A method, system, medium and equipment for detecting grout vein distribution after grouting of rock and soil

Abstract

The present invention relates to the technical field of grouting effect detection, and discloses a method, system, medium and equipment for detecting grout vein distribution after grouting of rock and soil bodies, including: drawing wave velocity contour lines in three-dimensional space for the grouting area before and after grouting; comparing the wave velocity contour lines before and after grouting, obtaining the wave velocity abnormal area, and then inverting to form a slurry three-dimensional distribution model according to the wave velocity abnormal area; wherein, the drawing step of the wave velocity contour lines in three-dimensional space includes: calculating the wave velocity through the coordinate difference and time difference between the transmitter and the receiver, and establishing a three-dimensional wave velocity vector, discretizing the grouting area into equidistant wave velocity points, using the distance from the wave velocity point to the straight line where the wave velocity three-dimensional vector is located as a weighting factor, weighting and distributing the wave velocities in different directions, obtaining the wave velocity corresponding to each wave velocity point, and drawing the wave velocity contour lines in three-dimensional space. It can realize three-dimensional imaging detection of grouting effect, and has the advantages of wide coverage area and high detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of grouting effect detection, and in particular to a method, system, medium and equipment for detecting grout vein distribution after grouting of a rock and soil body. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Grouting technology refers to a method of improving the physical and mechanical properties of rock and soil by injecting a cemented and high-strength slurry into the cracks or cavities of rock and soil layers through penetration, replacement, filling, compaction, splitting, etc.

[0004] Grouting in tunnels, roadways, overburden, etc. can improve the bearing strength, waterproof and anti-seepage properties of rock and soil. After the grouting is completed, the grouting effect is evaluated by inspecting the slurry diffusion range, grouting density, etc. to determine whether it has fully penetrated into the target stratum position and whether the stability and bearing capacity of the rock and soil meet the standards, which is extremely important for ensuring the safety and stability of geotechnical engineering.

[0005] The commonly used detection methods at this stage are mainly:

[0006] Water pressure inspection method and water volume comparison method, etc., these methods only compare the rock and soil permeability parameters, water inflow and other parameters before and after grouting to judge the grouting quality and effect, which is difficult to form an intuitive grouting effect;

[0007] The sampling inspection method and the drilling detection method are to judge the filling and cementation degree of the slurry in the stratum voids by drilling and coring, observing the distribution of slurry in the core or hole wall, and the evaluation of grouting effect is somewhat subjective;

[0008] Electronic detection methods such as radio wave perspective and transient electromagnetic can identify abnormal grouting areas based on changes in grouting material parameters, and use this to judge the quality of grouting; acoustic wave testing methods such as seismic wave method use the reflection and refraction of seismic waves to obtain depth migration images of longitudinal and transverse waves. This type of method can identify the diffusion of slurry in a certain area, but the detection accuracy is limited and it is difficult to identify the three-dimensional distribution of slurry in the complete grouting area.

[0009] Therefore, it is difficult for the existing technology to carry out fine detection of the three-dimensional distribution effect of the slurry and the flow conditions of the slurry veins. Therefore, it is urgent to develop and design a high-efficiency and high-precision three-dimensional detection method for grouting effects to realize three-dimensional detection of grouting effects. Summary of the invention

[0010] In order to solve the above problems, the present invention provides a method, system, medium and equipment for detecting slurry vein distribution after grouting of rock and soil bodies. Based on the elastic wave method, the longitudinal wave velocity values ​​of elastic waves in different directions of the complete grouting section are detected (all the following wave velocities belong to longitudinal wave velocities unless otherwise specified), which can realize full-section detection of the grouting area, obtain the three-dimensional wave velocity field of the grouting area by inversion, determine the slurry diffusion range according to the range of the wave velocity anomaly area, and realize three-dimensional imaging detection of the grouting effect, and has the advantages of wide coverage area and high detection accuracy.

[0011] In order to achieve the above object, the present invention adopts the following technical solution:

[0012] A first aspect of the present invention provides a method for detecting grout vein distribution after grouting of a rock mass, comprising:

[0013] Before and after grouting, wave velocity contours in three-dimensional space are drawn for the grouting area;

[0014] Comparing the velocity contours before and after grouting, after obtaining the velocity anomaly area, a 3D slurry distribution model is formed based on the inversion of the velocity anomaly area.

[0015] Among them, the steps of drawing wave velocity contour lines in three-dimensional space include: obtaining the coordinates of each transmitter and the time of transmitting elastic waves, as well as the coordinates of each receiver and the time of receiving elastic waves; calculating the wave velocity through the coordinate difference and time difference between the transmitter and the receiver, and establishing a three-dimensional wave velocity vector; based on the three-dimensional wave velocity vector, discretizing the grouting area into equidistant wave velocity points, using the distance from the wave velocity point to the straight line where the three-dimensional wave velocity vector is located as a weighting factor, weighting and distributing the wave velocities in different directions, obtaining the wave velocity corresponding to each wave velocity point, and drawing the wave velocity contour lines in three-dimensional space according to the wave velocity corresponding to each wave velocity point.

[0016] Further, the wave speed is defined as: ;in, represents the wave speed from the i-th transmitter to the j-th receiver, ( x i , y i , z i ) represents the three-dimensional coordinates of the i-th emitter, ( x j , y j , z j ) represents the three-dimensional coordinates of the jth receiver, t 0,i represents the time when the i-th transmitter emits the elastic wave, t ij It represents the time when the j-th receiver receives the elastic wave emitted by the i-th transmitter.

[0017] Furthermore, the wave velocity three-dimensional vector is expressed as: ;in, represents the wave speed from the i-th transmitter to the j-th receiver, A i represents the three-dimensional coordinates of the i-th emitter, B j represents the three-dimensional coordinates of the jth receiver.

[0018] Furthermore, the wave speed corresponding to the wave speed point is expressed as: ;in, is the weight calculated based on the distance from the wave velocity point to the straight line where the wave velocity three-dimensional vector is located, represents the wave speed between the i-th transmitter and the j-th receiver.

[0019] Furthermore, the distance from the wave velocity point to the straight line where the wave velocity three-dimensional vector is located is expressed as: ;in,( x i , y i , z i ) represents the three-dimensional coordinates of the i-th emitter, ( x k , y k , z k ) represents the three-dimensional coordinates of the wave velocity point, l ij , m ij and n ij It is the direction vector of the straight line where the three-dimensional wave velocity vector lies.

[0020] Furthermore, drilling is performed in the surrounding rock at the edge of the non-grouting area, drilling two or more holes for elastic wave transmitter devices, and drilling two or more holes for elastic wave receiver devices; assembling one or more transmitters in each hole for elastic wave transmitter devices, assembling one or more transmitters in each hole for elastic wave receiver devices, and N Each transmitter should be equipped with N +2 more receivers.

[0021] Furthermore, all the elastic wave transmitter device holes and all the elastic wave receiver device holes are not in the same plane.

[0022] A second aspect of the present invention provides a grout vein distribution detection system after grouting of a rock mass, comprising:

[0023] A wave velocity contour drawing module, which is configured to: draw wave velocity contours in three-dimensional space for the grouting area before and after grouting;

[0024] An inversion module is configured to: compare the wave velocity contours before and after grouting, obtain the wave velocity abnormal area, and then invert to form a slurry three-dimensional distribution model according to the wave velocity abnormal area;

[0025] Among them, the steps of drawing wave velocity contour lines in three-dimensional space include: obtaining the coordinates of each transmitter and the time of transmitting elastic waves, as well as the coordinates of each receiver and the time of receiving elastic waves; calculating the wave velocity through the coordinate difference and time difference between the transmitter and the receiver, and establishing a three-dimensional wave velocity vector; based on the three-dimensional wave velocity vector, discretizing the grouting area into equidistant wave velocity points, using the distance from the wave velocity point to the straight line where the three-dimensional wave velocity vector is located as a weighting factor, weighting and distributing the wave velocities in different directions, obtaining the wave velocity corresponding to each wave velocity point, and drawing the wave velocity contour lines in three-dimensional space according to the wave velocity corresponding to each wave velocity point.

[0026] The third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor and implements the steps of a method for detecting slurry vein distribution after grouting of a rock mass as described above when the program is executed by the processor.

[0027] The fourth aspect of the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the program, the steps in the method for detecting slurry vein distribution after grouting of a rock mass as described above are implemented.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a method for detecting grout vein distribution after grouting of rock and soil bodies. The method is based on the elastic wave method and detects elastic wave velocity values ​​in different directions of a complete grouting section, so as to realize full-section detection of the grouting area. The three-dimensional wave velocity field of the grouting area is obtained by inversion, and the slurry diffusion range is determined according to the range of the wave velocity abnormal area. The method can realize three-dimensional imaging detection of the grouting effect, and has the advantages of wide coverage area and high detection accuracy.

[0030] The present invention provides a method for detecting grout vein distribution after grouting of rock and soil bodies, which mainly utilizes the transmission of elastic waves to simultaneously obtain the wave velocities of the rock and soil bodies and the grouting bodies. In addition, the accuracy can be adjusted by adjusting the weight calculation method.

[0031] The present invention provides a method for detecting slurry vein distribution after grouting of rock and soil bodies, which realizes an integrated process of drilling, grouting, device testing and grouting detection, greatly simplifies the operation process, and users do not need to frequently change the operating system when performing these operations, thereby improving work efficiency and convenience.

[0032] The present invention provides a method for detecting grout vein distribution after grouting of rock and soil bodies. Through direct application at the construction site, the method can quickly generate intuitive visual data results, can invert and reconstruct the grouting slurry distribution area according to the wave velocity anomaly area, and convert these data into three-dimensional images, thereby realizing efficient and accurate visual three-dimensional grouting detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which constitute a part of the specification of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute limitations of the present invention.

[0034] Figure 1 This is a flow chart of a method for detecting grout vein distribution after grouting of a rock mass in accordance with the first embodiment of the present invention;

[0035] Figure 2 It is a front view of the arrangement of the elastic wave transmitter and receiver according to the first embodiment of the present invention;

[0036] Figure 3 It is a left side view of the arrangement of the elastic wave transmitter and receiver according to the first embodiment of the present invention;

[0037] Figure 4 It is a right side view of the arrangement of the elastic wave transmitter and receiver according to the first embodiment of the present invention;

[0038] Figure 5 A top view of the arrangement of the elastic wave transmitter and receiver according to the first embodiment of the present invention;

[0039] Figure 6 This is a circuit connection diagram of a grout vein distribution detection system for a rock and soil body after grouting according to the second embodiment of the present invention;

[0040] Figure 7 FIG. 4 is a flowchart of a CPU according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0043] In the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention is further described below with reference to the accompanying drawings and embodiments.

[0044] Embodiment 1

[0045] The purpose of this first embodiment is to provide a method for detecting grout vein distribution after grouting of a rock mass.

[0046] The present embodiment provides a method for detecting the distribution of slurry veins after grouting of a rock mass, including: grouting the required grouting area; drilling elastic wave device holes at the edge of the non-grouting area; assembling elastic wave transmitters and receivers; recording the three-dimensional coordinates of each elastic transmitter and receiver; recording the time of transmitting elastic waves and receiving elastic waves; establishing a three-dimensional vector of wave velocity data; weighted distribution of wave velocities in different directions; drawing wave velocity contours in three-dimensional space; identifying abnormal wave velocity areas within contours; and inverting to form a three-dimensional distribution model of slurry. It realizes efficient and accurate three-dimensional imaging detection of grouting effects, and has the advantages of wide coverage area and high detection accuracy; and at the same time realizes three-dimensional visualization of grouting detection.

[0047] This embodiment provides a method for detecting grout vein distribution after grouting of a rock mass. Figure 1 The specific execution steps are as follows:

[0048] S1. Drill holes in the surrounding rock at the edge of the non-grouting area (i.e., the location of the non-grouting area adjacent to the grouting area), and drill two or more holes for elastic wave transmitter devices and two or more holes for elastic wave receiver devices. The hole depth should meet the requirements of the engineering design, and it should be ensured that all the holes for elastic wave transmitter devices and all the holes for elastic wave receiver devices are not in the same plane.

[0049] like Figure 2 As shown, the range of grouting area 1 is estimated, and holes are drilled in the surrounding rock at the edge of the non-grouting area, and two or more holes for elastic wave transmitter devices are drilled, such as Figure 3 Drill two or more elastic wave receiver device holes, such as Figure 4 The depth of the first elastic wave receiver device hole 301 and the second elastic wave receiver device hole 302 should meet the engineering design requirements, and at the same time, it should be ensured that all elastic wave transmitter device holes and all elastic wave receiver device holes are not in the same plane.

[0050] S2. Install one or more elastic wave transmitters in each elastic wave transmitter device hole to excite elastic wave signals.

[0051] like Figure 3 As shown, the first elastic wave transmitter 401, the second elastic wave transmitter 402, the third elastic wave transmitter 403, and the fourth elastic wave transmitter 404 are used to excite elastic wave signals.

[0052] S3. Install one or more elastic wave transmitters in each elastic wave receiver device hole to receive elastic wave signals, and perform tests to ensure that each receiver can receive elastic wave signals.

[0053] In order to ensure the data volume and data accuracy of wave speed recorded in different directions, N An elastic wave transmitter should be assembled N +2 or more elastic wave receivers, the number of elastic wave receivers is M Two elastic wave transmitters are installed in the first elastic wave transmitter device hole 201, and four or more elastic wave receivers are installed in the first elastic wave receiver device hole 301, such as Figure 4 The first elastic wave receiver 501, the second elastic wave receiver 502, the third elastic wave receiver 503, the fourth elastic wave receiver 504, and the fifth elastic wave receiver 505; two elastic wave transmitters are installed in the second elastic wave transmitter device hole 202, and four or more elastic wave receivers are correspondingly arranged in the second elastic wave receiver device hole 302, such as Figure 4 The sixth elastic wave receiver 506, the seventh elastic wave receiver 507, the eighth elastic wave receiver 508, the ninth elastic wave receiver 509, and the tenth elastic wave receiver 510. Figure 5 The top view can further determine the location and arrangement of the elastic wave transmitters and receivers, and then tests can be performed to ensure that each receiver can receive the elastic wave signal.

[0054] S4. After assembly, determine a three-dimensional Cartesian coordinate system and record the elastic wave transmitters. A i ( x i , y i , z i )( i =1,2,3,…, N ) and the three-dimensional coordinates of the elastic wave receiver B j ( x j , y j , z j )( j =1,2,3,…, M ). A i and( x i , y i , z i ) are all the three-dimensional coordinates of the transmitter, but they are expressed in different ways; similarly, B j and( x j, y j , z j ) are all receiver 3D coordinates, but they are expressed in different ways.

[0055] S5. The first elastic wave transmitter 401 to the fourth elastic wave transmitter 404 transmit elastic waves and record the transmission time. t 0,i The first elastic wave receiver 501 to the tenth elastic wave receiver 510 receive elastic waves and record the time of receiving the signal t ij ; Calculate the wave speed by the coordinate difference and time difference between the transmitter and the receiver: ,in, represents the wave speed between the i-th transmitter and the j-th receiver.

[0056] S6, combining the coordinates of the first elastic wave transmitter 401 to the fourth elastic wave transmitter 404 determined in step S4, the coordinates of the first elastic wave receiver 501 to the tenth elastic wave receiver 510 and the wave speed calculated in step S5, to establish a three-dimensional vector of wave speed data in different directions .

[0057] S7, based on the three-dimensional coordinates of the grouting area to be detected and the three-dimensional velocity vector established in step S6, the area to be detected is discretized into equidistant velocity points, and the three-dimensional coordinates of the velocity points in the area to be detected (grouting area) are used as the C k ( x k , y k , z k ) to the straight line where the wave velocity vector lies The distance is the weighting factor, and the distance formula is There is no unique way to calculate weights. Here is one method to calculate weights: ,in, l ij , m ij , n ij is the direction vector of the straight line, that is ; Weighted distribution of wave velocities in different directions to obtain the wave velocity corresponding to each point in the grouting area .

[0058] S8. Before grouting, based on the wave velocities of each point in the grouting area before grouting calculated in steps S4-S7, wave velocity contour lines in three-dimensional space are drawn.

[0059] S9, drilling and grouting are performed on the rock and soil area that needs grouting. After the grouting area 1 solidifies, S4-S7 are repeated to obtain the wave velocity of each point in the grouting area after grouting, and the wave velocity contour lines in the three-dimensional space are drawn.

[0060] S10. Due to the large difference between the elastic wave velocity in rock mass and cracks and the wave velocity in the slurry solidification area, Weng Lei published an article titled "Acoustic Emission Source Localization in Heterogeneous Rocks with Random Inclusions Using aPRM-Based Wave Velocity Model" in the journal "Rock Mechanics and Rock Engineering" in 2023, in which he measured the longitudinal wave velocity of cement mortar to be 1620m / s and the longitudinal wave velocity of sandstone to be 2580m / s through ultrasound. Jia Peng also pointed out in his article "Real-time Ultrasonic Characteristics of Rocks during Uniaxial Compression" published in the Journal of Central South University (Natural Science Edition) in 2022 that the wave velocities of granite, red sandstone and marble are all greater than 2000m / s. Since the propagation speed of elastic waves in the air is about 340m / s. After the cement mortar is cured, the difference between the wave velocity and the wave velocity of the original rock mass and the fracture area is large. The wave velocity of the intact rock mass is the highest, followed by the grouting reinforcement body, and the smallest is the fracture area. Therefore, the wave velocity below 1000m / s can be roughly defined as a low-speed area, and above 2000m / s belongs to a high-speed area. The specific wave velocity limit depends on the grouting material and proportion used and the properties of the rock and soil. Therefore, in the wave velocity distribution in the three-dimensional space measured by S8, the wave velocity above 2000m / s and the wave velocity distribution around 340m / s are mainly distributed. If the rock mass cracks are filled with slurry, the wave velocity in the three-dimensional space determined by step S9 in this area will increase; if the intact rock mass is split by the slurry to form new cracks, the wave velocity in the three-dimensional space determined by step S9 in this area will decrease. Therefore, by comparing the low-speed area and the high-speed area in the wave velocity contour lines of steps S8 and S9, and calculating the difference between the wave velocity contour lines of steps S8 and S9, the accurate positioning of the wave velocity change area can be identified, and the distribution characteristics of the wave velocity abnormal area (wave velocity increased area and wave velocity decreased area) after slurry filling can be obtained.

[0061] S11, according to step S10, the velocity anomaly area is inverted to form a three-dimensional distribution model of slurry. Inversion is divided into three cases: ① When the slurry fills the cracks and pores of the rock and soil body, the rock and soil body are combined with the grouting body to form a whole, and the wave velocity in this area is generally high, but because it is a combination of the rock and soil body and the grouting body, there is also a difference in wave velocity. When inverting the specific slurry distribution, it is necessary to combine the distribution characteristics of the wave velocity in the three-dimensional space before and after grouting, remove the highest and lowest wave velocity areas, and the remaining wave velocity areas are the slurry areas. According to the three-dimensional coordinates of the area, the three-dimensional distribution area of ​​the slurry vein can be inverted; ② When the slurry fills the formation cavity, empty area and karst cave, the slurry fills the entire empty area at this time, and the overall wave velocity has a large area increase, so the area with increased wave velocity is the slurry vein distribution area at this time; ③ If the complete rock mass is split by the slurry to form a new crack, the wave velocity in this area will be relatively reduced. By comparing the wave velocity before and after grouting in this area, the obtained wave velocity reduction area is the slurry vein distribution area. In addition, in actual application, these three cases can be established at the same time.

[0062] The present embodiment provides a method for detecting slurry vein distribution after grouting of rock and soil. Based on the elastic wave method, the elastic wave velocity values ​​in different directions of the complete grouting section are detected, and the three-dimensional velocity field of the grouting area is obtained by inversion. At the same time, the slurry diffusion range is determined according to the range of the velocity anomaly area. This method can realize three-dimensional imaging detection of grouting effects, and has the advantages of wide coverage area and high detection accuracy.

[0063] The present embodiment provides a method for detecting slurry vein distribution after grouting of rock and soil bodies. Based on the elastic wave method, it can realize full-section detection of the grouting area, cover a wide area, and have high detection accuracy. At the same time, according to the elastic wave velocity values ​​in different directions of detection, the three-dimensional velocity field of the grouting area can be inverted. At the same time, the slurry diffusion range is determined according to the range of the velocity anomaly area. This method can realize three-dimensional imaging detection of the grouting effect.

[0064] The present embodiment provides a method for detecting slurry vein distribution after grouting of rock and soil, which is different from the current main detection method in the background technology. It is a relatively new three-dimensional distribution detection method of grouting body, which mainly utilizes the transmission of elastic waves to simultaneously obtain the wave velocities of the rock and soil body and the grouting body. In addition, the accuracy can be adjusted by adjusting the weight calculation method.

[0065] The present embodiment provides a method for detecting slurry vein distribution after grouting of rock and soil, which realizes an integrated process of drilling, grouting, device testing and grouting detection, greatly simplifying the operation process; when performing these operations, users do not need to frequently change the operating system, thereby improving work efficiency and convenience.

[0066] Embodiment 2

[0067] The purpose of this second embodiment is to provide a grout vein distribution detection system after grouting of rock and soil. Figure 6As shown, it includes: a drilling device controller 6, an elastic wave transmitting and receiving controller 7, a central processing unit 8, a grouting effect display 9, and each device is connected by an electric wire or a data cable.

[0068] The drilling device controller 6 executes step S1 in the first embodiment to complete the drilling and grouting work in the grouting area to be detected and the drilling work of the elastic wave transmitting and receiving device in the early stage preparation.

[0069] The elastic wave transmitting and receiving controller 7 executes step S2 and step S3 in the first embodiment to complete the assembly and testing of the elastic wave transmitting and receiving device.

[0070] The central processing unit 8 executes steps S4 to S11 in the first embodiment, completes the wave velocity data processing, and performs inversion reconstruction of the grouting slurry distribution area according to the wave velocity anomaly area. Specifically, the coordinate setting of the elastic wave transmitter and the receiver and the wave velocity data collection are completed, and a three-dimensional vector of the wave velocity data is established based on this. Subsequently, the wave velocity vector is weightedly distributed according to the three-dimensional coordinates of the slurry, and then the wave velocity contour lines in the three-dimensional space are drawn and the wave velocity anomaly area is identified. Finally, the three-dimensional distribution model of the slurry is inverted through the wave velocity anomaly area. The specific process is as follows: Figure 7 .

[0071] The central processor 8 is configured with a velocity contour drawing module and an inversion module. The velocity contour drawing module is configured to draw velocity contours in three-dimensional space for the grouting area before and after grouting; the inversion module is configured to compare the velocity contours before and after grouting, obtain the velocity abnormal area, and then invert to form a slurry three-dimensional distribution model according to the velocity abnormal area. Among them, the drawing steps of the velocity contours in three-dimensional space include: obtaining the coordinates of each transmitter and the time of transmitting elastic waves and the coordinates of each receiver and the time of receiving elastic waves; calculating the velocity through the coordinate difference and time difference between the transmitter and the receiver, and establishing a velocity three-dimensional vector; based on the velocity three-dimensional vector, the grouting area is discretized into equidistant velocity points, and the distance from the velocity point to the straight line where the velocity three-dimensional vector is located is used as a weighting factor to weight the velocity in different directions. The velocity corresponding to each velocity point is obtained, and the velocity contours in three-dimensional space are drawn according to the velocity corresponding to each velocity point.

[0072] The grouting effect display 9 displays the final grouting distribution effect, realizing three-dimensional visualization of the grouting area.

[0073] The present embodiment provides a system for detecting grout vein distribution after grouting of rock and soil bodies. Through direct application at the construction site, it is possible to rapidly generate intuitive visual data results, perform inversion and reconstruction of the grouting slurry distribution area based on the wave velocity anomaly area, and convert these data into three-dimensional images, thereby realizing efficient and accurate visual three-dimensional grouting detection.

[0074] It should be noted here that each module in this embodiment corresponds to each step in Example 1 one by one, and the specific implementation process is the same, which will not be repeated here.

[0075] Embodiment 3

[0076] This embodiment provides a computer-readable storage medium on which a computer program is stored. The program is executed by a processor. When the program is executed by the processor, the steps in the method for detecting slurry vein distribution after grouting of a rock mass as described in the first embodiment above are implemented.

[0077] Embodiment 4

[0078] This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the program, the steps in the method for detecting slurry vein distribution after grouting of a rock mass as described in the first embodiment above are implemented.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0080] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A method for detecting grout vein distribution after grouting of rock and soil, characterized in that: include: Before and after grouting, wave velocity contours in three-dimensional space are drawn for the grouting area; Comparing the velocity contours before and after grouting, after obtaining the velocity anomaly area, a 3D slurry distribution model is formed based on the inversion of the velocity anomaly area. Specifically, the inversion is divided into three cases: when the slurry fills the cracks and pores of the rock and soil, the rock and soil are combined with the grouting body to form a whole. When the slurry distribution is specifically inverted, the distribution characteristics of the wave velocity in the three-dimensional space before and after grouting are combined, and the highest and lowest wave velocity areas are eliminated. The remaining wave velocity area is the slurry area, and the three-dimensional distribution area of ​​the slurry vein is inverted according to the three-dimensional coordinates of the area; when the slurry fills the formation cavity, empty area and karst cave, the slurry fills the entire empty area, and the overall wave velocity is increased in a large area. At this time, the area with increased wave velocity is the slurry vein distribution area; if the complete rock mass is split by the slurry to form new cracks, the wave velocity in the area is relatively reduced. By comparing the wave velocity before and after grouting in this area, the area with reduced wave velocity is the slurry vein distribution area; Among them, the steps of drawing wave velocity contour lines in three-dimensional space include: obtaining the coordinates of each transmitter and the time of transmitting elastic waves, as well as the coordinates of each receiver and the time of receiving elastic waves; calculating the wave velocity through the coordinate difference and time difference between the transmitter and the receiver, and establishing a three-dimensional wave velocity vector; based on the three-dimensional wave velocity vector, discretizing the grouting area into equidistant wave velocity points, using the distance from the wave velocity point to the straight line where the three-dimensional wave velocity vector is located as a weighting factor, weighting and distributing the wave velocities in different directions, obtaining the wave velocity corresponding to each wave velocity point, and drawing the wave velocity contour lines in three-dimensional space according to the wave velocity corresponding to each wave velocity point.

2. A method for detecting grout vein distribution after grouting of a rock mass according to claim 1, characterized in that: The wave speed is defined as: ;in, represents the wave speed from the i-th transmitter to the j-th receiver, ( x i , y i , z i ) represents the three-dimensional coordinates of the i-th transmitter, ( x j , y j , z j ) represents the three-dimensional coordinates of the jth receiver, t 0,i represents the time when the i-th transmitter emits the elastic wave, t ij It represents the time when the j-th receiver receives the elastic wave emitted by the i-th transmitter.

3. A method for detecting grout vein distribution after grouting of rock and soil as claimed in claim 1, characterized in that: The three-dimensional vector of wave velocity is expressed as: ;in, represents the wave speed from the i-th transmitter to the j-th receiver, A i represents the three-dimensional coordinates of the i-th emitter, B j represents the three-dimensional coordinates of the jth receiver.

4. A method for detecting grout vein distribution after grouting of rock and soil body according to claim 1, characterized in that: The wave speed corresponding to the wave speed point is expressed as: ;in, is the weight calculated based on the distance from the wave velocity point to the straight line where the wave velocity three-dimensional vector is located, represents the wave speed between the i-th transmitter and the j-th receiver.

5. A method for detecting grout vein distribution after grouting of rock and soil as claimed in claim 1, characterized in that: The distance from the wave velocity point to the straight line where the wave velocity three-dimensional vector is located is expressed as: ; in,( x i , y i , z i ) represents the three-dimensional coordinates of the transmitter, ( x k , y k , z k ) represents the three-dimensional coordinates of the wave velocity point, l ij , m ij and n ij It is the direction vector of the straight line where the three-dimensional wave velocity vector lies.

6. A method for detecting grout vein distribution after grouting of rock and soil as claimed in claim 1, characterized in that: Drill holes in the surrounding rock at the edge of the non-grouting area, drill two or more holes for elastic wave transmitter installation, and drill two or more holes for elastic wave receiver installation; install one or more transmitters in each hole for elastic wave transmitter installation, and install one or more transmitters in each hole for elastic wave receiver installation, and N Each transmitter should be equipped with N +2 more receivers.

7. A method for detecting grout vein distribution after grouting of a rock mass as claimed in claim 6, characterized in that: All elastic wave transmitter device holes and all elastic wave receiver device holes are not in the same plane.

8. A grout vein distribution detection system for rock and soil after grouting, characterized in that: include: A wave velocity contour drawing module, which is configured to: draw wave velocity contours in three-dimensional space for the grouting area before and after grouting; An inversion module is configured to: compare the wave velocity contours before and after grouting, obtain the wave velocity abnormal area, and then invert to form a slurry three-dimensional distribution model according to the wave velocity abnormal area; Specifically, the inversion is divided into three cases: when the slurry fills the cracks and pores of the rock and soil, the rock and soil are combined with the grouting body to form a whole. When the slurry distribution is specifically inverted, the distribution characteristics of the wave velocity in the three-dimensional space before and after grouting are combined, and the highest and lowest wave velocity areas are eliminated. The remaining wave velocity area is the slurry area, and the three-dimensional distribution area of ​​the slurry vein is inverted according to the three-dimensional coordinates of the area; when the slurry fills the formation cavity, empty area and karst cave, the slurry fills the entire empty area, and the overall wave velocity is increased in a large area. At this time, the area with increased wave velocity is the slurry vein distribution area; if the complete rock mass is split by the slurry to form new cracks, the wave velocity in the area is relatively reduced. By comparing the wave velocity before and after grouting in this area, the area with reduced wave velocity is the slurry vein distribution area; Among them, the steps of drawing wave velocity contour lines in three-dimensional space include: obtaining the coordinates of each transmitter and the time of transmitting elastic waves, as well as the coordinates of each receiver and the time of receiving elastic waves; calculating the wave velocity through the coordinate difference and time difference between the transmitter and the receiver, and establishing a three-dimensional wave velocity vector; based on the three-dimensional wave velocity vector, discretizing the grouting area into equidistant wave velocity points, using the distance from the wave velocity point to the straight line where the three-dimensional wave velocity vector is located as a weighting factor, weighting and distributing the wave velocities in different directions, obtaining the wave velocity corresponding to each wave velocity point, and drawing the wave velocity contour lines in three-dimensional space according to the wave velocity corresponding to each wave velocity point.

9. A computer-readable storage medium having a computer program stored thereon, the program being executed by a processor, characterized in that: When the program is executed by a processor, the steps in a method for detecting grout vein distribution after grouting of a rock mass as described in any one of claims 1 to 7 are implemented.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps in the method for detecting grout vein distribution after grouting of a rock mass as described in any one of claims 1-7 are implemented.

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