Grouting auxiliary device and grouting method thereof

Abstract

The invention provides a grouting auxiliary device and a grouting method thereof, and belongs to the technical field of grouting. The auxiliary device comprises a connecting pipe, a clamping assembly and a sealing assembly. The connecting pipe is detachably connected with the tail of the advanced small catheter through the clamping assembly, and the diameter of the connecting pipe is smaller than that of the advanced small catheter. The sealing assembly is arranged on the connecting pipe and used for sealing a gap between the connecting pipe and the advanced small guide pipe. The auxiliary device has the effects of improving the grouting efficiency and saving the grouting cost.

Description

Technical Field

[0001] The present disclosure relates to the technical field of grouting, and more particularly, to a grouting auxiliary device and a grouting method thereof. Background Art

[0002] During the construction of the advanced small duct, a drilling device is first used to drill small duct holes along the excavation line position of the building to be grouted. The aperture, depth, and external insertion angle of the small duct holes must meet the design requirements. After the small duct holes are drilled, the advanced small duct is inserted into the small duct holes, and the tail of the advanced small duct is connected to the grouting machine to grout the small duct.

[0003] However, in the process of the advanced small duct process, there is a problem that the elevation of the tail of the advanced small duct is lower than that of the top, which will cause the grouting liquid to easily flow out from the tail of the advanced small duct during the grouting process. In some existing technologies, to solve such problems, a steel plate is welded to block at the tail of the advanced small duct, and a valve is welded at the blocking position. The valve is opened when grouting is required, and the blocking and valve are burned off with a welding machine after the grouting is completed.

[0004] Using this method, there are the following defects: First, the welding process will be introduced, reducing the grouting efficiency of the building; Second, welding will generate harmful gases, seriously affecting the personal safety of the operators; Third, when the blocking and valve are burned off after the grouting is completed, there will be more slurry in the valve, resulting in material waste. At the same time, the burned blocking and valve cannot be reused, resulting in material waste; Fourth, the diameter of the advanced small duct is small, and it is not easy to weld the blocking and valve.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art, and provide a grouting auxiliary device and a grouting method thereof, so as to improve the grouting efficiency, reduce the grouting cost, and protect the personal health of the operators.

[0007] According to the first aspect of the present disclosure, a grouting auxiliary device is provided for hermetically connecting a grouting device with an advanced small duct. The auxiliary device is characterized in that it includes a connecting pipe, a clamping assembly, and a sealing assembly;

[0008] The connecting pipe is detachably connected to the tail of the advanced small duct through the clamping assembly, and the diameter of the connecting pipe is smaller than the diameter of the advanced small duct;

[0009] The sealing assembly is arranged on the connecting pipe for sealing the gap between the connecting pipe and the advanced small duct.

[0010] According to an embodiment of the present disclosure, the clamping component includes a connecting column;

[0011] The connecting column is provided on the connecting pipe, and the axial direction of the connecting column is perpendicular to the axial direction of the connecting pipe;

[0012] The front pilot pipe has a clamping groove corresponding to the connecting column.

[0013] According to an embodiment of the present disclosure, the clamping groove includes a first groove section and a second groove section communicated with the first groove section;

[0014] The length direction of the first groove section is the same as the length direction of the front pilot pipe;

[0015] The length direction of the second groove section is perpendicular to the length direction of the first groove section;

[0016] Wherein, the connecting column has a connecting state and a stable state. In the connecting state, the connecting column is located in the first groove section; in the stable state, the connecting column is located in the second groove section.

[0017] According to an embodiment of the present disclosure, the side of the second groove section away from the first groove section has an arc section, wherein the radian of the arc section matches the radian of the connecting column.

[0018] According to an embodiment of the present disclosure, there are multiple clamping components, and the multiple clamping components are evenly distributed along the circumferential direction of the connecting pipe.

[0019] According to an embodiment of the present disclosure, the sealing component includes a sealing capsule, a hydraulic press and a hydraulic pipe;

[0020] The connecting pipe has a liquid inlet;

[0021] The sealing capsule has a sealing state;

[0022] In the sealing state, part of the connecting pipe extends into the front pilot pipe, the sealing capsule is wound around the connection position of the connecting pipe and the front pilot pipe, and the sealing capsule is in an expanded state;

[0023] One end of the hydraulic pipe is connected to the sealing capsule, and the other end is connected to the hydraulic press.

[0024] According to an embodiment of the present disclosure, the sealing component further includes a hydraulic valve;

[0025] The hydraulic valve is provided on the hydraulic pipe.

[0026] According to an embodiment of the present disclosure, the sealing capsule further has a normal state. In the normal state, the distance between the side of the sealing capsule close to the liquid inlet and the connecting column is a first distance;

[0027] The distance between the tail of the advanced small conduit and the bottom wall of the second groove section is a second distance, and the first distance is greater than the second distance.

[0028] According to a second aspect of the present disclosure, there is provided a grouting method, which includes:

[0029] An installation groove is formed at the tail of the advanced small conduit, and the installation groove includes a first groove section and a second groove section;

[0030] A connecting column is provided on the connecting pipe;

[0031] The connecting pipe is inserted into the advanced small conduit, and the connecting pipe is rotated. The connecting column extends into the second groove section through the first groove section, and the connecting column cooperates with the second groove section;

[0032] The sealing assembly is adjusted, and the sealing assembly seals the gap between the connecting pipe and the advanced small conduit;

[0033] The grouting equipment is turned on.

[0034] According to an embodiment of the present disclosure, when an installation groove is formed at the tail of the advanced small conduit, and the installation groove includes a first groove section and a second groove section, an arc section is formed on the side of the second groove section away from the first groove section, and the radian of the arc section matches the radian of the connecting column.

[0035] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0037] Figure 1 It is a schematic structural diagram of an advanced small conduit in an embodiment of the present disclosure.

[0038] Figure 2 It is a schematic structural diagram of a connecting pipe and a sealing assembly in an embodiment of the present disclosure.

[0039] Figure 3In one embodiment of the present disclosure, it is a schematic diagram of the steps of the grouting method.

[0040] Description of reference numerals: 1. Advance small duct; 11. Clamping groove; 111. First groove section; 112. Second groove section; 1121. Arc section; 2. Connecting pipe; 21. Connecting column; 22. Liquid inlet; 3. Clamping assembly; 4. Sealing assembly; 41. Sealing capsule; 42. Hydraulic press; 43. Hydraulic pipe; 44. Hydraulic valve; A1. First distance; A2. Second distance. Detailed implementation manners

[0041] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the figures denote the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0042] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the icon to another component, these terms are used in this specification only for convenience, for example, according to the direction of the example described in the accompanying drawings. It can be understood that if the device of the icon is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" disposed on another structure, or that a structure is "indirectly" disposed on another structure through another structure.

[0043] It has been found that in the related art, during the construction of the advance small duct, there is a problem that the elevation of the tail of the advance small duct is lower than that of the top, which will cause the phenomenon that the grouting liquid is likely to flow out from the tail of the advance small duct during the grouting process. In some existing technologies, to solve such problems, a steel plate is welded to block the tail of the advance small duct, and a valve is welded at the blocking position. The valve is opened when grouting is required, and the blocking and the valve are burned off with a welding machine after the grouting is completed. Using the above method will not only reduce the grouting efficiency and increase the grouting cost, but also have an impact on the health of the operators.

[0044] Based on this, the present disclosure provides a grouting auxiliary device and its grouting method. The grouting auxiliary device and the grouting method using the grouting auxiliary device can improve the grouting efficiency, reduce the grouting cost and will not have an impact on the health of the operators.

[0045] The following will describe the grouting auxiliary device in detail with reference to the related drawings:

[0046] In the embodiments of the present disclosure, referring to Figure 1 and Figure 2 , this grouting auxiliary device is used to seal and connect a grouting device (not specifically shown in the drawings of this application) with the advanced small duct 1; the auxiliary device includes a connecting pipe 2, a clamping assembly 3 and a sealing assembly 4; the connecting pipe 2 is detachably connected to the tail of the advanced small duct 1 through the clamping assembly 3, and the diameter of the connecting pipe 2 is smaller than the diameter of the advanced small duct 1; the sealing assembly 4 is arranged on the connecting pipe 2 for sealing the gap between the connecting pipe 2 and the advanced small duct 1.

[0047] Specifically, when grouting the building to be treated, the connecting pipe 2 is brought close to the tail of the advanced small duct 1, and the tail of the advanced small duct 1 is connected and fixed to the connecting pipe 2 through the clamping assembly 3. At the same time, the sealing assembly 4 is used to seal the gap between the advanced small duct 1 and the connecting pipe 2, so as to realize the sealing and fixing of the connecting pipe 2 and the advanced small duct 1. Then the grouting device is started to grout the building to be treated. With such a setting, the connection between the connecting pipe 2 and the advanced small duct 1 can be quickly realized, thereby improving the grouting efficiency. At the same time, after the building grouting is completed, the connecting pipe 2 and the advanced small duct 1 can be disassembled for the grouting operation of the next advanced small duct 1. Compared with the related technology, it can reduce the waste of materials and lower the grouting cost.

[0048] In some embodiments, referring to Figure 2 , the clamping assembly 3 includes a connecting column 21; the connecting column 21 is arranged on the connecting pipe 2, and the axial direction of the connecting column 21 is perpendicular to the axial direction of the connecting pipe 2; the advanced small duct 1 is provided with a clamping groove 11 corresponding to the connecting column 21.

[0049] Specifically, when grouting the building to be treated, the connecting pipe 2 is inserted into the advanced small duct 1. The movement of the connecting pipe 2 drives the movement of the connecting column 21, and the connecting column 21 extends into the clamping groove 11. The connecting column 21 cooperates with the clamping groove 11 to realize the connection between the connecting pipe 2 and the advanced small duct 1.

[0050] As an example, referring to Figure 1 , the clamping groove 11 includes a first groove section 111 and a second groove section 112 communicated with the first groove section 111; the length direction of the first groove section 111 is the same as the length direction of the advanced small duct 1; the length direction of the second groove section 112 is perpendicular to the length direction of the first groove section 111; wherein, the connecting column 21 has a connection state and a stable state. In the connection state, the connecting column 21 is located in the first groove section 111; in the stable state, the connecting column 21 is located in the second groove section 112.

[0051] It should be understood that in this example, the connection state refers to the state when the connecting pipe 2 is to be connected to the front pilot pipe 1, and the stable state refers to the state after the connecting pipe 2 and the front pilot pipe 1 are stably connected. Specifically, when installing and fixing the connecting pipe 2 and the front pilot pipe 1, the connecting pipe 2 is inserted into the front pilot pipe 1, and the connecting pipe 2 is rotated (if the connecting column 21 is opposite to the first groove section 111, there is no need to rotate the connecting pipe 2). The connecting pipe 2 drives the connecting column 21 to move. The connecting column 21 corresponds to the first groove section 111, and the connecting pipe 2 is pushed into the front pilot pipe 1. The connecting column 21 moves in the first groove section 111. At this time, the connecting column 21 is in the connection state. When the connecting column 21 moves to the connection between the first groove section 111 and the second groove section 112 (since the length direction of the first groove section 111 is perpendicular to the length direction of the second groove section 112), the connecting pipe 2 is rotated. The connecting pipe 2 drives the connecting column 21 to rotate, and the connecting column 21 extends into the second groove section 112. At this time, the connecting column 21 is in the stable state, and the connecting column 21 contacts the side wall of the second groove section 112, realizing the fixation between the connecting pipe 2 and the front pilot pipe 1.

[0052] As another example, the connecting column 21 can be a high-strength steel bar. In this way, on the one hand, the fixing strength between the front pilot pipe 1 and the connecting pipe 2 can be improved to prevent the separation between the connecting pipe 2 and the front pilot pipe 1 during the grouting of the building; on the other hand, the high-strength steel bar is construction waste on site, and the convenient material taking helps to save the grouting cost.

[0053] In some embodiments, the side of the second groove section 112 away from the first groove section 111 has an arc section 1121, wherein the radian of the arc section 1121 is matched with the radian of the connecting column 21. With such a setting, the connecting column 21 in the stable state can be stably arranged in the second groove section 112, thereby improving the connection strength between the connecting pipe 2 and the front pilot pipe 1.

[0054] It can be understood that in some other embodiments, at least two elastic blocks can also be arranged on the side of the second groove section 112 away from the second groove section 112. There is a passing gap for the connecting column 21 between the oppositely arranged elastic blocks. When the connecting column 21 enters the second groove section 112 from the first groove section 111, the connecting column 21 is continuously rotated. The movement of the connecting column 21 drives the elastic blocks to deform. At this time, the gap between the oppositely arranged elastic blocks increases, and the connecting column 21 can continue to move. When the connecting column 21 moves to a certain position, the elastic blocks return to move, and the elastic blocks are in tight contact with the connecting column 21 to further fix the connecting column 21 better in the second groove section 112, thereby further improving the connection strength between the connecting pipe 2 and the front pilot pipe 1.

[0055] In some embodiments, there are multiple clamping components 3, and the multiple clamping components 3 are evenly distributed along the circumferential direction of the connecting pipe 2. By providing the multiple clamping components 3, the fixation between different potentials of the connecting pipe 2 and the advanced small duct 1 can be achieved, so that the fixing force between the connecting pipe 2 and the advanced small duct 1 can be further balanced, and the fixing effect between the connecting pipe 2 and the advanced small duct 1 can be improved.

[0056] The following takes the case where the clamping component 3 is set to two for detailed description. It can be understood that in other embodiments, the number of the clamping components 3 is limited to this.

[0057] When the clamping component 3 is set to two, refer to Figure 1 、 Figure 2 , two connecting columns 21 are provided on the connecting pipe 2. Correspondingly, the tail of the advanced small duct 1 has clamping grooves 11 (the clamping grooves 11 include a first groove section 111 and a second groove section 112) corresponding to the two connecting columns 21. When it is necessary to connect the connecting pipe 2 and the advanced small duct 1, the connecting pipe 2 is moved closer to the advanced small duct 1. The movement of the connecting pipe 2 drives the two connecting columns 21 to move. The two connecting columns 21 extend into their respective corresponding first groove sections 111. When the connecting column 21 is about to enter the second groove section 112, the connecting pipe 2 is rotated. The connecting pipe 2 drives the two connecting columns 21 to move, and the two connecting columns 21 enter their respective corresponding second groove sections 112, realizing the fixation between the connecting pipe 2 and the advanced small duct 1.

[0058] As an example, in this embodiment, the two connecting columns 21 can be integrally designed.

[0059] In some embodiments, the sealing component 4 includes a sealing bladder 41, a hydraulic press 42, and a hydraulic pipe 43; the connecting pipe 2 has a liquid inlet 22; the sealing bladder 41 has a sealing state; in the sealing state, a part of the connecting pipe 2 extends into the advanced small duct 1, the sealing bladder 41 is wound around the connection position of the connecting pipe 2 and the advanced small duct 1, and the sealing bladder 41 is in an inflated state; one end of the hydraulic pipe 43 is connected to the sealing bladder 41, and the other end is connected to the hydraulic press 42.

[0060] It can be understood that in the disclosed embodiment, the diameter of the connecting pipe 2 is smaller than the diameter of the advanced small duct 1. When the connecting pipe 2 extends into the advanced small duct 1, there is a certain gap between the advanced small duct 1 and the connecting pipe 2, and this gap will have a certain impact on the grouting of the building. The sealing component 4 provided in the present disclosure can seal the gap between the advanced small duct 1 and the connecting pipe 2 to reduce the impact on the building grouting.

[0061] Specifically, when the connecting pipe 2 extends into the advanced small duct 1 and the fixation between the connecting pipe 2 and the advanced small duct 1 is completed, the sealing capsule 41 is wound around the position where there is a gap between the advanced small duct 1 and the connecting pipe 2. After the sealing capsule 41 is wound, the hydraulic press 42 is turned on. The hydraulic press 42 pumps hydraulic oil into the sealing capsule 41 through the hydraulic pipe 43. At this time, the sealing capsule 41 is in an expanded state, and the expanded sealing capsule 41 seals the gap between the connecting pipe 2 and the advanced small duct 1, thereby achieving the sealing between the connecting pipe 2 and the advanced small duct 1.

[0062] In some embodiments, referring to Figure 2 , the sealing assembly 4 further includes a hydraulic valve 44; the hydraulic valve 44 is provided on the hydraulic pipe 43. The provided hydraulic valve 44 can better control the hydraulic oil in the hydraulic press 42 from entering the sealing capsule 41. For example, when it is necessary to seal the connecting pipe 2 and the advanced small duct 1, the hydraulic valve 44 and the hydraulic press 42 are turned on, and the hydraulic oil is pumped into the sealing capsule 41 through the hydraulic pipe 43, making the sealing capsule 41 in an expanded state. When it is necessary to disassemble the connecting pipe 2 and the advanced small duct 1, the hydraulic valve 44 and the hydraulic press 42 are turned on, and the hydraulic oil in the sealing capsule 41 is pumped into the hydraulic press 42 through the hydraulic pipe 43, so that the connecting pipe 2 and the advanced small duct 1 can be disassembled.

[0063] In some embodiments, the sealing capsule 41 also has a normal state. In the normal state, the distance between the side of the sealing capsule 41 close to the liquid inlet 22 and the connecting column 21 is the first distance A1; the distance between the tail of the advanced small duct 1 and the bottom wall of the second groove section 112 is the second distance A2, and the first distance A1 is greater than the second distance A2. By setting the first distance A1 greater than the second distance A2, when the connecting pipe 2 enters the advanced small duct 1, the sealing capsule 41 can be located at the position to be sealed between the connecting pipe 2 and the advanced small duct 1, so that the sealing capsule 41 can be quickly wound around the position to be sealed between the connecting pipe 2 and the advanced small duct 1, improving the grouting efficiency of the building. It can be understood that during the actual construction process, multiple advanced small ducts 1 are often distributed on the building to be grouted. Setting the sealing capsule 41 at a suitable position can greatly improve the sealing efficiency between the connecting pipe 2 and the advanced small duct 1, and thus greatly improve the grouting efficiency of the building.

[0064] The following is a detailed introduction to this grouting method:

[0065] Referring to Figure 3 , in the embodiments of the present disclosure, this grouting method includes:

[0066] S1: A clamping groove 11 is formed at the tail of the advanced small duct 1. The clamping groove 11 includes a first groove section 111 and a second groove section 112.

[0067] Specifically, use a grooving device (for example, a cutting machine; it should be noted that the grooving device is not limited to this), and open a first groove section 111 along the length direction of the advanced small duct 1. Among them, the distance between the side walls of the first groove section 111 is greater than the diameter of the connecting column 21, and open a second groove section 112 along the direction perpendicular to the length direction of the first groove section 111 to complete the opening of the clamping groove 11.

[0068] S2: Set a connecting column 21 on the connecting pipe 2.

[0069] Specifically, set a connecting column 21 on the connecting pipe 2. The connecting column 21 can come from on-site construction waste, such as high-strength steel bars.

[0070] S3: Insert the connecting pipe 2 into the advanced small duct 1, rotate the connecting pipe 2, and the connecting column 21 extends into the second groove section 112 through the first groove section 111, and the connecting column 21 cooperates with the second groove section 112.

[0071] S4: Adjust the sealing assembly 4, and the sealing assembly 4 seals the gap between the connecting pipe 2 and the advanced small duct 1.

[0072] Specifically, when part of the connecting pipe 2 extends into the advanced small duct 1 and the connecting column 21 is located in the second groove section 112, adjust the sealing assembly 4, and the sealing assembly 4 seals the gap between the connecting pipe 2 and the advanced small duct 1.

[0073] As an example, the sealing assembly 4 includes a sealing capsule 41, a hydraulic press 42, a hydraulic pipe 43, and a hydraulic valve 44; when sealing the gap between the connecting pipe 2 and the advanced small duct 1, wind the sealing capsule 41 around the position where there is a gap between the connecting pipe 2 and the advanced small duct 1, turn on the hydraulic press 42 and the hydraulic valve 44. At this time, the hydraulic pipe 43 is in a conducting state, and the hydraulic oil in the hydraulic press 42 enters the sealing capsule 41 to achieve the sealing of the gap between the connecting pipe 2 and the advanced small duct 1.

[0074] Similarly, when it is necessary to disassemble the connecting pipe 2 from the advanced small duct 1, turn on the hydraulic press 42 and the hydraulic valve 44. At this time, the hydraulic pipe 43 is in a conducting state, and the hydraulic oil in the sealing capsule 41 enters the hydraulic press 42. At this time, the sealing capsule 41 is in a normal state, and the connecting pipe 2 and the advanced small duct 1 can be disassembled.

[0075] S5: Turn on the grouting equipment.

[0076] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A grouting auxiliary device, used for sealingly connecting a grouting device with an advanced small conduit; characterized in that: The auxiliary device includes a connecting pipe, a clamping assembly and a sealing assembly; The connecting tube is detachably connected to the tail of the leading small catheter through the clamping assembly, and the diameter of the connecting tube is smaller than the diameter of the leading small catheter; The sealing assembly is arranged on the connecting pipe and is used for sealing the gap between the connecting pipe and the leading small conduit.

2. The grouting auxiliary device according to claim 1, characterized in that: The clamping assembly includes a connecting column; The connecting column is arranged on the connecting tube, and the axial direction of the connecting column is perpendicular to the axial direction of the connecting tube; The leading small conduit is provided with a clamping groove corresponding to the connecting column.

3. The grouting auxiliary device according to claim 2, characterized in that: The clamping groove comprises a first groove section and a second groove section connected to the first groove section; The length direction of the first slot section is the same as the length direction of the leading small conduit; The length direction of the second slot section is perpendicular to the length direction of the first slot section; Wherein, the connecting column has a connected state and a stable state. In the connected state, the connecting column is located in the first slot section; in the stable state, the connecting column is located in the second slot section.

4. The grouting auxiliary device according to claim 3, characterized in that: The second slot segment has an arc segment on a side away from the first slot segment, wherein the curvature of the arc segment matches the curvature of the connecting column.

5. The grouting auxiliary device according to claim 1, characterized in that: There are multiple clamping assemblies, and the multiple clamping assemblies are evenly distributed along the circumference of the connecting pipe.

6. The grouting auxiliary device according to claim 3, characterized in that: The sealing assembly includes a sealing bag, a hydraulic press and a hydraulic pipe; The connecting pipe has a liquid inlet; The sealing capsule has a sealed state; In the sealed state, part of the connecting tube extends into the advanced small catheter, the sealing bag is arranged around the connecting position between the connecting tube and the advanced small catheter, and the sealing bag is in an expanded state; One end of the hydraulic pipe is connected to the sealing bag, and the other end is connected to the hydraulic press.

7. The grouting auxiliary device according to claim 6, characterized in that: The sealing assembly also includes a hydraulic valve; The hydraulic valve is arranged on the hydraulic pipe.

8. The grouting auxiliary device according to claim 6, characterized in that: The sealing capsule also has a normal state, in which the distance between the sealing capsule near the liquid inlet and the connecting column is a first distance; The distance between the tail of the leading small guide tube and the bottom wall of the second slot section is the second distance, and the first distance is greater than the second distance.

9. A grouting method, characterized in that: The grouting method includes: A mounting groove is provided at the tail of the leading small conduit, wherein the mounting groove comprises a first groove section and a second groove section; A connecting column is arranged on the connecting pipe; Insert the connecting tube into the advanced small catheter, rotate the connecting tube, and the connecting column extends into the second slot section through the first slot section, and the connecting column cooperates with the second slot section; Adjusting the sealing assembly, wherein the sealing assembly seals the gap between the connecting pipe and the leading small conduit; Turn on the grouting equipment.

10. The grouting method according to claim 9, characterized in that: A mounting groove is provided at the tail of the leading small catheter. When the mounting groove includes a first groove section and a second groove section, an arc section is provided on a side of the second groove section away from the first groove section. The curvature of the arc section matches the curvature of the connecting column.

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