A device for advance grouting reinforcement in shield construction

Abstract

The application relates to an advanced grouting reinforcing device for shield construction, and relates to the technical field of advanced reinforcing construction in a shield machine head hole, which comprises a shield tunnel segment body, and a reinforcing module is arranged in the shield tunnel segment body. The bidirectional screw rod in the reinforcing module drives the synchronous movement of a moving plate and an arc-shaped steel plate, and the reinforcing device is matched with an antiskid pad, so that the problem of poor support adaptability of the existing device is solved, the sliding during grouting is avoided by increasing the friction, the movement track of the connecting rod constraint part of the rectangular shell is set by the guide column and the sliding sleeve, the limiting ring prevents excessive movement and damage of the part, the structural stability is enhanced, the meshing transmission of the first conical gear and the second conical gear and the first knob improve the operation flexibility and the adjustment efficiency, the reverse self-locking characteristics of the worm and the worm wheel in the adjusting module ensure that the angle of the grouting pipe body is stable and does not deviate, the second knob improves the angle adjustment precision, and the pipeline connecting piece facilitates the quick disassembly, maintenance and assembly of the grouting pipe body.

Description

Technical Field

[0001] This application relates to the field of advanced reinforcement construction technology for tunnel boring machine heads, and in particular to an advanced grouting reinforcement device for tunnel boring machine construction. Background Technology

[0002] With the widespread application of shield tunneling in urban subway construction, its advantages of "fast construction speed, low cost and high safety" are significant. However, the local / overall floating and settlement of shield tunnel segments remains a core problem that is difficult to solve in the long term. It is mainly affected by factors such as engineering geology, hydrogeology, grouting quality and shield attitude control, which seriously threatens construction safety and later operation stability.

[0003] While existing advanced grouting devices for shield tunneling can perform foundation grouting, they have certain deficiencies in structural adaptability, adjustment stability, and ease of operation, making it difficult to meet the needs of complex construction scenarios.

[0004] Most advanced grouting devices use fixed-size supports or single-end telescopic supports, which require customized supports for tunnels of different diameters, resulting in low versatility. Furthermore, the supports are mostly in hard contact with the inner wall of the tunnel segments, and are prone to sliding under the reaction force during grouting, leading to displacement of the grouting position and affecting the reinforcement effect. In order to solve the above problems, an advanced grouting reinforcement device for shield tunneling is proposed. Utility Model Content

[0005] The purpose of this application is to provide a device for advanced grouting reinforcement in shield tunneling construction, which has the advantages of simple structure, strong adaptability and stable adjustment, and solves the problems mentioned in the background art.

[0006] This application provides a technical solution for an advanced grouting reinforcement device for shield tunneling construction, comprising a shield tunnel segment body, a reinforcement module inside the shield tunnel segment body, adjustment modules on both sides of the reinforcement module, and a grouting pipe body installed inside each adjustment module. The reinforcement module includes a rectangular shell, and a bidirectional screw rod is rotatably sleeved on the inner wall of the rectangular shell. Two movable plates are threadedly connected to the outer surface of the bidirectional screw rod. A connecting rod is fixedly connected to the side of the two movable plates that are far apart from each other. An arc-shaped steel plate is fixedly connected to the end of the two connecting rods that are far apart from each other. An anti-slip pad is fixedly connected to the side of the two arc-shaped steel plates that are far apart from each other.

[0007] The adjustment module includes a bracket fixedly connected to the outer surface of a rectangular shell. A rotatable second rotating rod is installed on the inner wall of the bracket. A pipe connector is fixedly connected to one end of the second rotating rod. A grouting pipe body is installed on the inner wall of the pipe connector.

[0008] By adopting the above technical solution, the rotation of the bidirectional screw in the reinforcement module can drive two moving plates to move synchronously closer or further away along the axis of the bidirectional screw. This, in turn, drives the arc-shaped steel plate to move synchronously via the connecting rod, allowing the arc-shaped steel plate to adapt to the inner wall of shield tunnel segments with different inner diameters, thus solving the problem of poor support adaptability in existing devices. Simultaneously, the anti-slip pads on the surface of the arc-shaped steel plate increase the friction with the inner wall of the shield tunnel segment, preventing the device from sliding due to reaction forces during grouting, improving the overall support stability of the device, and solving the problem of grouting deviation caused by easy slippage in existing devices. The bracket in the adjustment module provides stable support for the second rotating rod. When the second rotating rod rotates, it can drive the pipe connector to rotate synchronously, thereby adjusting the grouting direction of the grouting pipe body. Furthermore, the pipe connector facilitates quick installation and disassembly of the grouting pipe body. When the grouting pipe body becomes blocked or damaged, maintenance can be completed without disassembling the entire adjustment module, improving operational convenience and solving the problems of complex disassembly and inconvenient maintenance of the grouting pipe in existing devices.

[0009] Preferably, the inner wall of the rectangular shell is fixedly connected to two guide posts, and the two sides of the two movable plates are slidably sleeved on the outer surfaces of the two guide posts.

[0010] By adopting the above technical solution, the guide column on the inner wall of the rectangular shell can limit the movement direction of the moving plate, prevent the moving plate from radially shifting when it moves with the bidirectional screw, ensure that the two moving plates always move synchronously in a parallel direction, further improve the accuracy of the fit between the arc-shaped steel plate and the inner wall of the shield tunnel segment, avoid unstable support due to the shift of the moving plate, and solve the problem of easy component shifting during the adjustment process of the existing device.

[0011] Preferably, the two connecting rods are slidably sleeved on the upper and lower ends of the rectangular outer shell, respectively.

[0012] By adopting the above technical solution, the connecting rod is slidably sleeved on the upper and lower ends of the rectangular shell, which can constrain the movement trajectory of the connecting rod, prevent the connecting rod from shaking during the movement or support of the arc-shaped steel plate, enhance the compactness and stability of the overall structure of the reinforcement module, ensure that the device always maintains a stable posture during grouting operations, and reduce the impact of component shaking on grouting accuracy.

[0013] Preferably, the outer surface of the bidirectional lead screw is fixedly connected with two limiting rings.

[0014] By adopting the above technical solution, it is possible to prevent the moving plate from moving too close or too far away when rotating with the bidirectional lead screw, avoid collision damage between the moving plate and the inner wall of the rectangular shell, guide column or other components, effectively protect the core components such as the bidirectional lead screw and the moving plate, extend the service life of the device, and solve the problem of damage caused by excessive movement of components in existing devices.

[0015] Preferably, a first bevel gear is fixedly connected to the outer surface of the bidirectional lead screw, a first rotating rod is rotatably connected to the inner wall of the rectangular shell, and a second bevel gear is fixedly connected to one end of the first rotating rod, the second bevel gear meshing with the first bevel gear.

[0016] By adopting the above technical solution, the rotation direction of the first rotating rod can be converted into the rotation direction of the bidirectional lead screw through the meshing transmission of the first bevel gear and the second bevel gear, so that the adjustment of the moving plate can be achieved without directly rotating the bidirectional lead screw, thereby improving the operational flexibility of the device.

[0017] Preferably, a first knob is fixedly connected to the other end of the first rotating rod.

[0018] By adopting the above technical solution, the first knob at the end of the first rotating rod provides the operator with a convenient point of force application. The operator can drive the first rotating rod, the second bevel gear and the first bevel gear transmission by rotating the first knob, thereby driving the bidirectional lead screw to rotate. The operation is more labor-saving, the adjustment efficiency is improved, and the problem of existing devices requiring tools and having cumbersome operation is solved.

[0019] Preferably, a worm gear is fixedly connected to the other end of the second rotating rod, and a worm that meshes with the worm gear is installed on the inner wall of the bracket.

[0020] By adopting the above technical solution, the meshing transmission of the worm and worm wheel has a reverse self-locking characteristic. That is, the worm can drive the worm wheel and the second rotating rod to rotate, but the grouting pipe body cannot drive the worm wheel to rotate in the reverse direction when it is subjected to the reaction force of the grout. This ensures that the angle of the grouting pipe body after adjustment remains stable, avoids angle deviation during grouting that affects the reinforcement effect, and solves the problem of the existing device having no self-locking of the grouting angle and being prone to deviation.

[0021] Preferably, a second knob is fixedly connected to the shaft end of the worm gear.

[0022] By adopting the above technical solution, the second knob at the end of the worm shaft allows the operator to accurately control the rotation amplitude of the worm, and then precisely adjust the grouting angle of the grouting pipe body through the worm wheel and the second rotating rod, so that the grouting pipe body can be accurately aligned with the reinforcement area in front of the shield machine head, improving the grouting accuracy and solving the problem of low angle adjustment accuracy and difficulty in aligning with the target area in the existing device.

[0023] In summary, this application includes at least one of the following beneficial technical effects: This advanced grouting reinforcement device for shield tunneling construction uses a bidirectional screw rod in the reinforcement module to drive the moving plate and arc-shaped steel plate to move synchronously. Combined with anti-slip pads, it solves the problem of poor support adaptability in existing devices and prevents slippage during grouting by increasing friction. Guide columns and connecting rods sliding on the rectangular outer shell constrain the movement trajectory of the components, while limit rings prevent damage from excessive movement, enhancing structural stability. The meshing transmission of the first and second bevel gears and the first knob improve operational flexibility and adjustment efficiency. The reverse self-locking characteristics of the worm gear and worm in the adjustment module ensure the stability of the grouting pipe body angle. The second knob improves the angle adjustment accuracy, and the pipe connectors facilitate quick disassembly and maintenance of the grouting pipe body. Overall, it achieves the comprehensive advantages of simple structure, strong adaptability, stable adjustment, and convenient operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall planar structure of this application; Figure 2 This is a top view of the structure of the first part of this application; Figure 3 This is a partial cross-sectional view of the structure of this application; Figure 4 This is a partial bottom view of the structure of this application; Figure 5 This is a top view of the second part of the structure of this application.

[0025] In the picture: 1. Shield tunnel segment body; 2. Reinforcement module; 201. Rectangular shell; 202. Two-way screw rod; 203. Moving plate; 204. Guide column; 205. Connecting rod; 206. Arc-shaped steel plate; 207. Anti-slip pad; 208. Limiting ring; 209. First bevel gear; 210. First rotating rod; 211. Second bevel gear; 212. First knob; 3. Adjustment module; 301. Support; 302. Second rotating rod; 303. Pipe connector; 304. Worm gear; 305. Worm; 306. Second knob; 4. Grouting pipe body. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0027] Example 1: A device for pre-grouting reinforcement in shield tunneling construction, referring to... Figure 1 , Figure 2 and Figure 3The system includes a shield tunnel segment body 1, with a reinforcement module 2 inside the shield tunnel segment body 1. Adjustment modules 3 are located on both sides of the reinforcement module 2, and each adjustment module 3 has a grouting pipe body 4 installed inside. The reinforcement module 2 includes a rectangular outer shell 201. A bidirectional screw 202 is rotatably sleeved on the inner wall of the rectangular outer shell 201. Two movable plates 203 are threadedly connected to the outer surface of the bidirectional screw 202. Two guide posts 204 are fixedly connected to the inner wall of the rectangular outer shell 201. The two movable plates 203 are slidably sleeved on the outer surfaces of the two guide posts 204. The guide posts 204 on the inner wall of the rectangular outer shell 201 can limit the movement direction of the movable plates 203, preventing radial displacement of the movable plates 203 as they move with the bidirectional screw 202, ensuring that the two movable plates 203 always move synchronously in a parallel direction, further enhancing the connection between the arc-shaped steel plate 206 and the shield tunnel segment body. The precision of the inner wall fit of body 1 avoids instability caused by the offset of the moving plate 203, solving the problem of easy component offset during the adjustment of existing devices. Connecting rods 205 are fixedly connected to the opposite sides of the two moving plates 203. Arc-shaped steel plates 206 are fixedly connected to the opposite ends of the two connecting rods 205. Anti-slip pads 207 are fixedly connected to the opposite sides of the two arc-shaped steel plates 206. The two connecting rods 205 are slidably sleeved on the upper and lower ends of the rectangular shell 201, respectively. The movement trajectory of the connecting rods 205 can be constrained, preventing the connecting rods 205 from shaking during the movement or support of the arc-shaped steel plates 206. This enhances the compactness and stability of the overall structure of the reinforcement module 2, ensuring that the device maintains a stable posture during grouting operations and reducing the impact of component shaking on grouting accuracy.

[0028] Reference Figure 2 , Figure 3 and Figure 5Two limiting rings 208 are fixedly connected to the outer surface of the bidirectional lead screw 202. These rings prevent the moving plate 203 from moving too close or too far away as the bidirectional lead screw 202 rotates, thus avoiding collision damage between the moving plate 203 and the inner wall of the rectangular outer shell 201, the guide post 204, or other components. This effectively protects the core components such as the bidirectional lead screw 202 and the moving plate 203, extending the service life of the device and solving the problem of damage caused by excessive movement of components in existing devices. A first bevel gear 209 is fixedly connected to the outer surface of the bidirectional lead screw 202, and a first rotating rod 210 is rotatably connected to the inner wall of the rectangular outer shell 201. A second bevel gear 211 is fixedly connected to one end of the first rotating rod 210. The second bevel gear 211 meshes with the first bevel gear 209. The meshing transmission between the first bevel gear 209 and the second bevel gear 211 can convert the rotation direction of the first rotating rod 210 to the rotation direction of the bidirectional lead screw 202. The adjustment of the moving plate 203 can be achieved without directly rotating the bidirectional lead screw 202, improving the operational flexibility of the device. The other end of the first rotating rod 210 is fixedly connected to the first knob 212. The first knob 212 at the end of the first rotating rod 210 provides a convenient point of force application for the operator. By rotating the first knob 212, the operator can drive the first rotating rod 210, the second bevel gear 211 and the first bevel gear 209 to drive the bidirectional lead screw 202 to rotate. The operation is more labor-saving, the adjustment efficiency is improved, and the problem of existing devices requiring tools and having cumbersome operation is solved.

[0029] Example 2: A device for pre-grouting reinforcement in shield tunneling construction, referring to... Figure 2 , Figure 3 and Figure 4Based on the same concept as Embodiment 1 above, this embodiment proposes an adjustment module 3 including a bracket 301 fixedly connected to the outer surface of a rectangular outer shell 201. A rotatable second rotating rod 302 is installed on the inner wall of the bracket 301. One end of the second rotating rod 302 is fixedly connected to a pipe connector 303. A grouting pipe body 4 is installed on the inner wall of the pipe connector 303. The other end of the second rotating rod 302 is fixedly connected to a worm gear 304. A worm 305 meshing with the worm gear 304 is installed on the inner wall of the bracket 301. The meshing transmission between the worm 305 and the worm gear 304 has a reverse self-locking characteristic, that is, the worm 305 can drive the worm gear 304 and the second rotating rod 302 to rotate, but the grouting pipe body 4 is affected by the grout. When the reaction force is applied, it cannot reverse the rotation of the worm gear 304, ensuring that the angle of the grouting pipe body 4 remains stable after adjustment. This avoids angle deviation during grouting, which affects the reinforcement effect and solves the problem of the existing device's lack of self-locking and easy deviation in grouting angle. The second knob 306 is fixedly connected to the rotating shaft end of the worm 305. The second knob 306 at the rotating shaft end of the worm 305 allows the operator to accurately control the rotation amplitude of the worm 305. Then, through the worm gear 304 and the second rotating rod 302, the grouting angle of the grouting pipe body 4 can be accurately adjusted, so that the grouting pipe body 4 can be accurately aligned with the reinforcement area in front of the shield machine head, improving the grouting accuracy and solving the problem of low angle adjustment accuracy and difficulty in aligning with the target area in the existing device.

[0030] The implementation principle of this application embodiment is as follows: First, the reinforcement module 2 is placed inside the shield tunnel segment body 1. The operator rotates the first knob 212, which drives the first rotating rod 210 and the second bevel gear 211 fixed at its end to rotate synchronously. Since the second bevel gear 211 meshes with the first bevel gear 209 on the outer surface of the bidirectional lead screw 202, the bidirectional lead screw 202 is driven to rotate stably on the inner wall of the rectangular shell 201. During the rotation of the bidirectional lead screw 202, the two moving plates 203 connected by threads on its outer surface will move closer or further away synchronously along the axial direction of the bidirectional lead screw 202. At the same time, the two moving plates 203... The two guide posts 204, which are laterally slidably fitted on the outer surface of the inner wall of the rectangular outer shell 201, can effectively constrain the movement trajectory of the moving plate 203 and prevent it from radially deviating. The moving plate 203 then drives the arc-shaped steel plate 206 to move synchronously through the connecting rod 205 until the anti-slip pad 207 on the side of the arc-shaped steel plate 206 away from the connecting rod 205 is tightly attached to the inner wall of the shield tunnel segment body 1, thus completing the fixing operation of the device. During this process, the two limiting rings 208 on the outer surface of the bidirectional screw 202 can prevent the moving plate 203 from moving excessively and colliding with the inner wall of the rectangular outer shell 201 or the guide posts 204 and causing damage. Then, based on the specific location of the stratum to be reinforced in front of the tunnel boring machine head, the operator rotates the second knob 306 at the shaft end of the worm 305 in the adjustment module 3, causing the worm 305 to rotate on the inner wall of the support 301. Because the worm 305 meshes with the worm wheel 304 at the end of the second rotating rod 302 away from the pipe connector 303, and the worm wheel and worm structure has a reverse self-locking characteristic, the rotation of the worm 305 will drive the worm wheel 304 and the second rotating rod 302 to rotate synchronously. The second rotating rod 302 then drives the grouting pipe body 4 to adjust to the angle corresponding to the stratum to be reinforced through the pipe connector 303, ensuring that the grouting pipe body 4 can be accurately aligned with the target area. Then, the external grouting equipment is connected to the grouting pipe body 4, and the grouting equipment is started to inject grout into the stratum to be reinforced. During the grouting process, the anti-slip pad 207 can increase the friction between the arc-shaped steel plate 206 and the inner wall of the shield tunnel segment body 1. The structure of the connecting rod 205 slidingly sleeved on the upper and lower ends of the rectangular shell 201 further enhances the overall stability of the reinforcement module 2 and prevents the device from sliding or shaking due to the reaction force of grouting.

Claims

1. A device for pre-grouting reinforcement in shield tunneling, comprising a shield tunnel segment body (1), characterized in that: The shield tunnel segment body (1) is provided with a reinforcement module (2) inside. The reinforcement module (2) is provided with adjustment modules (3) on both sides. Each adjustment module (3) is provided with a grouting pipe body (4) inside. The reinforcement module (2) includes a rectangular shell (201). The inner wall of the rectangular shell (201) is rotatably fitted with a two-way screw rod (202). The outer surface of the two-way screw rod (202) is threaded with two moving plates (203). The two moving plates (203) are fixedly connected with connecting rods (205) on the side away from each other. The two connecting rods (205) are fixedly connected with arc-shaped steel plates (206) on the side away from each other. The two arc-shaped steel plates (206) are fixedly connected with anti-slip pads (207) on the side away from each other. The adjustment module (3) includes a bracket (301) fixedly connected to the outer surface of the rectangular shell (201). A rotatable second rotating rod (302) is installed on the inner wall of the bracket (301). One end of the second rotating rod (302) is fixedly connected to a pipe connector (303). A grouting pipe body (4) is installed on the inner wall of the pipe connector (303).

2. The device for pre-grouting reinforcement in shield tunneling construction according to claim 1, characterized in that: The inner wall of the rectangular shell (201) is fixedly connected to two guide posts (204), and the two sides of the two movable plates (203) are respectively slidably sleeved on the outer surface of the two guide posts (204).

3. The device for pre-grouting reinforcement in shield tunneling construction according to claim 1, characterized in that: The two connecting rods (205) are slidably sleeved on the upper and lower ends of the rectangular outer shell (201).

4. The device for pre-grouting reinforcement in shield tunneling construction according to claim 1, characterized in that: Two limiting rings (208) are fixedly connected to the outer surface of the bidirectional lead screw (202).

5. The device for pre-grouting reinforcement in shield tunneling construction according to claim 1, characterized in that: The outer surface of the bidirectional lead screw (202) is fixedly connected to a first bevel gear (209), and the inner wall of the rectangular shell (201) is rotatably connected to a first rotating rod (210). One end of the first rotating rod (210) is fixedly connected to a second bevel gear (211), and the second bevel gear (211) meshes with the first bevel gear (209).

6. The device for pre-grouting reinforcement in shield tunneling construction according to claim 5, characterized in that: The other end of the first rotating rod (210) is fixedly connected to a first knob (212).

7. The device for pre-grouting reinforcement in shield tunneling construction according to claim 1, characterized in that: The other end of the second rotating rod (302) is fixedly connected to a worm gear (304), and the inner wall of the bracket (301) is equipped with a worm (305) that meshes with the worm gear (304).

8. The device for pre-grouting reinforcement in shield tunneling construction according to claim 7, characterized in that: The worm gear (305) has a second knob (306) fixedly connected to its shaft end.

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