Seal anti-receding device for pipe piece grouting hole and grouting method adopting device

Abstract

The invention relates to the technical field of tunnel engineering, in particular to a sealing anti-receding device for a pipe piece grouting hole and a grouting method adopting the sealing anti-receding device. The device comprises a grouting pipe and a sealing plug, an opening is formed in the end, facing a tunnel, of the grouting pipe, the sealing plug is arranged in the opening, the sealing plug comprises a stud and a cap, a mounting groove is formed in the cap, a destructible anti-retreating clamping ring is arranged on the mounting groove, and the sealing plug is arranged in the stud. A mounting groove is formed in the grouting pipe, a limiting structure used for fixing the anti-retreat clamping ring is arranged on the mounting groove, a first anti-retreat tooth set is formed on the anti-retreat clamping ring, a second anti-retreat tooth set corresponding to the first anti-retreat tooth set is arranged on the grouting pipe, and the hardness and the strength of the anti-retreat clamping ring and the hardness and the strength of the first anti-retreat tooth set are both lower than those of the second anti-retreat tooth set. The two anti-retreating tooth sets are matched with each other to improve the anti-loosening and retreating capacity of the sealing plug, the sealing plug can be taken out under the condition that the grouting pipe is not damaged through the destructible anti-retreating clamping ring, and the operation and maintenance difficulty and cost are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering, and in particular to a sealing and anti-retraction device for a grouting hole of a pipe segment and a grouting method using the device. Background Art

[0002] In the construction of shield tunnels, it is usually necessary to drill holes in the shield segments for wall grouting to stop water or reinforce them. At present, the commonly adopted technical solution is to pre-embed the grouting pipe in the segment structure and set a grouting check valve and a grouting hole sealing plug. When grouting is required behind the segment wall, the check valve is installed first, and then the outer concrete layer of the pre-embedded grouting pipe needs to be drilled for grouting. After the operation of the shield tunnel, the sealing plug (screw cap) may fall off under long-term external water pressure and train vibration, resulting in obvious water leakage and even gushing in the tunnel, which poses a great challenge to operational safety. In order to avoid the risk of sealing plugs falling off, some operating lines require the cancellation of all sealing plugs and the use of micro-expansion cement slurry for plugging instead. However, the micro-expansion cement hole sealing solution is difficult to detect the filling material and filling density in the hole. Large-scale adoption makes it difficult to ensure the construction quality of each grouting hole. There are still situations where the sealing cement slurry is of poor quality or shrinks, resulting in leakage or even the entire cement slurry being flushed out, and the risk is still uncontrollable.

[0003] Therefore, the sealing device of the segment grouting pipe still has much room for improvement and optimization in terms of sealing performance and convenience of inspection and maintenance. Summary of the invention

[0004] In order to solve the problem that the sealing plugs of grouting holes are prone to loosening and leakage, the present invention provides a sealing and anti-retreat device for the grouting holes of pipe segments and a grouting method using the device, which has the comprehensive advantages of reliable sealing and waterproof performance, anti-loosening and anti-retreat, no fear of vibration, easy inspection and maintenance.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a sealing and anti-retreat device for grouting holes of pipe segments, comprising a grouting pipe and a sealing plug, wherein one end of the grouting pipe facing the tunnel is an opening, and the sealing plug is arranged in the opening, and the sealing plug comprises a stud screwed to the opening and a cap arranged at the end of the stud, the cap is provided with a mounting groove, a destructible anti-retreat clamping ring is provided in the mounting groove, a limiting structure for fixing the anti-retreat clamping ring is provided in the mounting groove, an anti-retreat tooth group 1 is formed on the end surface of the anti-retreat clamping ring facing the grouting pipe, and an anti-retreat tooth group 2 corresponding to the anti-retreat tooth group 1 is provided on the grouting pipe, and the hardness and strength of the anti-retreat clamping ring and its anti-retreat tooth group 1 are lower than the hardness and strength of the anti-retreat tooth group 2.

[0006] Preferably, the second anti-recession tooth group and the grouting pipe are integrally formed.

[0007] Preferably, the second anti-backlash tooth group and the first anti-backlash tooth group both include a plurality of latching teeth, and the angle between the tooth surface on one side of the latching teeth of the first anti-backlash tooth group facing away from the screw-in direction and the reference plane is greater than the angle between the tooth surface on the other side and the reference plane.

[0008] Preferably, the limiting structure comprises an annular groove formed on a side wall of the mounting groove, and a convex ring matched with the annular groove is provided on the side wall of the anti-retraction clamping ring.

[0009] Preferably, the limiting structure further comprises at least two limiting blocks protruding from the bottom of the mounting groove, and the bottom of the anti-retraction clamping ring is provided with a limiting groove matched with the limiting blocks.

[0010] Preferably, the limiting grooves are symmetrically arranged on the anti-retraction clamping ring, and the limiting blocks are symmetrically arranged on the mounting groove.

[0011] Preferably, the limiting block is arranged at the bottom of the mounting groove and extends radially along the cap.

[0012] Preferably, a water-stop rubber ring that swells when exposed to water is provided on the peripheral wall of the sealing plug.

[0013] Preferably, a first mark is provided on the anti-retraction clamp ring, and a second mark is provided on the sealing plug, and the first mark is configured to be aligned with the second mark when the sealing plug is tightened.

[0014] The present invention also provides a grouting method using a sealing anti-recoil device, wherein the sealing anti-recoil device is a sealing anti-recoil device for a grouting hole of a pipe segment as described in any one of the above, and the grouting method comprises the following steps:

[0015] Before grouting, a temporary pipe sleeve is screwed into the pre-buried grouting pipe, one end of the temporary pipe sleeve is provided with an external thread matched with the opening of the grouting pipe, the length of the external thread is greater than or equal to the length of the stud of the sealing plug, the hardness and strength of the temporary pipe sleeve are greater than the hardness and strength of the grouting pipe, and when screwing in, ensure that the external thread of the temporary pipe sleeve is completely screwed into the grouting pipe, and then carry out the grouting operation;

[0016] After the grouting operation is completed, the temporary pipe sleeve is taken out, and then the sealing plug is screwed into the grouting pipe. When the anti-recession tooth group 1 and the anti-recession tooth group 2 abut against each other, the installation is completed.

[0017] Compared with the prior art, the present invention has the following advantages: by arranging a destructible anti-retreat clamp ring on the sealing plug, and respectively arranging anti-retreat tooth groups on the anti-retreat clamp ring and the grouting pipe, the two groups of anti-retreat tooth groups cooperate with each other to improve the ability of the sealing plug to prevent loosening and anti-retreat, the destructible anti-retreat clamp ring makes it possible to remove the sealing plug without damaging the grouting pipe, and a new sealing plug can be used for resealing, the effect of the secondary sealing is almost the same as that of the initial sealing, which greatly reduces the difficulty of operation and maintenance, significantly reduces the cost of tunnel repair and maintenance, and has obvious economic benefits over the entire life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a sealing device for a segment grouting pipe provided by an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of a tube body provided by an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of a tail plug provided by an embodiment of the present invention;

[0022] Figure 4 is an isometric view of a sealing plug provided by an embodiment of the present invention;

[0023] Figure 5 is a half-section schematic diagram of a sealing plug provided by an embodiment of the present invention;

[0024] Figure 6 yes Figure 5 A local enlarged schematic diagram of the middle A;

[0025] Figure 7 is a schematic structural diagram of an anti-retraction clamp ring provided in an embodiment of the present invention;

[0026] Figure 8 It is a structural schematic diagram of installing a temporary pipe sleeve of the present invention.

[0027] List of reference numerals:

[0028] 100, grouting pipe; 110, pipe body; 120, tail plug; 130, anti-retraction tooth group 2; 140, opening;

[0029] 200, sealing plug; 210, stud; 220, cap; 221, mounting groove; 222, annular groove; 223, stopper; 240, second mark;

[0030] 300, anti-retraction collar; 310, anti-retraction tooth set 1; 320, convex ring; 330, limiting groove; 350, first mark;

[0031] 400, water-swelling water-stop rubber ring;

[0032] 500, temporary pipe sleeve;

[0033] 600. Check valve. DETAILED DESCRIPTION

[0034] The accompanying drawings are only used for illustrative purposes and should not be construed as limiting the present invention; it should be clear that the embodiments described are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0035] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0036] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, in the description of this application, unless otherwise specified, "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0038] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0039] like Figure 1-7As shown, in order to solve the problems and hidden dangers existing in the sealing device of the current segment grouting pipe when sealing the segment grouting hole, and to make it have the comprehensive advantages of reliable sealing and waterproof performance, anti-loosening and anti-retreat, not afraid of vibration, easy to check and maintain, the present embodiment discloses a sealing and anti-retreat device for the segment grouting hole, which can be applied to the sealing technical solutions of various types of pre-buried grouting holes of the segments, and can also be used in the top pipe joints, prefabricated structures, open-cut structures and other parts that need to pre-buried grouting pipes to facilitate the later grouting behind the wall and the board; the sealing and anti-retreat device for the segment grouting hole includes a grouting pipe 100 and a sealing plug 200, and the grouting pipe 100 includes a tail plug 120, a pipe body 110 and a check valve 600. One end of the pipe body 110 is an opening 140, and the other end is connected to the tail plug 120. The pipe body 110 is provided with threads extending from the opening 140 to the tail plug 120, about 8 internal threads. The pipe body 110 is pre-buried in the pipe segment structure during the production of the pipe segment, and the opening 140 faces the inner side of the pipe segment. The pipe body 110 should be made of polyamide (PA) and other materials with high hardness, corrosion resistance and wear resistance (such as engineering plastics such as polyimide and polyurethane or composite materials such as carbon fiber and polymer). The external structure is provided with a protrusion to ensure sufficient grip with concrete, and a water-proof rubber ring is provided at the interface with the grouting tail plug 120. The tail plug 120 is a tubular structure, connected to the pipe body 110, and the end of the tail plug 120 away from the pipe body 110 is closed. The tail plug 120 is pre-buried in the pipe segment structure during the production of the pipe segment, and it is advisable to use polypropylene (PP) and other materials with certain flexibility, corrosion resistance and water-proof performance (such as polyethylene, polyvinyl chloride, chlorinated polyethylene, etc.). The check valve 600 is provided with threads on the outside, which match the threads in the pipe body 110. It is arranged in the pipe body 110 and close to one end of the tail plug 120. It should be made of copolymer polypropylene (PP-R) and other materials with certain toughness, taking into account elastic deformation and strength. It must be installed in advance before opening the hole for grouting. The raft flap is expanded without being damaged during grouting drilling, and is pressed back and closed when the slurry converges, thereby preventing the grouting slurry from entering the interior of the pipe body 110.

[0040] like Figure 4As shown, the sealing plug 200 includes a stud 210 and a cap 220. The cap 220 is provided as a base. The stud 210 is provided with 5 threads, which match the internal threads of the tube body 110. The sealing plug 200 is screwed to one end of the opening 140 of the tube body 110 through the stud 210. In order to ensure that the sealing plug 200 does not loosen under the action of long-term vibration, an anti-backward tooth group 1 310 is provided on the cap 220 of the sealing plug 200, and an anti-backward tooth group 2 130 is also provided on the grouting pipe 100; the anti-backward tooth group 1 310 and the anti-backward tooth group 2 130 are both annular, and the anti-backward tooth group 1 310 and the anti-backward tooth group 2 130 are composed of a plurality of teeth, and the angle between the tooth surface on one side of a single tooth and the reference plane is greater than the angle between the tooth surface on the other side and the reference plane, that is, The pressure angles of the meshing tooth surfaces on both sides of a single latch tooth are different, so that the latch teeth in the tooth group are arranged in a protruding step-like shape, that is, slopes of different angles and lengths are formed on both sides of the latch teeth. The arrangement directions of the latch teeth in the anti-backlash tooth group 1 310 and the anti-backlash tooth group 2 130 are opposite. When the anti-backlash tooth group 1 310 and the anti-backlash tooth group 2 130 are meshed, the sealing plug 200 can only rotate in one direction, which can ensure that the sealing plug 200 will not reverse under long-term vibration, thereby achieving the effect of not loosening and not failing. In addition to the latch teeth, the anti-backlash tooth group can be a one-way tooth structure such as a ratchet or a wedge-shaped tooth.

[0041] like Figure 5 , 6 As shown, in order to enhance the waterproof sealing performance of the sealing plug 200, a groove is further provided on the outer edge of the cap 220 of the sealing plug 200, on which a water-swellable waterproof rubber ring 400 can be installed. The tightly engaged screw threads and the water-swellable waterproof rubber ring 400 can ensure that no leakage will occur and failure will not occur under the long-term action of the designed water pressure of the sealing plug 200.

[0042] Furthermore, in order to facilitate the subsequent operation and maintenance random inspection and confirmation, a destructible anti-retraction collar 300 is provided on the sealing plug 200; a mounting groove 221 is provided at the edge of the cap 220 close to the stud 210, and the anti-retraction collar 300 is sleeved on the mounting groove 221 of the cap 220, such as Figure 7As shown, the anti-backward tooth group 1 310 is arranged on the anti-backward clamp ring 300 and is integrated. The hardness and strength of the anti-backward tooth group 1 310 are lower than the hardness and strength of the anti-backward tooth group 2 130. The anti-backward clamp ring 300 and the anti-backward tooth group 1 310 should be made of copolymer polypropylene (PP-R) and other materials with certain toughness, taking into account elastic deformation and strength; at the same time, in order to improve the strength of the anti-backward tooth group 2 130, the anti-backward tooth group 2 130 and the pipe body 110 of the grouting pipe 100 are set to be integrated; when it is found that the wall of the pipe segment is not filled with dense cavities, etc., and it is necessary to open the grouting hole again for grouting, Mechanical equipment is used to reverse the sealing plug 200. Since the hardness and strength of the grouting pipe 100 and the anti-backward tooth group 130 are greater than the hardness and strength of the anti-backward tooth group 1 310 and the anti-backward clamp ring 300, the anti-backward tooth group 1 310 and the anti-backward clamp ring 300 should form a weak point when assembled with the sealing plug 200. As the torque applied to the sealing plug 200 continues to increase, the grouting pipe 100 and the anti-backward tooth group 130 are not greatly affected, while the anti-backward tooth group 1 310 will quickly reach the critical point of collapse. After the anti-backward tooth group 1 310 is damaged, the sealing plug 200 can be taken out for grouting. After the grouting is completed, a new sealing plug 200 can be used for plugging again, while the grouting pipe 100 and the anti-backward tooth group 130 are not damaged. The effect of the secondary plugging is almost the same as that of the first plugging, which greatly reduces the difficulty of operation and maintenance, significantly reduces the cost of tunnel repair and maintenance, and has obvious economic benefits throughout the life cycle. The mounting groove 221 is in the entire ring shape in this embodiment, but may also be a ring segment, or may not be a ring shape, or may be a plurality of mounting grooves 221 in other forms.

[0043] Furthermore, in order to improve the convenience of subsequent operational maintenance and random inspections, a first mark 350 is set on the anti-retraction clamp 300, and a second mark 240 is set on the sealing plug 200. When the anti-retraction clamp 300 and the sealing plug 200 are fully assembled, the first mark 350 and the second mark 240 are aligned. During maintenance, whether the sealing plug 200 has retreated and the degree of retreat can be determined by the deviation between the first mark 350 and the second mark 240.

[0044] Furthermore, a limiting structure is provided between the anti-backward clamp ring 300 and the sealing plug 200 to prevent them from moving up and down and rotating, so that the anti-backward clamp ring 300 and the anti-backward tooth group can play the function of preventing the sealing plug 200 from backing out.

[0045] An inwardly recessed annular groove 222 is provided on the side wall of the mounting groove 221 , and an annular convex ring 320 is convexly provided on one side of the inner diameter of the anti-retraction clamp 300 . The size and shape of the convex ring 320 correspond to those of the annular groove 222 . When the anti-retraction clamp 300 is assembled with the sealing plug 200, the anti-retraction tooth group 1 310 of the anti-retraction clamp 300 is facing upwards, and the stud 210 on the sealing plug 200 passes through the inner ring of the anti-retraction clamp 300, and the convex ring 320 of the anti-retraction clamp 300 is inserted into the annular groove 222 of the cap 220, so that the anti-retraction clamp 300 and the sealing plug 200 are assembled; when the sealing plug 200 is about to be withdrawn in an adverse environment, the side wall of the annular groove 222 and the side wall of the convex ring 320 will abut against each other, and the annular groove 222 and the convex ring 320 cooperate with each other to limit the upward and downward movement of the anti-retraction clamp 300 and the sealing plug 200, thereby preventing the anti-retraction tooth group 2 130 and the anti-retraction tooth group 1 310 from moving up and down and causing separation, so that the anti-retraction clamp 300 can be separated from the sealing plug 200.

[0046] On this basis, in order to allow the anti-retraction clamp 300 to be smoothly inserted into the annular groove 222, the bottom of the anti-retraction clamp 300 and the edge of the convex ring 320 can be rounded or chamfered, or the same rounding or chamfering can be done on the sealing plug 200.

[0047] In order to prevent the anti-retraction clamp 300 and the sealing plug 200 from rotating relative to each other and enable the anti-retraction clamp 300 and the anti-retraction tooth group 1 310 to better act on the sealing plug 200, a limit block 223 is convexly provided at the bottom of the installation groove 221, and a limit groove 330 matched with the limit block 223 is provided at the bottom of the anti-retraction clamp 300. The size and shape of the limit block 223 correspond to the size and shape of the limit groove 330. The limit groove 330 and the limit block 223 cooperate with each other to limit the anti-retraction clamp 300 and the sealing plug 200 from rotating up and down, thereby preventing the anti-retraction tooth group 2 130 and the anti-retraction tooth group 1 310 from separating.

[0048] When the locking cam 300 is in a state of being locked, the locking cam 300 and the locking cam 300 are in a state of being locked together.

[0049] In order to make the limit block 223 and the limit groove 330 play a more stable role, two limit grooves 330 are set. There should not be too many limit grooves 330 to prevent the connection between the anti-retraction clamp ring 330 and the sealing plug 200 from being difficult to destroy. The limit grooves 330 are symmetrically arranged on the anti-retraction clamp ring 300, and the corresponding limit blocks 223 are also symmetrically arranged on the installation groove 221. In this way, the anti-retraction clamp ring 300 can better prevent the sealing plug 200 from rotating backwards, and during subsequent maintenance, the sealing plug 200 can also better apply force to the anti-retraction clamp ring 300 to destroy the anti-retraction clamp ring 300 and replace the sealing plug 200.

[0050] Furthermore, the limit block 223 is arranged at the bottom of the installation groove 221 and extends radially along the cap 220, so that the limit block 223 is a long strip extending radially along the cap 220. When reversely twisted, the sealing plug 200 can better exert a force on the anti-retraction ring 300 to destroy the anti-retraction ring 300 and replace the sealing plug 200.

[0051] In order to avoid contamination of the thread of the grouting pipe 100 during the grouting operation, resulting in a decrease in the sealing performance of the sealing plug 200, as shown in FIG. Figure 8 As shown, an embodiment of the present invention further provides a grouting method using a sealing and anti-recoil device for a segment grouting hole, the construction process of which is applicable to the sealing and anti-recoil device for a segment grouting hole of any of the above embodiments, comprising:

[0052] A reusable temporary pipe sleeve 500 is provided with an external thread matched with the opening 140 of the grouting pipe 100 at one end of the temporary pipe sleeve 500, and the length of the external thread is greater than or equal to the length of the stud 210. The hardness and strength of the temporary pipe sleeve 500 are greater than the hardness and strength of the grouting pipe 100. The temporary pipe sleeve 500 is preferably made of steel to ensure its strength. The number of thread turns is consistent with that of the permanent sealing plug 200. External hexagonal, external thread and other connection methods are provided to ensure that it can be completely unscrewed and reused after grouting is completed.

[0053] Before grouting, a temporary pipe sleeve 500 is installed on the pre-buried grouting pipe 100 to ensure that the external threads of the temporary pipe sleeve 500 are all screwed into the grouting pipe 100, and then the grouting operation is performed. During grouting, the other end of the temporary pipe sleeve 500 that is not screwed into the grouting pipe 100 can be used to connect a fixed grouting ball valve or other device. If a small amount of water or slurry overflows during grouting, the thread will not be contaminated by the slurry under the protection of the temporary pipe sleeve 500.

[0054] After the grouting is completed, the temporary pipe sleeve 500 is taken out, and then the sealing plug 200 is screwed into the grouting pipe 100. When the anti-recession tooth group 1 310 and the anti-recession tooth group 2 130 abut against each other, the installation is completed. According to the construction arrangement, after the permanent sealing plug 200 is prepared, the temporary pipe sleeve 500 is screwed out, and then the sealing plug 200 is installed immediately. The screwed out temporary pipe sleeve 500 can be used at the next segment opening grouting location. As a supporting device for the segment grouting pipe 100, the sleeve can be used in combination with the grouting equipment, which can effectively protect the screw thread from damage and contamination, and ensure that the subsequent installation of the sealing plug 200 is smooth and reliable.

[0055] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A sealing and anti-retraction device for a grouting hole of a pipe segment, comprising a grouting pipe (100) and a sealing plug (200), wherein one end of the grouting pipe (100) facing the tunnel is an opening (140), the sealing plug (200) is arranged in the opening (140), the sealing plug (200) comprises a stud (210) screwed to the opening (140) and a cap (220) arranged at the end of the stud (210), characterized in that: The cap (220) is provided with a mounting groove (221), a destructible anti-retreat clamping ring (300) is provided in the mounting groove (221), a limiting structure for fixing the anti-retreat clamping ring (300) is provided in the mounting groove (221), an anti-retreat tooth group (310) is formed on the end surface of the anti-retreat clamping ring (300) facing the grouting pipe (100), and an anti-retreat tooth group (130) corresponding to the anti-retreat tooth group (310) is provided on the grouting pipe (100), and the hardness and strength of the anti-retreat clamping ring (300) and its anti-retreat tooth group (310) are both lower than the hardness and strength of the anti-retreat tooth group (130).

2. The sealing and anti-retraction device for the grouting hole of the pipe segment according to claim 1 is characterized in that: The second anti-recession tooth group (130) and the grouting pipe (100) are integrally formed.

3. The sealing and anti-retraction device for the grouting hole of the pipe segment according to claim 1 is characterized in that: The second anti-backlash tooth group (130) and the first anti-backlash tooth group (310) both include a plurality of latching teeth, and the angle between the tooth surface on one side of the latching teeth of the first anti-backlash tooth group (310) facing away from the screw-in direction and the reference plane is greater than the angle between the tooth surface on the other side and the reference plane.

4. The sealing and anti-recoil device for the grouting hole of the pipe segment according to claim 1, characterized in that: The limiting structure comprises an annular groove (222) formed on the side wall of the installation groove (221), and a convex ring (320) adapted to the annular groove (222) is provided on the side wall of the anti-retraction clamping ring (300).

5. The sealing and anti-retraction device for the grouting hole of the pipe segment according to claim 4 is characterized in that: The limiting structure also includes at least two limiting blocks (223) protruding from the bottom of the installation groove (221), and the bottom of the anti-retraction clamping ring (300) is provided with a limiting groove (330) adapted to the limiting blocks (223).

6. The sealing and anti-recoil device for the grouting hole of the pipe segment according to claim 5, characterized in that: The limiting groove (330) is symmetrically arranged on the anti-retraction clamping ring (300), and the limiting block (223) is symmetrically arranged on the installation groove (221).

7. The sealing and anti-recoil device for the grouting hole of the pipe segment according to claim 5, characterized in that: The limiting block (223) is arranged at the bottom of the mounting groove (221) and extends along the radial direction of the cap (220).

8. The sealing and anti-recoil device for the grouting hole of the pipe segment according to claim 1, characterized in that: A water-swellable waterproof rubber ring (400) is provided on the peripheral wall of the sealing plug (200).

9. The sealing and anti-recoil device for the grouting hole of the pipe segment according to claim 1, characterized in that: The anti-retraction collar (300) is provided with a first mark (350), and the sealing plug (200) is provided with a second mark (240), and the first mark (350) is configured to be aligned with the second mark (240) when the sealing plug (200) is tightened.

10. A grouting method using a sealing anti-recession device, characterized in that: The sealing and anti-recoil device is a sealing and anti-recoil device for a segment grouting hole according to any one of claims 1 to 9, and the grouting method comprises the following steps: Before grouting, a temporary pipe sleeve (500) is screwed into the pre-buried grouting pipe (100), one end of the temporary pipe sleeve (500) is provided with an external thread matched with the opening (140) of the grouting pipe (100), the length of the external thread is greater than or equal to the length of the stud (210) of the sealing plug (200), the hardness and strength of the temporary pipe sleeve (500) are greater than the hardness and strength of the grouting pipe (100), and when screwing in, ensure that the external thread of the temporary pipe sleeve (500) is completely screwed into the grouting pipe (100), and then carry out the grouting operation; After the grouting operation is completed, the temporary pipe sleeve (500) is removed, and then the sealing plug (200) is screwed into the grouting pipe (100). When the anti-recession tooth group 1 (310) and the anti-recession tooth group 2 (130) are in contact with each other, the installation is completed.

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