Steel sleeve reinforcing device suitable for large-diameter shield

Abstract

A steel sleeve reinforcing device suitable for a large-diameter shield comprises a steel sleeve, a steel wire rope and a tightening device, the steel wire rope is wound on the outer wall of the steel sleeve in the circumferential direction, one end of the steel wire rope is fixedly arranged, the other end of the steel wire rope is connected with the tightening device, and the steel wire rope is tightened through the tightening device so that the steel wire rope can be tightly hooped on the steel sleeve. Circumferential constraint is formed on the steel sleeve through the steel wire rope, the circumferential rigidity of the sleeve body is remarkably improved, inward pressure can be applied to the steel sleeve when the steel wire rope is tightened, part of in-bin pressure can be counteracted through the inward pressure of the steel wire rope after the in-bin pressure is established by the shield tunneling machine, and the steel sleeve is prevented from spalling or buckling. Therefore, the technical difficulty existing when a large-diameter shield tunneling machine starts and arrives at a large-burial-depth water-rich soft soil layer is solved, water and sand gushing accidents are prevented, construction risks are reduced, construction safety is ensured, meanwhile, the tightening force of the steel wire rope can be dynamically adjusted through the tightening device, the device can adapt to load changes under different geological conditions, and the working efficiency is improved. Long-term stability of the structure is ensured.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine (TBM) equipment, and in particular to a steel sleeve reinforcement device suitable for large-diameter TBMs. Background Technology

[0002] In shield tunneling, the steel sleeve is a key support structure during the initial and final stages of the tunnel boring machine (TBM), and its strength, rigidity, and sealing performance directly affect construction safety. Currently, most conventional TBMs in China have a diameter of less than 10 meters, and the design standards for their steel sleeves are relatively mature, meeting the construction needs under general geological conditions.

[0003] However, with the increasing application of large-diameter shield tunnels (such as those over 12 meters), traditional steel sleeves face severe challenges in complex working conditions such as high burial depth, high water pressure, and soft strata. The main challenge lies in insufficient structural reliability: when conducting shield tunneling in deep, water-rich, and soft strata, conventionally designed steel sleeves are prone to deformation due to external water and soil pressure, leading to joint leakage. In severe cases, water and sand inrush accidents may even occur, posing a significant safety risk. Utility Model Content

[0004] To address the aforementioned technical problems, this invention provides a steel sleeve reinforcement device suitable for large-diameter tunnel boring machines (TBMs). This reinforcement device enhances the overall stability and strength of the steel sleeve, thereby solving the technical difficulties encountered by large-diameter TBMs when starting and arriving at deep, water-rich, soft soil strata, reducing construction risks, and ensuring construction safety.

[0005] To achieve the above objectives, the present invention provides a steel sleeve reinforcement device suitable for large-diameter shield tunnels, comprising a steel sleeve, a steel wire rope, and a tightening device. The steel wire rope is circumferentially wound around the outer wall of the steel sleeve, with one end of the steel wire rope fixedly installed and the other end connected to the tightening device. The tightening device tightens the steel wire rope, so that the steel wire rope is tightly bound to the steel sleeve.

[0006] As a further improvement of this utility model, it also includes a first strain gauge, a second strain gauge, a displacement camera monitoring prism, and a monitoring control cabinet. The first strain gauge is installed on the wire rope to monitor the stress of the wire rope. The second strain gauge and the displacement camera monitoring prism are installed on the steel sleeve to monitor the stress and displacement of the steel sleeve, respectively. The first strain gauge, the second strain gauge, and the displacement camera monitoring prism are electrically connected to the monitoring control cabinet, which is electrically connected to the tightening device to control the start and stop of the tightening device based on the monitoring data.

[0007] As a further improvement of this utility model, the tightening device includes a servo drive motor and a ratchet disk. The ratchet disk is connected to the servo drive motor for transmission, and the wire rope is connected to the ratchet disk. The motor drives the ratchet disk to rotate to control the tightening of the wire rope.

[0008] As a further improvement of this utility model, the bottom left and right sides of the steel sleeve are respectively provided with connecting holes, one end of the steel wire rope is fixed on the connecting hole on one side, and the other end passes through the connecting hole on the other side and is connected to the tightening device.

[0009] As a further improvement of this utility model, multiple steel wire ropes are provided, and the multiple steel wire ropes are spaced apart along the length direction of the steel sleeve, with each steel wire rope corresponding to a tightening device.

[0010] As a further improvement of this utility model, a pressure relief pipe is provided on the steel sleeve, and a manual gate valve for controlling the opening and closing of the pressure relief pipe is provided on the pressure relief pipe.

[0011] As a further improvement of this utility model, the steel sleeve is provided with a pressure relief pipe, and also includes a monitoring pipe, a connecting node pressure gauge, a valve control device, and a pneumatic gate valve. The monitoring pipe is connected to the pressure relief pipe, the connecting node pressure gauge is installed on the monitoring pipe and electrically connected to the valve control device, the valve control device is connected to the pneumatic gate valve, and the pneumatic gate valve is installed on the pressure relief pipe for controlling the opening and closing of the pressure relief pipe according to the value of the connecting node pressure gauge.

[0012] As a further improvement of this utility model, the valve control device includes a relay, an air compressor, and a pneumatic directional valve. The relay is electrically connected to the pressure gauge at the connecting node and the air compressor, respectively. The air compressor is connected to the pneumatic directional valve, and the pneumatic directional valve is connected to the pneumatic gate valve.

[0013] As a further improvement of this utility model, the steel sleeve is composed of multiple blocks, and adjacent blocks are connected together by double-nut screws.

[0014] As a further improvement of this utility model, there is a segment joint between adjacent sections of the steel sleeve, and a U-shaped steel plate clamp is welded and fixed at the segment joint.

[0015] The beneficial effects of this utility model are as follows: by circumferentially winding the wire rope around the outer wall of the steel sleeve, a circumferential constraint is formed, which significantly improves the circumferential stiffness of the sleeve. When the wire rope is tightened, it can apply inward pressure to the steel sleeve. After the tunnel boring machine establishes pressure inside the chamber, the inward pressure of the wire rope can offset part of the pressure inside the chamber, preventing the steel sleeve from bursting or buckling. This solves the technical difficulties of large-diameter tunnel boring machines when starting and arriving in deep water-rich soft soil strata, prevents water and sand inrush accidents, reduces construction risks, and ensures construction safety. At the same time, the tightening device can dynamically adjust the tightening force of the wire rope, which can adapt to load changes under different geological conditions and ensure long-term structural stability. Attached Figure Description

[0016] Figure 1 This is a front view of the steel sleeve reinforcement device;

[0017] Figure 2 This is a side view of the steel sleeve reinforcement device;

[0018] Figure 3 This is a schematic diagram of the pressure relief system.

[0019] Figure 4 This is a schematic diagram of the double-nut screw and U-shaped steel plate clamp structure;

[0020] Marking descriptions: 1. Steel sleeve, 11. Connecting hole, 12. Steel wire rope, 2. Tightening device, 3. Servo drive motor, 31. Ratchet disc, 32. Monitoring and control cabinet, 4. First strain gauge, 41. Second strain gauge, 42. Displacement camera monitoring prism, 43. Pressure relief pipeline, 5. Manual gate valve, 51. Monitoring pipeline, 52. Connecting node pressure gauge, 53. Valve control device, 54. Relay, 541. Air compressor, 542. Pneumatic reversing valve, 543. Pneumatic gate valve, 55. Double nut screw, 6. U-shaped steel plate clamp, 7. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0022] like Figure 1-4 As shown, a steel sleeve reinforcement device suitable for large-diameter shield tunnels includes a steel sleeve 1, a steel wire rope 2, and a tightening device 3.

[0023] The steel sleeve 1 is a cylindrical structure composed of multiple sections, with a preferred diameter of 12-16m, suitable for large-diameter shield tunneling.

[0024] The wire rope 2 is made of high-strength prestressed steel strand, and multiple wire ropes 2 are arranged at intervals along the length of the steel sleeve 1. Each wire rope 2 is wound circumferentially around the outer wall of the steel sleeve 1. One end of the wire rope 2 is locked to the connecting hole 11 on the bottom left side of the steel sleeve 1 by a buckle, and the other end passes through the connecting hole 12 on the bottom right side of the steel sleeve 1 and is then manually tightened, and connected to the tightening device 3. Each wire rope 2 is connected to one tightening device 3.

[0025] The tightening device 3 includes a servo drive motor 31 and a ratchet disc 32. The shaft of the servo drive motor 31 is connected to the ratchet disc 32. After the wire rope 2 is wound around the ratchet disc 32 at least twice, it is locked with a buckle to securely connect the wire rope 2 to the ratchet disc 32. The ratchet disc 32 is equipped with a self-locking mechanism to prevent the wire rope 2 from loosening. By controlling the rotation of the servo drive motor 31, the wire rope 2 can be tightened, making it tightly bound to the steel sleeve 1. The wire rope 2 significantly improves the circumferential stiffness of the cylinder and applies inward pressure to the steel sleeve 1 to offset part of the pressure inside the tunnel boring machine chamber, thereby preventing the steel sleeve 1 from bursting or buckling, preventing water and sand inrush accidents, reducing construction risks, and ensuring construction safety. The tightening device 3 can dynamically adjust the tightening force of the wire rope 2, adapting to load changes under different geological conditions and ensuring long-term structural stability.

[0026] Based on the above, the reinforcement device is also equipped with an intelligent monitoring system. The intelligent monitoring system includes a monitoring control cabinet 4, a first strain gauge 41, a second strain gauge 42, and a displacement camera monitoring prism 43.

[0027] The first strain gauge 41 is installed on the wire rope 2 to monitor the stress of the wire rope 2 in real time. The second strain gauge 42 is installed at each segment and joint of the steel sleeve 1 to monitor the stress of the steel sleeve 1. Both the first strain gauge 41 and the second strain gauge 42 are YBJ-AB type vibrating wire strain gauges, which are fixed to each segment and joint of the steel sleeve 1 by welding clamps and rods.

[0028] The displacement camera monitoring prism 43 is welded and fixed to each segment and segment joint of the steel sleeve 1 through prism rods. It works with the displacement camera to realize displacement monitoring, collect the initial image values ​​of the monitoring points, and determine the distance from the camera to each monitoring point. During the project implementation, the image pixels of the monitoring points are collected in real time. Based on the changes in image pixels, the displacement change is calculated to reflect the displacement of each segment of the steel sleeve 1.

[0029] The first strain gauge 41, the second strain gauge 42, and the displacement camera monitoring prism 43 are electrically connected to the monitoring control cabinet 4. The monitoring control cabinet 4 is used to receive the above monitoring data. The monitoring control cabinet 4 has a PLC control system with preset safety values. When the monitoring data exceeds the preset safety values, the tightening device 3 of the monitoring control cabinet 4 is automatically activated to tighten the wire rope 2, so as to enable timely and effective intelligent automatic adjustment of the wire rope 2 and ensure the safety of the steel sleeve 1.

[0030] Furthermore, the reinforcement device is also equipped with a manual pressure relief system and an intelligent pressure relief system. A pressure relief pipe 5 is installed on the steel sleeve 1, and a manual gate valve 51 is installed on the pressure relief pipe 5 to control its opening and closing. The manual gate valve 51 can be manually opened to release pressure through the pressure relief pipe 5, thereby releasing the internal pressure of the steel sleeve 1 and preventing it from bursting due to excessive pressure. It also includes a monitoring pipe 52, a connecting node pressure gauge 53, a valve control device 54, and a pneumatic gate valve 55. The monitoring pipe 52 is connected to the pressure relief pipe 5, and the connecting node pressure gauge 53 is installed on the monitoring pipe 52 and electrically connected to the valve control device 54. The valve control device 54 is connected to the pneumatic gate valve 55, which is installed on the pressure relief pipe 5. When the pressure gauge detects that the pressure exceeds the set value, the valve control device 54 will automatically control the pneumatic gate valve 55 to open, releasing pressure through the pressure relief pipe 5. After the pressure decreases, it will automatically close, achieving intelligent pressure control. Pressure is controlled to prevent the steel sleeve 1 from cracking due to excessive pressure.

[0031] Specifically, the valve control device 54 includes a relay 541, an air compressor 542, and a pneumatic directional valve 543. The relay 541 is electrically connected to the connecting node pressure gauge 53 and the air compressor 542. The air outlet pipe of the air compressor 542 is connected to the pneumatic directional valve 543, and the pneumatic directional valve 543 is connected to the valve inlet pipe of the pneumatic gate valve 55. When the pressure value of the connecting node pressure gauge 53 reaches the pressure relief value, the connecting node pressure gauge 53 sends a signal to the relay 541. Then, the relay 541 sends an electrical signal to control the air compressor 542. The air compressor 542 generates gas that passes through the pneumatic directional valve 543 to the pneumatic gate valve 55, and the pneumatic gate valve 55 is opened by the pneumatic directional valve 543, thereby releasing the internal pressure of the steel sleeve 1.

[0032] To further enhance the structural strength of the steel sleeve 1, double-nut bolts 6 are connected between adjacent sections of the steel sleeve 1. The double-nut bolts 6 prevent the nuts from loosening due to vibration. U-shaped steel plate clamps 7 are welded and fixed at the joints of the sections to enhance the tightness between them. All of the above structures further prevent the connections between the sections from loosening when the steel sleeve 1 is subjected to changes in force, and further prevent water and sand leakage.

[0033] The above-described embodiments are merely illustrative of this utility model. Any equivalent embodiments made by those skilled in the art without departing from the technical features disclosed in this utility model, and without departing from the technical features of this utility model, shall still fall within the scope of the technical features of this utility model.

Claims

1. A steel sleeve reinforcement device suitable for large-diameter tunnel boring machines, comprising a steel sleeve, characterized in that: It also includes a wire rope and a tightening device. The wire rope is circumferentially wound around the outer wall of the steel sleeve, with one end of the wire rope fixed and the other end connected to the tightening device. The tightening device tightens the wire rope so that it is tightly bound to the steel sleeve.

2. The steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 1, characterized in that: It also includes a first strain gauge, a second strain gauge, a displacement camera monitoring prism, and a monitoring control cabinet. The first strain gauge is installed on the wire rope to monitor the stress of the wire rope. The second strain gauge and the displacement camera monitoring prism are installed on the steel sleeve to monitor the stress and displacement of the steel sleeve, respectively. The first strain gauge, the second strain gauge, and the displacement camera monitoring prism are electrically connected to the monitoring control cabinet, which is electrically connected to the tightening device to control the start and stop of the tightening device based on the monitoring data.

3. The steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 1, characterized in that: The tightening device includes a servo drive motor and a ratchet disk. The ratchet disk is connected to the servo drive motor, and the wire rope is connected to the ratchet disk. The motor drives the ratchet disk to rotate to control the tightening of the wire rope.

4. The steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 1, characterized in that: The bottom left and right sides of the steel sleeve are respectively provided with connection holes. One end of the steel wire rope is fixed on the connection hole on one side, and the other end passes through the connection hole on the other side and is connected to the tightening device.

5. A steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 1, characterized in that: The steel wire rope is provided in multiple parts, which are spaced apart along the length of the steel sleeve, and each steel wire rope is connected to a tightening device.

6. A steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 1, characterized in that: The steel sleeve is equipped with a pressure relief pipe, and the pressure relief pipe is equipped with a manual gate valve for controlling the opening and closing of the pressure relief pipe.

7. A steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 1, characterized in that: The steel sleeve is equipped with a pressure relief pipe, and also includes a monitoring pipe, a connecting node pressure gauge, a valve control device, and a pneumatic gate valve. The monitoring pipe is connected to the pressure relief pipe, the connecting node pressure gauge is installed on the monitoring pipe and electrically connected to the valve control device, the valve control device is connected to the pneumatic gate valve, and the pneumatic gate valve is installed on the pressure relief pipe to control the opening and closing of the pressure relief pipe according to the value of the connecting node pressure gauge.

8. A steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 7, characterized in that: The valve control device includes a relay, an air compressor, and a pneumatic directional valve. The relay is electrically connected to the pressure gauge at the connecting node and the air compressor, respectively. The air compressor is connected to the pneumatic directional valve, and the pneumatic directional valve is connected to the pneumatic gate valve.

9. A steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 1, characterized in that: The steel sleeve is composed of multiple sections, and adjacent sections are connected together by double-nut screws.

10. A steel sleeve reinforcement device suitable for large-diameter shield tunnels according to claim 9, characterized in that: The steel sleeve has a joint between adjacent sections, and a U-shaped steel plate clamp is welded and fixed at the joint.

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