Grouting diffusion three-dimensional monitoring system and method and medium

Abstract

The invention provides a grouting diffusion three-dimensional monitoring system and method and a medium, and relates to the technical field of railway roadbeds, and the system comprises an acquisition module and a data processing module; the acquisition module is used for acquiring apparent resistivity corresponding to a grouting diffusion area in a railway roadbed in parallel; and the data processing module is connected with the acquisition module and is used for performing forward modeling and inversion according to a preset geoelectric model and the apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range. Thus, on one hand, the collection efficiency of apparent resistivity is improved, on the other hand, a three-dimensional apparent resistivity map can be obtained, three-dimensional real-time monitoring of the slurry flow path, the flow range, the spatial and temporal distribution and the occurrence state in the grouting process is achieved, the slurry diffusion condition is accurately and visually reflected, and the grouting quality is improved. And a basis is provided for grouting reinforcement mechanism research, technical development and scheme optimization.

Description

Technical Field

[0001] The present invention relates to the technical field of railway roadbed, in particular to a grouting diffusion three-dimensional monitoring system, method and medium. Background Art

[0002] With the rapid development of infrastructure construction, the construction of highway and railway tunnels, coal mine tunnels, subways, and hydropower chambers is becoming increasingly widespread. However, as shallow resources decrease and even become depleted, mining is proceeding at ever-deeper depths. Currently, an increasing number of tunnels are being built in high mountains. An increasing number of underground projects are located in harsh geological environments, such as deep burial depths, soft rock, and fault structures. This has led to a dramatic increase in the difficulty of controlling rock mass stability and a high incidence of engineering disasters.

[0003] Grouting reinforcement is an important technical measure to improve rock mass stability and ensure engineering safety. Grouting for water blocking is currently the primary technique for addressing sudden water inrush in geotechnical engineering. However, due to the current imperfect development of grouting technology, grouting effectiveness cannot be guaranteed. A prominent issue is that due to the numerous inaccessible, through-hole fractures in the rock mass, information about grout diffusion and its extent during the grouting process is difficult to obtain, resulting in a very reactive grouting strategy. For example, when grouting in heavily fractured surrounding rock, the grouting pressure often remains very low from the beginning to the end, with the grouting only diffusing along the dominant channel. Sometimes, the grouting only spreads in one direction, extending 10 to 20 meters beyond the grouting hole, while no grout fills the surrounding rock fractures in other directions. Under these conditions, despite the large grouting volume, the overall filling rate of the surrounding rock fractures is very low, preventing the formation of a continuous reinforced zone within the surrounding rock, failing to achieve the desired reinforcement effect, and resulting in wasted material. Therefore, monitoring grouting diffusion during the grouting process is particularly important.

[0004] At present, the main methods for monitoring grouting diffusion are electrical detection and cross-hole acoustic detection. The above two methods use serial acquisition and can only collect one electrode at a time. The time to collect one electrode is 1 second. In order to reduce interference, after collecting one electrode, there will be an interval of about 1 second before starting to collect the next electrode, so the time to fully collect one electrode is 2 seconds. In this way, it takes a long time to collect all the electrodes in the grouting diffusion area, the detection efficiency is low, and real-time monitoring cannot be achieved. At the same time, the above two methods detect several measuring lines in the grouting diffusion area one by one to obtain a two-dimensional profile, which cannot achieve three-dimensional monitoring. In addition, the above two methods only perform detection after the grouting is completed, and cannot monitor the grouting process.

[0005] In response to the problems of the prior art, the present invention provides a three-dimensional monitoring system, method and medium for grouting diffusion. Summary of the Invention

[0006] In view of the problems of the current existing technology, the present invention provides a grouting diffusion three-dimensional monitoring system, method and medium, the system includes: an acquisition module and a data processing module;

[0007] The acquisition module is used to collect the apparent resistivity corresponding to the grouting diffusion area in the railway roadbed in parallel;

[0008] The data processing module is connected to the acquisition module and is used to perform forward modeling and inversion according to a preset geoelectric model and the apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range.

[0009] According to one embodiment of the present invention, the acquisition module includes a parallel electrical instrument and a plurality of electrodes;

[0010] The parallel electrical instrument is used to apply voltage to the plurality of electrodes to generate an electric field; and calculate a potential difference based on the potentials received from the plurality of electrodes to determine the apparent resistivity in the grouting diffusion area based on the potential difference;

[0011] The electrodes are connected to the parallel electrical method instrument and are arranged in the grouting diffusion area and the depth direction of the grouting hole, and are used to generate potential under the electric field and send the potential to the parallel electrical method instrument.

[0012] According to one embodiment of the present invention, the data processing module includes: a data preprocessing module; the data preprocessing module includes: a processing submodule and a correction submodule;

[0013] The processing submodule is used to remove false points and mutation points in the apparent resistivity and perform filtering processing;

[0014] The correction submodule is used to correct the positions of the electrodes.

[0015] According to one embodiment of the present invention, the data processing module further comprises: a forward modeling module and an inversion module;

[0016] The forward modeling module is used to perform forward modeling on the geoelectric model to obtain theoretical apparent resistivity;

[0017] The inversion module is connected to the forward modeling module and is used to invert the geoelectric model according to the theoretical apparent resistivity and the apparent resistivity after filtering to obtain the three-dimensional apparent resistivity map.

[0018] According to one embodiment of the present invention, the forward modeling module includes: an acquisition submodule, a determination submodule, a first calculation submodule and a second calculation submodule connected in sequence;

[0019] The acquisition submodule is used to obtain the wave numbers of the plurality of electrodes in the geoelectric model and calculate the stiffness matrix according to the wave numbers;

[0020] The determining submodule is configured to determine the Fourier transform of the grid nodes in the geoelectric model according to the stiffness matrix;

[0021] The first calculation submodule is configured to perform an inverse Fourier transform on the grid node when the wave number is the last wave number to obtain a target voltage at the grid node;

[0022] The second calculation submodule is configured to calculate the theoretical apparent resistivity according to the target voltage at the grid node.

[0023] According to one embodiment of the present invention, the inversion module includes: a third calculation submodule, a correction submodule and an output submodule;

[0024] The third calculation submodule is used to calculate the error between the theoretical apparent resistivity and the apparent resistivity after filtering;

[0025] The correction submodule is connected to the third calculation submodule, and is used to correct the geoelectric model if the error is greater than the model correction value, and perform iterative inversion until the error is less than the model correction value;

[0026] The output submodule is connected to the third calculation submodule, and is used to output the three-dimensional apparent resistivity map if the error is less than the model correction value.

[0027] According to one embodiment of the present invention, the correction submodule includes: a fourth calculation submodule, which is used to calculate the error posterior probability based on the error, and determine whether the grid nodes in the geoelectric model can be merged based on the error posterior probability and the merging threshold to correct the geoelectric model.

[0028] According to one embodiment of the present invention, the system further includes: a power supply module, configured to supply power to the acquisition module and the data processing module.

[0029] According to another aspect of the present invention, a three-dimensional monitoring method for grouting diffusion is provided, which is performed by the system as described in any one of the above items, and the method includes:

[0030] Parallel acquisition of apparent resistivity corresponding to the grouting diffusion area in the railway subgrade;

[0031] Forward modeling and inversion are performed based on a preset geoelectric model and the apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range.

[0032] According to another aspect of the present invention, a storage medium is provided, which includes a series of instructions for executing the method steps as described in any one of the above.

[0033] The present invention provides a three-dimensional monitoring system, method, and medium for grouting diffusion, which have the following advantages over the existing technology:

[0034] The present invention consists of an acquisition module and a data processing module. The acquisition module concurrently collects the apparent resistivity corresponding to the grouting diffusion area in the railway subgrade. The data processing module performs forward and inversion modeling based on a preset geoelectrical model and the apparent resistivity, generating a three-dimensional apparent resistivity map that characterizes the grouting diffusion range. This not only improves the efficiency of apparent resistivity acquisition, but also enables the generation of a three-dimensional apparent resistivity map, enabling real-time three-dimensional monitoring of the slurry flow path, flow range, spatiotemporal distribution, and occurrence state during the grouting process. This accurately and intuitively reflects the slurry diffusion situation, providing a basis for grouting reinforcement mechanism research, technology development, and solution optimization.

[0035] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0037] Figure 1 A schematic diagram of a grouting diffusion three-dimensional monitoring system according to an embodiment of the present invention is shown;

[0038] Figure 2 shows a schematic diagram of an electrode according to one embodiment of the present invention;

[0039] FIG3( a ) shows a schematic diagram of a three-dimensional apparent resistivity map according to one embodiment of the present invention;

[0040] FIG3( b ) shows a front view of a three-dimensional apparent resistivity map according to an embodiment of the present invention;

[0041] FIG3( c ) shows a top view of a three-dimensional apparent resistivity map according to one embodiment of the present invention;

[0042] FIG3( d ) shows a side view of a three-dimensional apparent resistivity map according to one embodiment of the present invention;

[0043] Figure 4A flow chart of a forward modeling module according to one embodiment of the present invention is shown;

[0044] Figure 5 shows a flow chart of an inversion module according to one embodiment of the present invention;

[0045] Figure 6 A flow chart of a three-dimensional monitoring method for grouting diffusion according to an embodiment of the present invention is shown.

[0046] In the accompanying drawings, the same reference numerals are used for the same parts. In addition, the accompanying drawings are not drawn according to the actual scale.

[0047] The meanings of the reference numerals in the accompanying drawings are as follows:

[0048] 10——Acquisition module 20——Data processing module DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions and advantages of the present invention more clear, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0050] The prior art (CN112798476A) describes a system and method for monitoring the diffusion range of grouting in fractured rock masses. The system includes a computer, a main control unit, a transmitter, a power supply, a first transmitting electrode, a second transmitting electrode, and several measuring electrodes, wherein: the first transmitting electrode, the second transmitting electrode, and the several measuring electrodes are arranged in sequence on an electrode arrangement reference line, and the several measuring electrodes are arranged at equal intervals; the first transmitting electrode and the second transmitting electrode are electrically connected to the transmitter, the power supply is electrically connected to the transmitter, the several measuring electrodes are electrically connected to the main control unit, the main control unit is electrically connected to the transmitter and the computer, and the computer is electrically connected to the main control unit. The present invention provides a solution for identifying fractures (or holes) in rock masses and monitoring the flow path and diffusion range of slurry in the rock mass. By adjusting the electrode arrangement position, monitoring of the entire area and different depths can be completed, solving the problem of difficulty in measuring the grouting range. This method cannot obtain a three-dimensional apparent resistivity map.

[0051] In view of the above-mentioned defects in the prior art, the present invention provides a three-dimensional monitoring system, method and medium for grouting diffusion. Figure 1 A schematic diagram of a grouting diffusion three-dimensional monitoring system according to an embodiment of the present invention is shown, the system comprising: an acquisition module 10 and a data processing module 20;

[0052] The acquisition module 10 is used to concurrently acquire the apparent resistivity corresponding to the grouting diffusion area in the railway subgrade;

[0053] The data processing module 20 is connected to the acquisition module 10 and is used to perform forward modeling and inversion according to a preset geoelectric model and apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range.

[0054] For example, the grouting diffusion area can be determined based on site conditions, construction layout, grouting hole locations, etc.

[0055] The acquisition module 10 can be connected to the data processing module 20 via a network module to transmit the apparent resistivity to the data processing module 20. This method is applicable to monitoring of railway subgrade and other grouting projects.

[0056] The present invention consists of an acquisition module and a data processing module. The acquisition module concurrently collects the apparent resistivity corresponding to the grouting diffusion area in the railway subgrade. The data processing module performs forward and inversion modeling based on a preset geoelectrical model and the apparent resistivity, generating a three-dimensional apparent resistivity map that characterizes the grouting diffusion range. This not only improves the efficiency of apparent resistivity acquisition, but also enables the generation of a three-dimensional apparent resistivity map, enabling real-time three-dimensional monitoring of the slurry flow path, flow range, spatiotemporal distribution, and occurrence state during the grouting process. This accurately and intuitively reflects the slurry diffusion situation, providing a basis for grouting reinforcement mechanism research, technology development, and solution optimization.

[0057] In a possible embodiment, the acquisition module 10 includes a parallel electrical instrument and a plurality of electrodes;

[0058] A parallel electrical method instrument for applying voltage to a plurality of electrodes to generate an electric field; and calculating a potential difference based on the potentials received from the plurality of electrodes to determine the apparent resistivity in the grout diffusion area based on the potential difference;

[0059] Several electrodes are connected to the parallel electrical method instrument and are arranged in the grouting diffusion area and the depth direction of the grouting hole to generate potential under the electric field and send the potential to the parallel electrical method instrument.

[0060] For example, a parallel electrometer can be connected to a plurality of electrodes via a cable. The parallel electrometer can apply an AC voltage to the plurality of electrodes to generate a current. For example, the parallel electrometer can be designed to have 64 channels or 128 channels.

[0061] Wherein, a measuring line can be arranged in the grouting diffusion area, and an electrode is set on the measuring line to collect the potential corresponding to the grouting diffusion area. For example, the measuring line can be randomly arranged according to the position of the grouting hole in the grouting diffusion area. Figure 2 As shown, multiple electrodes can be arranged in the depth direction of the grouting hole. In addition, the electrodes do not need to be arranged at equal intervals. After the arrangement is completed, the spatial position and spacing data of the electrodes need to be recorded.

[0062] After the electrode sends a potential to the parallel electrical analyzer, the potential difference can be calculated. Then, the apparent resistivity at the electrode can be obtained based on the potential difference and the spatial position of the electrode.

[0063] Using the above method, one set of data can be collected from any two transmitting electrodes. If a total of 10 electrodes are deployed, 45 sets of data can be collected, completing one round of data collection. Furthermore, before grouting begins, one round of data collection is completed to understand the roadbed conditions before grouting. After grouting begins, data collection continues, collecting multiple rounds of data to observe the diffusion process. After grouting is completed, one round of data collection is completed to understand the grouting effect.

[0064] Thus, the acquisition module 10 includes a parallel electrical instrument and a plurality of electrodes, which realizes parallel data acquisition, improves the acquisition efficiency of apparent resistivity, and does not require regular electrode layout, which improves the simplicity of layout.

[0065] In a possible embodiment, the data processing module 20 includes: a data preprocessing module; the data preprocessing module includes: a processing submodule and a correction submodule;

[0066] The processing submodule is used to remove false points and mutation points in the apparent resistivity and perform filtering processing;

[0067] The correction submodule is used to correct the positions of several electrodes.

[0068] Among them, considering the reasons such as poor electrode grounding or other interference, some false points and mutation points often appear, which in turn cause abnormalities in the 3D apparent resistivity map. Therefore, false points and mutation points in the apparent resistivity must be eliminated. After that, the apparent resistivity after elimination is filtered.

[0069] Furthermore, the accuracy of electrode placement directly affects the spatial correspondence between the injected current and the measured voltage. Inaccurate electrode placement can lead to data deviation, reduce data reliability, and even affect the overall monitoring results. Therefore, after the electrodes are arranged, RTK is required to measure the actual spatial position of each electrode in turn to calibrate the spatial position of each electrode.

[0070] Thus, the data processing module 20 includes: a processing submodule and a correction submodule to remove false points and mutation points in the apparent resistivity and correct the electrode positions, thereby improving the reliability of the apparent resistivity.

[0071] In a possible embodiment, the data processing module 20 further includes: a forward modeling module and an inversion module;

[0072] Forward modeling module, used to perform forward modeling on the geoelectric model to obtain the theoretical apparent resistivity;

[0073] The inversion module is connected to the forward modeling module and is used to invert the geoelectric model based on the theoretical apparent resistivity and the apparent resistivity after filtering to obtain a three-dimensional apparent resistivity map.

[0074] For example, a geoelectrical model can be established based on the grouting diffusion area of ​​a railway subgrade. The finite element method can then be used to forward model the geoelectrical model, using the variational principle and the interpolation method to obtain the theoretical apparent resistivity. The geoelectrical model can then be inverted using the quasi-Newton method or the least squares method based on the theoretical apparent resistivity and the filtered apparent resistivity, resulting in a three-dimensional apparent resistivity map, as shown in Figure 3(a). Figures 3(b), 3(c), and 3(d) show the front, top, and side views of the three-dimensional apparent resistivity map.

[0075] Thus, the data processing module 20 includes a forward modeling module and an inversion module, which can perform forward modeling and inversion according to the geoelectric model and apparent resistivity to obtain a three-dimensional apparent resistivity map, thereby improving the accuracy and efficiency of the three-dimensional apparent resistivity map.

[0076] In a possible embodiment, the forward modeling module includes: an acquisition submodule, a determination submodule, a first calculation submodule, and a second calculation submodule connected in sequence;

[0077] The acquisition submodule is used to obtain the wave numbers of several electrodes in the geoelectric model and calculate the stiffness matrix based on the wave numbers;

[0078] a determination submodule for determining the Fourier transform of the grid nodes in the geoelectric model based on the stiffness matrix;

[0079] A first calculation submodule is configured to perform an inverse Fourier transform on the grid node when the wave number is the last wave number, so as to obtain a target voltage at the grid node;

[0080] The second calculation submodule is used to calculate the theoretical apparent resistivity according to the target voltage at the grid node.

[0081] For example, the forward modeling module may further include: a grid division module for performing grid division on the geoelectric model. Figure 4 As shown, the target voltage at each grid node in the geoelectric model can be obtained, so as to calculate the theoretical apparent resistivity based on the existing formula.

[0082] Thus, the forward modeling module includes: an acquisition submodule, a determination submodule, a first calculation submodule and a second calculation submodule, which can realize forward modeling of the geoelectric model and obtain the theoretical apparent resistivity, providing a basis for generating a three-dimensional apparent resistivity map.

[0083] In a possible embodiment, the inversion module includes: a third calculation submodule, a correction submodule, and an output submodule;

[0084] The third calculation submodule is used to calculate the error between the theoretical apparent resistivity and the apparent resistivity after filtering;

[0085] a correction submodule, connected to the third calculation submodule, for correcting the geoelectric model if the error is greater than the model correction value, and performing iterative inversion until the error is less than the model correction value;

[0086] The output submodule is connected to the third calculation submodule and is used to output a three-dimensional apparent resistivity map if the error is less than the model correction value.

[0087] For example, the model correction value can be determined according to the actual application scenario, and the present invention does not limit it here. Among them, the inversion parameters can be selected in the inversion module, such as: damping coefficient, number of iterations, convergence limit. Then, as Figure 5 As shown in Figure 1, the third calculation submodule uses the least squares method to calculate the error between the theoretical apparent resistivity and the filtered apparent resistivity. If the error is greater than the model correction value, the correction submodule adjusts the parameters of the geoelectrical model until the error is less than the model correction value. The output submodule then generates a 3D apparent resistivity map based on the theoretical apparent resistivity.

[0088] Thus, the inversion module includes: a third calculation submodule, a correction submodule and an output submodule, so as to minimize the error between the theoretical apparent resistivity and the apparent resistivity, thereby improving the accuracy of the three-dimensional apparent resistivity map.

[0089] In a possible embodiment, the correction submodule includes: a fourth calculation submodule, which is used to calculate the error posterior probability based on the error, and determine whether the grid nodes in the geoelectric model can be merged based on the error posterior probability and the merging threshold to correct the geoelectric model.

[0090] For example, the merging threshold can be determined based on the actual application scenario, which is not limited in the present invention. In addition, the fourth calculation submodule can calculate the posterior probability of error based on the Bayesian estimation method, and then determine whether the posterior probability of error is greater than the merging threshold. If the posterior probability of error is greater than the merging threshold, the grid nodes in the geoelectrical model are merged or the grid nodes with the posterior probability of error greater than the merging threshold are repartitioned to correct the geoelectrical model. If the posterior probability of error is not greater than the merging threshold, the grid nodes in the geoelectrical model are not merged.

[0091] Thus, the correction submodule includes: a fourth calculation submodule, which can correct the geoelectric model, improve the accuracy of the geoelectric model, and provide a basis for the generation of a three-dimensional apparent resistivity map.

[0092] In a possible embodiment, the system further includes: a power supply module, configured to supply power to the acquisition module 10 and the data processing module 20 .

[0093] The power supply module can be solar energy or mains electricity to ensure long-term uninterrupted monitoring, thereby ensuring the stability of the acquisition module 10 and the data processing module 20.

[0094] According to another aspect of the present invention, a three-dimensional monitoring method for grouting diffusion is provided, which comprises executing a three-dimensional monitoring system for grouting diffusion. Figure 6 A flow chart of a method for three-dimensional monitoring of grouting diffusion according to an embodiment of the present invention is shown, the method comprising:

[0095] S101, parallel acquisition of apparent resistivity corresponding to the grouting diffusion area in the railway subgrade;

[0096] S102 , forward modeling and inversion are performed based on a preset geoelectric model and apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range.

[0097] The three-dimensional grouting diffusion monitoring method provided by the present invention can also be used in conjunction with a computer-readable storage medium having a computer program stored thereon. The computer program is executed to implement the three-dimensional grouting diffusion monitoring method. The computer program is capable of executing computer instructions, which include computer program code. The computer program code can be in source code form, object code form, executable file, or some intermediate form.

[0098] Computer-readable storage media may include: any entity or device that can carry computer program code, recording media, USB flash drives, mobile hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0099] It should be noted that the content contained in computer-readable storage media can be appropriately increased or decreased according to the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practices, computer-readable storage media do not include electrical carrier signals and telecommunications signals.

[0100] Example 1: A water seepage experiment was conducted in the central area of ​​a site (site size 4m × 2m) to simulate the process of slurry injection into the rock and soil. Parallel acquisition was performed using 30 channels; two survey lines were arranged for 3D acquisition; the electrodes on the survey lines were spaced 0.5m apart; and the survey lines were spaced 2m apart. The resulting 3D apparent resistivity map is shown in Figure 3(a) and in Figures 3(b), (c), and (d), with the front, top, and side views of the maps.

[0101] In summary, the present invention provides a three-dimensional monitoring system, method, and medium for grouting diffusion, which have the following advantages over the prior art:

[0102] The present invention consists of an acquisition module and a data processing module. The acquisition module concurrently collects the apparent resistivity corresponding to the grouting diffusion area in the railway subgrade. The data processing module performs forward and inversion modeling based on a preset geoelectrical model and the apparent resistivity, generating a three-dimensional apparent resistivity map that characterizes the grouting diffusion range. This not only improves the efficiency of apparent resistivity acquisition, but also enables the generation of a three-dimensional apparent resistivity map, enabling real-time three-dimensional monitoring of the slurry flow path, flow range, spatiotemporal distribution, and occurrence state during the grouting process. This accurately and intuitively reflects the slurry diffusion situation, providing a basis for grouting reinforcement mechanism research, technology development, and solution optimization.

[0103] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should extend to equivalent substitutions of these features understood by those skilled in the relevant art. It should also be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting.

[0104] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0105] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0106] Certain terms are used throughout this application document to indicate specific system components. As will be appreciated by those skilled in the art, different names may be used to indicate the same component, and thus this application document is not intended to distinguish between components that are only different in name but not in function. In this application document, the terms "comprise," "include," and "have" are used in an open format and should therefore be interpreted as meaning "including, but not limited to...". In addition, the terms "substantially," "substantially," or "approximately" that may be used herein refer to industry-accepted tolerances for the corresponding terms. The term "coupling," as used herein, includes direct coupling and indirect coupling via another component, element, circuit, or module, wherein for indirect coupling, the intervening component, element, circuit, or module does not change the information of the signal but can adjust its current level, voltage level, and / or power level. Inferred coupling (e.g., one element is coupled to another element by inference) includes direct and indirect coupling between two elements in the same manner as "coupling."

[0107] References in this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Therefore, appearances of the phrases "one embodiment" or "an embodiment" in various places throughout this specification do not necessarily refer to the same embodiment.

[0108] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

[0109] Although the embodiments disclosed herein are as described above, the contents described herein are merely embodiments for facilitating understanding of the present invention and are not intended to limit the present invention. Any person skilled in the art of the present invention may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed herein. However, the scope of patent protection of the present invention shall still be subject to the scope defined by the appended claims.

Claims

1. A three-dimensional monitoring system for grouting diffusion, characterized in that: The system includes: an acquisition module and a data processing module; The acquisition module is used to collect the apparent resistivity corresponding to the grouting diffusion area in the railway roadbed in parallel; The data processing module is connected to the acquisition module and is used to perform forward modeling and inversion according to a preset geoelectric model and the apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range.

2. The system according to claim 1, wherein The acquisition module includes a parallel electrical instrument and a plurality of electrodes; The parallel electrical method instrument is used to apply voltage to the plurality of electrodes to generate an electric field; and calculating a potential difference based on the potentials received from a plurality of said electrodes to determine the apparent resistivity in said grout diffusion area based on said potential difference; The electrodes are connected to the parallel electrical method instrument and are arranged in the grouting diffusion area and the depth direction of the grouting hole, and are used to generate potential under the electric field and send the potential to the parallel electrical method instrument.

3. The system according to claim 2, wherein: The data processing module includes: a data preprocessing module; the data preprocessing module includes: a processing submodule and a correction submodule; The processing submodule is used to remove false points and mutation points in the apparent resistivity and perform filtering processing; The correction submodule is used to correct the positions of the electrodes.

4. The system according to claim 3, wherein: The data processing module also includes: a forward modeling module and an inversion module; The forward modeling module is used to perform forward modeling on the geoelectric model to obtain theoretical apparent resistivity; The inversion module is connected to the forward modeling module and is used to invert the geoelectric model according to the theoretical apparent resistivity and the apparent resistivity after filtering to obtain the three-dimensional apparent resistivity map.

5. The system according to claim 4, wherein: The forward modeling module includes: an acquisition submodule, a determination submodule, a first calculation submodule and a second calculation submodule connected in sequence; The acquisition submodule is used to obtain the wave numbers of the plurality of electrodes in the geoelectric model and calculate the stiffness matrix according to the wave numbers; The determining submodule is configured to determine the Fourier transform of the grid nodes in the geoelectric model according to the stiffness matrix; The first calculation submodule is configured to perform an inverse Fourier transform on the grid node when the wave number is the last wave number to obtain a target voltage at the grid node; The second calculation submodule is configured to calculate the theoretical apparent resistivity according to the target voltage at the grid node.

6. The system according to claim 5, wherein: The inversion module includes: a third calculation submodule, a correction submodule and an output submodule; The third calculation submodule is used to calculate the error between the theoretical apparent resistivity and the apparent resistivity after filtering; The correction submodule is connected to the third calculation submodule, and is used to correct the geoelectric model if the error is greater than the model correction value, and perform iterative inversion until the error is less than the model correction value; The output submodule is connected to the third calculation submodule, and is used to output the three-dimensional apparent resistivity map if the error is less than the model correction value.

7. The system according to claim 6, wherein: The correction submodule includes: a fourth calculation submodule, which is used to calculate the error posterior probability based on the error, and determine whether the grid nodes in the geoelectric model can be merged based on the error posterior probability and a merging threshold to correct the geoelectric model.

8. The system according to any one of claims 1 to 7, wherein: The system further includes: a power supply module, configured to supply power to the acquisition module and the data processing module.

9. A three-dimensional monitoring method for grouting diffusion, characterized in that: Executed by the system according to any one of claims 1 to 8, the method comprises: Parallel acquisition of apparent resistivity corresponding to the grouting diffusion area in the railway subgrade; Forward modeling and inversion are performed based on a preset geoelectric model and the apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range.

10. A storage medium, characterized in that: It comprises a series of instructions for executing the method steps as claimed in claim 9.

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