim 1, characterized in that: After the three-dimensional model of the slope is constructed, the coordinates of any point on the actual slope surface are synchronously selected and measured, and the coordinates are further mapped to the corresponding point position in the three-dimensional model of the slope, and the coordinates of the corresponding point in the three-dimensional model of the slope are replaced. The coordinate scaling ratio is then calculated using the original coordinates of the corresponding point of the three-dimensional model of the slope in the three-dimensional model of the slope construction space and the replaced coordinates. The original coordinates of all points in the three-dimensional model of the slope in the three-dimensional model of the slope construction space are further iterated based on the coordinate scaling ratio, so that the coordinates of any point on the three-dimensional model of the slope are consistent with the actual coordinates of the corresponding point on the slope; The selected and measured actual slope surface coordinates are customized by the user end. When the user end selects coordinates on the actual slope surface, the center point of the area where the slope is located in the actual slope top view plane perspective is preferentially selected to perform the coordinate measurement operation.

3. The slope deformation testing method based on microwave vibration measurement according to claim 1 is characterized in that: When capturing symmetrical microwave vibration measurement points on the slope 3D model, the following should be followed: The center line of the bridge pavement supported by the slope is used as the segmentation position, and the slope 3D model is symmetrically segmented to obtain two sub-slope 3D models. Any one of the slope sub-3D models is used as a microwave vibration measurement point capture object to perform the capture operation; All corner points outside the split surface on the slope sub-3D model are used as microwave vibration measurement points; Deploy a microwave vibration measurement point positioning grid on the top surface of the slope sub-3D model, and use all grid points within the top surface of the slope sub-3D model on the microwave vibration measurement point positioning grid as microwave vibration measurement points; Traverse and clean the microwave vibration measurement points determined twice, and discard the repeated microwave vibration measurement points; Among them, after the microwave vibration measurement points are determined on one slope sub-3D model, microwave vibration measurement points symmetrical to the determined microwave vibration measurement points are determined on another slope sub-3D model. All microwave vibration measurement points on the two slope sub-3D models are the results of symmetrical capture of the microwave vibration measurement points.

4. The slope deformation testing method based on microwave vibration measurement according to claim 3 is characterized in that: After the microwave vibration measurement point positioning grid is deployed on the top surface of the slope sub-3D model, all the grid points falling within the top surface of the slope sub-3D model are selected by rotating and translating the microwave vibration measurement point positioning grid when the number of grid points in the microwave vibration measurement point positioning grid falling within the top surface of the slope sub-3D model is the least; When the microwave vibration measurement point positioning grid is deployed, the grid line spacing of the microwave vibration measurement point positioning grid is set: ； Where: The grid line spacing of the microwave vibration measurement point positioning grid; is the spacing base; is the slope thickness; is the top area of ​​the slope; is the slope slope; The excavation space volume for the slope base; Volume of soil excavated for slope base; is the weight; is the total number of historical accidents on the bridges to which the slope belongs; The total number of accidents involving collisions with the slope or the main body of the bridge in the history of the bridge to which the slope belongs; is the normalization factor; Among them, the spacing base Customized by the user. It is used to represent the looseness coefficient of the slope base soil. The weight value range is (0, 1). The normalization factor For control The value of within the range.

5. The slope deformation testing method based on microwave vibration measurement according to claim 1 is characterized in that: The design logic of the microwave vibration measurement cycle follows: Create a cloud database to record the time and location of historical accidents on the slope-supported bridge pavement; The user terminal customizes the microwave vibration measurement cycle interval, and the microwave vibration measurement device periodically performs the microwave vibration measurement operation based on the median value of the microwave vibration measurement cycle interval; When a new record of an accident event and location appears in the cloud database, the original microwave vibration measurement cycle is continuously reduced to the shortest microwave vibration measurement cycle based on a specified ratio; After the application of the microwave vibration measurement cycle reaches the shortest microwave vibration measurement cycle, it is restored to the median of the microwave vibration measurement cycle interval. After further continuously increasing to the longest microwave vibration measurement cycle based on a specified ratio, it is restored to the median of the microwave vibration measurement cycle interval. And so on, the microwave vibration measurement cycles in the microwave vibration measurement cycle interval are continuously applied to perform microwave vibration measurement operations.

6. A slope deformation testing method based on microwave vibration measurement according to claim 5, characterized in that: The microwave vibration period is changed in accordance with the specified ratio: ； Where: It is the ratio used when the microwave vibration period changes; , The mass and speed of the accident vehicle; , The maximum safety mass and maximum speed of the accident vehicle; Score the collision location; The service life of the slope-supported bridge; Establishing a service life for slope-supported bridges; is a constant; is the weight; Among them, the collision location score The value is in the range of 0 to 1. The closer the collision position is to the slope, the larger the value is. Conversely, the smaller the value is. The constant A positive integer in the range of 1 to 10. The value is defined by the user. The constant The default value is 10, weight are all positive numbers and their sum is 1, weight The value is defined by the user and is subject to When the microwave vibration period changes, it obeys , represents the median value of the microwave vibration period interval, The number of times microwave vibration measurement is performed after a new accident event and location is recorded in the cloud database.

7. The slope deformation testing method based on microwave vibration measurement according to claim 1 is characterized in that: The symmetry analysis logic of the electrical signals belonging to the symmetrical microwave vibration measurement points at the same time stamp is expressed as: ； Where: is the symmetry of the electrical signals exhibited by the jth group of symmetrical microwave vibration measurement points; is the number of sampling points in the time interval corresponding to the electrical signal graph; , The electrical signal A is the graph at discrete time points The signal amplitude at the discrete time point The signal amplitude at ; The result of symmetrically mapping the electrical signal B relative to the electrical signal A on the time axis; Based on the above formula, all symmetrical microwave vibration measurement points are used to analyze the symmetry of the electrical signal: ； Where: is the symmetry of the electrical signal; is the total amount of symmetrical microwave vibration measuring points; To configure weights; Among them, the symmetry of the electrical signal The larger the value, the better the symmetry of the electrical signal, and vice versa, the worse the symmetry of the electrical signal. , and obeys the configuration weight product object. The closer the microwave vibration measurement point is to the slope, the larger the value is, and vice versa.

8. The slope deformation testing method based on microwave vibration measurement according to claim 1 is characterized in that: The slope deformation risk determination interval is user-defined; The operation of determining whether the evaluation result is within the slope deformation risk determination interval is continuously performed according to the operation of the microwave vibration measuring device; The evaluation logic of the slope deformation index is expressed as: ； Where: is the slope deformation index; is the symmetry of the electrical signal; is a constant; Among them, the slope deformation index The smaller the value, the lighter the slope deformation problem. On the contrary, the more serious the slope deformation problem. >1, used for control Avoid values ​​that are too large or too small.

9. The slope deformation testing method based on microwave vibration measurement according to claim 1 is characterized in that: The sniffing logic of the slope deformation risk source is expressed as: Obtain the symmetry of the electrical signals exhibited by all symmetrical microwave vibration measurement points, denoted as ; Will Substitute each item in The calculation formula is used to iterate , then calculate The calculation result is recorded as , and further determine the slope deformation risk interval and Compare the items in The target that does not meet the slope deformation risk determination interval is captured; Capture the sniffing result of one of the symmetrical microwave vibration measurement points to which the target belongs, that is, the source of slope deformation risk.

10. The slope deformation testing method based on microwave vibration measurement according to claim 1 is characterized in that: The operation of setting microwave vibration measurement points on the three-dimensional slope model is iterated based on a user-defined cycle.

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