A small-clearance shield tunnel structure retention device with grouting function

Abstract

This invention discloses a small-clearance shield tunnel structure retention device with grouting function, belonging to the technical field of tunnel structure retention devices. It includes a protective frame composed of an upper protective frame and a lower protective frame, and a reinforcing frame composed of an upper reinforcing frame and a lower reinforcing frame within the protective frame. It also includes a moving mechanism and a rotating mechanism. Through the rotating mechanism, a first motor drives a fixed block to move upwards, displacing it from the lower protective frame. This displacement then pushes the lower protective frame to move further until the upper and lower protective frames separate and the movable rod moves to one end of the movable frame. The fixed block then moves downwards, driving a second spur gear to rotate. The rotation of the second spur gear drives the movable rod to rotate, which in turn drives the lower protective frame to rotate. This rotation of the lower protective frame opens the lower part of the protective frame, facilitating the smooth transport of personnel and materials during tunnel construction and preventing the protective frame from obstructing passage.

Description

Technical Field

[0001] This invention relates to the field of tunnel structure retention devices, specifically a small-clearance shield tunnel structure retention device with grouting function. Background Technology

[0002] Small-clearance shield tunnels refer to tunnels where the clearance between two parallel shield tunnels is very small, often failing to meet the safety distance requirements for conventional shield tunnel construction. This type of tunnel structure faces numerous challenges during construction, such as ground displacement control, mutual interference between tunnel structures, and construction risk control. Maintaining the structure of small-clearance shield tunnels is a comprehensive engineering problem, requiring various technologies and measures to ensure the tunnel's stability and safety. Grouting reinforcement, compacted strata, prestressed anchoring, a reasonable construction sequence and excavation method, and monitoring and feedback are key measures for maintaining the stability of small-clearance shield tunnel structures. Among various solutions, grouting reinforcement combined with support structures is a widely used method for solving the construction problems of small-clearance shield tunnels. When supporting and protecting the tunnel interior, protective frames are needed, with reinforcing frames housed within the circular protective frame. However, existing shield tunnel support devices often obstruct traffic and transportation within the existing tunnel, making it difficult to ensure the smooth transport of personnel and materials during tunnel construction. To prevent the protective frame from affecting material transportation, a small-clearance shield tunnel structure maintenance device with grouting capabilities is provided. Summary of the Invention

[0003] The purpose of this invention is to provide a small-clearance shield tunnel structure retention device with grouting function in order to prevent the protective frame from affecting the transportation of materials.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a small-clearance shield tunnel structure holding device with grouting function, comprising a protective frame composed of an upper protective frame and a lower protective frame, wherein a reinforcing frame composed of an upper reinforcing frame and a lower reinforcing frame is provided inside the protective frame, the upper reinforcing frame is fixedly connected to the inner cavity of the upper protective frame, the lower reinforcing frame is fixedly connected to the inner cavity of the lower protective frame, the upper protective frame and the lower protective frame are moved by a moving mechanism, the lower protective frame is rotated by a rotating mechanism, and a scanning mechanism is provided on the outer wall of the upper protective frame and the lower protective frame;

[0005] The moving mechanism includes a mounting groove formed on the outer walls of the upper and lower protective frames. A mounting base is fixedly connected to the inner wall of the mounting groove. A first spur gear is symmetrically rotatably connected to both sides of the mounting base. A rotating rod is fixedly connected to the outer wall of the first spur gear. A roller is mounted on one end of the rotating rod. A support block extending to the top of the mounting base is slidably connected inside the mounting base. The support block is in contact with the first spur gear. A first threaded rod extending into the support block is rotatably connected inside the mounting base. A first bevel gear is fixedly connected to the bottom end of the first threaded rod. A second bevel gear is rotatably connected to the outer wall of the first bevel gear inside the mounting base. A rotating wheel is fixedly connected to one end of the second bevel gear. A plug rod is fixedly connected to the top of the support block on the upper protective frame.

[0006] As a further embodiment of the present invention: the rotating mechanism includes a groove, which is formed at the junction of the bottom end of the upper protective frame and the lower protective frame. A movable frame is fixedly connected to the inner wall of the groove, and a movable rod is fixedly connected to the top end of the lower protective frame. The movable rod is slidably connected to the inner wall of the movable frame, and a second spur gear is fixedly connected to the outer wall of the movable rod. A fixed seat is fixedly connected to the outer wall of the upper protective frame above the groove. A fixed block is slidably connected to the inner wall of the fixed seat. A first motor is installed at the top end of the fixed seat, and a second threaded rod is connected to the output end of the first motor. The second threaded rod extends into the interior of the fixed block.

[0007] As a further embodiment of the present invention: the scanning mechanism includes an annular groove, which is formed on one outer wall of the upper protective frame and the lower protective frame. An arc-shaped block is slidably connected to the inner wall of the annular groove. A vertical plate is fixedly connected to one end of the arc-shaped block. An infrared scanner is fixedly connected to the top end of the arc-shaped block. A third spur gear extending from the arc-shaped block is rotatably connected inside the arc-shaped block. A second motor is installed on the outer wall of the vertical plate. A connecting shaft is connected to the output end of the second motor. The third spur gear is fixedly connected to one end of the connecting shaft. A slurry outlet is provided at the top end of the vertical plate. A fixed cylinder is fixedly connected to the outer wall of the vertical plate above the second motor. A rotating tube is rotatably connected to the inner wall of the fixed cylinder.

[0008] As a further embodiment of the present invention: the bottom end of the support block is provided with a first threaded hole, the first threaded hole is matched with the first threaded rod, and the first bevel gear meshes with the second bevel gear.

[0009] As a further embodiment of the present invention: the support block has first toothed grooves on both sides, and the first toothed grooves mesh with the first spur gear.

[0010] As a further embodiment of the present invention: the outer walls of both ends of the movable rod are in contact with the inner wall of the movable frame, and the outer wall of the fixed block is provided with a second tooth groove, which meshes with the second spur gear.

[0011] As a further embodiment of the present invention: the top end of the fixing block is provided with a second threaded hole, which engages with the second threaded rod.

[0012] As a further aspect of the present invention: the outer wall of the arc-shaped block is arc-shaped, and the outer wall of the arc-shaped block is in contact with the inner wall of the vertical plate.

[0013] As a further embodiment of the present invention: the inner wall of the annular groove is provided with a third tooth groove, which meshes with the third spur gear.

[0014] As a further embodiment of the present invention: a limiting ring is fixedly connected to one end of the inner wall of the fixed cylinder, and a limiting groove is formed on the outer wall of the rotating tube, with the outer wall of the limiting ring fitting against the inner wall of the limiting groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By setting up a rotating mechanism, the first motor drives the fixed block to move upward, and the fixed block is displaced and separated from the lower protective frame. Then, it pushes the lower protective frame to move until the upper and lower protective frames are separated and the movable rod moves to one end of the movable frame. The fixed block moves downward, driving the second spur gear to rotate. The rotation of the second spur gear drives the movable rod to rotate, and the rotation of the movable rod drives the lower protective frame to rotate. The rotation of the lower protective frame opens the lower part of the protective frame, which facilitates the smooth transportation of personnel and materials in the tunnel construction and prevents the protective frame from obstructing passage.

[0017] 2. By setting up a moving mechanism, rotating the rotating wheel drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, the first bevel gear drives the first threaded rod to rotate, the first threaded rod drives the support block to move, the support block to move, the first spur gear drives the first straight gear to rotate, the first spur gear drives the rotating rod to rotate, and the rotating rod drives the roller to move. When the protective frame is moved, rotating the rotating wheel drives the support block to separate from the tunnel wall, while the roller contacts the tunnel wall. The roller drives the protective frame to move. After the movement is completed, rotating the rotating wheel drives the support block to contact the tunnel wall, fixing the protective frame and facilitating the movement of the protective frame. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the mounting base of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the mounting base of the present invention;

[0021] Figure 4 This is a schematic diagram showing the connection between the upper and lower protective frames of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the fixing base of the present invention;

[0023] Figure 6 This is a schematic diagram of the installation of the arc-shaped block of the present invention;

[0024] Figure 7 This is a schematic diagram of the internal structure of the arc-shaped block of the present invention;

[0025] Figure 8 This is a schematic diagram of the internal structure of the fixed cylinder and rotating tube of the present invention.

[0026] In the diagram: 1. Upper protective frame; 2. Lower protective frame; 3. Upper reinforcing frame; 4. Lower reinforcing frame; 5. Moving mechanism; 501. Mounting slot; 502. Mounting base; 503. First spur gear; 504. Rotating rod; 505. Roller; 506. Support block; 507. First threaded rod; 508. First bevel gear; 509. Second bevel gear; 510. Rotating wheel; 511. Insert rod; 6. Rotating mechanism; 601. Groove; 602. Movable frame; 6 03. Movable rod; 604. Second spur gear; 605. Fixed base; 606. Fixed block; 607. Second threaded rod; 608. First motor; 7. Scanning mechanism; 701. Annular groove; 702. Arc block; 703. Vertical plate; 704. Third spur gear; 705. Connecting shaft; 706. Second motor; 707. Infrared scanner; 708. Slurry outlet; 709. Fixed cylinder; 710. Rotating tube; 8. Limiting ring; 9. Limiting groove. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0029] Please see Figures 1 to 8 In this embodiment of the invention, a small-clearance shield tunnel structure holding device with grouting function includes a protective frame composed of an upper protective frame 1 and a lower protective frame 2. A reinforcing frame composed of an upper reinforcing frame 3 and a lower reinforcing frame 4 is provided inside the protective frame. The upper reinforcing frame 3 is fixedly connected to the inner cavity of the upper protective frame 1, and the lower reinforcing frame 4 is fixedly connected to the inner cavity of the lower protective frame 2. The upper protective frame 1 and the lower protective frame 2 are moved by a moving mechanism 5, and the lower protective frame 2 is rotated by a rotating mechanism 6. A scanning mechanism 7 is provided on the outer wall of the upper protective frame 1 and the lower protective frame 2. The moving mechanism 5 includes a mounting groove 501, which is formed on the outer wall of the upper protective frame 1 and the lower protective frame 2. A mounting seat 502 is fixedly connected to the inner wall of the mounting groove 501. The mounting seat 502 has two sides... A first spur gear 503 is symmetrically rotatably connected. A rotating rod 504 is fixedly connected to the outer wall of the first spur gear 503. A roller 505 is installed at one end of the rotating rod 504. A support block 506 extending to the top of the mounting base 502 is slidably connected inside the mounting base 502. The support block 506 is in contact with the first spur gear 503. A first threaded rod 507 extending into the support block 506 is rotatably connected inside the mounting base 502. A first bevel gear 508 is fixedly connected to the bottom end of the first threaded rod 507. A second bevel gear 509 is rotatably connected to the outer wall of the first bevel gear 508 inside the mounting base 502. A rotating wheel 510 is fixedly connected to one end of the second bevel gear 509. An insert rod 511 is fixedly connected to the top of the support block 506 on the upper protective frame 1.

[0030] In this embodiment: rotating the rotating wheel 510 drives the second bevel gear 509 to rotate, the second bevel gear 509 drives the first bevel gear 508 to rotate, the first bevel gear 508 drives the first threaded rod 507 to rotate, the first threaded rod 507 drives the support block 506 to move, the support block 506 moves and drives the first straight gear 503 to rotate, the first straight gear 503 moves and drives the rotating rod 504 to rotate, the rotating rod 504 moves and drives the roller 505 to move. When the protective frame is moved, rotating the rotating wheel 510 drives the support block 506 to separate from the tunnel wall, and at the same time the roller 505 contacts the tunnel wall. The roller 505 drives the protective frame to move. After the movement is completed, rotating the rotating wheel 510 drives the support block 506 to contact the tunnel wall, fixing the protective frame and facilitating the movement of the protective frame.

[0031] Please refer to this carefully. Figures 4 to 5 The rotating mechanism 6 includes a groove 601, which is located at the bottom of the upper protective frame 1 and the lower protective frame 2. A movable frame 602 is fixedly connected to the inner wall of the groove 601. A movable rod 603 is fixedly connected to the top of the lower protective frame 2. The movable rod 603 is slidably connected to the inner wall of the movable frame 602. A second spur gear 604 is fixedly connected to the outer wall of the movable rod 603. A fixed seat 605 is fixedly connected to the outer wall of the upper protective frame 1 above the groove 601. A fixed block 606 is slidably connected to the inner wall of the fixed seat 605. A first motor 608 is installed at the top of the fixed seat 605. A second threaded rod 607 is connected to the output end of the first motor 608. The second threaded rod 607 extends into the interior of the fixed block 606.

[0032] In this embodiment: when materials need to be transported through the protective frame, the first motor 608 is started. The first motor 608 drives the second threaded rod 607 to rotate. The rotation of the second threaded rod 607 drives the fixed block 606 to move upward. The fixed block 606 is displaced and separates from the lower protective frame 2. Then, the lower protective frame 2 is pushed to move. At this time, the movable rod 603 slides in the movable frame 602 until the upper protective frame 1 and the lower protective frame 2 are separated and the movable rod 603 moves to one end of the movable frame 602. The first motor 608 is started to drive the fixed block 606 to move downward. The fixed block 606 is displaced and contacts the second spur gear 604. Then, the second spur gear 604 is driven to rotate. The rotation of the second spur gear 604 drives the movable rod 603 to rotate. The rotation of the movable rod 603 drives the lower protective frame 2 to rotate. The rotation of the lower protective frame 2 opens the lower part of the protective frame, facilitating the transport of materials through the protective frame.

[0033] When the lower protective frame 2 is reset, the fixing block 606 moves to drive the lower protective frame 2 to reset. Then, the lower protective frame 2 is pushed to the bottom of the upper protective frame 1. The fixing block 606 moves down again to contact the lower protective frame 2, thereby fixing the upper protective frame 1 and the lower protective frame 2. This facilitates the smooth transportation of personnel and materials for tunnel construction and prevents the protective frame from obstructing passage.

[0034] Please refer to this carefully. Figures 6 to 8 The scanning mechanism 7 includes an annular groove 701, which is formed on one outer wall of the upper protective frame 1 and the lower protective frame 2. An arc-shaped block 702 is slidably connected to the inner wall of the annular groove 701. A vertical plate 703 is fixedly connected to one end of the arc-shaped block 702. An infrared scanner 707 is fixedly connected to the top end of the arc-shaped block 702. A third spur gear 704 extending out of the arc-shaped block 702 is rotatably connected inside the arc-shaped block 702. A second motor 706 is installed on the outer wall of the vertical plate 703. A connecting shaft 705 is connected to the output end of the second motor 706. The third spur gear 704 is fixedly connected to one end of the connecting shaft 705. A slurry outlet 708 is provided at the top end of the vertical plate 703. A fixed cylinder 709 is fixedly connected to the outer wall of the vertical plate 703 above the second motor 706. A rotating tube 710 is rotatably connected to the inner wall of the fixed cylinder 709.

[0035] In this embodiment: the second motor 706 is started, and the second motor 706 drives the connecting shaft 705 to rotate. The rotation of the connecting shaft 705 drives the third spur gear 704 to rotate. The rotation of the third spur gear 704 drives the arc block 702 to slide in the annular groove 701, thereby causing the arc block 702 to move in a circle. The displacement of the arc block 702 drives the infrared scanner 707 to move. During the movement, the infrared scanner 707 scans the internal contour of the tunnel. When grouting is performed inside the tunnel, the grouting pipe is connected to the rotating pipe 710, and then the grouting operation is performed through the grout outlet 708.

[0036] Please refer to this carefully. Figures 1 to 3 The bottom end of the support block 506 is provided with a first threaded hole, which matches the first threaded rod 507, and the first bevel gear 508 meshes with the second bevel gear 509.

[0037] In this embodiment: rotating the rotating wheel 510 drives the second bevel gear 509 to rotate, the rotation of the second bevel gear 509 drives the first bevel gear 508 to rotate, the rotation of the first bevel gear 508 drives the first threaded rod 507 to rotate, and the rotation of the first threaded rod 507 drives the support block 506 to move.

[0038] Please refer to this carefully. Figures 1 to 3 The support block 506 has first toothed grooves on both sides, and the first toothed grooves mesh with the first spur gear 503.

[0039] In this embodiment: the displacement of the support block 506 causes the first spur gear 503 to rotate, the rotation of the first spur gear 503 causes the rotating rod 504 to rotate, and the rotation of the rotating rod 504 causes the roller 505 to move.

[0040] Please refer to this carefully. Figures 4 to 5 The outer walls of both ends of the movable rod 603 are in contact with the inner wall of the movable frame 602. The outer wall of the fixed block 606 is provided with a second tooth groove, which meshes with the second spur gear 604. The top of the fixed block 606 is provided with a second threaded hole, which meshes with the second threaded rod 607.

[0041] In this embodiment: the first motor 608 drives the second threaded rod 607 to rotate, the rotation of the second threaded rod 607 drives the fixed block 606 to move upward, the fixed block 606 displaces and separates from the lower protective frame 2, and then pushes the lower protective frame 2 to move. At this time, the movable rod 603 slides in the movable frame 602 until the upper protective frame 1 and the lower protective frame 2 separate and the movable rod 603 moves to one end of the movable frame 602. The first motor 608 is started to drive the fixed block 606 to move downward, the fixed block 606 displaces and contacts the second spur gear 604, and then drives the second spur gear 604 to rotate. The rotation of the second spur gear 604 drives the movable rod 603 to rotate, and the rotation of the movable rod 603 drives the lower protective frame 2 to rotate.

[0042] Please refer to this carefully. Figures 6 to 8 The outer wall of the arc-shaped block 702 is arc-shaped and fits against the inner wall of the vertical plate 703. The inner wall of the annular groove 701 is provided with a third tooth groove, which meshes with the third spur gear 704.

[0043] In this embodiment: the second motor 706 drives the connecting shaft 705 to rotate, the connecting shaft 705 rotates and drives the third spur gear 704 to rotate, the third spur gear 704 rotates and drives the arc block 702 to slide within the vertical plate 703, thereby causing the arc block 702 to move in a circle.

[0044] Please refer to this carefully. Figures 6 to 8 A limiting ring 8 is fixedly connected to one end of the inner wall of the fixed cylinder 709, and a limiting groove 9 is opened on the outer wall of the rotating tube 710. The outer wall of the limiting ring 8 fits against the inner wall of the limiting groove 9.

[0045] In this embodiment: when the rotating tube 710 rotates inside the fixed cylinder 709, the limiting ring 8 rotates inside the limiting groove 9, thereby positioning the rotating tube 710.

[0046] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A small-clearance shield tunnel structure retention device with grouting function, characterized in that, The protective frame includes an upper protective frame (1) and a lower protective frame (2). The protective frame is provided with a reinforcement frame consisting of an upper reinforcement frame (3) and a lower reinforcement frame (4). The upper reinforcement frame (3) is fixedly connected to the inner cavity of the upper protective frame (1), and the lower reinforcement frame (4) is fixedly connected to the inner cavity of the lower protective frame (2). The upper protective frame (1) and the lower protective frame (2) are moved by a moving mechanism (5), and the lower protective frame (2) is rotated by a rotating mechanism (6). The outer walls of the upper protective frame (1) and the lower protective frame (2) are provided with a scanning mechanism (7). The moving mechanism (5) includes a mounting groove (501), which is formed on the outer wall of the upper protective frame (1) and the lower protective frame (2). A mounting base (502) is fixedly connected to the inner wall of the mounting groove (501). A first spur gear (503) is symmetrically rotatably connected to both sides of the mounting base (502). A rotating rod (504) is fixedly connected to the outer wall of the first spur gear (503). A roller (505) is installed at one end of the rotating rod (504). A support block (506) extending to the top of the mounting base (502) is slidably connected inside the mounting base (502). The support block (506) is in contact with the first spur gear (503). The mounting base (502) is rotatably connected to a first threaded rod (507) extending into the support block (506). The bottom end of the first threaded rod (507) is fixedly connected to a first bevel gear (508). The inside of the mounting base (502) is rotatably connected to a second bevel gear (509) located on the outer wall of the first bevel gear (508). One end of the second bevel gear (509) is fixedly connected to a rotating wheel (510). The top end of the support block (506) on the upper protective frame (1) is fixedly connected to a plug rod (511).

2. The small-clearance shield tunnel structure retention device with grouting function according to claim 1, characterized in that, The rotating mechanism (6) includes a groove (601), which is located at the junction of the bottom end of the upper protective frame (1) and the lower protective frame (2). A movable frame (602) is fixedly connected to the inner wall of the groove (601). A movable rod (603) is fixedly connected to the top end of the lower protective frame (2). The movable rod (603) is slidably connected to the inner wall of the movable frame (602). A second spur gear (604) is fixedly connected to the outer wall of the movable rod (603). A fixed seat (605) is fixedly connected to the outer wall of the upper protective frame (1) above the groove (601). A fixed block (606) is slidably connected to the inner wall of the fixed seat (605). A first motor (608) is installed at the top end of the fixed seat (605). A second threaded rod (607) is connected to the output end of the first motor (608). The second threaded rod (607) extends into the interior of the fixed block (606).

3. A small-clearance shield tunnel structure retention device with grouting function according to claim 2, characterized in that, The scanning mechanism (7) includes an annular groove (701), which is formed on one outer wall of the upper protective frame (1) and the lower protective frame (2). An arc-shaped block (702) is slidably connected to the inner wall of the annular groove (701). A vertical plate (703) is fixedly connected to one end of the arc-shaped block (702). An infrared scanner (707) is fixedly connected to the top of the arc-shaped block (702). A third spur gear extending from the arc-shaped block (702) is rotatably connected inside the arc-shaped block (702). 704), a second motor (706) is installed on the outer wall of the vertical plate (703), the output end of the second motor (706) is connected to a connecting shaft (705), the third spur gear (704) is fixedly connected to one end of the connecting shaft (705), the top of the vertical plate (703) is provided with a slurry outlet (708), the outer wall of the vertical plate (703) is fixedly connected to a fixed cylinder (709) above the second motor (706), and the inner wall of the fixed cylinder (709) is rotatably connected to a rotating tube (710).

4. A small-clearance shield tunnel structure retention device with grouting function according to claim 1, characterized in that, The support block (506) has a first threaded hole at its bottom end, which matches the first threaded rod (507), and the first bevel gear (508) meshes with the second bevel gear (509).

5. A small-clearance shield tunnel structure retention device with grouting function according to claim 1, characterized in that, The support block (506) has first toothed grooves on both sides, and the first toothed grooves mesh with the first spur gear (503).

6. A small-clearance shield tunnel structure retention device with grouting function according to claim 2, characterized in that, The outer walls of both ends of the movable rod (603) are in contact with the inner wall of the movable frame (602), and the outer wall of the fixed block (606) is provided with a second tooth groove, which meshes with the second spur gear (604).

7. A small-clearance shield tunnel structure retention device with grouting function according to claim 2, characterized in that, The top of the fixing block (606) is provided with a second threaded hole, which engages with the second threaded rod (607).

8. A small-clearance shield tunnel structure retention device with grouting function according to claim 3, characterized in that, The outer wall of the arc-shaped block (702) is arc-shaped, and the outer wall of the arc-shaped block (702) is in contact with the inner wall of the vertical plate (703).

9. A small-clearance shield tunnel structure retention device with grouting function according to claim 3, characterized in that, The inner wall of the annular groove (701) is provided with a third tooth groove, which meshes with the third spur gear (704).

10. A small-clearance shield tunnel structure retention device with grouting function according to claim 3, characterized in that, A limiting ring (8) is fixedly connected to one end of the inner wall of the fixed cylinder (709), and a limiting groove (9) is opened on the outer wall of the rotating tube (710). The outer wall of the limiting ring (8) fits against the inner wall of the limiting groove (9).

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