Shunting control assembly for concrete pouring
By setting a square diversion port on the upper part of the tunnel lining vault grouting pipe, installing a cyclonic drive mechanism at the lower part and installing monitoring equipment at the top, the blockage and uneven ejection problems caused by excessive pressure on the grouting pipe outlet are solved, and rotating uniform pouring and real-time monitoring and adjustment are achieved, which significantly shortens the construction cycle and improves the construction quality.
Patent Information
- Application Number
- CN202422072274.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-26
AI Technical Summary
When pouring concrete with the tunnel lining vault grouting pipe, the slurry water and the gravel flow separately due to excessive outlet pressure, causing the pipeline to be blocked and unevenly ejected, and lacks internal monitoring functions, making it impossible to flexibly adjust the pouring flow and angle, resulting in a long construction period.
A concrete pouring shunt control assembly is designed, including grouting pipe mounting box and pouring monitoring casing assembly. This component is equipped with a square diversion port on the upper part of the grouting pipe to reduce outlet pressure; a cyclic drive mechanism is installed at the lower part of the grouting pipe to achieve rotary uniform pouring; and monitoring equipment is installed at the top to monitor and adjust the pouring situation in real time.
By reducing the grouting outlet pressure, pipeline blockage and uneven spraying are avoided, and the construction cycle is shortened; rotary casting achieves uniform spraying, improving construction efficiency; monitoring equipment enables timely adjustment of pouring parameters, shortening construction cycle and improving construction quality.
Smart Images
Figure CN222910041U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tunnel lining arch top grouting, and particularly relates to a concrete pouring flow splitting control component. Background Art
[0002] At present, when pouring lining concrete, the grouting pipe at the tunnel lining arch top can only spray concrete through the top port. Therefore, a relatively large grouting system pressure is required to send the concrete to the tunnel lining arch top. However, if the outlet pressure of the grouting pipe is too high, it is easy to cause the separation and flow of the slurry water and stones in the concrete in the grouting pipe. The slurry water flows faster and thus sprays out faster, while the stones flow slower and stay and accumulate in the grouting pipe, resulting in pipeline blockage. Moreover, the spraying angle of the current grouting pipe is not controlled. When the outlet pressure is too high, the concrete tilts and sprays out randomly to one side under the action of gravity, resulting in uneven pouring of the tunnel lining arch top concrete, unable to quickly fill the inside of the tunnel lining, and a long construction period.
[0003] At present, the grouting pipe at the tunnel lining arch top also lacks an internal monitoring function, resulting in complete ignorance of the pouring situation inside the tunnel lining arch top. It can only judge that it is full by the overflow of concrete and then stop pouring, resulting in the inability to flexibly adjust the pouring flow rate and pouring angle in a timely manner according to the internal pouring situation. Summary of the Invention
[0004] The utility model aims to provide a concrete pouring flow splitting control component, which reduces the grouting outlet pressure, shortens the construction period, and sprays the slurry evenly, and solves the problems that the current grouting system has too high pressure resulting in pipeline blockage, the uneven grouting of the grouting pipe resulting in a long construction period, and the lack of an internal monitoring function resulting in the inability to flexibly adjust the pouring flow rate and pouring angle.
[0005] For this purpose, the technical solution adopted by the utility model is as follows: a concrete pouring flow splitting control component, including a grouting pipe installation box body and a pouring monitoring sleeve component installed on the grouting pipe installation box body. The pouring monitoring sleeve component includes a grouting pipe rotatably installed at the bottom in the grouting pipe installation box body, a liftable sleeve sleeved on the grouting pipe, and a monitoring device located at the top end of the grouting pipe. A rotary drive mechanism for realizing rotation is installed at the bottom of the grouting pipe. The upper part of the grouting pipe extends into the tunnel lining arch top and is horizontally provided with a square flow splitting port in the front-back direction near the top end. A pipe top plug is horizontally installed at the top port of the grouting pipe. A conical flow splitting column is centrally arranged on the bottom surface of the pipe top plug facing downwards, so as to evenly split the concrete sprayed up by the grouting pipe along the square flow splitting port. The bottom of the liftable sleeve is equipped with a lift drive mechanism. A bushing closely attached to the outer wall of the grouting pipe is installed at the top end of the liftable sleeve, and a limiting copper sleeve attached to the outer wall of the grouting pipe is installed on the inner wall of the bottom. When the lift drive mechanism drives the liftable sleeve to move along the grouting pipe, the liftable sleeve can rise to be flush with the top surface of the monitoring device or drop to expose the square flow splitting port.
[0006] As a preferred embodiment of the above scheme, the upper inner wall of the liftable sleeve corresponds to the "O"-shaped sealing ring installed with the outer wall of the grouting pipe at intervals above and below the bushing, and the lower inner wall of the liftable sleeve is tightly attached with an elastic retaining ring installed just below the limiting copper sleeve for tightening the outer wall of the grouting pipe, thereby ensuring the airtightness of the liftable sleeve and the grouting pipe and preventing concrete from flowing between the liftable sleeve and the grouting pipe.
[0007] It is further preferred that the lifting drive mechanism includes a lifting drive motor, a driving sprocket horizontally located at the output end of the lifting drive motor, a vertical trapezoidal screw rotatably mounted in the grouting pipe mounting box through a bearing seat, and a driven sprocket fixedly mounted on the vertical trapezoidal screw. The driving sprocket and the driven sprocket are connected by a horizontal chain, and the bottom outer wall of the liftable sleeve is integrally provided with a horizontal connecting plate connected to the screw nut of the vertical trapezoidal screw. When the lifting drive motor is started, the driving sprocket drives the driven sprocket and the vertical trapezoidal screw to rotate synchronously, and drives the liftable sleeve to move along the grouting pipe through the horizontal connecting plate. The structure is interlocking and automatically lifts and lowers, and the design is reasonable.
[0008] Further preferably, the grouting pipe installation box includes a top cover plate, a right cover plate, a mounting base and side plates symmetrically arranged front and back, and the top cover plate and the mounting base are both provided with grouting pipe through holes for the upper and lower ends of the grouting pipe to vertically pass through, and the structural design is reasonable.
[0009] Further preferably, the mounting base is provided with a through hole corresponding to the output end of the lifting drive motor, and is equipped with a manual rocker spare tool that can pass through the through hole to manually rotate the output end of the lifting drive motor; the output end of the lifting drive motor is provided with a motor support seat installed on the mounting base; when the lifting drive motor cannot be used, it can be manually controlled by the manual rocker spare tool, and the design is reasonable.
[0010] Further preferably, two "O"-shaped sealing rings are used to ensure the sealing effect, the bushing is made of PA6 nylon, which is wear-resistant, has a small friction coefficient, is self-lubricating and has noise-absorbing properties, and the "O"-shaped sealing ring is made of rubber, and the material selection is reasonable.
[0011] It is further preferred that a mounting flange is provided at the lower portion of the grouting pipe, and a pipe joint is provided at the bottom end of the grouting pipe that can be connected to a 45° bent pipe, so as to be flexibly connected to a concrete delivery pipeline, and the rotary drive mechanism includes a rotary support seat whose outer ring is threadedly connected to the mounting flange and a gear reducer that provides a rotational driving force for the rotary support seat, and a driving threaded mounting hole is provided around the grouting pipe through-hole of the mounting base that is threadedly connected to the inner ring of the rotary support seat. When the gear reducer is started, the grouting pipe is driven to rotate through the rotary support seat, and the design structure is reasonable.
[0012] Further preferably, cable placement grooves are vertically provided on the outer wall of the grouting pipe symmetrically from left to right for placing cables from monitoring devices, which can ensure the overall aesthetics, neatly store the wire harness, and reduce the safety hazard of wire entanglement. The bottom of the cable placement groove is connected to a cable pipe that bends vertically downward and passes through the installation flange to lead the cable out of the grouting pipe installation box. The design is reasonable and can avoid wire accumulation.
[0013] Further preferably, the right cover plate is provided with an opening for the gear-type reducer to be exposed. The side plate is provided with a through hole corresponding to the output shaft of the gear-type reducer and is equipped with a manual rocker spare tool that can pass through the through hole to manually rotate the output rotating shaft of the gear-type reducer. When the gear-type reducer cannot be used, it can be manually controlled through the manual rocker spare tool. An observation window is provided in the upper middle part of the side plate, and the design is reasonable.
[0014] Further preferably, the monitoring device includes a glass cover, an upper cover plate located on the top surface of the glass cover, a camera holder centrally installed on the top plug of the pipe, a camera installed on the camera holder, and a supplementary light installed at the bottom of the upper cover plate. The glass cover fits the outer contour of the grouting pipe, and together with the upper cover plate and the top plug of the pipe, a closed cylindrical cavity is formed. The upper cover plate is bolted to the top plug of the pipe, with a stable structure installation and convenient for real-time monitoring.
[0015] The beneficial effects of the present utility model are as follows:
[0016] (1) Compared with the situation where the pipeline is blocked due to excessive pressure in the grouting system, in this solution, a square shunt opening is horizontally penetrated in the front and back directions near the top of the grouting pipe, which can increase the concrete outlet area, guide the concrete pouring direction, effectively reduce the required outlet pressure, and the upper part of the grouting pipe extends into the arch crown of the tunnel lining, which can also reduce the required outlet pressure. It can uniformly reduce the system pressure of grouting by 5 MPa, effectively avoiding the separation and flow of slurry and stones due to high system grouting pressure. The slurry flow rate is faster and thus it sprays out faster, while the stone flow rate is slower and stays and accumulates in the grouting pipe, resulting in pipeline blockage. The concept is ingenious and the design is novel.
[0017] (2) Compared with the uneven grouting of the grouting pipe at the arch crown of the current tunnel lining, in this solution, a rotary driving member is added at the lower part of the grouting pipe to provide a rotary driving force to drive the grouting pipe to rotate, so as to achieve rotary uniform pouring, effectively solving the problem of long pouring time cycle caused by only pouring one side and then flowing to fill other spaces. It can automatically control the rotation, with a reasonable design structure, reducing the time cost and shortening the construction period.
[0018] (3) Compared with the grouting pipes on the current market that lack monitoring devices installed, this solution installs a monitoring device at the top of the grouting pipe, so that the pouring flow rate and pouring angle can be adjusted flexibly in real time according to the internal pouring situation, thus achieving rapid pouring and effectively shortening the construction period. This solution also uses a liftable sleeve to repeatedly lift and scrape off the concrete attached to the outer wall of the monitoring device for the timely cleaning of the monitoring device at the top of the grouting pipe, and also plays a role in protecting the monitoring device during the subsequent extraction process of the grouting pipe, thereby ensuring the clarity of the monitoring device's camera and increasing the service life of the monitoring device. The concept is ingenious and the design is novel. The lifting drive mechanism automatically lifts, saving time and effort.
[0019] (4) A bushing that fits tightly against the outer wall of the grouting pipe is installed at the top of the liftable sleeve, and a limiting copper sleeve that fits against the outer wall of the grouting pipe is installed on the inner wall at the bottom of the liftable sleeve, fully ensuring the sealing performance between the upper and lower parts of the liftable sleeve and the outer wall of the grouting pipe, effectively preventing concrete from entering between the liftable sleeve and the outer wall of the grouting pipe, resulting in blockage of relative movement. Moreover, since torque will be generated when the liftable sleeve lifts and drops, causing it to skew and unable to move vertically upward, setting a limiting copper sleeve at the bottom of the grouting pipe can fully ensure that the liftable sleeve moves vertically upward along the grouting pipe, reducing the influence of torque force. The design is reasonable.
[0020] In summary, it has the advantages of reducing the grouting outlet pressure, preventing pipeline blockage, rotary uniform grouting, shortening the construction period, and reducing the influence of lifting torque force. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic structural diagram of the present invention.
[0022] Figure 2 It is a schematic internal installation structure diagram of the lifting drive mechanism and the liftable sleeve.
[0023] Figure 3 It is a cross-sectional view of the liftable sleeve tightly sleeved on the grouting pipe.
[0024] Figure 4 It is for Figure 3 The partial enlarged view at A of
[0025] Figure 5 It is a partial display diagram of the liftable sleeve tightly sleeved on the grouting pipe.
[0026] Figure 6 It is a schematic installation structure diagram of the rotary drive mechanism and the grouting pipe.
[0027] Figure 7 It is a schematic structural diagram of the grouting pipe.
[0028] Figure 8 It is a cross-sectional view of the monitoring device. DETAILED DESCRIPTION
[0029] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:
[0030] Combination Figure 1 — Figure 8 As shown, a concrete pouring diversion control component is composed of a grouting pipe installation box 3 and a pouring monitoring sleeve component 4 installed on the grouting pipe installation box 3.
[0031] The grouting pipe installation box 3 is composed of a top cover plate 31, a right cover plate 32, a mounting base 33 and side plates 34 symmetrically arranged front and back.
[0032] The pouring monitoring sleeve assembly 4 consists of a grouting pipe 41 whose bottom is rotatably installed in the grouting pipe installation box 3, a liftable sleeve 42 sleeved on the grouting pipe 41, and a monitoring device 43 located at the top of the grouting pipe 41.
[0033] The top cover plate 31 and the mounting base 33 are both provided with grouting pipe holes for the upper and lower ends of the grouting pipe 41 to vertically pass through.
[0034] A mounting flange 414 is provided at the lower portion of the grouting pipe 41 .
[0035] The bottom end of the grouting pipe 41 is provided with a pipe joint 415 that can be butt-jointed with a 45° bent pipe.
[0036] A rotary drive mechanism 44 for realizing rotation is installed at the bottom of the grouting pipe 41 .
[0037] The upper portion of the grouting pipe 41 extends into the tunnel lining vault and is horizontally penetrated by a square branch flow opening 411 near the top.
[0038] A pipe top plugging cover 412 is horizontally installed at the top end of the grouting pipe 41 .
[0039] A conical diversion column 413 is disposed in the center of the bottom surface of the pipe top plugging cover 412 facing downward, so that the concrete sprayed from the grouting pipe 41 can be evenly diverted out along the square diversion opening 411.
[0040] The grouting pipe 41 is provided with cable placement grooves 416 symmetrically vertically along the outer wall of the pipe body, for accommodating cables from the monitoring equipment 43 .
[0041] The bottom of the cable placement groove 416 is connected with a cable tube 417 that is bent and vertically passes through the mounting flange 414 downward, so as to lead the cable out of the grouting pipe installation box 3. The bottom of the liftable sleeve 42 is equipped with a lifting drive mechanism 45.
[0042] A bushing 421 that fits tightly against the outer wall of the grouting pipe 41 is installed on the top of the liftable sleeve 42 , and a limiting copper sleeve 422 that fits against the outer wall of the grouting pipe 41 is installed on the inner wall of the bottom.
[0043] On the inner wall of the upper part of the liftable sleeve 42, "O" - shaped sealing rings 423 that tightly hold the outer wall of the grouting pipe 41 are installed at upper and lower intervals corresponding to the position below the bushing 421. On the inner wall of the lower part of the liftable sleeve 42, a snap ring that tightly holds the outer wall of the grouting pipe 41 is installed closely below the limiting copper sleeve 422.
[0044] Preferably, two "O" - shaped sealing rings 423 are used.
[0045] The bushing 421 is preferably made of PA6 nylon material.
[0046] The "O" - shaped sealing ring 423 is preferably made of rubber material.
[0047] The monitoring device 43 is composed of a glass cover 431, an upper cover plate 432 located on the top surface of the glass cover 431, a camera holder 433 centrally installed on the pipe top plug 412, a camera 434 installed on the camera holder 433, and a supplementary light 435 installed at the bottom of the upper cover plate 432.
[0048] The glass cover 431 fits the outer contour of the grouting pipe 41, and together with the upper cover plate 432 and the pipe top plug 412, it forms a closed cylindrical cavity.
[0049] The upper cover plate 432 is bolt - connected to the pipe top plug 412.
[0050] The slewing drive mechanism 44 is composed of a slewing support seat 441 whose outer ring is thread - connected to the mounting flange 414 and a gear - type speed reducer 442 that provides rotational driving force for the slewing support seat 441.
[0051] Around the grouting pipe through - hole of the installation base 33, driving thread mounting holes that are thread - connected to the inner ring of the slewing support seat 441 are provided in the circumferential direction.
[0052] When the gear - type speed reducer 442 is started, it drives the grouting pipe 41 to rotate through the slewing support seat 441.
[0053] The right cover plate 32 is provided with an opening for the gear - type speed reducer 442 to be exposed.
[0054] The side plate 34 is provided with a through - hole corresponding to the output shaft of the gear - type speed reducer 442, and is equipped with a manual rocker spare tool that can pass through the through - hole to manually rotate the output rotating shaft of the gear - type speed reducer 442.
[0055] In the upper - middle part of the side plate 34, an observation window 341 is provided.
[0056] The lifting drive mechanism 45 is composed of a lifting drive motor 453, a driving sprocket 454 horizontally located at the output end of the lifting drive motor 453, a vertical trapezoidal lead screw 451 rotatably installed in the grouting pipe installation box 3 through a bearing seat, and a driven sprocket 452 fixedly installed on the vertical trapezoidal lead screw 451.
[0057] The driving sprocket 454 and the driven sprocket 452 are connected by a horizontal chain 455.
[0058] On the outer wall of the bottom of the liftable sleeve 42, a horizontal connecting plate 424 integrally provided is connected to the screw nut of the vertical trapezoidal screw rod 451.
[0059] When the lift driving motor 453 is started, the driving sprocket 454 drives the driven sprocket 452 and the vertical trapezoidal screw rod 451 to rotate synchronously, and drives the liftable sleeve 42 to move along the grouting pipe 41 through the horizontal connecting plate 424.
[0060] The installation base 33 is provided with a through hole corresponding to the output end of the lift driving motor 453, and is equipped with a manual rocker spare tool that can pass through the through hole to manually rotate the output end of the lift driving motor 453.
[0061] The output end of the lift driving motor 453 is provided with a motor support seat 331 installed on the installation base 33. When the lift driving mechanism 45 drives the liftable sleeve 42 to move along the grouting pipe 41, the liftable sleeve 42 can be raised to be flush with the top surface of the monitoring device 43 or lowered to expose the square shunt opening 411.
[0062] First, connect the 45° bent pipe through the pipe joint 415 and dock it with the grouting pipeline on the lining trolley, and then vertically extend the upper part of the grouting pipe 41 into the arch top of the tunnel lining.
[0063] After the grouting pipe 41 is hermetically fixed on the arch top formwork of the tunnel lining, start the gear type reducer 442 and start transporting concrete for grouting at the same time.
[0064] Turn on the supplementary light 435, and observe the pouring situation in real time through the camera 434, and then rotate the grouting pipe 41 through the swing driving mechanism 44, so as to perform 360° dead angle-free monitoring and pouring.
[0065] After the pouring is completed, start the lift driving mechanism 45, and then the liftable sleeve 42 moves along the grouting pipe 41 to rise to be flush with the top surface of the monitoring device 43, so as to seal the opening and scrape off the concrete attached to the monitoring device 43.
Claims
1. A concrete pouring flow control assembly, characterized in that: The invention comprises a grouting pipe installation box (3) and a pouring monitoring sleeve assembly (4) installed on the grouting pipe installation box (3), wherein the pouring monitoring sleeve assembly (4) comprises a grouting pipe (41) whose bottom is rotatably installed in the grouting pipe installation box (3), a liftable sleeve (42) sleeved on the grouting pipe (41), and a monitoring device (43) located at the top of the grouting pipe (41), wherein a rotary drive mechanism (44) for realizing rotation is installed at the bottom of the grouting pipe (41), wherein the upper part of the grouting pipe (41) extends into the tunnel lining vault and is horizontally penetrated by a square branch flow opening (411) in the front and rear directions near the top, wherein a pipe top plugging cover (412) is horizontally installed at the top end of the grouting pipe (41), and the pipe top plugging cover (412) is installed horizontally. A conical flow-dividing column (413) is provided in the center of the bottom surface of the plugging cover (412), so that concrete sprayed from the grouting pipe (41) can be evenly diverted out along the square flow-dividing opening (411). The bottom of the liftable sleeve (42) is provided with a lifting drive mechanism (45). The top of the liftable sleeve (42) is provided with a bushing (421) that is tightly fitted with the outer wall of the grouting pipe (41), and the bottom inner wall is provided with a limiting copper sleeve (422) that is fitted with the outer wall of the grouting pipe (41). When the lifting drive mechanism (45) drives the liftable sleeve (42) to move along the grouting pipe (41), the liftable sleeve (42) can be lifted to be flush with the top surface of the monitoring device (43) or lowered to expose the square flow-dividing opening (411).
2. A concrete pouring flow control assembly according to claim 1, characterized in that: The upper inner wall of the liftable sleeve (42) corresponds to an O-shaped sealing ring (423) installed at intervals above and below the bushing (421) to tighten the outer wall of the grouting pipe (41), and the lower inner wall of the liftable sleeve (42) is tightly attached to an elastic retaining ring installed just below the limiting copper sleeve (422) to tighten the outer wall of the grouting pipe (41).
3. A concrete pouring flow control assembly according to claim 1, characterized in that: The lifting drive mechanism (45) comprises a lifting drive motor (453), a driving sprocket (454) horizontally located at the output end of the lifting drive motor (453), a vertical trapezoidal lead screw (451) rotatably mounted in the grouting pipe mounting box (3) via a bearing seat, and a driven sprocket (452) fixedly mounted on the vertical trapezoidal lead screw (451); the driving sprocket (454) and the driven sprocket (452) are connected via a horizontal chain (455); a horizontal connecting plate (424) connected to a lead screw nut of the vertical trapezoidal lead screw (451) is integrally provided on the bottom outer wall of the liftable sleeve (42); when the lifting drive motor (453) is started, the driving sprocket (454) drives the driven sprocket (452) and the vertical trapezoidal lead screw (451) to rotate synchronously, and drives the liftable sleeve (42) to move along the grouting pipe (41) via the horizontal connecting plate (424).
4. A concrete pouring flow control assembly according to claim 3, characterized in that: The grouting pipe installation box (3) comprises a top cover plate (31), a right cover plate (32), a mounting base (33), and side plates (34) symmetrically arranged front and rear, and the top cover plate (31) and the mounting base (33) are both provided with grouting pipe through holes for the upper and lower ends of the grouting pipe (41) to vertically pass through.
5. A concrete pouring flow control assembly according to claim 4, characterized in that: The mounting base (33) is provided with a through hole corresponding to the output end of the lifting drive motor (453), and is equipped with a manual rocker spare tool capable of passing through the through hole to manually rotate the output end of the lifting drive motor (453). The output end of the lifting drive motor (453) is provided with a motor support seat (331) mounted on the mounting base (33).
6. A concrete pouring flow control assembly according to claim 2, characterized in that: Two "O"-shaped sealing rings (423) are used, the bushing (421) is made of PA6 nylon material, and the "O"-shaped sealing ring (423) is made of rubber material.
7. A concrete pouring flow control assembly according to claim 4, characterized in that: The lower part of the grouting pipe (41) is provided with a mounting flange (414), and the bottom end of the grouting pipe (41) is provided with a pipe joint (415) capable of docking with a 45° bent pipe. The rotary drive mechanism (44) comprises a rotary support seat (441) whose outer ring is threadedly connected to the mounting flange (414) and a gear reducer (442) providing a rotational driving force for the rotary support seat (441). The grouting pipe through hole of the mounting base (33) is provided with a driving threaded mounting hole threadedly connected to the inner ring of the rotary support seat (441). When the gear reducer (442) is started, the grouting pipe (41) is driven to rotate through the rotary support seat (441).
8. A concrete pouring flow control assembly according to claim 7, characterized in that: The grouting pipe (41) is provided with a cable placement groove (416) symmetrically along the outer wall of the pipe body, and is used to place cables from the monitoring equipment (43). The bottom of the cable placement groove (416) is connected to a cable pipe (417) that is bent vertically downward and passes through the mounting flange (414), so as to lead the cable out of the grouting pipe installation box (3).
9. A concrete pouring flow control assembly according to claim 7, characterized in that: The right cover plate (32) is provided with an opening for exposing the gear reducer (442), the side plate (34) is provided with a through hole corresponding to the output shaft of the gear reducer (442), and is equipped with a manual rocker spare tool capable of passing through the through hole to manually rotate the output shaft of the gear reducer (442), and an observation window (341) is provided in the upper middle portion of the side plate (34).
10. A concrete pouring flow control assembly according to claim 1, characterized in that: The monitoring device (43) comprises a glass cover (431), an upper cover plate (432) located on the top surface of the glass cover (431), a camera pressure seat (433) centrally mounted on the pipe top plugging cover (412), a camera (434) mounted on the camera pressure seat (433), and a fill light (435) mounted on the bottom of the upper cover plate (432); the glass cover (431) matches the outer contour of the grouting pipe (41), and is combined with the upper cover plate (432) and the pipe top plugging cover (412) to form a closed cylindrical cavity; the upper cover plate (432) is bolted to the pipe top plugging cover (412).