Single-hole multi-tube synchronous grouting self-locking sealing device and method

Abstract

The present invention discloses a self-locking sealing device and method for synchronous grouting of single-hole multi-tubes. The device comprises an orifice sleeve, a cover, a grouting pipe, a connecting ring, a sealing ring, a slurry stop valve joint, and an annular locking buckle. The cover is provided with a through hole for each grouting pipe to pass through. The orifice sleeve is pre-buried in the slurry stop wall. The cover and the orifice sleeve are detachably connected by the annular locking buckle. Each connecting ring is located at the through hole and is detachably connected to the slurry inlet end of each corresponding grouting pipe. Each grouting pipe passes through the corresponding through hole and extends into the same grouting hole. The slurry outlet end of each grouting pipe is located at a cross-sectional position of different depths in the same grouting hole. The sealing ring is sleeved on the corresponding grouting pipe and forms a seal between the grouting pipe and the corresponding through hole. Each slurry stop valve joint is detachably connected to the corresponding connecting ring. The method is carried out using the above-mentioned self-locking sealing device for synchronous grouting of single-hole multi-tubes. The invention has the advantages of low cost, can achieve synchronization of grouting time at each cross-sectional position of the grouting hole, and can improve grouting efficiency and grouting quality.

Description

Technical Field

[0001] The present invention mainly relates to a tunnel grouting construction technology, and in particular to a single-hole multi-tube synchronous grouting self-locking sealing device and method. Background Art

[0002] Grouting reinforcement for tunnels requires first creating an opening and drilling a hole in the open surface of the rock (or soil) layer. Grouting pipes are then installed within the hole for grouting reinforcement. Before grouting, the grouting pipe and the drilled hole must be sealed at the opening to prevent grout from overflowing. Currently, anchoring agents are often used for this purpose, but their operation is highly arbitrary, making quality assurance difficult and often leading to grout leakage during the grouting process.

[0003] Furthermore, when grouting pressure is high, the free surface of the tunnel rock (soil) layer may even bulge under the enormous grouting pressure. Therefore, a grouting stop wall is often required to prevent the free surface of the rock (soil) layer from bulging. In this case, the use of anchoring agents to seal the pipe opening will fail because it cannot withstand the huge pressure inside the pipe, resulting in leakage. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a single-hole multi-tube synchronous grouting self-locking sealing device and method which is low-cost, can synchronize the grouting time of each cross-section position of the grouting hole, and can improve the grouting efficiency and grouting quality.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A single-hole multi-tube synchronous grouting self-locking sealing device comprises an orifice sleeve, a sealing cover, multiple grouting pipes of different lengths, connecting rings matching the number of grouting pipes, sealing rings matching the number of grouting pipes, slurry stop valve joints matching the number of grouting pipes, and an annular locking buckle. The sealing cover is provided with through holes matching the number of grouting pipes for the passage of each grouting pipe. The orifice sleeve is pre-buried in the slurry stop wall. The sealing cover and the orifice sleeve are detachably connected through the annular locking buckle. Each connecting ring is located at a corresponding through hole and is detachably connected to the slurry inlet end of each corresponding grouting pipe. Each grouting pipe passes through the corresponding through hole and extends into the same grouting hole. The slurry outlet end of each grouting pipe is located at a cross-sectional position of different depth in the same grouting hole. The sealing ring is sleeved on the corresponding grouting pipe and forms a seal between the grouting pipe and the corresponding through hole. Each slurry stop valve joint is detachably connected to the corresponding connecting ring.

[0007] As a further improvement of the above technical solution:

[0008] The grouting pipe comprises a pipe body, one end of which is provided with an external thread for connecting a connecting ring and the other end is sealed. A plurality of overflow holes are provided on the pipe body near the seal along the circumferential direction.

[0009] The sealing end of the tube body adopts a cone structure.

[0010] The tube body is formed with a retaining ring at a position close to the external thread thereof, and the retaining ring cooperates with the end of the sealing cover to clamp the sealing ring.

[0011] The embedded end of the orifice sleeve is provided with a plurality of latch teeth along the circumferential direction.

[0012] The exposed end of the orifice sleeve is provided with a first clamping ring for cooperating with an annular lock buckle for locking.

[0013] A second clamping ring for cooperating with an annular lock buckle for locking is provided at one end of the sealing cover away from the through hole.

[0014] The bottom of the second clamping ring is provided with a circle of inserting ring for tightly contacting with the inner wall of the exposed end of the orifice sleeve.

[0015] The annular lock buckle includes a rubber ring and a closable lock ring. The rubber ring is wrapped around the outside of the first clamping ring and the second clamping ring. The lock ring is clamped on the outside of the rubber ring and locked.

[0016] The locking ring includes a pair of half rings hinged to each other, each half ring is provided with a ring groove for embedding the rubber ring, and a locking plate is provided at the end of each half ring, one of the locking plates is hinged with a locking piece, and the other locking plate is provided with a locking groove for the locking piece to be clamped and locked.

[0017] The locking member includes a bolt and a nut arranged on the bolt. The bolt is hinged to the corresponding locking plate. After the bolt is rotated into the locking groove, it is locked by the nut.

[0018] A pressure ring is provided on the outer surface of one end of the connecting ring close to the sealing cover.

[0019] An end of the connecting ring close to the pressure ring is provided with an internal thread for matching with the external thread of the grouting pipe body.

[0020] An end of the connecting ring away from the pressure ring is provided with an internal thread for connecting to a slurry stop valve joint.

[0021] The ring body of the connecting ring is configured as a polygonal ring body for facilitating tightening or loosening of the connecting ring.

[0022] One end of the slurry stop valve joint close to the connecting ring is provided with an external thread for matching the internal thread of the connecting ring, and the other end is provided with an external thread for connecting the slurry stop valve.

[0023] A hexagonal platform is provided in the middle of the slurry stop valve joint for facilitating tightening or loosening thereof.

[0024] A single-hole multi-tube synchronous grouting self-locking sealing method is performed using the single-hole multi-tube synchronous grouting self-locking sealing device described above, specifically comprising the following steps:

[0025] S1: Construct a concrete stop wall and bury the orifice casing in the stop wall;

[0026] S2: Use a drilling tool to drill through the hole casing to form a grouting hole;

[0027] S3: Put the sealing ring on the corresponding grouting pipe, and send each grouting pipe into the same grouting hole through the hole casing and ensure that the slurry outlet end of each grouting pipe is located at a cross-section position of different depths in the same grouting hole;

[0028] S4: Butt the cover to the exposed end of the orifice casing to ensure that each grouting pipe passes through the corresponding through hole;

[0029] S5: Use the annular lock buckle to lock the cover and the orifice casing and ensure that the sealing ring forms a seal between the grouting pipe and the corresponding through hole;

[0030] S6: Connect the grouting ends of the corresponding grouting pipes of each connecting ring;

[0031] S7: Connect each slurry stop valve joint to the corresponding connecting ring;

[0032] S8: inject cement slurry into the slurry stop valve joint until the grouting is completed;

[0033] S9: After the cement slurry has initially set, remove the slurry stop valve joint, connecting ring, annular lock buckle, cover and sealing ring;

[0034] S10: Clean the removed grouting valve joint, connecting ring, annular lock, cover and sealing ring and reserve them for use in the next grouting hole.

[0035] Compared with the prior art, the advantages of the present invention are:

[0036] The single-hole multi-tube synchronous grouting self-locking sealing device of the present invention first constructs a concrete grouting wall and buries an orifice casing in the grouting wall, uses a drilling tool to enter the orifice casing to drill to form a grouting hole, puts a sealing ring on the corresponding grouting pipe, and sends each grouting pipe into the same grouting hole from the orifice casing to ensure that the slurry outlet end of each grouting pipe is located at a cross-sectional position of different depths in the same grouting hole, connects the sealing cover with the exposed end of the orifice casing to ensure that each grouting pipe passes through the corresponding through hole, and uses a ring lock buckle Lock the cover and the orifice casing and ensure that the sealing ring forms a seal between the grouting pipe and the corresponding through hole, then connect the slurry inlet end of the grouting pipe corresponding to each connecting ring, connect each slurry stop valve joint with the corresponding connecting ring, and inject cement slurry into the slurry stop valve joint until the grouting is completed. After the cement slurry has initially set, remove the slurry stop valve joint, connecting ring, annular lock buckle, cover and sealing ring, and finally clean the removed slurry stop valve joint, connecting ring, annular lock buckle, cover and sealing ring and reserve them for use in the next grouting hole. Compared with the traditional method, the grouting device extends multiple grouting pipes into the same grouting hole for synchronous grouting, and the slurry outlet end of each grouting pipe is located at a cross-sectional position of different depths in the same grouting hole, thus realizing the synchronization of grouting time at each cross-sectional position of the grouting hole, greatly improving the grouting efficiency and grouting quality, and the slurry stop valve joint, connecting ring, annular lock buckle, cover and sealing ring are all detachable and can be reused, which greatly reduces the cost; further, the connection of each component and the grouting self-locking sealing function are realized through the coordination of the slurry stop valve joint, connecting ring, annular lock buckle, cover and sealing ring, and the structure is simple and the design is ingenious. The single-hole multi-tube synchronous grouting self-locking sealing method of the present invention adopts the above-mentioned single-hole multi-tube synchronous grouting self-locking sealing device for implementation, and therefore has the corresponding technical effect of the above-mentioned single-hole multi-tube synchronous grouting self-locking sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention (cut-away state).

[0038] Figure 2 It is a structural schematic diagram of the present invention in an installed state.

[0039] Figure 3 It is a schematic diagram of the three-dimensional exploded structure of the present invention in the installed state.

[0040] Figure 4 It is a structural schematic diagram of the stop slurry valve joint of the present invention.

[0041] Figure 5 It is a structural schematic diagram of the connecting ring in the present invention.

[0042] Figure 6 It is a structural schematic diagram of the sealing cover in the present invention.

[0043] Figure 7 It is a structural schematic diagram of the orifice casing in the present invention.

[0044] Figure 8 It is a schematic diagram of the installation state of the annular lock buckle in the present invention.

[0045] Figure 9 It is a schematic diagram of the installation state of the grouting pipe in the present invention.

[0046] The numbers in the figure represent:

[0047] 1. Orifice casing; 11. Clamping teeth; 12. First clamping ring; 2. Sealing cover; 21. Through hole; 22. Second clamping ring; 23. Insert ring; 3. Grouting pipe; 31. Pipe body; 311. Overflow hole; 312. Retaining ring; 4. Connecting ring; 41. Pressing ring; 5. Sealing ring; 6. Ring lock buckle; 61. Rubber ring; 62. Locking ring; 621. Half ring; 622. Ring groove; 623. Locking plate; 624. Locking piece; 6241. Bolt; 6242. Nut; 625. Locking groove; 7. Grouting valve joint; 71. Hexagonal table. DETAILED DESCRIPTION

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Figures 1 to 9The invention shows an embodiment of a single-hole multi-tube synchronous grouting self-locking sealing device, comprising an orifice casing 1, a cover 2, a plurality of grouting pipes 3 of different lengths, a connecting ring 4 matching the number of grouting pipes 3, a sealing ring 5 matching the number of grouting pipes 3, a slurry stop valve joint 7 matching the number of grouting pipes 3, and an annular lock buckle 6. The cover 2 is provided with a through hole 21 matching the number of grouting pipes 3 for each grouting pipe 3 to pass through. The orifice casing 1 is pre-buried in the grouting wall. The cover 2 is connected to the orifice casing. The pipe 1 is detachably connected by an annular locking buckle 6. Each connecting ring 4 is located at the corresponding through hole 21 and is detachably connected to the slurry inlet end of each corresponding grouting pipe 3. Each grouting pipe 3 passes through the corresponding through hole 21 and extends into the same grouting hole. The slurry outlet end of each grouting pipe 3 is located at a cross-sectional position of different depths in the same grouting hole. The sealing ring 5 is sleeved on the corresponding grouting pipe 3 and forms a seal between the grouting pipe 3 and the corresponding through hole 21. Each slurry stop valve joint 7 is detachably connected to the corresponding connecting ring 4. When in use, first construct a concrete grouting wall and bury the orifice casing 1 in the grouting wall, use a drilling tool to enter the orifice casing 1 to drill to form a grouting hole, put the sealing ring 5 on the corresponding grouting pipe 3, and send each grouting pipe 3 into the same grouting hole from the orifice casing 1 and ensure that the slurry outlet end of each grouting pipe 3 is located at a cross-sectional position of different depths in the same grouting hole, dock the cover 2 with the exposed end of the orifice casing 1, ensure that each grouting pipe 3 passes through the corresponding through hole 21, and use the annular lock buckle 6 to lock the cover 2 and the orifice casing 1. And ensure that the sealing ring 5 forms a seal between the grouting pipe 3 and the corresponding through hole 21, then connect the slurry inlet end of the grouting pipe 3 corresponding to each connecting ring 4, connect each slurry stop valve joint 7 with the corresponding connecting ring 4, and inject cement slurry into the slurry stop valve joint 7 until the grouting is completed. After the cement slurry is initially solidified, remove the slurry stop valve joint 7, connecting ring 4, annular lock buckle 6, cover 2 and sealing ring 5. Finally, clean the removed slurry stop valve joint 7, connecting ring 4, annular lock buckle 6, cover 2 and sealing ring 5 and reserve them for use in the next grouting hole. Compared with the traditional method, the grouting device extends multiple grouting pipes 3 into the same grouting hole for synchronous grouting, and the slurry outlet end of each grouting pipe 3 is located at a cross-sectional position of different depths in the same grouting hole, so that the grouting time of each cross-sectional position of the grouting hole is synchronized, which greatly improves the grouting efficiency and grouting quality, and the slurry stop valve joint 7, connecting ring 4, annular lock buckle 6, cover 2 and sealing ring 5 are all detachable and can be reused, which greatly reduces the cost; further, the connection of each component and the grouting self-locking sealing function are realized through the cooperation of the slurry stop valve joint 7, connecting ring 4, annular lock buckle 6, cover 2 and sealing ring 5, and its structure is simple and the design is ingenious.

[0050] In this embodiment, the grouting pipe 3 includes a pipe body 31. One end of the pipe body 31 is provided with an external thread for connecting to the connecting ring 4, and the other end is sealed. The pipe body 31 is provided with multiple grouting holes 311 along the circumferential direction near the seal. In this structure, a grouting structure with multiple grouting holes 311 circumferentially at the end of the pipe body 31 is adopted to ensure the balance of grouting pressure.

[0051] In this embodiment, the sealed end of the pipe body 31 adopts a cone structure. The setting of the cone structure facilitates the insertion of the grouting pipe 3 into the grouting hole and avoids damage to the end portion by collision with other components.

[0052] In this embodiment, the pipe body 31 is formed with a retaining ring 312 near its external thread. The retaining ring 312 cooperates with the end of the cover 2 to clamp the sealing ring 5. In this structure, the retaining ring 312 and the cover 2 cooperate to clamp the sealing ring 5 to achieve a seal between the grouting pipe 3 and the cover 2, ensuring a good sealing effect.

[0053] In this embodiment, the embedded end of the orifice sleeve 1 is provided with a plurality of latching teeth 11 along the circumferential direction. The provision of the latching teeth 11 can play a role in preventing rotation and falling off, and is conducive to the installation of the rear cover 2.

[0054] In this embodiment, the exposed end of the orifice sleeve 1 is provided with a first snap ring 12 for cooperating with the annular lock buckle 6 for locking. The first snap ring 12 is used to cooperate with the annular lock buckle 6 to lock the cover 2 and the orifice sleeve 1, ensuring the rapid assembly and disassembly of the cover 2 and the orifice sleeve 1 while also achieving a barrier seal on the outside of the orifice.

[0055] In this embodiment, a second snap ring 22 is provided on the end of the cover 2 away from the through hole 21 for engaging with the annular locking buckle 6 for locking. The second snap ring 22 and the first snap ring 12 are tightly coupled to form a convex ring. The locking engagement of the annular locking buckle 6 with the convex ring ensures quick assembly and disassembly between the cover 2 and the orifice sleeve 1.

[0056] In this embodiment, a ring 23 is provided at the bottom of the second retaining ring 22 for tightly contacting the inner wall of the exposed end of the orifice sleeve 1. The ring 23 is inserted into the inner cavity of the exposed end of the orifice sleeve 1 and tightly contacts the inner wall of the exposed end, thereby realizing the rapid docking and positioning function of the cover 2 and the orifice sleeve 1.

[0057] In this embodiment, the annular lock buckle 6 comprises a rubber ring 61 and a retractable locking ring 62. The rubber ring 61 is wrapped around both the first and second retaining rings 12 and 22, while the locking ring 62 is clipped onto the rubber ring 61 and locked. This structure ensures a simple and ingenious design, with the rubber ring 61 wrapped around the convex ring formed by the second and first retaining rings 22 and 12 to achieve a seal. The locking ring 62 is then clipped onto the rubber ring 61 to provide a secure fit.

[0058] In this embodiment, the locking ring 62 comprises a pair of hinged half-rings 621. Each half-ring 621 is provided with a ring groove 622 for inserting the rubber ring 61. A locking plate 623 is provided at the end of each half-ring 621. A locking member 624 is hingedly connected to one locking plate 623, and a locking groove 625 is provided on the other locking plate 623 for the locking member 624 to engage and lock. In this structure, the hinged connection of the pair of half-rings 621 ensures the opening and closing functions of the locking ring 62. The locking function is achieved by the close contact between the two locking plates 623 and the locking member 624 engaging and locking in the locking groove 625.

[0059] In this embodiment, the locking member 624 includes a bolt 6241 and a nut 6242 disposed on the bolt 6241. The bolt 6241 is hingedly connected to the corresponding locking plate 623. The bolt 6241 is rotated into the locking slot 625 and is then locked by the nut 6242. In this structure, the bolt 6241 is rotated into the locking slot 625 and is then locked by the nut 6242, which is simple and reliable.

[0060] In this embodiment, a pressure ring 41 is provided on the outer surface of one end of the connecting ring 4 close to the sealing cover 2. The pressure ring 41 is pressed tightly against the end of the sealing cover 2 to ensure a sealing effect.

[0061] In this embodiment, one end of the connecting ring 4 close to the pressure ring 41 is provided with an internal thread for matching with the external thread of the pipe body 31 of the grouting pipe 3. The structure is simple and reliable.

[0062] In this embodiment, an end of the connecting ring 4 away from the pressure ring 41 is provided with an internal thread for connecting to the slurry stop valve joint 7. The structure is simple and reliable.

[0063] In this embodiment, the ring body of the connecting ring 4 is arranged as a polygonal ring body that is convenient for tightening or loosening the connecting ring 4. The polygonal ring body is convenient for tightening and loosening the connecting ring 4, thereby improving the convenience of disassembly and assembly.

[0064] In this embodiment, the slurry stop valve joint 7 is provided with an external thread for matching the internal thread of the connecting ring 4 at one end thereof close to the connecting ring 4, and an external thread for connecting the slurry stop valve at the other end thereof.

[0065] In the present embodiment, the middle position of the slurry stop valve joint 7 is provided with a hexagonal platform 71 for being convenient to tighten or loosen. Being convenient to tighten and loosen the slurry stop valve joint 7 by the hexagonal platform 71, the convenience of disassembly and assembly is improved.

[0066] The single-hole multi-tube synchronous grouting self-locking sealing method of the present invention is performed using the above-mentioned single-hole multi-tube synchronous grouting self-locking sealing device, and specifically comprises the following steps:

[0067] S1: Construct a concrete stop wall and bury the orifice sleeve 1 in the stop wall;

[0068] S2: Use a drilling tool to drill into the orifice casing 1 to form a grouting hole;

[0069] S3: Put the sealing ring 5 on the corresponding grouting pipe 3, and send each grouting pipe 3 from the orifice casing 1 into the same grouting hole and ensure that the slurry outlet end of each grouting pipe 3 is located at a cross-section position of different depths in the same grouting hole;

[0070] S4: Butt the cover 2 to the exposed end of the orifice casing 1 to ensure that each grouting pipe 3 passes through the corresponding through hole 21;

[0071] S5: Use the annular lock buckle 6 to lock the cover 2 and the orifice sleeve 1 and ensure that the sealing ring 5 forms a seal between the grouting pipe 3 and the corresponding through hole 21;

[0072] S6: Connect the grouting ends of the corresponding grouting pipes 3 of each connecting ring 4;

[0073] S7: Connect each slurry stop valve joint 7 to the corresponding connecting ring 4;

[0074] S8: inject cement slurry into the stop valve joint 7 until the grouting is completed;

[0075] S9: After the cement slurry has initially set, remove the slurry stop valve joint 7, the connecting ring 4, the annular lock buckle 6, the sealing cover 2 and the sealing ring 5;

[0076] S10: Clean the removed stop valve joint 7, connecting ring 4, annular lock buckle 6, cover 2 and sealing ring 5 and reserve them for use in the next grouting hole.

[0077] By adopting this method, multiple grouting pipes 3 are extended into the same grouting hole for synchronous grouting, and the slurry outlet ends of each grouting pipe 3 are located at cross-sectional positions of different depths in the same grouting hole, so that the grouting time of each cross-sectional position of the grouting hole is synchronized, which greatly improves the grouting efficiency and grouting quality, and the slurry stop valve joint 7, connecting ring 4, annular lock buckle 6, cover 2 and sealing ring 5 are all detachable and can be reused, which greatly reduces the cost; further, the connection of each component and the grouting self-locking sealing function are realized through the cooperation of the slurry stop valve joint 7, connecting ring 4, annular lock buckle 6, cover 2 and sealing ring 5, and its structure is simple and the design is ingenious.

[0078] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A single-hole multi-tube synchronous grouting self-locking sealing device, characterized by: The invention comprises an orifice sleeve (1), a cover (2), a plurality of grouting pipes (3) of different lengths, a connecting ring (4) matching the number of the grouting pipes (3), a sealing ring (5) matching the number of the grouting pipes (3), a slurry stop valve joint (7) matching the number of the grouting pipes (3), and an annular lock buckle (6), wherein the cover (2) is provided with through holes (21) matching the number of the grouting pipes (3) for each grouting pipe (3) to pass through, the orifice sleeve (1) is pre-buried in the slurry stop wall, and the The sealing cover (2) and the orifice sleeve (1) are detachably connected via an annular lock buckle (6); each connecting ring (4) is located at a corresponding through hole (21) and is detachably connected to the slurry inlet end of each corresponding grouting pipe (3); each grouting pipe (3) passes through the corresponding through hole (21) and extends into the same grouting hole; the slurry outlet end of each grouting pipe (3) is located at a cross-sectional position of different depths in the same grouting hole; the sealing ring (5) is sleeved on the corresponding grouting pipe (3) and aligns the grouting pipe (3) with the corresponding A seal is formed between the through holes (21), and each slurry stop valve joint (7) is detachably connected to the corresponding connecting ring (4). The grouting pipe (3) includes a pipe body (31), one end of the pipe body (31) is provided with an external thread for connecting to the connecting ring (4), and the other end is sealed. The pipe body (31) is provided with a plurality of overflow holes (311) in the circumferential direction near the sealing end. The sealing end of the pipe body (31) adopts a cone structure. The pipe body (31) is provided with an external thread for connecting to the connecting ring (4). A retaining ring (312) is formed at the position of the thread, and the retaining ring (312) cooperates with the end of the cover (2) to clamp the sealing ring (5), the embedded end of the orifice sleeve (1) is provided with a plurality of locking teeth (11) along the circumferential direction, the exposed end of the orifice sleeve (1) is provided with a first retaining ring (12) for cooperating with the annular lock buckle (6) for locking, and the end of the cover (2) away from the through hole (21) is provided with a second retaining ring (22) for cooperating with the annular lock buckle (6) for locking.

2. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 1 is characterized in that: The bottom of the second clamping ring (22) is provided with a ring (23) for tightly contacting the inner wall of the exposed end of the orifice sleeve (1).

3. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 2 is characterized in that: The annular lock buckle (6) comprises a rubber ring (61) and a closable lock ring (62), wherein the rubber ring (61) is wrapped around the outside of the first clamping ring (12) and the second clamping ring (22), and the lock ring (62) is clamped onto the outside of the rubber ring (61) and locked.

4. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 3 is characterized in that: The locking ring (62) comprises a pair of mutually hinged half rings (621), each half ring (621) is provided with a ring groove (622) for embedding the rubber ring (61), and each end of the half ring (621) is provided with a locking plate (623), one of the locking plates (623) is hinged with a locking member (624), and the other locking plate (623) is provided with a locking groove (625) for the locking member (624) to be inserted and locked.

5. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 4 is characterized in that: The locking member (624) includes a bolt (6241) and a nut (6242) disposed on the bolt (6241). The bolt (6241) is hinged to the corresponding locking plate (623). After the bolt (6241) is rotated into the locking slot (625), it is locked by the nut (6242).

6. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 5 is characterized in that: A pressure ring (41) is provided on the outer surface of one end of the connecting ring (4) close to the sealing cover (2).

7. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 6, characterized in that: One end of the connecting ring (4) close to the pressure ring (41) is provided with an internal thread for cooperating with the external thread of the pipe body (31) of the grouting pipe (3).

8. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 7, characterized in that: An end of the connecting ring (4) away from the pressure ring (41) is provided with an internal thread for connecting to a slurry stop valve joint (7).

9. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 8, characterized in that: The ring body of the connecting ring (4) is configured as a polygonal ring body that facilitates tightening or loosening of the connecting ring (4).

10. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 9, characterized in that: One end of the slurry stop valve joint (7) close to the connecting ring (4) is provided with an external thread for matching the internal thread of the connecting ring (4), and the other end is provided with an external thread for connecting to the slurry stop valve.

11. The single-hole multi-tube synchronous grouting self-locking sealing device according to claim 10, characterized in that: A hexagonal platform (71) is provided in the middle of the slurry stop valve joint (7) for facilitating tightening or loosening thereof.

12. A single-hole multi-tube synchronous grouting self-locking sealing method, characterized in that: The method is carried out using the single-hole multi-tube synchronous grouting self-locking sealing device according to any one of claims 1 to 11, specifically comprising the following steps: S1: Construct a concrete stop wall and bury the orifice casing (1) in the stop wall; S2: using a drilling tool to drill into the hole casing (1) to form a grouting hole; S3: Put the sealing ring (5) on the corresponding grouting pipe (3), send each grouting pipe (3) from the hole casing (1) into the same grouting hole and ensure that the slurry outlet end of each grouting pipe (3) is located at a cross-section position of different depths in the same grouting hole; S4: docking the cover (2) with the exposed end of the orifice casing (1), ensuring that each grouting pipe (3) passes through the corresponding through hole (21); S5: Using the annular lock buckle (6), the cover (2) and the orifice sleeve (1) are locked and the sealing ring (5) is ensured to form a seal between the grouting pipe (3) and the corresponding through hole (21); S6: Connect the grouting ends of the corresponding grouting pipes (3) of each connecting ring (4); S7: Connect each slurry stop valve joint (7) to the corresponding connecting ring (4); S8: inject cement slurry into the stop valve joint (7) until the grouting is completed; S9: After the cement slurry has initially set, remove the slurry stop valve joint (7), the connecting ring (4), the annular lock buckle (6), the sealing cover (2) and the sealing ring (5); S10: Clean the disassembled stop valve joint (7), connecting ring (4), annular lock buckle (6), cover (2) and sealing ring (5) and reserve them for use in the next grouting hole.

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