Full-length segmented control grouting cataclastic rock mass steel anchor pipe reinforcing system and method

Abstract

The invention discloses a full-length subsection control grouting cataclastic rock mass steel anchor pipe reinforcing system which is used for controlling grouting prestress in a subsection mode for multiple times and comprises a drilling unit, a steel anchor pipe reinforcing unit and a steel anchor pipe reinforcing unit. The grouting unit comprises a slurry transfer pipe, a grouting pipe body and a grouting hole; the grouting pipe body is arranged above the grouting drill bit section and is divided into a plurality of sections to form grouting pipe body sections so as to implement segmented grouting; the grout transfer pipes are vertically arranged on the inner sides of the grouting pipe bodies and used for conveying grout to the grouting pipe bodies with different depths; the outer wall of the grouting pipe body wraps the anchor pipe body and is provided with a plurality of grouting holes, and the inner wall of the grouting pipe body is not provided with the grouting hole anchor pipe reinforcing unit which comprises the anchor pipe body, an anchor pipe tray and an anchor pipe lock; the anchor pipe body covers the outer side of the grouting pipe body; the anchor pipe tray is horizontally arranged at the top end of the grouting pipe body; the anchor pipe lockset is arranged at the top end of the anchor pipe tray in a fastening mode and exerts prestress on the anchor pipe tray and the anchor pipe body. The invention further discloses a corresponding grouting method.

Description

Technical Field

[0001] The present invention relates to the field of landslide prevention and control technology detection technology, and in particular to a full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system and method based on controlled grouting technology. Background Art

[0002] Because fractured rock slopes are characterized by numerous random cracks, poor integrity, and loose rock mass, they are prone to failure and instability under the influence of natural factors and human activities. Full-length segmented grouting anchor pipes provide additional anchoring force, connecting unstable rock mass with deeper stable strata, thereby enhancing the integrity and stability of the entire slope. Furthermore, compared with other large-scale slope reinforcement methods (such as slope cutting and retaining walls), segmented grouting anchor pipe reinforcement is generally less costly and relatively simple to construct, allowing for quick completion and minimizing the impact on project schedules. Multi-shot grouting involves multiple grouting operations within the same hole or area. Each grouting operation may be spaced apart to achieve better reinforcement or meet specific project requirements. For example, split grouting requires "small injections and frequent re-injections," with at least five re-injections required to ensure effective grouting. This method allows the grout to more fully fill rock fractures and improve reinforcement effectiveness. Segmented grouting involves dividing the grouting process into distinct sections. For deep hole grouting or in situations with complex formation conditions, to ensure grouting quality, the entire hole or area is divided into several sections, and grouting is then carried out section by section. Based on the order of drilling and grouting, segmented grouting can be divided into two types: segmented forward grouting and segmented backward grouting. Segmented forward grouting involves drilling one section at a time and grouting one section at a time until the last section at the bottom of the hole is completely grouted. Segmented backward grouting, on the other hand, involves drilling to the full hole depth in one go, then grouting in sections starting from the bottom of the hole. After each section is completed, the grouting is withdrawn one section to begin grouting the next section.

[0003] In contrast, multiple grouting emphasizes the number of grouting times, and enhances the effect by repeating the grouting multiple times; while segmented grouting focuses on dividing the grouting process into different sections according to the hole depth or stratum conditions, in order to adapt to complex geological conditions or improve the quality and effect of grouting.

[0004] In actual engineering, the main problem faced by segmented grouting is that the grouting drilling of segmented forward grouting is repetitive and the engineering workload is large. This method requires grouting after drilling a section, and then continuing to drill the next section, and repeating this process, resulting in a lot of repetition in the drilling work. Segmented backward grouting has relatively high requirements for the stratum. It is generally suitable for rock formations that are partially broken but can be drilled. If the stratum is too loose or severely broken, it may be difficult to effectively set the grouting plug, which will affect the effect of segmented grouting. Segmented grouting and multiple grouting each have their own advantages, but the existing reinforcement technology cannot combine the two well. Summary of the Invention

[0005] The purpose of the present invention is to design a full-length segmented controlled grouting fractured rock steel anchor pipe reinforcement system and method based on controlled grouting technology to address the defects of the existing technology. The equipment involved in the system is simple to manufacture and construct and can combine multiple grouting, segmented grouting and anchor pipe prestressing well to achieve better reinforcement effect, and provide a matching reinforcement method to solve the problems raised in the above background technology.

[0006] The first aspect of the present invention is to provide a full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system for multiple segmented controlled grouting prestressing, comprising:

[0007] The drilling unit comprises: a grouting drill bit section (1);

[0008] The grouting unit comprises: a grouting pipe (4), a grouting pipe body (8) and a grouting hole (2); the grouting pipe body (8) is arranged above the drill bit section (1) and is divided into multiple sections to form a grouting pipe body section, so as to implement segmented grouting; the grouting pipe (4) is vertically arranged on the inner side of the grouting pipe body (8), and has multiple grouting pipes corresponding to grouting pipe bodies of different depths, respectively, for transporting slurry to grouting pipe bodies of different depths; the outer wall of the grouting pipe body (8) covers the anchor pipe body and is provided with multiple grouting holes (2), and the inner wall of the grouting pipe body (8) is not provided with the grouting hole (2);

[0009] An anchor pipe reinforcement unit comprises: an anchor pipe body, an anchor pipe tray (5) and an anchor pipe lock (6); wherein the anchor pipe body is wrapped around the outside of the grouting pipe body (8), and the top end is flush with or slightly higher than the top end of the grouting pipe body (8); the anchor pipe tray (5) is horizontally arranged at the top end of the grouting pipe body (8) to provide an anchor point for fixing the grouting unit; the anchor pipe lock (6) is fastened to the top end of the anchor pipe tray (5), so that when the anchor pipe lock (6) is tightened or screwed under external force, prestress is applied to the anchor pipe tray (5) and the anchor pipe body.

[0010] Preferably, the cross section of the grouting pipe body (8) is a thin circular ring.

[0011] Preferably, the grouting unit further comprises a blocking component (3), and the grouting pipe bodies of different depths are separated by the blocking component (3); the blocking component is blocked by a rigid additional flexible gasket, a fully rigid component, or a fully flexible component.

[0012] Preferably, the width of the anchor pipe tray (5) is greater than the diameter of the grouting pipe body (8).

[0013] Preferably, a switch unit is further included, wherein the switch unit includes a plurality of switch valves (7) arranged on the top of the anchor pipe lock (6) and corresponding to a plurality of grouting pipe bodies of different depths.

[0014] The second aspect of the present invention further provides a grouting method for reinforcing a fractured rock mass steel anchor pipe based on full-length segmented controlled grouting, comprising:

[0015] S1, preparing for grouting based on the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system;

[0016] S2, performing segmented grouting based on the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system;

[0017] S3, detecting whether the injected slurry has been substantially solidified; when the injected slurry has been substantially solidified, tightening the anchor pipe lock (6), thereby applying prestress to the anchor pipe tray (5) and the anchor pipe body, thereby completing the operation of multiple segmented grouting and applying prestress to the anchor pipe.

[0018] Preferably, the S1 includes:

[0019] S11, design and install the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system;

[0020] S12, installing the designed full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system.

[0021] Preferably, the S11 includes:

[0022] (1) Determining design parameters according to geological exploration data, the design parameters including: the length of the grouting drill bit section (1) and the anchor pipe body; the specifications of the grouting hole; the length of the grouting pipe (4) determined according to the length of the anchor pipe body; and determining whether the plugging assembly (3) is integrally formed with the anchor pipe body or separately formed;

[0023] (2) Drilling is performed on the working surface according to the designed hole position until the anchor pipe reinforcement unit is completely immersed in the soil, and the anchor pipe lock (6) and the anchor pipe tray (5) are drilled to the edge of the soil, and the drilling is stopped.

[0024] Preferably, the S2 includes:

[0025] S21, based on demand, opening the switch valve (7) of the grouting pipe (4) corresponding to the deepest grouting section and performing grouting, monitoring the grouting section slurry pressure and grouting volume in real time during the grouting process, and stopping the grouting of the deepest grouting section when the grouting pressure and the grouting volume reach the design requirements;

[0026] S22, sequentially opening and closing the switch valves (7) of the grouting pipes (4) corresponding to the middle grouting section and the shallowest grouting section to perform grouting operations; real-time monitoring of the grouting section slurry pressure and grouting volume during the grouting process; when the grouting pressure and the grouting volume reach the design requirements, stopping the middle grouting section and the shallowest grouting section; thus completing the first round of segmented grouting;

[0027] S23, after the first round of segmented grouting is completed, the second round of segmented grouting is started based on the multiple grouting slurry interval requirements adopted.

[0028] Preferably, after the first round of segmented grouting of each section is completed, the corresponding section valve (7) is opened based on parameters such as the grouting section slurry pressure to perform grouting.

[0029] Beneficial effects of the method and system of the present invention:

[0030] 1. The system of the present invention is segmented by plugging components. Therefore, there is no need to move the grouting pipe for segmented grouting. Instead, grouting is performed through different grouting pipes, which can easily achieve good segmented grouting results. Compared with traditional forward or backward segmented grouting construction methods, this system has significant advantages and greatly improves the convenience of construction.

[0031] 2. The system and method of the present invention utilizes different grouting pipes to achieve precise segmented grouting in space, ensuring that each section receives targeted treatment. Furthermore, grouting can be spaced out over time, achieving the effect of multiple grouting injections in corresponding sections. This flexible temporal and spatial control results in more optimal grouting results, better meeting the complex needs of projects and effectively improving grouting quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a schematic structural diagram of a multiple segmented controlled grouting prestressed anchor pipe system provided according to an embodiment of the present invention.

[0034] Figure 2 This is a multiple-segment controlled grouting prestressed anchor pipe device and the corresponding hole positions of the grouting holes in each cross section provided according to an embodiment of the present invention.

[0035] Figure 3This is a half-section diagram of a prestressed anchor pipe with multiple segmented controlled grouting according to an embodiment of the present invention. Figure 3 (a) is a half-section diagram of the deep grouting section. Figure 3 (b) is a half-section view of the middle grouting section.

[0036] Figure 4 The present invention provides an overall flow chart of a grouting method for reinforcing a fractured rock mass steel anchor pipe based on full-length segmented controlled grouting according to an embodiment of the present invention.

[0037] Figure 5 This is a flow chart of a grouting preparation method based on the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system provided in an embodiment of the present invention.

[0038] Figure 6 This is a flow chart of a segmented grouting method based on the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system provided in an embodiment of the present invention.

[0039] In the figure: 1-drill bit section; 2-grouting hole; 3-sealing assembly; 4-grouting pipe; 5-anchor pipe tray; 6-anchor pipe lock; 7-switch valve; 8-grouting pipe body. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] The following multiple embodiments provide a method and system that can automatically, quickly and accurately detect and identify the loose status of sound barrier bolts, so as to improve the safety and reliability of sound barriers, and bring new technological breakthroughs and progress to the field of railway sound barrier appearance status detection. Among them, the intelligent identification method and system for loose railway sound barrier bolts comprehensively utilizes technical means such as large-model small-sample object detection, bolt foreground segmentation, and bolt morphology recognition, thereby solving various technical problems existing in traditional methods, integrating a design based on high-definition imaging and laser scanning technology, and using a fast non-contact method to achieve rapid acquisition of the loose status of railway sound barrier bolts; at the same time, artificial intelligence technology is used to achieve online identification of loose sound barrier bolts; the system can be easily installed on railway track self-propelled running equipment, and can quickly detect the status of sound barrier bolts along its running trajectory, while automatically outputting key information such as the location and quantity of loose bolts, significantly improving the efficiency of inspection of the loose status of sound barrier bolts, and providing real-time decision support for railway operation and maintenance personnel. The purposes of the technical solution include:

[0044] (1) To address the problem of scarce training samples, a large-model, small-sample object detection method is adopted. By training on limited training samples, different types of bolts are identified and different loosening detection schemes are designed to improve the detection effect.

[0045] (2) A bolt foreground segmentation module is proposed, which comprehensively considers the effects of noise suppression, local feature extraction and global dependency modeling, realizes specific processing of the bolt area, and can achieve better results in the segmentation task of processing bolt scenes, and effectively copes with challenges such as image noise, blur and background interference.

[0046] (3) The shape pattern of bolt loosening is defined according to the different shapes of bolts. Combining the three states of loose, loose and normal, six bolt shape patterns are defined. Then, the corresponding waveform is calculated based on the segmentation results, and the shape of the waveform is judged according to the threshold, thereby realizing the classification and detection of different bolt states.

[0047] Example 1

[0048] See also Figure 1-3 This embodiment provides a full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system, which is used for multiple segmented controlled grouting prestressing, including:

[0049] The drilling unit comprises: a grouting drill bit section 1;

[0050] The grouting unit comprises: a grouting pipe 4, a grouting pipe body 8 and a grouting hole 2; the grouting pipe body 8 is arranged above the drill bit section 1 and is divided into multiple sections to form a grouting pipe body section to implement segmented grouting; the grouting pipe 4 is vertically arranged on the inner side of the grouting pipe body 8, and has multiple sections corresponding to grouting pipe bodies of different depths, which are used to transport slurry to grouting pipe bodies of different depths; the outer wall of the grouting pipe body 8 covers the anchor pipe body and is provided with multiple grouting holes 2, and the inner wall of the grouting pipe body 8 is not provided with the grouting holes 2; in this embodiment, the grouting pipe body 8 has a thin circular cross-section; in this embodiment, the grouting unit further includes a plugging component 3, and the grouting pipe bodies of different depths are separated by the plugging component 3; the plugging component can be sealed by a rigid additional flexible gasket, or by a fully rigid (such as a rigid slurry plug) or fully flexible component (such as a flexible slurry plug), all of which are within the scope of protection of the present invention; in this embodiment, if conditions permit, the plugging component 3 can be designed to be a structure integrally formed with the pipe body, and if the manufacturing process is not up to standard, a slurry plug can be used.

[0051] The anchor pipe reinforcement unit includes: an anchor pipe body, an anchor pipe tray 5 and an anchor pipe lock 6; wherein, the anchor pipe body is wrapped around the outside of the grouting pipe body 8, and the top end is flush with or slightly higher than the top end of the grouting pipe body 8; the anchor pipe tray 5 is horizontally arranged at the top end of the grouting pipe body 8, for providing an anchor point for fixing the grouting unit, and the width of the anchor pipe tray 5 is greater than the diameter of the grouting pipe body 8; the anchor pipe lock 6 is fastened to the top end of the anchor pipe tray 5, so that when the anchor pipe lock 6 is tightened or screwed by external force, prestress is applied to the anchor pipe tray 5 and the anchor pipe body.

[0052] As a preferred embodiment, a switch unit is further included. The switch unit includes multiple switch valves 7, which are installed on top of the anchor pipe lock 6 and correspond to multiple grouting pipes of different depths (only one is shown in the figure). The switch valves can be mechanical valves or electromagnetic valves. Of course, those skilled in the art will appreciate that any suitable valve type can be used and is within the scope of protection of the present invention.

[0053] Example 2

[0054] See also Figure 4-6 This embodiment provides a grouting method for reinforcing a fractured rock mass with a steel anchor pipe based on full-length segmented controlled grouting, comprising:

[0055] S1, performing grouting preparation based on the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system;

[0056] As a preferred embodiment, the S1 includes:

[0057] S11, design and install the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system;

[0058] As a preferred embodiment, the S11 includes:

[0059] (1) Determining design parameters according to geological exploration data, the design parameters including: the length of the grouting drill bit section 1 and the anchor pipe body; the specifications of the grouting hole; the rated length of the grouting pipe 4 based on the length of the anchor pipe body; and determining whether the plugging assembly 3 is integrally formed with the anchor pipe body or separately formed;

[0060] In this embodiment, the grouting hole 2 can be of a conventional diameter, and the length of the slurry transfer pipe 4 is set according to the length of the pipe body. If conditions permit, the blocking component 3 can be designed to be integrally formed with the pipe body. If the manufacturing process is not up to standard, a slurry blocking plug can be used to manufacture the device.

[0061] (2) Drilling is performed on the working surface according to the designed hole position until the anchor pipe reinforcement unit is completely immersed in the soil and the anchor pipe lock 6 and the anchor pipe tray 5 are drilled to the edge of the soil, and the drilling is stopped.

[0062] S12, installing the designed full-length segmented controlled grouting fractured rock steel anchor pipe reinforcement system.

[0063] S2, performing segmented grouting based on the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system;

[0064] As a preferred embodiment, the S2 includes:

[0065] S21, based on demand, opening the switch valve 7 of the grouting pipe 4 corresponding to the deepest grouting section and performing grouting, monitoring the grouting section slurry pressure and grouting volume in real time during the grouting process, and stopping the grouting of the deepest grouting section when the grouting pressure and the grouting volume reach the design requirements;

[0066] S22, sequentially opening and closing the switch valves 7 of the grouting pipe 4 corresponding to the middle grouting section and the shallowest grouting section to perform grouting operations; monitoring the grouting section slurry pressure and grouting volume in real time during the grouting process, and stopping the middle grouting section and the shallowest grouting section when the grouting pressure and the grouting volume reach the design requirements; thus completing the first round of segmented grouting;

[0067] S23, after the first round of segmented grouting is completed, the second round of segmented grouting is started based on the multiple grouting slurry interval requirements adopted.

[0068] As a preferred embodiment, the grouting sequence is generally from deep to shallow. Generally, two rounds of grouting can meet the requirements, and it can also include: according to actual conditions, such as the slurry pressure and other parameters of the grouting section, the corresponding section valve 7 is opened for grouting; thus, multiple groutings are completed, and each grouting is performed in sections.

[0069] S3, check whether the injected slurry has basically solidified; when the injected slurry has basically solidified, tighten the anchor pipe lock 6 to apply prestress to the anchor pipe tray 5 and the anchor pipe body, thereby completing multiple segmented grouting and applying prestress to the anchor pipe.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system, characterized in that: Used for multiple segmented control of grouting prestressing, including: The drilling unit comprises: a grouting drill bit section (1); The grouting unit comprises: a grouting pipe (4), a grouting pipe body (8) and a grouting hole (2); the grouting pipe body (8) is arranged above the grouting drill bit section (1) and is divided into multiple sections to form a grouting pipe body section, so as to implement segmented grouting; the grouting pipe (4) is vertically arranged on the inner side of the grouting pipe body (8), and has multiple grouting pipes corresponding to grouting pipe bodies of different depths, respectively, for transporting slurry to grouting pipe bodies of different depths; the outer wall of the grouting pipe body (8) covers the anchor pipe body and is provided with multiple grouting holes (2), and the inner wall of the grouting pipe body (8) is not provided with the grouting holes (2); An anchor pipe reinforcement unit comprises: an anchor pipe body, an anchor pipe tray (5) and an anchor pipe lock (6); wherein the anchor pipe body is wrapped around the outside of the grouting pipe body (8), and the top end is flush with or slightly higher than the top end of the grouting pipe body (8); the anchor pipe tray (5) is horizontally arranged at the top end of the grouting pipe body (8) to provide an anchor point for fixing the grouting unit; the anchor pipe lock (6) is fastened to the top end of the anchor pipe tray (5), so that when the anchor pipe lock (6) is tightened or screwed under external force, prestress is applied to the anchor pipe tray (5) and the anchor pipe body.

2. The full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system according to claim 1 is characterized in that: The cross section of the grouting pipe body (8) is a thin circular ring.

3. The full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system according to claim 2 is characterized in that: The grouting unit further comprises a blocking component (3), and the grouting pipe bodies of different depths are separated by the blocking component (3); the blocking component is blocked by a rigid additional flexible gasket, a fully rigid component, or a fully flexible component.

4. The full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system according to claim 3 is characterized in that: The width of the anchor pipe tray (5) is greater than the diameter of the grouting pipe body (8).

5. The full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system according to claim 1 is characterized in that: It also includes a switch unit, which includes a plurality of switch valves (7) arranged on the top of the anchor pipe lock (6) and corresponding to a plurality of grouting pipe bodies of different depths.

6. A grouting method for the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system according to claim 5, characterized in that: include: S1, preparing for grouting based on the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system; S2, performing segmented grouting based on the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system; S3, detecting whether the injected slurry has been substantially solidified; when the injected slurry has been substantially solidified, tightening the anchor pipe lock (6), thereby applying prestress to the anchor pipe tray (5) and the anchor pipe body, thereby completing the operation of multiple segmented grouting and applying prestress to the anchor pipe.

7. The grouting method according to claim 6, characterized in that: Said S1 comprises: S11, design and install the full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system; S12, installing the designed full-length segmented controlled grouting fractured rock mass steel anchor pipe reinforcement system.

8. The grouting method according to claim 7, characterized in that: The S11 includes: (1) Determining design parameters according to geological exploration data, the design parameters including: the length of the grouting drill bit section (1) and the anchor pipe body; the specifications of the grouting hole; the length of the grouting pipe (4) determined according to the length of the anchor pipe body; and determining whether the plugging assembly (3) is integrally formed with the anchor pipe body or separately formed; (2) Drilling is performed on the working surface according to the designed hole position until the anchor pipe reinforcement unit is completely immersed in the soil, and the anchor pipe lock (6) and the anchor pipe tray (5) are drilled to the edge of the soil, and the drilling is stopped.

9. The grouting method according to claim 8, characterized in that: The S2 includes: S21, based on demand, opening the switch valve (7) of the grouting pipe (4) corresponding to the deepest grouting section and performing grouting, monitoring the grouting section slurry pressure and grouting volume in real time during the grouting process, and stopping the grouting of the deepest grouting section when the grouting pressure and the grouting volume reach the design requirements; S22, sequentially opening and closing the switch valves (7) of the grouting pipes (4) corresponding to the middle grouting section and the shallowest grouting section to perform grouting operations; real-time monitoring of the grouting section slurry pressure and grouting volume during the grouting process; when the grouting pressure and the grouting volume reach the design requirements, stopping the middle grouting section and the shallowest grouting section; thus completing the first round of segmented grouting; S23, after the first round of segmented grouting is completed, the second round of segmented grouting is started based on the multiple grouting slurry interval requirements adopted.

10. The grouting method according to claim 9, characterized in that: After the first round of segmented grouting in each section is completed, the corresponding section valve (7) is opened based on parameters such as the grouting section slurry pressure to perform grouting.

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