Group pile displacement monitoring method, device and equipment of assembly type pile-slab structure and medium

Abstract

The invention relates to a pile group displacement monitoring method, device and equipment of an assembly type pile-slab structure and a medium, and belongs to the technical field of operation and maintenance safety of roads with the assembly type pile-slab structure.The pile group displacement monitoring method of the assembly type pile-slab structure comprises the steps that a pile group global dynamic strain monitoring network of the assembly type pile-slab structure is constructed; based on a global dynamic strain monitoring network, obtaining a dynamic strain real-time response of a pile-top plate body of the fabricated pile-plate structure under the action of a vehicle load; and obtaining a global dynamic strain characteristic value based on the dynamic strain real-time response, determining a sudden change point and a singular point of the global dynamic strain characteristic value based on the global dynamic strain characteristic value, determining the position of the singular point, and taking the position of the singular point as a pile group displacement identification result. By obtaining the dynamic strain change of the pile top plate body of the assembly type pile plate structure under the vehicle load effect, roadbed pile group displacement is recognized, and the recognition precision of pile group displacement is improved.

Description

Technical Field

[0001] The present invention relates to the field of operation and maintenance safety technology of assembled pile-plate structure highways, and in particular to a method, device, equipment and medium for monitoring the displacement of a pile group of assembled pile-plate structures. Background Art

[0002] The stress of prefabricated pile-slab highway structure is complex, and there are not many engineering application examples. The pile-slab highway structure has a long line, multiple spans, complex stress, and changeable geological environment. In addition, the lower structure, except for the abutment, is a single pile and a single column. The foundation is shallow and is greatly affected by geological changes and external forces, such as scouring of ditches, changes in water levels in ponds and rice fields, and external force collisions. The stability of the roadbed pile body during the operation period will cause varying degrees of damage to the highway slab body, causing losses to the life and property of the country and the people.

[0003] With the rapid development of sensing technology, a large number of slope pile foundation monitoring technologies and methods such as video AI recognition and GNSS positioning have emerged. For example, Patent No. CN115748841A, "A method for monitoring the deviation of impact-drilled cast-in-place piles in karst areas", combines BIM modeling and three-dimensional real-life models of drone oblique photography to visually identify the deviation of pile foundations one by one. Patent No. CN116892916A, "A verticality and deviation detection device for vertical components of foundation piles and engineering columns and engineering structures", monitors the deformation of a single pile foundation through a fixed bracket of GNSS and an inclinometer.

[0004] However, the slope pile foundation monitoring technologies and methods such as video AI recognition and GNSS positioning cannot meet the sensor network requirements for full coverage of route pile foundations, and it is difficult to achieve the technical problem of real-time monitoring of the entire area of ​​piles. Summary of the invention

[0005] In view of this, it is necessary to provide a method, device, equipment and medium for monitoring the displacement of pile groups in a prefabricated pile-plate structure to solve the technical problem that the entire pile body cannot be monitored in real time.

[0006] In order to solve the above problems, the present invention provides a method for monitoring the displacement of pile groups of an assembled pile-plate structure, comprising: A global dynamic strain monitoring network for pile groups of the prefabricated pile-sheet structure is constructed, and a real-time dynamic strain response of a pile top plate body of the prefabricated pile-sheet structure under vehicle load is obtained based on the global dynamic strain monitoring network; Based on the real-time response of the dynamic strain, the global dynamic strain eigenvalue is obtained, and based on the global dynamic strain eigenvalue, a global dynamic strain eigenvalue heat map is drawn. Based on the global dynamic strain eigenvalue heat map, the mutation points and singular points of the global dynamic strain eigenvalue are determined, and the positions of the singular points are determined, and the positions of the singular points are used as the pile group displacement identification results.

[0007] In a possible implementation, the pile group includes a plurality of pile foundations, and the pile group global dynamic strain monitoring network for constructing the assembled pile-plate structure includes: Based on the grating array strain sensing technology, the grating array strain sensing cable is buried at the bottom of the top plate of the assembled pile-plate structure to construct a full-area dynamic strain monitoring network for the pile group of the assembled pile-plate structure; The pile foundation position is obtained, and a mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the pile foundation position is constructed based on the pile foundation position and the global dynamic strain monitoring network.

[0008] In a possible implementation, the calculation formula for the real-time response of dynamic strain is: , in, for The first time of prefabricated pile-slab structure under vehicle load The dynamic strain response value of each sensor unit, For the The sensing unit of the grating array strain sensor cable, for Periodic prefabricated pile-sheet structure The measured value of the dynamic strain of each sensor unit, for Measured strain values ​​of prefabricated pile-sheet structure without vehicle load.

[0009] In a possible implementation, obtaining a global dynamic strain characteristic value based on the real-time response of the dynamic strain includes: Based on the normalized real-time response of dynamic strain and the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the position of the pile foundation, the global dynamic strain characteristic value is obtained.

[0010] In a possible implementation, the calculation formula of the normalized dynamic strain real-time response is: , in, is the normalized real-time response of dynamic strain, is the cumulative dynamic strain response value of the grating array strain sensor cable, It is the cumulative number of dynamic strain response values ​​of the grating array strain sensor cable.

[0011] In a possible implementation, the calculation formula of the global dynamic strain eigenvalue is: , in, is the global dynamic strain eigenvalue, is the statistical uniform time unit, is a uniform time unit, The pile foundation position of the prefabricated pile-sheet structure. is the number of the pile foundation, is the normalized result of the real-time response of dynamic strain, is the location number of the roadbed cross section. It is the longitudinal position number of the roadbed.

[0012] In a possible implementation, the method of drawing a global dynamic strain eigenvalue heat map based on the global dynamic strain eigenvalue, determining a mutation point and a singular point of the global dynamic strain eigenvalue based on the global dynamic strain eigenvalue heat map, and determining the location of the singular point, and using the location of the singular point as a pile group displacement identification result, includes: Building a characteristic value database based on the global dynamic strain characteristic value, and drawing a global dynamic strain characteristic value thermal map based on the characteristic value database; Based on the global dynamic strain eigenvalue heat map, the image similarity comparison is used to identify the mutation points in the time dimension and the singular points in the space dimension of the dynamic strain eigenvalue, and the location of the singular point is determined based on the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the position of the pile foundation, and the location of the singular point is used as the deformation position of the pile foundation.

[0013] On the other hand, the present invention also provides a pile group displacement monitoring device of an assembled pile-plate structure, comprising: A dynamic strain real-time response acquisition module is used to construct a global dynamic strain monitoring network for pile groups of the assembled pile-sheet structure, and obtain the real-time dynamic strain response of the pile top plate body of the assembled pile-sheet structure under the action of vehicle load based on the global dynamic strain monitoring network; A pile group displacement identification module is used to obtain a global dynamic strain characteristic value based on the real-time response of the dynamic strain, draw a global dynamic strain characteristic value heat map based on the global dynamic strain characteristic value, determine the mutation point and singular point of the global dynamic strain characteristic value based on the global dynamic strain characteristic value heat map, and determine the location of the singular point, and use the location of the singular point as the pile group displacement identification result.

[0014] In another aspect, the present invention further provides an electronic device, comprising: a processor and a memory; The memory stores a computer-readable program executable by the processor; When the processor executes the computer-readable program, the steps in the method for monitoring the displacement of a pile group of a prefabricated pile-plate structure as described above are implemented.

[0015] On the other hand, the present invention also provides a computer-readable storage medium, which stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the method for monitoring the displacement of pile groups of prefabricated pile-plate structures as described above.

[0016] The beneficial effects of the present invention are as follows: a global dynamic strain monitoring network for pile groups of prefabricated pile-plate structures is constructed to realize the sensor network requirement of global coverage of route pile foundations, so as to achieve the purpose of real-time monitoring of global pile bodies, and based on the global dynamic strain monitoring network, a real-time response of the dynamic strain of the pile top plate body of the prefabricated pile-plate structure under the action of vehicle loads is obtained; based on the real-time response of the dynamic strain, a global dynamic strain eigenvalue is obtained, a global dynamic strain eigenvalue heat map is drawn based on the global dynamic strain eigenvalue, and based on the global dynamic strain eigenvalue heat map, mutation points and singular points of the global dynamic strain eigenvalue are determined, and the positions of the singular points are determined, and the positions of the singular points are used as the displacement identification results of the pile groups, and the displacement of the roadbed pile groups is identified by obtaining the dynamic strain changes of the pile top plate body of the prefabricated pile-plate structure under the action of vehicle loads, thereby improving the recognition accuracy of the displacement of the pile groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A flow chart of an embodiment of a method for monitoring the displacement of a pile group in a prefabricated pile-plate structure provided by the present invention; Figure 2 A schematic plan view of a pile group global dynamic strain monitoring network for a pile group displacement monitoring method for an assembled pile-plate structure provided by the present invention; Figure 3 A schematic elevation diagram of a pile group global dynamic strain monitoring network for a pile group displacement monitoring method for an assembled pile-plate structure provided by the present invention; Figure 4 A schematic diagram of the real-time response of dynamic strain of the method for monitoring the displacement of a pile group of an assembled pile-plate structure provided by the present invention; Figure 5 A schematic structural diagram of an embodiment of a pile group displacement monitoring device for an assembled pile-plate structure provided by the present invention; Figure 6 A schematic structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0019] The present invention discloses a method, device, equipment and medium for monitoring the displacement of pile groups of assembled pile-plate structures, which can be used in a computer. The method, equipment or computer-readable storage medium involved in the present invention can be integrated with the above-mentioned equipment or can be relatively independent.

[0020] A specific embodiment of the present invention discloses a method for monitoring the displacement of a pile group of a prefabricated pile-plate structure, which can be executed by a computer, and specifically by one or more processors of the computer. Figure 1 As shown, the method for monitoring the displacement of pile groups of the assembled pile-sheet structure includes: S101, constructing a global dynamic strain monitoring network for pile groups of the prefabricated pile-sheet structure, and obtaining a real-time dynamic strain response of a pile top plate body of the prefabricated pile-sheet structure under vehicle load based on the global dynamic strain monitoring network; S102. Obtain global dynamic strain eigenvalues ​​based on real-time response of dynamic strain, draw a global dynamic strain eigenvalue heat map based on the global dynamic strain eigenvalues, determine mutation points and singular points of the global dynamic strain eigenvalues ​​based on the global dynamic strain eigenvalue heat map, determine the locations of the singular points, and use the locations of the singular points as the pile group displacement identification results.

[0021] Among them, the information points required for monitoring the pile groups of the prefabricated pile-board structure are numerous and wide. By burying a grating array strain sensor cable at the bottom of the top plate of the prefabricated pile-board structure, the pile groups of the prefabricated pile-board structure are monitored in real time to provide high-precision monitoring data.

[0022] Compared with the prior art, the method for monitoring the displacement of pile groups of prefabricated pile-plate structures provided in the present embodiment constructs a global dynamic strain monitoring network for pile groups of prefabricated pile-plate structures, realizes the sensor network requirement of global coverage of the route pile foundation, and obtains the real-time response of the dynamic strain of the pile top plate body of the prefabricated pile-plate structure under the action of vehicle load based on the global dynamic strain monitoring network; obtains the global dynamic strain eigenvalue based on the real-time response of the dynamic strain, draws the global dynamic strain eigenvalue heat map based on the global dynamic strain eigenvalue, determines the mutation point and singular point of the global dynamic strain eigenvalue based on the global dynamic strain eigenvalue heat map, and determines the location of the singular point, and uses the location of the singular point as the pile group displacement identification result, identifies the displacement of the roadbed pile group by obtaining the dynamic strain change of the pile top plate body of the prefabricated pile-plate structure under the action of the vehicle load, and improves the identification accuracy of the pile group displacement.

[0023] In some embodiments, in step S101, a global dynamic strain monitoring network for a pile group of an assembled pile-plate structure is constructed, and based on the grating array strain sensing technology, a grating array strain sensing cable is buried at the bottom of the top plate of the assembled pile-plate structure to construct a global dynamic strain monitoring network for a pile group of an assembled pile-plate structure, wherein the pile group includes a plurality of pile foundations, specifically: the assembled pile-plate structure is buried along the driving direction at the bottom of the top plate of the assembled pile-plate structure, and the grating array strain sensing cable is divided into blocks according to the expansion joints of the assembled plate body of the structure, and the grating array strain sensing cable is arranged in a "mouth" shape, that is, a mouth-shaped grating array strain sensing cable is arranged in each expansion block, and the sensor cable expansion amount is reserved at the expansion joint between the top plates of the assembled pile-plate structure, so as to form a global coverage sensing network for pile groups, that is, a global dynamic strain monitoring network for pile groups. For a plan schematic diagram of the global dynamic strain monitoring network for pile groups, please refer to Figure 2 , the elevation diagram of the global dynamic strain monitoring network of pile groups, please refer to Figure 3 ,like Figure 2 As shown, the dotted circle represents the pile foundation, the number 6 represents the interval between the pile foundations, the number 12 represents that there are 12 cross-pile foundations, the numbers 0, 12, 24 and 48 represent the numbers of the pile foundations, and the grating array strain sensor cable is arranged in a "mouth" shape, as shown in FIG. Figure 3 As shown, the grating array strain sensor cable is buried at the bottom of the top plate of the assembled pile-plate structure.

[0024] The pile foundation position is obtained. Based on the pile foundation position and the global dynamic strain monitoring network, the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the pile foundation position is constructed. The number ID of the sensor unit of the grating array strain sensor cable is obtained. The pile foundation position is determined based on the number ID of the sensor unit, that is, each sensor unit of the grating array strain sensor cable corresponds to the pile foundation on the left and right sides, such as Figure 2 As shown, two longitudinal sensing cables are located in the middle of two pile foundations, respectively, to monitor two adjacent pile foundations on the left and right. The sensing unit of each grating array strain sensing cable corresponds to two pile foundations, and the pile foundations are numbered as , is the location number of the roadbed cross section. The longitudinal position of the roadbed is numbered. Through the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the position of the pile foundation, the pile foundation number corresponding to each sensor unit and the sensor data of the corresponding pile foundation can be recorded. When processing the data, the strain of different pile foundations under load can be analyzed based on the reading of the sensor unit, combined with the number and position information of the pile foundation, providing a basis for subsequent data collection, processing and analysis.

[0025] Based on the global dynamic strain monitoring network, the real-time dynamic strain response of the pile top plate of the assembled pile-plate structure under the vehicle load is obtained. Under the vehicle load, the global dynamic strain response of the sensor cable is extracted. The global dynamic strain response of the sensor cable is the real-time dynamic strain response of the pile top plate. The calculation formula of the real-time dynamic strain response is: , in, for The first time of prefabricated pile-slab structure under vehicle load The dynamic strain response value of each sensor unit, For the The sensing unit of the grating array strain sensor cable, for Periodic prefabricated pile-sheet structure The measured value of the dynamic strain of each sensor unit, for The measured strain values ​​of the prefabricated pile-sheet structure without vehicle load and the schematic diagram of its real-time dynamic strain response are shown in the figure. Figure 4 .

[0026] Based on the grating array strain sensing technology, a full-area dynamic strain monitoring network for pile groups of prefabricated pile-plate structures is constructed. The grating array of the full-area dynamic strain monitoring network for pile groups can integrate the advantages of various fiber optic sensors to meet the development trend of "large capacity, high precision, high density, long distance, and high reliability" of fiber optic sensing networks. Fiber grating sensors are small in size, resistant to electromagnetic interference, and resistant to high temperature and high pressure. They are easy to form large-scale sensing networks and can easily meet the full-area coverage of pile groups.

[0027] In some embodiments, in step S102, the global dynamic strain characteristic value is obtained based on the real-time response of the dynamic strain, and the global dynamic strain characteristic value is obtained based on the normalized real-time response of the dynamic strain and the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the pile foundation position, with the day as the uniform time unit. , normalize the real-time response of the global dynamic strain of the prefabricated pile-sheet structure to eliminate the random influence of vehicle loads. The normalized calculation formula is: , in, is the normalized real-time response of dynamic strain, is the cumulative dynamic strain response value of the grating array strain sensor cable, is the cumulative number of dynamic strain response values ​​of the grating array strain sensor cable; Based on the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the position of the pile foundation, the global dynamic strain eigenvalue of the uniform time unit T is obtained. The calculation formula of the global dynamic strain eigenvalue is: , in, is the global dynamic strain eigenvalue, is the statistical uniform time unit, is a uniform time unit, The pile foundation position of the prefabricated pile-sheet structure. is the number of the pile foundation, It is the normalized result of the real-time response of dynamic strain; The extraction of global dynamic strain eigenvalues ​​can help identify key patterns and trends in the data and provide a basis for subsequent displacement identification.

[0028] Based on the global dynamic strain eigenvalue, a global dynamic strain eigenvalue heat map is drawn. Based on the global dynamic strain eigenvalue heat map, the mutation points and singular points of the global dynamic strain eigenvalue are determined, and the locations of the singular points are determined. The locations of the singular points are used as the displacement identification results of the pile group. First, a eigenvalue database is constructed based on the global dynamic strain eigenvalue, and a global dynamic strain eigenvalue heat map is drawn based on the eigenvalue database. Secondly, based on the global dynamic strain eigenvalue heat map, the image similarity comparison is used to identify the mutation points of the time dimension and the singular points of the space dimension of the dynamic strain eigenvalue. Finally, after determining the mutation points of the time dimension and the singular points of the space dimension of the dynamic strain eigenvalue, the locations of the singular points are determined based on the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the pile foundation position, and the locations of the singular points are used as the deformation positions of the pile foundation.

[0029] In dynamic strain monitoring, the strain data of the pile foundation can be obtained in real time through the grating array strain sensor cable. These data reflect the changing trend of the pile foundation strain in the time dimension, and reveal the strain differences between different pile foundations in the space dimension. In order to identify the mutation points and singular points in these characteristic values, the image similarity comparison method is used to display the strain data at different time points in the form of images, and then the similarity comparison algorithm in image processing technology is used to compare the strain images at adjacent time points or in a specific time period. By calculating the similarity between the images, the mutation points of the strain characteristic values ​​in the time dimension can be identified, that is, the positions where the strain images change significantly compared with the previous and next time points; When comparing the strain data of different pile foundations in the spatial dimension, the strain data of different pile foundations are compared to identify singular points. These singular points are usually manifested as significant differences in the strain data of some pile foundations compared with the surrounding pile foundations, which may indicate that these pile foundations have abnormal deformation or potential safety hazards. Once the mutation points in the time dimension and the singular points in the spatial dimension are identified, the position of the pile foundation with abnormal deformation can be quickly located based on the mapping relationship between the grating array strain sensor cable and the pile foundation. This mapping relationship ensures that each sensor unit corresponds to a specific pile foundation, so the deformation of the pile foundation can be accurately determined based on the changes in the strain data; finally, based on the identified abnormally displaced pile foundation position, a positioning warning can be carried out.

[0030] In order to better implement the method for monitoring the displacement of pile groups of the assembled pile-sheet structure in the embodiment of the present invention, based on the method for monitoring the displacement of pile groups of the assembled pile-sheet structure, correspondingly, Figure 5 As shown, an embodiment of the present invention further provides a pile group displacement monitoring device of a prefabricated pile-plate structure, and the pile group displacement monitoring device 500 of the prefabricated pile-plate structure includes: The dynamic strain real-time response acquisition module 501 is used to construct a global dynamic strain monitoring network for pile groups of the assembled pile-sheet structure, and obtain the real-time dynamic strain response of the pile top plate body of the assembled pile-sheet structure under the action of vehicle load based on the global dynamic strain monitoring network; The pile group displacement identification module 502 is used to obtain the global dynamic strain eigenvalue based on the real-time response of the dynamic strain, draw the global dynamic strain eigenvalue heat map based on the global dynamic strain eigenvalue, determine the mutation point and singular point of the global dynamic strain eigenvalue based on the global dynamic strain eigenvalue heat map, and determine the location of the singular point, and use the location of the singular point as the pile group displacement identification result.

[0031] like Figure 6 As shown, the present invention also provides an electronic device 600 , which can be a computing device such as a mobile terminal, a desktop computer, a notebook, a palmtop computer, a server, etc. The electronic device 600 includes a processor 601 , a memory 602 , and a display 603 . Figure 6Only some components of the electronic device 600 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0032] In some embodiments, the memory 602 may be an internal storage unit of the electronic device 600, such as a hard disk or memory of the electronic device 600. In other embodiments, the memory 602 may also be an external storage device of the electronic device 600, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 600. Further, the memory 602 may also include both an internal storage unit of the electronic device 600 and an external storage device. The memory 602 is used to store application software and various data installed in the electronic device 600, such as program codes installed in the electronic device 600. The memory 602 may also be used to temporarily store data that has been output or is to be output. In one embodiment, the memory 602 stores a group pile displacement monitoring program of an assembled pile-plate structure, and the group pile displacement monitoring program of the assembled pile-plate structure can be executed by the processor 601, thereby realizing the group pile displacement monitoring method of the assembled pile-plate structure of each embodiment of the present invention.

[0033] In some embodiments, the processor 601 may be a central processing unit (CPU), a microprocessor or other data processing chip, which is used to run the program code or process data stored in the memory 602, such as a method for monitoring the displacement of pile groups of a prefabricated pile-plate structure.

[0034] In some embodiments, the display 603 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 603 is used to display identification information of the pile group displacement monitoring program of the assembled pile-plate structure and to display a visual user interface. The components 601-603 of the electronic device 600 communicate with each other via a system bus.

[0035] In some embodiments, when the processor 601 executes the pile group displacement monitoring program of the prefabricated pile-plate structure in the memory 602, the various steps in the pile group displacement monitoring method of the prefabricated pile-plate structure as described in the above embodiments are implemented. Since the pile group displacement monitoring method of the prefabricated pile-plate structure has been described in detail above, it will not be repeated here.

[0036] Accordingly, the present invention also provides a computer-readable storage medium, which is used to store computer-readable programs or instructions. When the program or instructions are executed by a processor, the steps or functions in the method for monitoring the displacement of a group of piles of an assembled pile-plate structure provided in the above-mentioned method embodiments can be implemented.

[0037] In summary, the method, device, equipment and medium for monitoring the displacement of pile groups of prefabricated pile-plate structures provided by the present invention construct a global dynamic strain monitoring network for pile groups of prefabricated pile-plate structures, and obtain the real-time response of the dynamic strain of the pile top plate body of the prefabricated pile-plate structure under the action of vehicle load based on the global dynamic strain monitoring network; obtain the global dynamic strain eigenvalue based on the real-time response of the dynamic strain, draw the global dynamic strain eigenvalue heat map based on the global dynamic strain eigenvalue, determine the mutation point and singular point of the global dynamic strain eigenvalue based on the global dynamic strain eigenvalue heat map, and determine the location of the singular point, and use the location of the singular point as the pile group displacement identification result, and identify the displacement of the roadbed pile group by obtaining the dynamic strain change of the pile top plate body of the prefabricated pile-plate structure under the action of vehicle load, thereby improving the identification accuracy of the pile group displacement.

[0038] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for monitoring the displacement of pile groups of an assembled pile-sheet structure, characterized in that: include: A global dynamic strain monitoring network for pile groups of the prefabricated pile-sheet structure is constructed, and a real-time dynamic strain response of a pile top plate body of the prefabricated pile-sheet structure under vehicle load is obtained based on the global dynamic strain monitoring network; Based on the real-time response of the dynamic strain, the global dynamic strain eigenvalue is obtained, and based on the global dynamic strain eigenvalue, a global dynamic strain eigenvalue heat map is drawn. Based on the global dynamic strain eigenvalue heat map, the mutation points and singular points of the global dynamic strain eigenvalue are determined, and the positions of the singular points are determined, and the positions of the singular points are used as the pile group displacement identification results.

2. The method for monitoring the displacement of pile groups of a prefabricated pile-sheet structure according to claim 1, characterized in that: The pile group includes a plurality of pile foundations, and the pile group global dynamic strain monitoring network for constructing the assembled pile-plate structure includes: Based on the grating array strain sensing technology, the grating array strain sensing cable is buried at the bottom of the top plate of the assembled pile-plate structure to construct a full-area dynamic strain monitoring network for the pile group of the assembled pile-plate structure; The pile foundation position is obtained, and a mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the pile foundation position is constructed based on the pile foundation position and the global dynamic strain monitoring network.

3. The method for monitoring the displacement of pile groups of a prefabricated pile-sheet structure according to claim 2, characterized in that: The calculation formula of the real-time response of dynamic strain is: ， in, for The first time of prefabricated pile-slab structure under vehicle load The dynamic strain response value of each sensor unit, For the The sensing unit of the grating array strain sensor cable, for Periodic prefabricated pile-sheet structure The measured value of the dynamic strain of each sensor unit, for Measured strain values ​​of prefabricated pile-sheet structure without vehicle load.

4. The method for monitoring the displacement of pile groups of a prefabricated pile-sheet structure according to claim 2, characterized in that: The obtaining of the global dynamic strain characteristic value based on the real-time response of the dynamic strain includes: Based on the normalized real-time response of dynamic strain and the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the position of the pile foundation, the global dynamic strain characteristic value is obtained.

5. The method for monitoring displacement of pile groups of a prefabricated pile-sheet structure according to claim 4, characterized in that: The calculation formula of the normalized dynamic strain real-time response is: ， in, is the normalized real-time response of dynamic strain, is the cumulative dynamic strain response value of the grating array strain sensor cable, It is the cumulative number of dynamic strain response values ​​of the grating array strain sensor cable.

6. The method for monitoring displacement of pile groups of a prefabricated pile-sheet structure according to claim 4, characterized in that: The calculation formula of the global dynamic strain eigenvalue is: ， in, is the global dynamic strain eigenvalue, is the statistical uniform time unit, is a uniform time unit, The pile foundation position of the prefabricated pile-sheet structure. is the number of the pile foundation, is the normalized result of the real-time response of dynamic strain, is the location number of the roadbed cross section. It is the longitudinal position number of the roadbed.

7. The method for monitoring the displacement of pile groups of a prefabricated pile-sheet structure according to claim 4, characterized in that: The method of drawing a global dynamic strain characteristic value heat map based on the global dynamic strain characteristic value, determining a mutation point and a singular point of the global dynamic strain characteristic value based on the global dynamic strain characteristic value heat map, and determining the location of the singular point, and using the location of the singular point as a pile group displacement identification result, includes: Building a characteristic value database based on the global dynamic strain characteristic value, and drawing a global dynamic strain characteristic value thermal map based on the characteristic value database; Based on the global dynamic strain eigenvalue heat map, the image similarity comparison is used to identify the mutation points in the time dimension and the singular points in the space dimension of the dynamic strain eigenvalue, and the location of the singular point is determined based on the mapping relationship between the number of each sensor unit in the grating array strain sensor cable and the position of the pile foundation, and the location of the singular point is used as the deformation position of the pile foundation.

8. A pile group displacement monitoring device for an assembled pile-plate structure, characterized in that: include: A dynamic strain real-time response acquisition module is used to construct a global dynamic strain monitoring network for pile groups of the assembled pile-sheet structure, and obtain the real-time dynamic strain response of the pile top plate body of the assembled pile-sheet structure under the action of vehicle load based on the global dynamic strain monitoring network; A pile group displacement identification module is used to obtain a global dynamic strain characteristic value based on the real-time response of the dynamic strain, draw a global dynamic strain characteristic value heat map based on the global dynamic strain characteristic value, determine the mutation point and singular point of the global dynamic strain characteristic value based on the global dynamic strain characteristic value heat map, and determine the location of the singular point, and use the location of the singular point as the pile group displacement identification result.

9. An electronic device, characterized in that: including memory and processor; The memory stores a computer-readable program executable by the processor; When the processor executes the computer-readable program, the steps of the method for monitoring the displacement of a pile group of a prefabricated pile-plate structure according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the steps in the method for monitoring the displacement of a pile group of an assembled pile-plate structure as described in any one of claims 1-7.

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