Subway tunnel cavity position detection and treatment device

Abstract

The invention discloses a subway tunnel cavity position detection and treatment device which comprises a protective plate, grouting pipes arranged on the periphery of the protective plate, a suction pipe arranged in the middle of the protective plate, an embedded pipe in sliding connection with the end of the suction pipe, an insertion hole formed in the embedded pipe, a piston in sliding connection with one end of the grouting pipe and the insertion hole of the embedded pipe, and a supporting rod fixedly connected with one end of the piston. The end of the supporting rod is fixedly connected with a blocking plate which is fixedly connected to one end of the suction pipe and provided with a suction hole. A plurality of sinking grooves are formed in the end of the suction pipe in an array mode, hollow stirring rods are hinged into the sinking grooves, the supporting rods and the pistons are of hollow structures and communicate with inner cavities of the stirring rods through pipelines on the inner walls of the blocking plates, and slurry outlet holes are formed in the outer arc faces of the stirring rods. The grouting device has the advantages that local soft and rotten soil is stirred by the stirring rods and pumped out to form the cavity, the cavity is filled with grout injected from the grouting pipe through the embedding pipe, and the cavity is filled while exhausting is conducted from inside to outside, so that filling is more compact.

Description

Technical Field

[0001] This invention relates to the field of tunnel cavity management technology, and in particular to a device for detecting and managing the location of cavities in subway tunnels. Background Technology

[0002] With the increase in the number of operational tunnels, some tunnels have developed varying degrees of defects due to the influence of geological conditions, geological structure, groundwater conditions, and construction factors at the time, such as tunnel lining voids and structural water leakage, which seriously affect the safety of railway operations.

[0003] When soft mud or water accumulates inside a tunnel cavity, the traditional method is to drill into the cavity, install a casing, and inject grout. However, the injected grout is diluted and cannot meet the designed curing requirements. Local air cavities are prone to appear inside the cavity, making it difficult for the grout to fill the cavity densely. The grout cannot diffuse well in the damaged section, resulting in poor reinforcement effect. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for detecting and managing the location of voids in subway tunnels, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A device for detecting and treating cavities in a subway tunnel includes a protective plate, grouting pipes arranged around the protective plate, and a suction pipe arranged in the middle of the protective plate. The end of the suction pipe is slidably connected to an embedded pipe, and the embedded pipe is provided with an insertion hole. One end of the grouting pipe is inserted into the insertion hole of the embedded pipe. A piston is slidably connected inside the embedded pipe. One end of the piston is fixedly connected to a support rod, and the end of the support rod is fixedly connected to a blocking plate. The blocking plate is fixedly connected to one end of the suction pipe and is provided with a suction hole. The suction pipe end array is provided with several settling tanks, and hollow stirring rods are hinged to the settling tanks. The support rods and pistons are hollow structures and are connected to the inner cavity of the stirring rods through the pipes on the inner wall of the plug plate. The outer arc surface of the stirring rods is provided with slurry outlet holes.

[0006] Preferably, a pull plate is provided at the end of the suction tube, and a drive motor is fixedly connected to one side of the pull plate. The drive motor drives the suction tube to rotate through a gear set.

[0007] Preferably, the settling tank is spiral-shaped, and the agitator is adapted to the settling tank.

[0008] Preferably, the stirring rod includes short rods that are hinged together in sequence, a torsion spring is provided on the hinge shaft of the short rods, and a metal hose with an interconnected inner cavity is provided on the inner arc surface of the short rods and is connected to the grouting pipeline.

[0009] Preferably, the suction tube has a sliding hole inside, and a steel wire is slidably connected inside the sliding hole. One end of the steel wire is provided with a stopper, which is limited to one end face of the suction tube. The other end of the steel wire is fixedly connected to one side of a short rod.

[0010] Preferably, the grouting pipe is in the shape of an arc.

[0011] This invention provides a device for detecting and managing void locations in subway tunnels. It offers the following advantages: (1) The inner wall of the tunnel is first supported by the protective plate in conjunction with the conventional reinforcement structure. A clearance hole is set in the middle of the protective plate. A hole is drilled from the clearance hole to the center of the cavity. The drilling depth exceeds the cavity. A suction pipe and a buried pipe are inserted into the hole. One end of the grouting pipe is connected to the insertion hole of the buried pipe to form a grouting reinforcement barrier around the cavity. The grouting pipe, suction pipe, buried pipe and protective plate form an integral reinforcement. It is suitable for cavities formed by seepage from inside the tunnel to form corrosion, improves the reinforcement strength and facilitates the isolation of seepage path.

[0012] (2) Soft soil or water inside the cavity is vacuumed to the outside through the suction pipe. Locally soft soil is stirred by the stirring rod and extracted to form a cavity. The cavity is flushed by grout injected through the grouting pipe and filled with paste-like material. The filling is carried out from the inside out while air is being vented, thus making the filling more compact. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the basic structure of the present invention; Figure 2 This is a schematic diagram of the state of the stirring rod after it has been extended according to the present invention; Figure 3 yes Figure 2 A magnified view of point E in the image; Figure 4 This is a schematic diagram of the suction tube being pulled outward relative to the embedded tube in this invention. Figure 5 This is a cross-sectional view of the suction tube and the implantation tube of the present invention; Figure 6 This is a schematic diagram of the connection structure between the suction tube and the steel wire of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Example 1

[0015] Please see Figures 1 to 6This invention provides a technical solution: a device for detecting and treating cavities in subway tunnels, comprising a protective plate 1, grouting pipes 2 arranged around the protective plate 1, the grouting pipes 2 being arc-shaped pipes, firstly using ground-penetrating radar to detect the range of cavities 10, then using directional drilling to drill arc-shaped pipe holes, avoiding cavities 10 and forming a grouting reinforcement area around them, bending the grouting pipes 2 to the corresponding arc, the grouting pipes 2 being inserted into the arc-shaped pipe holes, a suction pipe 3 being arranged in the middle of the protective plate 1, the end of the suction pipe 3 being slidably connected to an embedded pipe 4, the embedded pipe 4 being provided with an insertion hole, one end of the grouting pipe 2 being inserted into the insertion hole of the embedded pipe 4, a piston 5 being slidably connected inside the embedded pipe 4, one end of the piston 5 being fixedly connected to a support rod 6, the end of the support rod 6 being fixedly connected to a blocking plate 7, the blocking plate 7 being fixedly connected to one end of the suction pipe 3, the blocking plate 7 being provided with a suction hole 71, the suction hole 71 being used to suction out silt or accumulated water; Several settling troughs 31 are arranged at the end of the suction pipe 3. A hollow stirring rod 32 is hinged to the settling trough 31. The support rod 6 and piston 5 are hollow and are connected to the inner cavity of the stirring rod 32 through the pipe 711 on the inner wall of the blocking plate 7. The outer arc surface of the stirring rod 32 is provided with a slurry outlet hole 322. A sliding hole is provided inside the suction pipe 3. A steel wire 9 is slidably connected in the sliding hole. One end of the steel wire 9 is provided with a pier, which is limited at one end face of the suction pipe 3. The other end of the steel wire 9 is fixedly connected to one side of the short rod 321. The stirring rod 32 is first limited and tightened by the steel wire 9 and sinks into the settling trough 31 so that the suction pipe 3 is easy to insert. After being inserted into place, the pier is clamped off with pliers. The steel wire 9 loses its limiting tension, and the torsion spring causes the stirring rod 32 to unfold in the cavity 10.

[0016] This invention uses a protective plate 1 in conjunction with a conventional reinforcement structure to first support the inner wall of the tunnel. An avoidance hole is set in the middle of the protective plate 1. A hole is drilled from the avoidance hole toward the center of the cavity 10, with the drilling depth exceeding the cavity 10. A suction pipe 3 and an embedded pipe 4 are inserted into the hole. One end of the grouting pipe 2 is connected to the insertion hole of the embedded pipe 4, forming a grouting reinforcement barrier around the cavity 10. The grouting pipe 2, suction pipe 3, embedded pipe 4 and protective plate 1 form an integral reinforcement. This invention is suitable for cavities 10 corroded by seepage from inside the tunnel, improving the reinforcement strength and facilitating the isolation of seepage paths.

[0017] The soft soil or water inside the cavity 10 is vacuum-suctioned to the outside through the suction pipe 3. This facilitates the detection of the soft mud properties or water volume using existing testing instruments. On the other hand, as the inner end of the suction pipe 3 is gradually pulled outward, the locally soft and rotten soil is stirred and extracted by the stirring rod 32 to form a cavity. This cavity is flushed by the grout injected through the grouting pipe 2 and the embedded pipe 4, and filled with a paste-like material. The filling is carried out from the inside out while air is being vented, making the filling more compact. The paste-like material is prepared using existing technology, such as cement paste.

[0018] Furthermore, a pull plate 8 is provided at the end of the suction pipe 3. A drive motor 81 is fixedly connected to one side of the pull plate 8. The drive motor 81 drives the suction pipe 3 to rotate through a gear set. By setting a guide rail of the prior art, the pull plate 8 slides towards the middle of the tunnel on the guide rail while driving the suction pipe 3 to rotate. The bottom of the suction pipe 3 first touches the cavity 10. The stirring rod 32 stirs the cleaning hole and pulls it outward. The cleaning position is gradually filled by the subsequent grout. Grouting is injected from the inside out to fill the cavity, thereby avoiding the formation of air cavities in the cavity 10 that affect the filling density.

[0019] Finally, the stirring rod 32 is located on the side of the cavity 10 near the tunnel wall. The suction pipe 3 is welded to the protective plate 1 and the exposed part is cut off to complete the treatment work. Example 2

[0020] Please see Figures 1 to 6 The settling tank 31 is spiral-shaped, and the agitator 32 is adapted to the settling tank 31, such as... Figure 2 and Figure 3 When the suction tube 3 rotates, the spiral structure of the stirring rod 32 allows it to move sideways to avoid hitting a hard object 20, thus preventing it from getting stuck and making it easier to clean soft sludge or stagnant water.

[0021] The stirring rod 32 includes short rods 321 connected in sequence by hinges. A torsion spring is provided on the hinge shaft of the short rods 321. A metal hose 323 that communicates with the inner cavity is provided on the inner arc surface of the short rods 321 and is connected to the grouting pipe 2. The stirring rod 32 is segmented, which makes it easier to stir up soft mud and accumulated water and avoid irregular voids 10 structure.

[0022] In Example 2, the spiral structure of the stirring rod 32 allows it to move laterally to avoid contact with a hard body 20 on the outside, thus preventing it from getting stuck and facilitating the cleaning of soft sludge or accumulated water. At the same time, the grouting pipe 2 presses in grout, which is then flushed into the cavity 10 by the piston 5, support rod 6, the inner wall pipe 711 of the plug plate 7 and the inner cavity of the stirring rod 32 (two grouting pipes 2 pump in cement grout, and the other two grouting pipes 2 press in paste-like filling material, and the operation is carried out alternately). After the cavity 10 is initially cleaned, the grouting pipe 2 presses in paste-like solidified filling material. Combined with the outward pulling effect of Example 1, the filling material can easily fill the cavity 10, thereby avoiding leaving gaps and improving the sealing quality.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting and treating cavities in a subway tunnel, comprising a protective plate (1), grouting pipes (2) arranged around the protective plate (1), and a suction pipe (3) arranged in the middle of the protective plate (1), characterized in that: The suction pipe (3) is slidably connected to the buried pipe (4). The buried pipe (4) is provided with an insertion hole. One end of the grouting pipe (2) is inserted into the insertion hole of the buried pipe (4). The piston (5) is slidably connected inside the buried pipe (4). One end of the piston (5) is fixedly connected to the support rod (6). The end of the support rod (6) is fixedly connected to the plug plate (7). The plug plate (7) is fixedly connected to one end of the suction pipe (3). The plug plate (7) is provided with a suction hole (71). Several settling tanks (31) are arranged at the end of the suction pipe (3). A hollow stirring rod (32) is hinged in the settling tank (31). The support rod (6) and piston (5) are hollow and are connected to the inner cavity of the stirring rod (32) through the pipe (711) on the inner wall of the plug plate (7). The outer arc surface of the stirring rod (32) is provided with a slurry outlet hole (322).

2. The device for detecting and controlling the location of voids in a subway tunnel according to claim 1, characterized in that: The suction tube (3) is provided with a pull plate (8) at the end. A drive motor (81) is fixedly connected to one side of the pull plate (8). The drive motor (81) drives the suction tube (3) to rotate through a gear set.

3. The device for detecting and controlling the location of voids in a subway tunnel according to claim 2, characterized in that: The settling tank (31) is spiral-shaped, and the stirring rod (32) is adapted to the settling tank (31).

4. The device for detecting and controlling the location of voids in a subway tunnel according to claim 3, characterized in that: The stirring rod (32) includes short rods (321) that are hinged together in sequence. A torsion spring is provided on the hinge shaft of the short rod (321). A metal hose (323) with an interconnected inner cavity is provided on the inner arc surface of the short rod (321) and is connected to the grouting pipe (2).

5. The device for detecting and controlling the location of voids in a subway tunnel according to claim 1, characterized in that: The suction pipe (3) is provided with a sliding hole, and a steel wire (9) is slidably connected in the sliding hole. One end of the steel wire (9) is provided with a pier, which is limited to one end face of the suction pipe (3). The other end of the steel wire (9) is fixedly connected to one side of the short rod (321).

6. The device for detecting and controlling the location of voids in a subway tunnel according to claim 1, characterized in that: The grouting pipe (2) is an arc-shaped pipe.

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