Shield segment secondary grouting structure of shield tunneling machine

Abstract

The utility model relates to a shield segment secondary grouting structure of a shield tunneling machine and relates to the technical field of shield tunneling machines, the secondary grouting structure comprises a machine base and a clamping mechanism, and the clamping mechanism comprises two clamping pieces which are arranged on the machine base in an opposite sliding mode; and the driving assembly drives the two clamping pieces to get close to each other and clamp and position the grouting pipe, or drives the two clamping pieces to get away from each other and unlock the grouting pipe. Through cooperation of the two clamping pieces, the clamping and positioning effect on the grouting pipe is improved, so that the probability that the grouting pipe moves is reduced, convenience in the operation process is improved, the construction efficiency and effect are improved, and the water seepage prevention effect of the shield segment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of shield machines, and in particular to a secondary grouting structure for shield segments of a shield machine. Background Art

[0002] The shield method is the main construction method for subway and tunnel construction. It pushes the shield machine into the ground, supports the surrounding rock with the shield shell and shield segments to prevent collapse into the tunnel, and uses a cutting device to excavate the soil in front of the excavation face, transports it out of the hole through the excavation machinery, pressurizes and pushes it forward at the rear with jacks, and assembles precast concrete shield segments to form a mechanized construction method of tunnel structure.

[0003] After the shield segments are assembled, anti-seepage construction is required, which is also an important step in shield construction. Under normal circumstances, the grouting pipe is extended through the secondary grouting holes pre-set on the shield segments to the outside of the shield segments for grouting to achieve sealing. However, when the shield tunnel passes through water-rich areas such as pressurized water layers, the soil outside the shield segments has a large water content, thus forming fluid soils such as cement mixtures or cement sand. These fluid soils will easily push the grouting pipe to move, so that during the construction process, slurry filling can only be carried out in a very shallow area outside the shield segments, thereby reducing the construction effect and the anti-seepage effect of the shield segments. Utility Model Content

[0004] In order to improve construction efficiency and enhance the water seepage prevention effect of shield segments, the present application provides a secondary grouting structure for shield segments of a shield machine.

[0005] The present application provides a shield segment secondary grouting structure for a shield machine, which adopts the following technical solution:

[0006] A shield segment secondary grouting structure of a shield machine comprises a machine base detachably arranged on a secondary grouting hole, wherein the machine base is provided with a clamping mechanism for clamping and positioning a grouting pipe, and the clamping mechanism comprises:

[0007] Two clips are slidably arranged on the machine base towards each other;

[0008] The driving assembly drives the two clamps to approach each other and clamp the grouting pipe for positioning, or drives the two clamps to move away from each other and unlock the grouting pipe.

[0009] By adopting the above technical solution, the machine base is first fixedly installed on the secondary grouting hole, and then the grouting pipe is extended to the outside of the shield segment through the two clamps. The position of the grouting pipe is adjusted, and the driving assembly drives the two clamps to cooperate in clamping the grouting pipe, and the grouting pipe is started for grouting construction; after the construction is completed, the driving assembly drives the two clamps away from the grouting pipe, and then the grouting pipe and the machine base are removed, and then the subsequent anti-water seepage construction is carried out.

[0010] The cooperation of the two clips improves the clamping and positioning effect of the grouting pipe, thereby reducing the probability of the grouting pipe moving, and also improves the convenience during operation, improves the construction efficiency and effect, and improves the anti-water seepage effect of the shield segment.

[0011] Optionally, the base is provided with an inclined moving surface, the clip is slidably mounted on the moving surface, and the driving assembly comprises:

[0012] A driving ring, threadedly connected to the machine base;

[0013] The rotating ring is rotatably arranged on the driving ring and is slidably connected with the clamping pieces through a connecting piece. The driving ring rotates to drive the rotating ring to move. The movement of the rotating ring drives the two clamping pieces to move closer to or farther from each other through the connecting piece.

[0014] By adopting the above technical scheme, the driving ring rotates to drive the rotating ring to move, and the movement of the rotating ring drives the two clamps to move on the moving surface through the connecting piece, so that the two clamping pieces are close to or away from each other, and the two clamps are slidably connected to the rotating ring. The rotating ring is used to adapt to the rotation of the driving ring and will not drive the two clamps to rotate, so that the movement of the clamps is more stable, and the two clamps are brought close to or away from each other; and when the grouting pipe moves back to push the two clamps to have a tendency to move away from each other, the thrust on the two clamps is dispersed into forces in two directions through the inclined moving surface, thereby reducing the strength of the force between the two clamps, the rotating ring and the driving ring, thereby further improving the positioning effect of the grouting pipe, reducing the probability of movement of the grouting pipe, and improving the anti-seepage effect of the shield segment.

[0015] Optionally, a movable groove is provided on the rotating ring, and the connecting member is a connecting column arranged on the clamping piece and sliding on the movable groove.

[0016] By adopting the above technical solution, the connecting column and the movable groove are slidingly connected, and thus the connection is slidingly connected through the arc surface, which reduces the resistance generated when the clip slides, improves the convenience during operation, and improves the construction efficiency.

[0017] Optionally, the machine base is cylindrical and threadedly connected to the secondary grouting hole, and a positioning component is provided on the machine base for pressing against the shield segment and positioning the machine base.

[0018] By adopting the above technical solution, the machine base is threadedly connected to the secondary grouting hole, and then the machine base is positioned by the positioning assembly, which makes it convenient to connect the machine base to the secondary grouting hole and improves the construction efficiency. In addition, by positioning the machine base by the positioning assembly, the probability of the drive base rotating when the drive ring rotates and causing the machine base to be separated from the secondary grouting hole is reduced.

[0019] Optionally, the positioning component includes:

[0020] A positioning ring is sleeved on the machine base and has elasticity;

[0021] The positioning nut is threadedly connected to the machine base and pushes the positioning ring to press against the shield segment to position the machine base.

[0022] By adopting the above technical scheme, the positioning nut rotates to push the positioning ring to press against the shield segment for positioning, and the inner wall of the shield segment is an arc-shaped structure. Therefore, the machine base is positioned by the cooperation of the positioning nut and the positioning ring, which reduces the probability of the machine base rotating and separating from the secondary grouting hole; at the same time, the positioning ring can fit with the inner wall of the shield segments of different sizes, thereby further improving the positioning effect of the machine base.

[0023] Optionally, the machine base is provided with a screwing portion which is in the shape of a regular hexagon and is convenient for being screwed using a tool, and the drive ring is provided with a plurality of drive rods which are convenient for rotating the drive ring at intervals.

[0024] By adopting the above technical solution, the convenience of threading the machine base to the secondary grouting hole is further improved, and the driving rod improves the convenience of rotating the driving ring, thereby improving the construction convenience and improving the construction efficiency.

[0025] Optionally, both of the two clamps are provided with a clamping surface that is arc-shaped and fits the grouting pipe.

[0026] By adopting the above technical solution, the positioning effect of the grouting pipe is further improved, and the anti-water seepage effect of the shield segment is improved.

[0027] Optionally, the clip is provided with a positioning strip which is elastic and presses against the grouting pipe for positioning.

[0028] By adopting the above technical solution, the positioning strip is pressed against the grouting pipe and deformed, and when the grouting pipe moves, the friction between the positioning strip and the grouting pipe is relatively large, which further improves the positioning effect of the grouting pipe and improves the anti-water seepage effect of the shield segment.

[0029] Optionally, the two clips abut against each other to be positioned and cooperate to clamp the grouting pipe.

[0030] By adopting the above technical solution, the probability of damage to the grouting pipe due to excessive extrusion pressure is reduced.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] The cooperation of the two clips improves the clamping and positioning effect of the grouting pipe, thereby reducing the probability of the grouting pipe moving, and also improves the convenience during operation, improves the construction efficiency and effect, and improves the anti-water seepage effect of the shield segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the secondary grouting structure;

[0034] Figure 2 It is a cross-sectional schematic diagram of the secondary grouting structure.

[0035] Figure numerals: 1. base; 11. threaded section; 12. connecting hole; 13. first through hole; 14. truncated cone hole; 15. second through hole; 16. moving surface; 17. screwing part; 2. positioning assembly; 21. positioning ring; 22. positioning nut; 3. clamping mechanism; 31. clip; 4. driving assembly; 41. driving ring; 42. rotating ring; 43. connecting part; 44. driving part; 45. third through hole; 46. moving groove; 47. driving rod; 48. connecting piece; 5. grouting pipe; 6. secondary grouting hole. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-2 This application is described in further detail.

[0037] An embodiment of the present application discloses a secondary grouting structure for a shield segment of a shield machine.

[0038] Reference Figure 1 The shield segment secondary grouting structure of the shield machine includes a machine base 1 detachably arranged on the secondary grouting hole 6, and a clamping mechanism 3 for clamping and positioning the grouting pipe 5 is arranged on the machine base 1.

[0039] Reference Figure 1 and Figure 2 The machine base 1 is cylindrical, and a threaded section 11 is provided on the outer side wall of the top of the machine base 1. A connecting hole 12 that passes through both ends of the machine base 1 is coaxially provided on the inner side wall of the machine base 1. The connecting hole 12 includes a first through hole 13, a truncated cone hole 14 and a second through hole 15 that are connected in sequence. The first through hole 13 is located on the side of the truncated cone hole 14 close to the threaded section 11. The diameter of the first through hole 13 is smaller than the diameter of the second through hole 15 and larger than the diameter of the grouting pipe 5. The truncated cone hole 14 is truncated cone-shaped and one end has the same diameter as the first through hole 13 and the other end has the same diameter as the second through hole 15. An inclined moving surface 16 is formed on the truncated cone hole 14.

[0040] The threaded section 11 is threadedly connected to the secondary grouting hole 6, and a hexagonal screwing portion 17 is coaxially fixedly installed on the outer side wall of the bottom of the machine base 1. The screwing portion 17 is convenient for cooperating with a tool to drive the machine base 1 to rotate.

[0041] The machine base 1 is provided with a positioning assembly 2 which presses against the shield segment and positions the machine base 1. The positioning assembly 2 includes a positioning ring 21 and a positioning nut 22. The positioning ring 21 is sleeved on the machine base 1 and has a certain elasticity. The positioning ring 21 fits against the inner wall of the shield segment for positioning. Therefore, when used to position shield segments of different sizes, it can be replaced with a positioning ring 21 that is compatible with it. The positioning nut 22 is threadedly connected to the threaded section 11, and the positioning nut 22 pushes the positioning ring 21 to press against the inner wall of the shield segment for positioning, thereby realizing the positioning of the machine base 1.

[0042] The clamping mechanism 3 includes two clamps 31 and a driving assembly 4. The two clamps 31 are slidably mounted on the moving surface 16 and are located on both sides of the axis of the machine base 1. The driving assembly 4 is used to drive the two clamps 31 to approach each other and clamp and position the grouting pipe 5, or drive the two clamps 31 to move away from each other and unlock the grouting pipe 5.

[0043] The driving assembly 4 includes a driving ring 41 and a rotating ring 42. The driving ring 41 is coaxially arranged with the machine base 1. The driving ring 41 includes a connecting portion 43 and a driving portion 44. The connecting portion 43 is threadedly connected to the second through hole 15 and extends to the outside of the machine base 1. A third through hole 45 with a diameter larger than the diameter of the grouting pipe 5 and facilitating the passage of the grouting pipe 5 is provided in the connecting portion 43. The driving portion 44 is integrally arranged on the outer side wall of the connecting portion 43 away from one end of the two clips 31. The driving portion 44 rotates to drive the connecting portion 43 to rotate and move simultaneously. A plurality of threaded holes are provided on the outer side wall of the driving portion 44 in a circular array around the axis of the driving portion 44. A driving rod 47 can be threadedly connected to the threaded hole. The driving rod 47 facilitates the use of force when rotating the driving ring 41.

[0044] The rotating ring 42 is coaxially rotatably mounted on one end of the connecting portion 43 close to the clip 31. The inner diameter of the rotating ring 42 is larger than the diameter of the third through hole 45 and the outer diameter is smaller than the outer diameter of the connecting portion 43. A moving groove 46 is provided along the radial direction of the rotating ring 42 at one end of the rotating ring 42 close to the two clips 31. The moving groove 46 penetrates the rotating ring 42. The rotating ring 42 is slidably connected to the two clips 31 respectively through two connecting members 48. The connecting member 48 is a connecting column. The connecting column is fixedly mounted on the clip 31 and slidably mounted on the moving groove 46, so that the driving ring 41 rotates to drive the rotating ring 42 to move. The rotating ring 42 moves to drive the two clips 31 to approach or move away from each other, and the two clips 31 are slidably connected to the rotating ring 42 through the connecting member 48.

[0045] The two clamps 31 are both provided with arc-shaped clamping surfaces that fit the grouting pipe 5 , and the two clamping surfaces are provided with positioning strips that are elastic and press against the grouting pipe 5 for positioning. At the same time, the two clamps 31 are pressed against each other for positioning.

[0046] The working principle of the embodiment of the present application is as follows:

[0047] The machine base 1 is threadedly connected to the secondary grouting hole 6, and the positioning nut 22 is turned to push the positioning ring 21 to press against the shield segment to position the machine base 1, so as to connect the machine base 1 to the secondary grouting hole 6; then the grouting pipe 5 is passed through the driving ring 41 and the rotating ring 42, and then passed through between the two clamps 31 to the outside of the shield segment, and the position of the grouting pipe 5 is moved. After the movement is completed, the driving ring 41 is turned to push the rotating ring 42 to move, so that the two clamps 31 are close to each other and clamped on the grouting pipe 5 for positioning, and the grouting pipe 5 is started for grouting, so as to complete the shield segment waterproofing construction.

[0048] After the construction is completed, the driving ring 41 is turned to drive the two clamps 31 to move away from each other, and the positioning nut 22 is turned away from the shield segment. Then, the machine base 1 is turned to disengage from the secondary grouting hole 6, and the grouting pipe 5 is pulled out. Then, subsequent shield segment waterproofing construction is carried out, thereby reducing the probability of displacement of the grouting pipe 5 during construction, and also improving the convenience of the construction process, and improving the construction efficiency and waterproofing effect.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A shield segment secondary grouting structure of a shield machine, characterized in that: It comprises a machine base (1) which is detachably arranged on a secondary grouting hole (6), the machine base (1) being provided with a clamping mechanism (3) for clamping and positioning a grouting pipe (5), the clamping mechanism (3) comprising: Two clips (31) are slidably disposed on the machine base (1) toward each other; The driving assembly (4) drives the two clamping pieces (31) to move closer to each other and clamp and position the grouting pipe (5), or drives the two clamping pieces (31) to move away from each other and unlock the grouting pipe (5).

2. The shield segment secondary grouting structure of a shield machine according to claim 1, characterized in that: The base (1) is provided with an inclined moving surface (16), the clip (31) is slidably mounted on the moving surface (16), and the driving assembly (4) comprises: A drive ring (41) is threadedly connected to the base (1); The rotating ring (42) is rotatably arranged on the driving ring (41) and is slidably connected to the clamping pieces (31) via a connecting piece (48); the driving ring (41) rotates to push the rotating ring (42) to move; the movement of the rotating ring (42) drives the two clamping pieces (31) to move closer to or farther from each other via the connecting piece (48).

3. The shield segment secondary grouting structure of a shield machine according to claim 2, characterized in that: The rotating ring (42) is provided with a moving groove (46), and the connecting member (48) is a connecting column arranged on the clamping piece (31) and sliding on the moving groove (46).

4. The shield segment secondary grouting structure of a shield machine according to claim 2, characterized in that: The machine base (1) is cylindrical and is threadedly connected to the secondary grouting hole (6). The machine base (1) is provided with a positioning component (2) that presses against the shield segment and positions the machine base (1).

5. The shield segment secondary grouting structure of a shield machine according to claim 4, characterized in that: The positioning component (2) comprises: A positioning ring (21) is sleeved on the machine base (1) and has elasticity; The positioning nut (22) is threadedly connected to the machine base (1) and pushes the positioning ring (21) to press against the shield segment to position the machine base (1).

6. The shield segment secondary grouting structure of a shield machine according to claim 5, characterized in that: The machine base (1) is provided with a screwing portion (17) in the shape of a regular hexagon and convenient for screwing with a tool, and the drive ring (41) is provided with a plurality of drive rods (47) at intervals for conveniently rotating the drive ring (41).

7. The shield segment secondary grouting structure of a shield machine according to claim 1, characterized in that: The two clamping pieces (31) are both provided with a clamping surface in an arc shape and in contact with the grouting pipe (5).

8. The shield segment secondary grouting structure of a shield machine according to claim 1, characterized in that: The clamping piece (31) is provided with a positioning strip which is elastic and presses against the grouting pipe (5) for positioning.

9. The shield segment secondary grouting structure of a shield machine according to claim 1, characterized in that: The two clamping pieces (31) are positioned against each other and cooperate to clamp the grouting pipe (5).

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