Excitation polarization advanced detection electrode power supply device and method for TBM construction

Abstract

The application belongs to the field of geological advance prediction, and provides a power supply device and method for induced polarization advance detection electrode for TBM construction. The device comprises a movable arch, a movable track, a telescopic multi-degree-of-freedom drilling machine, an image acquisition device, a controller and a telescopic power supply electrode. The movable track is connected with a movable track driving assembly. The movable track driving assembly, the telescopic multi-degree-of-freedom drilling machine, the image acquisition device and the telescopic power supply electrode are all connected with the controller. The image acquisition device is used for acquiring the current drilling position image and transmitting the image to the controller. The controller is used for judging whether there is sundry according to the drilling position image, so as to control the movable track driving assembly to drive the movable track to move to the next drilling position until there is no sundry in the drilling position to which the movable track moves, and to control the telescopic multi-degree-of-freedom drilling machine to perform drilling action, while the telescopic power supply electrode is controlled to extend into the drilling hole. The device can improve the reliability and stability of detection.

Description

Technical Field

[0001] This invention belongs to the field of geological advance prediction, and in particular relates to a power supply device and method for an excitation polarization advance detection electrode used in TBM construction. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In practical applications, common induced polarization advance detection systems typically mount the measuring electrode M on the cutterhead, with reference electrodes B and N positioned at the tail of the TBM, approximately 150m from the cutterhead. The power supply electrode A is positioned in two main ways. The first method involves mounting several power supply electrodes on the TBM shield shell. Power supply electrode A is retractable; it extends during detection and retracts afterward. However, because the TBM shield shell is in direct contact with the tunnel wall, the retractable opening of power supply electrode A is prone to blockage by debris, leading to a high failure rate. Furthermore, the close proximity of power supply electrode A to the TBM shield shell, coupled with the pressure between the shield and the tunnel wall, can create a current loop, resulting in inaccurate detection results. The second method uses manual electrode rods. During detection, the operator holds the rod and inserts it into the appropriate position. This method relies entirely on manual detection. The space available for manual operation within the tunnel is limited, requiring a large number of rods that are inconvenient to carry. Detecting different locations necessitates climbing to a second-level platform, making it overall time-consuming and labor-intensive. Summary of the Invention

[0004] To address the technical problems mentioned above, this invention provides a power supply device and method for an excitation polarization advanced detection electrode used in TBM construction, which can improve the reliability and stability of detection.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The first aspect of the present invention provides a power supply device for an excitation polarization advance detection electrode for TBM construction.

[0007] A power supply device for an excitation polarization advanced detection electrode used in TBM construction includes: a movable arch frame, a movable track, a telescopic multi-degree-of-freedom drilling rig, an image acquisition device, a controller, and a telescopic power supply electrode.

[0008] The retractable multi-degree-of-freedom drilling rig, image acquisition device, controller, and retractable power supply electrode are all mounted on the movable arch frame. The movable arch frame matches the shape of the tunnel wall and is always in a non-contact state with the tunnel wall. The movable arch frame is mounted on the moving track, which is fixed to the second-level platform of the TBM. The moving track is connected to the moving track drive assembly, and the moving track drive assembly, the retractable multi-degree-of-freedom drilling rig, the image acquisition device, and the retractable power supply electrode are all connected to the controller.

[0009] The image acquisition device is used to acquire images of the current drilling position and transmit them to the controller; the controller is used to determine whether there are any obstacles based on the drilling position images, and to control the moving track drive assembly to drive the moving track to the next drilling position until there are no obstacles at the drilling position, and to control the telescopic multi-degree-of-freedom drilling machine to perform drilling operations, while controlling the telescopic power supply electrode to extend into the drilling hole.

[0010] In one embodiment, a force sensor is also provided at the end of the telescopic power supply electrode, which is connected to the controller; when the telescopic power supply electrode is inserted into the borehole and comes into contact with the tunnel wall, the force sensor is triggered to work; the force sensor is used to detect the pressure between the end of the telescopic power supply electrode and the tunnel wall and transmit it to the controller.

[0011] In one implementation, the controller is used to determine that the telescopic power supply electrode has reached the optimal coupling state when the pressure between the end of the telescopic power supply electrode and the tunnel wall reaches a set value; and to control the telescopic power supply electrode to retract after the detection is completed.

[0012] In one implementation, the moving track employs a ball screw drive.

[0013] In one embodiment, the telescopic multi-degree-of-freedom drilling rig includes a main drive motor assembly, a telescopic rod, a first drive electric cylinder, a second drive electric cylinder, and a drill bit assembly. Before drilling, the telescopic rod is extended under the action of the main drive motor assembly. Under the action of the first and second drive electric cylinders, the drill bit assembly is adjusted to the front of the telescopic power supply electrode to drill a hole, and the drill bit assembly is retracted after drilling is completed.

[0014] In one embodiment, the main drive motor assembly is mounted on a movable arch frame, the telescopic rod is fixed to the first slide rail via a telescopic rod mounting seat, and a first slider is provided on the first slide rail; a second slide rail is mounted on the first slider, and a second slider is provided on the second slide rail, and the drill bit assembly is mounted on the second slider; the first drive electric cylinder is used to drive the movement of the first slider, and the second drive electric cylinder is used to drive the movement of the second slider, so as to realize the movement of the drill bit assembly in three directions: horizontal, vertical, and vertical.

[0015] In one embodiment, the telescopic power supply electrode includes a motor assembly, a flange seat, an electric push rod, and a power supply electrode A. The motor assembly is connected to a controller and is mounted on a movable arch via the flange seat. The motor assembly is used to drive the electric push rod to extend or retract the power supply electrode A, and the extension length of the power supply electrode A is adjustable.

[0016] A second aspect of the present invention provides a method for supplying power to an excitation polarization advance detection electrode for TBM construction.

[0017] A detection method based on a power supply device for an excitation polarization advance detection electrode used in TBM construction includes:

[0018] The power supply device for the excitation polarization advanced detection electrode used in TBM construction is set between the TBM shield shell and the support boot.

[0019] During the exploration, the TBM is stopped from tunneling and several measuring electrodes M on the cutterhead are extended and coupled to the tunnel face; the movable arch frame is moved to the initial exploration position behind the TBM shield shell via a moving track;

[0020] The image acquisition device acquires the current drilling position image and transmits it to the controller. The controller determines whether there is any debris based on the drilling position image and controls the moving track drive assembly to drive the moving track to the next drilling position until there is no debris at the drilling position. The controller then controls the telescopic multi-degree-of-freedom drill to perform the drilling action, and at the same time controls the telescopic power supply electrode to extend into the drilling hole.

[0021] In one implementation, when the telescopic power supply electrode is inserted into the borehole and comes into contact with the tunnel wall, the force sensor is triggered to operate; the controller receives the pressure detected by the force sensor between the end of the telescopic power supply electrode and the tunnel wall; when the pressure between the end of the telescopic power supply electrode and the tunnel wall reaches a set value, the controller determines that the telescopic power supply electrode has reached the optimal coupling state.

[0022] In one implementation, the controller retracts the telescopic power supply electrode after the detection is completed.

[0023] The beneficial effects of this invention are:

[0024] (1) The present invention uses a controller to determine whether there are foreign objects based on the drilling position image, and controls the moving track drive assembly to drive the moving track to the next drilling position until there are no foreign objects at the drilling position. The retractable multi-degree-of-freedom drilling machine is controlled to perform drilling action, and the retractable power supply electrode is controlled to extend into the drilling hole. This realizes the fully automated power supply of the excitation polarization advanced detection electrode, eliminating the need for manual operation, greatly improving detection efficiency, ensuring personnel safety, and improving the working environment of the operators.

[0025] (2) Compared with the method of installing the power supply electrode on the TBM shield shell, the present invention leaves a gap between the power supply device system and the tunnel wall, the telescopic power supply electrode is not easy to be blocked or stuck, and will not form a circuit with the TBM body to affect the detection results, thus greatly improving the reliability and stability of the detection.

[0026] (3) The power supply electrode of the present invention is installed on the shell of the TBM shield. Its power supply position is fixed. The position of the power supply system can be preferred. It can eliminate the influence of steel bars, gravel and other materials on the detection results. The detection accuracy of the system is higher.

[0027] (4) The invention of the excitation polarization advanced detection electrode power supply device for TBM construction can be drilled to fully couple the power supply electrode with the tunnel wall, thereby improving the accuracy of detection; detection cycles can be set, making it easier to obtain more detection sample data.

[0028] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0030] Figure 1 This is a schematic diagram of the power supply system structure of the excitation polarization advance detection electrode according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the retractable multi-degree-of-freedom drilling rig structure according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the telescopic power supply electrode structure according to an embodiment of the present invention.

[0033] Among them, 11. cutterhead, 12. TBM shield shell, 13. TBM second-level platform, 14. support shoe, 2. movable arch frame, 3. moving rail, 31. drive assembly, 32. moving slide rail, 33. lead screw, 34. moving slider, 4. telescopic multi-degree-of-freedom drilling rig, 41. main drive motor assembly, 42. telescopic rod, 43. first slide rail, 44. first slider, 45. first drive electric cylinder, 46. second slide rail, 47. second slider, 48. second drive electric cylinder, 49. drill bit assembly, 5. image acquisition device, 6. controller, 7. telescopic power supply electrode, 71. motor assembly, 72. flange seat, 73. electric push rod, 74. force sensor, 75. power supply electrode A, 8. measuring electrode M. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0038] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0039] Figure 1 This is a schematic diagram of the power supply system structure of the excitation polarization lead detection electrode according to an embodiment of the present invention. Figure 1 As shown, this embodiment of the invention provides a power supply device for an excitation polarization advanced detection electrode for TBM construction, including: a movable arch frame 2, a movable track 3, a telescopic multi-degree-of-freedom drilling rig 4, an image acquisition device 5, a controller 6, and a telescopic power supply electrode 7.

[0040] The retractable multi-degree-of-freedom drilling rig 4, image acquisition device 5, controller 6, and retractable power supply electrode 7 are all mounted on the movable arch frame 2. The movable arch frame 2 matches the shape of the tunnel wall and is always in a non-contact state with the tunnel wall. The movable arch frame 2 is mounted on the moving track 3, which is fixed to the second-level platform of the TBM. The moving track 3 is connected to the moving track drive assembly, and the moving track drive assembly, the retractable multi-degree-of-freedom drilling rig 4, the image acquisition device 5, and the retractable power supply electrode 7 are all connected to the controller 6.

[0041] The image acquisition device 5 is used to acquire the current drilling position image and transmit it to the controller 6; the controller 6 is used to determine whether there is debris based on the drilling position image, and control the moving track drive assembly to drive the moving track 3 to move to the next drilling position until there is no debris at the drilling position, control the telescopic multi-degree-of-freedom drill 4 to perform drilling action, and at the same time control the telescopic power supply electrode 7 to extend into the drilling hole.

[0042] In this embodiment, the movable arch frame 2 is designed in an arch shape, corresponding to the shape of the tunnel wall, but not in contact with the tunnel wall. This shape occupies little space and reduces interference and impact on other equipment.

[0043] In this embodiment of the invention, the end of the telescopic power supply electrode 7 is also provided with a force sensor 74, which is connected to the controller 6; when the telescopic power supply electrode 7 extends into the borehole and comes into contact with the tunnel wall, the force sensor 74 is triggered to work; the force sensor 74 is used to detect the pressure between the end of the telescopic power supply electrode and the tunnel wall and transmit it to the controller 6.

[0044] The controller 6 is used to determine that the telescopic power supply electrode has reached the optimal coupling state when the pressure between the end of the telescopic power supply electrode and the tunnel wall reaches a set value; and to control the telescopic power supply electrode to retract after the detection is completed.

[0045] In one or more embodiments, to ensure the strength and displacement accuracy of the track, the moving track 3 employs a ball screw drive. The moving track 3 consists of a drive assembly 31, a moving slide rail 32, a lead screw 33, and a moving slider 34. The drive assembly 31 is connected to a controller 6; the moving slider 34 passes through the lead screw 33, and both ends of the lead screw 33 are fixed to the moving slide rail 32, allowing the moving slider 34 to move along the lead screw 33 and the slide rail 32; the controller 6 controls the drive assembly 31 to drive the moving slider 34 to move along the lead screw 33 and the slide rail 32.

[0046] like Figure 2As shown, the telescopic multi-degree-of-freedom drill 4 includes a main drive motor assembly 41, a telescopic rod 42, a first drive electric cylinder 45, a second drive electric cylinder 48, and a drill bit assembly 49. Before drilling, the telescopic rod 42 is extended under the action of the main drive motor assembly 41. Under the action of the first drive electric cylinder 45 and the second drive electric cylinder 48, the drill bit assembly 49 is adjusted to the front of the telescopic power supply electrode 7 to drill a hole, and the drill bit assembly 49 is retracted after drilling is completed.

[0047] Specifically, the main drive motor assembly 49 is mounted on the movable arch frame 2, the telescopic rod 42 is fixed to the first slide rail 43 via a telescopic rod mounting seat, and a first slider 44 is provided on the first slide rail 43; a second slide rail 46 is mounted on the first slider 44, and a second slider 47 is provided on the second slide rail 46, and the drill bit assembly 49 is mounted on the second slider 47; the first drive electric cylinder 45 is used to drive the movement of the first slider 43, and the second drive electric cylinder 48 is used to drive the movement of the second slider 47, so as to realize the movement of the drill bit assembly 49 in the three directions of horizontal, vertical and vertical.

[0048] To ensure the coupling between the power supply electrode A and the tunnel wall, before detection, the drilling assembly 49 extends through the telescopic rod 42 under the action of the main drive motor 41. Under the action of the first drive electric cylinder 45 and the second drive electric cylinder 48, the drill bit assembly 49 is adjusted to the front of the power supply electrode A 74 to drill. After drilling is completed, it is retracted.

[0049] like Figure 3 As shown, the telescopic power supply electrode 7 includes a motor assembly 71, a flange seat 72, an electric push rod 73, and a power supply electrode A 74. The motor assembly 71 is connected to the controller 6 and is mounted on the movable arch 2 via the flange seat 72. The motor assembly 71 is used to drive the electric push rod 73 to extend or retract the power supply electrode A 74. The extension length of the power supply electrode A 74 is adjustable.

[0050] When the power supply electrode A 75 is inserted into the borehole and comes into contact with the tunnel wall, it will trigger the force sensor 74. When the force sensor 74 reaches the set value, it can be considered that the power supply electrode A 75 has reached the optimal coupling state. After the detection is completed, the power supply electrode A is retracted in the same way.

[0051] In this embodiment, the image acquisition device 5 can be implemented using a high-definition camera. Its main function is to monitor and acquire images of the drilling location in real time and transmit the acquired images to the image processing unit of the controller 6. The image processing unit uses existing image stitching technology to identify whether there are foreign objects such as steel bars or gravel at the drilling location. If the image processing unit detects foreign objects at the drilling location, it will transmit the instruction to the motion control unit of the controller 6. Then, the motion control unit of the controller 6 will move the moving track 3 forward through the moving track drive assembly 31. At this time, the image acquisition device 5 will still maintain image acquisition and transmission. After the image processing unit of the controller 6 detects no foreign objects, it will transmit the instruction to the motion control unit of the controller 6 and then control the moving track drive assembly 31 to stop. At this time, the telescopic multi-degree-of-freedom drilling rig 4 can perform drilling.

[0052] In some specific embodiments, the controller 6 includes an image processing unit, a motion control unit, etc. The main function of the image processing unit is to monitor and identify the tunnel wall by stitching and processing the images captured by the high-definition camera; the motion control unit is to give commands to the various driving parts of the system and record the position and status of each driving unit.

[0053] In one or more embodiments, a detection method based on a power supply device for an excitation polarization advanced detection electrode used in TBM construction is also provided, comprising:

[0054] The excitation polarization advanced detection electrode power supply device used for TBM construction is set between the TBM shield shell 12 and the support shoe 14; wherein, the moving track 3 is laid on the second-level platform 13 of the TBM, the movable arch frame 2 is installed on the moving track 3, and the image acquisition device 5, the telescopic multi-degree-of-freedom drilling rig 4, and the telescopic power supply electrode 7 are evenly arranged at the corresponding positions of the arch frame.

[0055] During the exploration, the TBM is stopped from tunneling and several measuring electrodes M on the cutterhead are extended and coupled to the tunnel face; the movable arch frame is moved to the initial exploration position behind the TBM shield shell via a moving track;

[0056] The image acquisition device acquires the current drilling position image and transmits it to the controller. The controller determines whether there is any debris based on the drilling position image and controls the moving track drive assembly to drive the moving track to the next drilling position until there is no debris at the drilling position. The controller then controls the telescopic multi-degree-of-freedom drill to perform the drilling action, and at the same time controls the telescopic power supply electrode to extend into the drilling hole.

[0057] Specifically, when the telescopic power supply electrode extends into the borehole and comes into contact with the tunnel wall, the force sensor is triggered to work; the controller receives the pressure detected by the force sensor between the end of the telescopic power supply electrode and the tunnel wall; when the pressure between the end of the telescopic power supply electrode and the tunnel wall reaches a set value, the controller determines that the telescopic power supply electrode has reached the optimal coupling state.

[0058] After the detection is completed, the controller retracts the telescopic power supply electrode.

[0059] Specifically, during the exploration, the TBM stops tunneling, and several measuring electrodes M8 on the cutterhead 11 extend and couple with the tunnel face; the movable arch 2 moves to the initial exploration position behind the TBM shield shell 12 via the moving track 3;

[0060] At this time, if the image acquisition device 5 finds that there are steel bars, gravel and other debris on the tunnel wall corresponding to the power supply electrode A 75, it will send feedback to the controller 6. The controller 6 will control the moving track 3 to move the movable arch 2 to the rear in the excavation direction until the tunnel wall is in good condition.

[0061] Then, under the action of the main drive motor 41, the telescopic multi-degree-of-freedom drilling rig 4 extends through the telescopic rod 42. Under the action of the first drive electric cylinder 45 and the second drive electric cylinder 48, the drill bit assembly 49 can move in the front-back and up-down directions through the movement of the first slider 44 and the second slider 47. After the drill bit is adjusted to the front of the power supply electrode, under the action of the main drive motor 41 and the drill bit assembly 49, a hole is drilled in the direction perpendicular to the tunnel wall.

[0062] After drilling is completed, the drill bit assembly 49 is retracted in the same manner; then, driven by the motor assembly 71, the retractable power supply electrode 7 uses the electric push rod 72 to advance the power supply electrode A 75 into the borehole. Under the feedback adjustment of the force sensor 74 and the image acquisition device 5, the power supply electrode A 75 is fully coupled with the tunnel wall. At this time, the power supply electrode A 75 and the measuring electrode M 8 form a circuit with the reference B and reference N electrodes set on the tunnel wall at the rear end of the TBM, respectively. Through the controller and data imaging analysis, a round of detection of polarization is completed.

[0063] It should be noted that several telescopic power supply electrodes 7 can be evenly installed on the movable arch frame 2. During detection, the extension and retraction of each telescopic power supply electrode 7 can be individually controlled by the controller 6.

[0064] After completing one round of detection, the retractable power supply electrode 7 is returned to its original position, and the movable arch frame 2 is moved in the opposite direction of the excavation direction. The moving distance depends on the size of the tunnel, generally 1-2 meters. Then, the second round of detection is carried out. To ensure the accuracy of the detection results, at least 5 rounds of detection are generally carried out. After the detection is completed, the retractable power supply electrode 7, the movable arch frame 2, and the measuring electrode M8 are all returned to their original positions.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for supplying power to an induced polarization advanced detection electrode for TBM construction, characterized in that, include: Movable arch frame, moving track, telescopic multi-degree-of-freedom drilling rig, image acquisition device, controller and telescopic power supply electrode; The retractable multi-degree-of-freedom drilling rig, image acquisition device, controller, and retractable power supply electrode are all mounted on the movable arch frame. The movable arch frame matches the shape of the tunnel wall and is always in a non-contact state with the tunnel wall. The movable arch frame is mounted on the moving track, which is fixed to the second-level platform of the TBM. The moving track is connected to the moving track drive assembly, and the moving track drive assembly, the retractable multi-degree-of-freedom drilling rig, the image acquisition device, and the retractable power supply electrode are all connected to the controller. The image acquisition device is used to acquire images of the current borehole location and transmit them to the controller; The controller is used to determine whether there are foreign objects based on the drilling position image, and to control the moving track drive assembly to drive the moving track to the next drilling position until there are no foreign objects at the drilling position. It controls the telescopic multi-degree-of-freedom drilling machine to perform drilling action, and at the same time controls the telescopic power supply electrode to extend into the drilling hole. If the image processing unit detects debris at the drilling location, it transmits the command to the motion control unit of the controller. Then, the motion control unit moves the moving track forward via the moving track drive assembly. At this time, the image acquisition device continues to acquire and transmit images. After the image processing unit detects that there is no debris, it transmits the command to the motion control unit of the controller and then controls the moving track drive assembly to stop. At this time, the telescopic multi-degree-of-freedom drilling rig can start drilling. The telescopic multi-degree-of-freedom drilling rig includes a main drive motor assembly, a telescopic rod, a first drive electric cylinder, a second drive electric cylinder, and a drill bit assembly; Before the probe is launched, the telescopic rod is extended under the action of the main drive motor assembly; Under the action of the first and second drive electric cylinders, the drill bit assembly is adjusted to the front of the telescopic power supply electrode to drill, and the drill bit assembly is retracted after drilling is completed. The main drive motor assembly is mounted on a movable arch frame. The telescopic rod is fixed to the first slide rail via a telescopic rod mounting seat. A first slider is provided on the first slide rail. A second slide rail is mounted on the first slider. A second slider is provided on the second slide rail. The drill bit assembly is mounted on the second slider. The first drive electric cylinder is used to drive the movement of the first slider. The second drive electric cylinder is used to drive the movement of the second slider, so as to realize the movement of the drill bit assembly in three directions: horizontal, vertical, and vertical.

2. The induced polarization advanced detection electrode power supply device for TBM construction of claim 1, wherein, The telescopic power supply electrode is also equipped with a force sensor at its end, which is connected to the controller. When the telescopic power supply electrode is inserted into the borehole and comes into contact with the tunnel wall, the force sensor is triggered to work. The force sensor is used to detect the pressure between the end of the telescopic power supply electrode and the tunnel wall and transmit it to the controller.

3. The induced polarization advanced detection electrode power supply device for TBM construction of claim 2, wherein, The controller is used to determine that the telescopic power supply electrode has reached the optimal coupling state when the pressure between the end of the telescopic power supply electrode and the tunnel wall reaches a set value; and to control the telescopic power supply electrode to retract after the detection is completed.

4. The power supply device for the excitation polarization advanced detection electrode for TBM construction as described in claim 1, characterized in that, The moving track uses a ball screw drive.

5. The power supply device for the excitation polarization advanced detection electrode for TBM construction as described in claim 1, characterized in that, The telescopic power supply electrode includes a motor assembly, a flange seat, an electric push rod, and a power supply electrode A. The motor assembly is connected to a controller and is mounted on a movable arch frame via the flange seat. The motor assembly is used to drive the electric push rod to extend or retract the power supply electrode A, and the extension length of the power supply electrode A is adjustable.

6. A detection method based on the excitation polarization advance detection electrode power supply device for TBM construction as described in any one of claims 1-5, characterized in that, include: The power supply device for the excitation polarization advanced detection electrode used in TBM construction is set between the TBM shield shell and the support boot. During the exploration, the TBM is stopped from tunneling and several measuring electrodes M on the cutterhead are extended and coupled to the tunnel face; the movable arch frame is moved to the initial exploration position behind the TBM shield shell via a moving track; The image acquisition device acquires the current drilling position image and transmits it to the controller. The controller determines whether there is any debris based on the drilling position image and controls the moving track drive assembly to drive the moving track to the next drilling position until there is no debris at the drilling position. The controller then controls the telescopic multi-degree-of-freedom drill to perform the drilling action, and at the same time controls the telescopic power supply electrode to extend into the drilling hole.

7. The detection method as described in claim 6, characterized in that, When the telescopic power supply electrode is inserted into the borehole and comes into contact with the tunnel wall, the force sensor is triggered to work; the controller receives the pressure detected by the force sensor between the end of the telescopic power supply electrode and the tunnel wall; when the pressure between the end of the telescopic power supply electrode and the tunnel wall reaches the set value, the controller determines that the telescopic power supply electrode has reached the optimal coupling state.

8. The detection method as described in claim 6, characterized in that, After the detection is completed, the controller retracts the telescopic power supply electrode.

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