A mistake-proofing device and method for liaison channel pipe jacking construction

Abstract

The application discloses a wrong-positioning preventing device and method for the construction of a liaison channel top pipe, and the device comprises a first telescopic part arranged in a first groove of a top pipe machine at one end and rotationally connected with the top pipe machine, the other end of the first telescopic part is connected with a limiting assembly, a connecting block is sleeved on the first telescopic part and can extend out of the top pipe machine to a second groove in the liaison channel at one end, one end of the limiting assembly is arranged in the connecting block, and the other end of the limiting assembly can extend out of the connecting block to the second groove and limit the liaison channel; the method comprises sequentially connecting the top pipe machine, the liaison channel and a jack; the first telescopic part drives one end of the connecting block to enter the second groove in the liaison channel, one end of the limiting assembly extends out to the second groove and limits the liaison channel; the jack applies a jacking force and starts working; the application can effectively reduce the wrong-positioning amount between the liaison channel and the top pipe machine, reduce the deviation between the top pipe machine and the liaison channel, avoid the damage of the top pipe machine caused by self-rotation, and improve the safety of the construction of the liaison channel top pipe.

Description

Technical Field

[0001] This invention relates to the field of construction technology for connecting passages, and in particular to a device and method for preventing misalignment during pipe jacking construction of connecting passages. Background Technology

[0002] With the rapid development of my country's economy and the continuous increase in urban population density, urban road traffic is becoming increasingly congested. To alleviate urban traffic pressure, major cities are vigorously developing subway systems. Connecting tunnels are important ancillary facilities of subway tunnels, playing vital roles in fire protection, safe evacuation, and drainage. Currently, connecting tunnels are generally constructed using the frozen mining method, which has disadvantages such as high excavation risks, large post-construction settlement, and long construction periods, seriously restricting the construction and development of subway rail transit. In recent years, with the improvement of mechanization, the pipe jacking method for connecting tunnel construction has emerged. It has advantages such as short construction period, good tunnel structure quality, safe and controllable working environment, and minimal impact on the surrounding environment, and has broad application prospects.

[0003] The following shortcomings exist when using a pipe jacking machine to excavate connecting passages:

[0004] 1. When excavating with the cutterhead positioned in front, no measures are taken between the pipe jacking machine and the connecting passage, and they are only in face-to-face contact. During the construction of the connecting passage pipe jacking method, when the excavation movement of the cutterhead causes vibration, the pipe jacking machine deviates from the design axis of pipe jacking. The pipe jacking machine will inevitably have to correct its deviation, thus affecting the construction of the connecting passage.

[0005] 2. The pipe jacking machine itself has a large self-weight. If the soil around the pipe jacking machine has low strength, the pipe jacking machine is prone to head collapse, which will result in a large misalignment between the tail of the pipe jacking machine and the connecting channel segments.

[0006] 3. When the pipe jacking machine is rotating to excavate the soil in front, if the surrounding soil cannot provide sufficient friction for the pipe jacking machine, the machine may spin, which may cause the tail of the pipe jacking machine to misalign with the connecting tunnel segments. This not only deviates significantly from the design axis of the pipe jacking excavation, but may also cause engineering accidents such as water spraying and sand inrush in the connecting tunnel, making it impossible to complete the pipe jacking reception construction, seriously affecting construction safety, reducing construction efficiency, and causing significant economic losses.

[0007] Based on the existing problems in the construction of the connecting tunnel, in order to prevent the pipe jacking machine and the tunnel segments from misaligning during the pipe jacking construction process, avoid the pipe jacking excavation from deviating from the design axis, reduce construction risks, and ensure the safe reception of the pipe jacking in the connecting tunnel, it is necessary to install a misalignment prevention connection device between the pipe jacking machine and the tunnel segments to solve the above-mentioned engineering problems. Summary of the Invention

[0008] The purpose of this invention is to provide a device and method for preventing misalignment during pipe jacking construction of connecting passages, which solves the problems of misalignment between the pipe jacking machine and the pipe segments, deviation of the pipe jacking excavation from the design axis, and misalignment of the pipe jacking machine head caused by the existing technology during pipe jacking construction of connecting passages.

[0009] This invention is implemented as follows: an anti-misalignment device for pipe jacking construction of a connecting passage, used to connect the connecting passage and the pipe jacking machine. The anti-misalignment device includes a first telescopic member, a connecting block, and a limiting component. One end of the first telescopic member is placed in a first groove on the pipe jacking machine and is rotatably connected to the pipe jacking machine. The other end of the first telescopic member is connected to the limiting component. The connecting block is sleeved on the first telescopic member, and one end can extend from the pipe jacking machine into a second groove in the connecting passage. One end of the limiting component is placed in the connecting block, and the other end can extend from the connecting block into the second groove to limit the connection passage.

[0010] In this invention, a connecting block is fitted onto the telescopic end of a first telescopic member. The first telescopic member drives the connecting block to move, so that one end of the connecting block is placed inside the pipe jacking machine, and the other end is placed inside the connecting channel and limited in the direction of rotation of the connecting channel, thus completing the connection between the pipe jacking machine and the connecting channel. A jack is provided at the end of the connecting channel away from the pipe jacking machine. Under the action of the jack and the pipe jacking machine, the connecting channel is used for pipe jacking construction. During the excavation process of the cutterhead on the pipe jacking machine, because one end of the connecting block is connected to the pipe jacking machine and the other end is limited in the connecting channel, the present invention can effectively prevent misalignment between the pipe jacking machine and the connecting channel. The connecting block can effectively reduce the misalignment between the connecting channel and the pipe jacking machine, reduce the deviation between the pipe jacking machine and the connecting channel, and improve the safety of pipe jacking construction in the connecting channel. Moreover, one end of the connecting block is rotatably connected to the pipe jacking machine through the first telescopic member, which can effectively prevent damage to the pipe jacking machine itself caused by its own rotation.

[0011] A further technical solution of the present invention is: the limiting component includes a motor, a gear, a sliding rack and a limiting block, one end of the sliding rack meshes with the gear and the other end is connected to the limiting block, the gear is sleeved on the output end of the motor to drive the limiting block to extend out of the connecting block and abut against the communication channel.

[0012] The motor is connected to the telescopic end of the first telescopic component. The motor drives the gear to rotate, which causes the sliding rack meshing with the gear to move outward until it comes into contact with the connecting channel. This device connects the pipe jacking machine and the connecting channel, thus effectively preventing misalignment between the pipe jacking machine and the connecting channel.

[0013] A further technical solution of the present invention is: the sliding rack is provided with a pin hole, the connecting block is provided with a telescopic pin that cooperates with the pin hole, one end of the telescopic pin that cooperates with the pin hole is provided with a laser emitter, and the pin hole is provided with a laser receiver.

[0014] After the limit block moves into position, the telescopic pin is positioned above a set of pin holes. Through the sensing of the laser emitter and laser receiver, the telescopic pin is driven to move into the pin holes, thus fixing the position of the sliding rack. The telescopic pin entering the pin holes plays a role in precise positioning, thereby locking the communication channel.

[0015] A further technical solution of the present invention is: a torque sensor is provided on the side of the limiting block that abuts against the communication channel.

[0016] Torque sensors can detect the torque on the connecting passage during the excavation process of the pipe jacking machine in real time, thereby controlling the rotation speed of the pipe jacking machine's cutterhead to ensure the safe excavation of the pipe jacking machine.

[0017] A further technical solution of the present invention is: an elastic positioning component is provided in the first groove, and the elastic positioning component is separable from the outer periphery of the connecting block.

[0018] When correction is needed, the elastic positioning component separates from the connecting block, providing sufficient rotation space for the connecting block within the pipe jacking machine. Since the connecting block and the connecting channel are on a set axis, the pipe jacking machine is gradually corrected under the action of the connecting block. When the first telescopic component drives the connecting block to move, the elastic positioning component separates from the connecting block, reducing the resistance to the connecting block's movement.

[0019] During normal tunneling operations, the elastic positioning component comes into contact with the connecting block, improving the stability of the structure.

[0020] A further technical solution of the present invention is: the elastic positioning component includes a positioning plate and a spring connecting the positioning plate and the pipe jacking machine.

[0021] A further technical solution of the present invention is: a second telescopic member is also provided in the first groove, and the telescopic end of the second telescopic member is electromagnetically connected to the positioning plate so that the connecting block and the positioning plate can be separated.

[0022] A further technical solution of the present invention is: the side of the connecting block away from the first telescopic member abuts against the second groove and is provided with an axial force sensor.

[0023] The axial force sensor is used to detect the jacking force F1 between the connecting block and the connecting channel. By the difference between the total thrust F2 of the jack and the jacking force F1 of the pipe jacking machine, the frictional resistance between the connecting channel and the stratum can be calculated. When the frictional resistance between the connecting channel and the stratum is too large, a friction-reducing agent is injected behind the wall of the connecting channel in time to reduce the frictional resistance behind the wall of the connecting channel, thereby reducing the total thrust of the jack and ensuring the safety of the structure.

[0024] This invention also provides a method for preventing misalignment during pipe jacking construction of connecting passages, the method comprising the following steps:

[0025] Step 1: Connect the pipe jacking machine, the connecting channel, and the jack in sequence, with the first groove on the pipe jacking machine corresponding to the second groove on the connecting channel;

[0026] Step 2: The first telescopic component in the first groove drives one end of the connecting block to extend out of the pipe jacking machine and enter the second groove of the connecting channel. One end of the limiting component extends from the connecting block into the second groove and limits the connection channel.

[0027] Step 3: Apply jacking force with jacks, and the pipe jacking machine begins normal excavation work.

[0028] A further technical solution of the present invention is as follows: In step three, if the pipe jacking machine deviates from the predetermined tunneling axis during the construction process and correction is required, the positioning block on the outer periphery of the connecting block is separated from the connecting block to provide rotation space for the pin block inside the pipe jacking machine. After the correction is completed, the positioning block and the connecting block abut against each other to limit the position of the connecting block, and the pipe jacking machine continues to start normal excavation work.

[0029] The beneficial effects of this invention are as follows: The connecting block of this invention is sleeved on the telescopic end of the first telescopic member. The first telescopic member drives the connecting block to move, so that one end of the connecting block is placed inside the pipe jacking machine, and the other end is placed inside the connecting channel and limited in the rotation direction of the connecting channel, thus completing the connection between the pipe jacking machine and the connecting channel. A jack is provided at the end of the connecting channel away from the pipe jacking machine. Under the action of the jack and the pipe jacking machine, the connecting channel is used for pipe jacking construction. During the pipe jacking process, because one end of the connecting block is connected to the pipe jacking machine and the other end is limited in the connecting channel, the invention can effectively prevent misalignment between the pipe jacking machine and the connecting channel. The connecting block can effectively reduce the misalignment between the connecting channel and the pipe jacking machine, reduce the deviation between the pipe jacking machine and the connecting channel, and improve the safety of pipe jacking construction in the connecting channel. Moreover, one end of the connecting block is rotatably connected to the pipe jacking machine through the first telescopic member, which can effectively prevent damage to the pipe jacking machine itself caused by its own rotation. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the jack, the connecting channel, and the pipe jacking machine provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the jack, the connecting channel, and the pipe jacking machine provided by the present invention;

[0032] Figure 3 This is an enlarged view of point K provided by the present invention;

[0033] Figure 4 This is a schematic diagram of the connection between the limiting component and the first telescopic member provided by the present invention;

[0034] Figure 5This is a schematic diagram of the anti-misalignment device provided by the present invention, which is completely inside the pipe jacking machine;

[0035] Figure 6 This is a schematic diagram of the internal structure of the anti-misalignment device provided by the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the anti-misalignment device provided by the present invention, with one end extending into the second groove;

[0037] Figure 8 This is a schematic diagram of the anti-misalignment device provided by the present invention placed inside the pipe jacking machine.

[0038] Reference numerals: 0. Anti-misalignment device; 1. First telescopic component; 2. Pipe jacking machine; 3. Connecting passage; 4. Jack; 5. Spring; 6. Electromagnet; 7. Second telescopic component; 8. Rubber pad; 9. Positioning plate; 10. Connecting block; 11. Axial force sensor; 12. Gear; 13. Sliding rack; 14. Telescopic pin; 15. Limiting block; 16. Pin hole; 17. Ball bearing; 18. Torque sensor. Detailed Implementation

[0039] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0041] Example 1:

[0042] Figure 1-8An anti-misalignment device for pipe jacking construction of a connecting passage is shown, used to connect the connecting passage 3 and the pipe jacking machine 2. The anti-misalignment device includes a first telescopic member 1, a connecting block 10, and a limiting component. One end of the first telescopic member 1 is placed in a first groove on the pipe jacking machine 2 and is rotatably connected to the pipe jacking machine 2. The other end of the first telescopic member 1 is connected to the limiting component. The connecting block 10 is sleeved on the first telescopic member 1, and one end can extend from the pipe jacking machine 2 into a second groove in the connecting passage 3. One end of the limiting component is placed in the connecting block 10, and the other end can extend from the connecting block 10 into the second groove to limit the connection to the connecting passage 3.

[0043] In this invention, a connecting block is fitted onto the telescopic end of a first telescopic member. The first telescopic member drives the connecting block to move, so that one end of the connecting block is placed inside the pipe jacking machine, and the other end is placed inside the connecting channel and limited in the direction of rotation of the connecting channel, thus completing the connection between the pipe jacking machine and the connecting channel. A jack is provided at the end of the connecting channel away from the pipe jacking machine. Under the action of the jack and the pipe jacking machine, the connecting channel is used for pipe jacking construction. During the excavation process of the cutterhead on the pipe jacking machine, because one end of the connecting block is connected to the pipe jacking machine and the other end is limited in the connecting channel, the present invention can effectively prevent misalignment between the pipe jacking machine and the connecting channel. The connecting block can effectively reduce the misalignment between the connecting channel and the pipe jacking machine, reduce the deviation between the pipe jacking machine and the connecting channel, and improve the safety of pipe jacking construction in the connecting channel. Moreover, one end of the connecting block is rotatably connected to the pipe jacking machine through the first telescopic member, which can effectively prevent damage to the pipe jacking machine itself caused by its own rotation.

[0044] In this embodiment, an elastic layer 8 is provided on the contact surface between the connecting block 10 and the elastic positioning component. To mitigate the vibration of the pipe jacking machine caused by the cutterhead, the elastic layer absorbs the vibration, reducing its transmission to the connecting passage and further minimizing misalignment during construction. This provides a certain degree of buffering and protection for the connection points.

[0045] In this embodiment, the end of the first telescopic member 1 that is rotatably connected to the pipe jacking machine is shaped like an "Ω". The embedding depth is limited to the point where the first telescopic member 1 does not separate from the pipe jacking machine 2. When the pipe jacking machine 2 changes direction and corrects its course, the first telescopic member 1 can rotate inside the pipe jacking machine 2, so that the first telescopic member 1 is only subjected to tension and compression.

[0046] In this embodiment, the first groove is evenly arranged around the pipe jacking machine, and six grooves are also evenly arranged on the connecting channel 3 that is in contact with the pipe jacking machine 2. A rectangular hole is provided on the side wall of the second groove of the connecting channel 3 for placing the limiting block 15 on the sliding rack 13.

[0047] In this embodiment, the limiting component includes a motor, a gear 12, a sliding rack 13, and a limiting block 15. One end of the sliding rack 13 meshes with the gear 12, and the other end is connected to the limiting block 15. The gear 12 is sleeved on the output end of the motor to drive the limiting block 15 to extend out of the connecting block 10 and abut against the communication channel 3.

[0048] The motor is connected to the telescopic end of the first telescopic component. The motor drives the gear to rotate, which causes the sliding rack meshing with the gear to move outward until it comes into contact with the connecting channel. This device connects the pipe jacking machine and the connecting channel, thus effectively preventing misalignment between the pipe jacking machine and the connecting channel.

[0049] In this embodiment, the telescopic end of the first telescopic member 1 is fixed with a gear 12 by a motor. The rotation speed of the gear 12 can be adjusted and it can rotate in both directions, providing the power for the sliding rack 13 to move. In this embodiment, when the gear 12 rotates in the forward direction, the sliding rack 13 extends outward and moves. When the gear 12 rotates in the reverse direction, the sliding rack 13 retracts inward and moves back into the connecting block.

[0050] In this embodiment, the sliding rack 13 is provided with a pin hole 16, the connecting block 10 is provided with a telescopic pin 14 that cooperates with the pin hole 16, one end of the telescopic pin 14 that cooperates with the pin hole 16 is provided with a laser emitter, and the pin hole 16 is provided with a laser receiver.

[0051] After the limit block moves into position, the telescopic pin is positioned above a set of pin holes. Through the sensing of the laser emitter and laser receiver, the telescopic pin is driven to move into the pin holes, thus fixing the position of the sliding rack. The telescopic pin entering the pin holes plays a role in precise positioning, thereby locking the communication channel.

[0052] In this embodiment, two sets of vertical pin holes 16 are provided near the protrusion of the sliding rack 13. Each set includes three evenly distributed vertical pin holes 16. The telescopic pin 14 extends into the pin holes 16 to lock the sliding rack 13 and fix the sliding rack 13.

[0053] In this embodiment, a torque sensor 18 is provided on the side of the limiting block 15 that abuts against the communication channel 3.

[0054] Torque sensors can detect the torque on the connecting passage during the excavation process of the pipe jacking machine in real time, thereby controlling the rotation speed of the pipe jacking machine's cutterhead to ensure the safe excavation of the pipe jacking machine.

[0055] In this embodiment, the outer side of the sliding rack is provided with ball bearings 17, and the connecting block is provided with a groove that is slidably connected to the ball bearings, so as to reduce the frictional resistance of the sliding gear in the connecting block.

[0056] In this embodiment, the sliding rack comprises two racks arranged vertically, resulting in higher stability.

[0057] In this embodiment, an elastic positioning component is provided in the first groove, and the elastic positioning component is separable from the outer periphery of the connecting block 10.

[0058] When correction is needed, the elastic positioning component separates from the connecting block, providing sufficient rotation space for the connecting block within the pipe jacking machine. Since the connecting block and the connecting channel are on a set axis, the pipe jacking machine is gradually corrected under the action of the connecting block. When the first telescopic component drives the connecting block to move, the elastic positioning component separates from the connecting block, reducing the resistance to the connecting block's movement.

[0059] During normal tunneling operations, the elastic positioning component comes into contact with the connecting block, improving the stability of the structure.

[0060] In this embodiment, the elastic positioning component includes a positioning plate 9 and a spring 5 connecting the positioning plate 9 and the pipe jacking machine 2.

[0061] In this embodiment, the four corners of the positioning plate are connected to the pipe jacking machine via springs to ensure that the positioning plate is stably and securely attached to the pin blocks. The springs are retractable, providing the pipe jacking machine with a maneuverable space for correction.

[0062] In this embodiment, a second telescopic member 7 is also provided in the first groove. The telescopic end of the second telescopic member 7 is electromagnetically connected to the positioning plate 9 so that the connecting block 10 and the positioning plate 9 can be separated.

[0063] In this embodiment, the telescopic end of the second telescopic member contacts the middle part of the positioning plate, providing support for the connecting block and keeping the anti-misalignment device stable.

[0064] In this embodiment, the telescopic end of the first telescopic member is provided with an electromagnet, and the positioning plate is provided with a metal block that magnetically cooperates with the electromagnet. When the electromagnet is energized, the first telescopic member attracts the positioning plate, the spring is compressed, and the positioning plate is separated from the connecting block; otherwise, the positioning plate and the connecting block come into contact under the action of the spring.

[0065] In this embodiment, the side of the connecting block 10 away from the first telescopic member 1 is in contact with the second groove and is provided with an axial force sensor 11.

[0066] The axial force sensor is used to detect the jacking force F1 between the connecting block and the connecting channel. By the difference between the total thrust F2 of the jack 4 and the jacking force F1 experienced by the pipe jacking machine, the frictional resistance between the connecting channel and the stratum can be calculated. When the frictional resistance between the connecting channel and the stratum is too large, a friction-reducing agent is injected behind the wall of the connecting channel in time to reduce the frictional resistance behind the wall of the connecting channel, thereby reducing the total thrust of the jack 4 and ensuring the safety of the structure.

[0067] In this embodiment, the connecting block is an arc-shaped block structure.

[0068] In this embodiment, there are eight jacks 4, arranged symmetrically on the left and right. The total thrust of the jacks 4 is F2, which provides the required jacking force for the pipe jacking construction of the connecting passage.

[0069] In this embodiment, the connecting block 10 is provided with a circular channel of the first telescopic member 1, a cylindrical groove of the gear 12, a rectangular channel of the sliding rack 13, and circular grooves of three evenly distributed telescopic pins 14. A rectangular groove is provided on each side of the connecting block 10. The rectangular groove intersects with the sliding channel of the sliding rack 13, providing space for the internal structure to move.

[0070] In this embodiment, the first telescopic member is coaxial with the gear.

[0071] The working principle of this invention: When using this invention, firstly, according to Figure 1-8 As shown, the self-locking function of the connecting block enables a tight connection between the pipe jacking machine 2 and the connecting channel 3, preventing misalignment. The movable positioning plate 9 increases the correction space for the pipe jacking machine 2's steering. A rubber pad with a torque sensor 18 is attached to the front end of the positioning hole 15 to monitor the torque exerted on the connecting channel 3 by the pipe jacking machine 2 during excavation, thereby controlling the rotational speed of the cutterhead at the front end of the pipe jacking machine 2 to ensure safe excavation. A rubber pad with an axial force sensor 11 is attached to the front end of the pin block 10 to monitor the jacking force F1 between the connecting block 10 and the connecting channel 3. The difference between the total thrust F2 of the jack 4 and the jacking force F1 experienced by the pipe jacking machine 2 can be used to calculate the frictional resistance between the connecting channel 3 and the ground. When the frictional resistance between the connecting channel 3 and the ground is too high, a friction-reducing agent is injected behind the wall of the connecting channel 3 to reduce the frictional resistance behind the wall of the connecting channel 3, thereby reducing the total thrust of the jack 4 and ensuring structural safety.

[0072] Example 2:

[0073] A method for preventing misalignment during pipe jacking construction of connecting passages, the method comprising the following steps:

[0074] Step 1: Connect the pipe jacking machine, the connecting channel, and the jack in sequence, with the first groove on the pipe jacking machine corresponding to the second groove on the connecting channel;

[0075] Step 2: The first telescopic component in the first groove drives one end of the connecting block to extend out of the pipe jacking machine and enter the second groove of the connecting channel. One end of the limiting component extends from the connecting block into the second groove and limits the connection channel.

[0076] Step 3: Apply jacking force with jacks, and the pipe jacking machine begins normal excavation work.

[0077] In this embodiment, in step three, if the pipe jacking machine deviates from the predetermined tunneling axis during the construction process and needs to be corrected, the positioning block on the outer periphery of the connecting block is separated from the connecting block to provide rotation space for the pin block inside the pipe jacking machine. After the correction is completed, the positioning block and the connecting block come into contact to limit the position of the connecting block, and the pipe jacking machine continues to start normal excavation work.

[0078] In step two, the electromagnet 6 inside the second telescopic member 7 is energized, causing the second telescopic member 7 to attract the positioning plate 9 and retract a certain distance, so as to reduce the lateral friction resistance generated by the positioning plate 9 on the movement of the connecting block 10; the first telescopic member 1 extends, so that one end of the connecting block 10 enters the second groove of the connecting channel 3. When the axial force detected by the axial force sensor 11 at the front end of the connecting block 10 reaches the predetermined value, the first telescopic member 1 stops working. At this time, part of the connecting block 10 is in the connecting channel 3, and the other part is in the first groove at the tail of the pipe jacking machine 2.

[0079] In this embodiment, step two includes retracting the three telescopic pins 14 on the sliding rack 13, and the gear 12 at the front end of the first telescopic member 1 slowly rotating in the forward direction, driving the upper and lower sliding rack 13 to extend from the side walls of the connecting block 10. At the same time, the laser emitting device on the telescopic pin 14 and the laser receiving device at the bottom of a set of pin holes 16 on the sliding rack 13 are opened. At this time, the limiting block 15 at the front end of the sliding rack 13 enters the side wall of the second groove of the communication channel 3.

[0080] In this embodiment, step two includes the following steps: when the torque sensor 18 on the limiting block 15 detects the torque, the gear 12 automatically reduces its rotation speed until the laser receiving devices in the other set of pin holes 16 all receive the laser emitted by the laser emitting device. At this time, the gear 12 automatically stops rotating, and the telescopic pin 14 automatically extends into the other set of pin holes 16 of the sliding rack, locking the sliding rack 13 to prevent slippage during the pipe jacking construction process.

[0081] In this embodiment, step two includes extending the second telescopic member 7 so that the positioning plate 9 contacts the connecting block 10, maintaining the stability of the connecting block 10 within the tail of the pipe jacking machine 2, and then de-energizing the electromagnet 6 in the second telescopic member 7.

[0082] In this embodiment, the method for preventing misalignment further includes the following steps: Step 4: After the communication channel is received, the telescopic pin 14 on the sliding rack 13 retracts, the gear 12 at the front end of the first telescopic member 1 begins to slowly rotate in the opposite direction, and the limiting block 15 on the sliding rack 13 retracts from the side wall of the communication channel 3 into the two side walls of the connecting block 10.

[0083] In this embodiment, the anti-misalignment method further includes the following steps: Step 5: When the laser receiving devices in the first set of pin holes 16 all receive the laser emitted by the laser emitting device, the gear 12 automatically stops rotating in the reverse direction. At this time, the telescopic pin 14 automatically extends and enters the first set of pin holes 16 of the sliding rack 13, locking the sliding rack 13 and preventing it from sliding during the pipe jacking construction process.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A misalignment prevention device for pipe jacking construction of a connecting passage, used to connect the connecting passage (3) and the pipe jacking machine (2), characterized in that, The anti-misalignment device includes a first telescopic component (1), a connecting block (10), and a limiting component. One end of the first telescopic component (1) is placed in the first groove on the pipe jacking machine (2) and is rotatably connected to the pipe jacking machine (2). The other end of the first telescopic component (1) is connected to the limiting component. The connecting block (10) is sleeved on the first telescopic component (1) and one end can extend from the pipe jacking machine (2) to the second groove in the connecting channel (3). The first telescopic component (1) drives the connecting block (10) to move, so that one end of the connecting block (10) is placed in the pipe jacking machine (2) and the other end is placed in the connecting channel (3) and is limited in the rotation direction of the connecting channel (3), thus completing the connection between the pipe jacking machine (2) and the connecting channel (3). One end of the limiting component is placed in the connecting block (10) and the other end can extend from the connecting block (10) to the second groove to limit the connection with the connecting channel (3). The limiting component includes a motor, a gear (12), a sliding rack (13), and a limiting block (15). One end of the sliding rack (13) meshes with the gear (12), and the other end is connected to the limiting block (15). The gear (12) is sleeved on the output end of the motor to drive the limiting block (15) to extend out of the connecting block (10) and limit the rotation direction of the communication channel (3).

2. The anti-misalignment device for pipe jacking construction of a connecting passage according to claim 1, characterized in that, The sliding rack (13) is provided with a pin hole (16), and the connecting block (10) is provided with a telescopic pin (14) that cooperates with the pin hole (16). The end of the telescopic pin (14) that cooperates with the pin hole (16) is provided with a laser emitter, and the pin hole (16) is provided with a laser receiver.

3. The anti-misalignment device for pipe jacking construction of a connecting passage according to claim 2, characterized in that, A torque sensor (18) is provided on the side of the limiting block (15) that abuts against the communication channel (3).

4. A device for preventing misalignment during pipe jacking construction of a connecting passage according to any one of claims 1-3, characterized in that, The first groove is provided with an elastic positioning component, which can be separated from the outer periphery of the connecting block (10).

5. The anti-misalignment device for pipe jacking construction of a connecting passage according to claim 4, characterized in that, The elastic positioning component includes a positioning plate (9) and a spring (5) connecting the positioning plate (9) and the pipe jacking machine (2).

6. The anti-misalignment device for pipe jacking construction of a connecting passage according to claim 5, characterized in that, The first groove is also provided with a second telescopic member (7), and the telescopic end of the second telescopic member (7) is electromagnetically connected to the positioning plate (9) so that the connecting block (10) and the positioning plate (9) can be separated.

7. A device for preventing misalignment during pipe jacking construction of a connecting passage according to any one of claims 1-3, characterized in that, The side of the connecting block (10) away from the first telescopic member (1) is in contact with the second groove and is provided with an axial force sensor (11).

8. A method for preventing misalignment during pipe jacking construction of a connecting passage, characterized in that, The method is based on the anti-misalignment device according to any one of claims 1-7, and the method includes the following steps: Step 1: Connect the pipe jacking machine, the connecting channel, and the jack in sequence, with the first groove on the pipe jacking machine corresponding to the second groove on the connecting channel; Step 2: The first telescopic component in the first groove drives one end of the connecting block to extend out of the pipe jacking machine and enter the second groove of the connecting channel. One end of the limiting component extends from the connecting block into the second groove and limits the connection channel. Step 3: Apply jacking force with jacks, and the pipe jacking machine begins normal excavation work.

9. A method for preventing misalignment during pipe jacking construction of a connecting passage according to claim 8, characterized in that, In step three, if the pipe jacking machine deviates from the predetermined tunneling axis during the construction process and needs to be corrected, the positioning block on the outer periphery of the connecting block is separated from the connecting block to provide rotation space for the pin block inside the pipe jacking machine. After the correction is completed, the positioning block and the connecting block come into contact to limit the position of the connecting block, and the pipe jacking machine continues to start normal excavation work.

Images