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

Abstract

The invention belongs to the field of geological advanced prediction, and provides an induced polarization advanced detection electrode power supply device and method for TBM construction. The device comprises a movable arch frame, a movable track, a telescopic multi-degree-of-freedom drilling machine, an image acquisition device, a controller and a telescopic power supply electrode, the moving track is connected with the moving track driving assembly, and the moving 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 a current drilling position image and transmitting the current drilling position image to the controller; and the controller is used for judging whether sundries exist or not according to the drilling position image so as to control the moving track driving assembly to drive the moving track to move to the next drilling position until no sundries exist in the drilling position to which the moving track moves, the telescopic multi-degree-of-freedom drilling machine is controlled to conduct drilling action, and meanwhile the telescopic power supply electrode is controlled to stretch into the drill hole. The reliability and the stability of detection can be improved.

Description

Technical Field

[0001] The invention belongs to the field of geological advance prediction, and in particular relates to an induced polarization advance detection electrode power supply device and method for TBM construction. Background Art

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

[0003] In practical applications, the common induced polarization advance detection system generally installs the measuring electrode M on the cutterhead, and the reference B and reference N electrodes are set at the tail of the TBM, about 150m away from the cutterhead. There are two main ways to set the power supply electrode A. The first is to install several power supply electrodes on the TBM shield shell. The power supply electrode A is retractable. During detection, the power supply electrode A is extended and retracted after the detection. In this method, due to the direct contact between the TBM shield shell and the tunnel wall, the retractable opening of the power supply electrode A is easily blocked by debris such as gravel, and the failure rate is high. In addition, the distance between the power supply electrode A and the TBM shield shell is small, and the TBM shield shell and the tunnel wall are squeezed together. The current is easy to form a current loop with the TBM shield shell, resulting in inaccurate detection results. The second is the artificial electrode rod. During detection, the operator holds the artificial electrode rod and inserts the artificial electrode rod into the appropriate position for detection. This method relies entirely on manual detection. The space left for manual operation in the tunnel is relatively small. The detection requires a large number of electrode rods, which is very inconvenient to carry. When detecting different positions, it is necessary to climb to the second-floor platform for operation, which is generally time-consuming and laborious. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides an induced polarization advance detection electrode power supply device and method for TBM construction, which can improve the reliability and stability of detection.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

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

[0007] An induced polarization advance detection electrode power supply device for TBM construction, comprising: a movable arch frame, a movable track, a retractable multi-degree-of-freedom drilling rig, an image acquisition device, a controller and a retractable power supply electrode;

[0008] The retractable multi-degree-of-freedom drilling rig, the image acquisition device, the controller and the retractable power supply electrode are all installed on the movable arch frame, and 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 installed on the mobile track, and the mobile track is fixed on the second-floor platform of the TBM; the mobile track is connected to the mobile track drive assembly, and the mobile 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 the image of the current drilling position and transmit it to the controller; the controller is used to determine whether there is debris based on the drilling position image, so as to control the mobile track drive assembly to drive the mobile track to move to the next drilling position until the drilling position moved to is free of debris, control the retractable multi-degree-of-freedom drilling rig to perform drilling action, and at the same time control the retractable power supply electrode to extend into the drill hole.

[0010] As an 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 extended into the borehole and contacts 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] As an embodiment, the controller is used to determine that the telescopic power supply electrode reaches an optimal coupling state when receiving a pressure between the end of the telescopic power supply electrode and the tunnel wall reaching a set value; when the detection is completed, the telescopic power supply electrode is controlled to be retracted.

[0012] As an implementation mode, the movable track adopts a ball screw transmission method.

[0013] As an 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 detection, under the action of the main drive motor assembly, the telescopic rod is controlled to extend; under the action of the first drive electric cylinder and the second drive electric cylinder, the drill bit assembly is adjusted to the front of the telescopic power supply electrode for drilling, and the drill bit assembly is retracted after the drilling is completed.

[0014] As an implementation mode, the main drive motor assembly is installed on a movable arch frame, the telescopic rod is fixed to the first slide rail through a telescopic rod mounting seat, and a first slider is provided on the first slide rail; a second slide rail is installed on the first slider, and a second slider is provided on the second slide rail, and the drill bit assembly is installed on the second slider; the first driving electric cylinder is used to drive the movement of the first slider, and the second driving 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] As an 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 the motor assembly is installed on a movable arch frame through a flange seat; the motor assembly is used to drive the electric push rod to push out 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 powering an induced polarization advance detection electrode for TBM construction.

[0017] A detection method based on an induced polarization advance detection electrode power supply device for TBM construction, comprising:

[0018] The power supply device of the induced polarization advance detection electrode used for TBM construction is arranged between the TBM shield shell and the support shoe;

[0019] During detection, the TBM is controlled to stop excavation and several measuring electrodes M on the cutterhead are extended and coupled with the tunnel face; the movable arch is controlled to move to the rear of the TBM shield shell via the moving track to detect the initial position;

[0020] The image acquisition device is used to collect the current drilling position image and transmit it to the controller. The controller determines whether there are debris based on the drilling position image, and controls the mobile track drive assembly to drive the mobile track to the next drilling position until there is no debris at the drilling position moved to. The retractable multi-degree-of-freedom drilling rig is controlled to perform the drilling action, and the retractable power supply electrode is controlled to extend into the drill hole.

[0021] As an implementation mode, when the telescopic power supply electrode is extended into the borehole and contacts the tunnel wall, the force sensor is triggered to work; the controller receives the pressure between the end of the telescopic power supply electrode and the tunnel wall detected by the force sensor; 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 reaches the optimal coupling state.

[0022] As an implementation mode, when the detection is completed, the controller controls the telescopic power supply electrode to retract.

[0023] The beneficial effects of the present invention are:

[0024] (1) The present invention uses a controller to determine whether there are debris based on the drilling position image, so as to control the mobile track drive assembly to drive the mobile track to the next drilling position until there are no debris at the drilling position moved to, control the retractable multi-degree-of-freedom drilling rig to perform drilling, and control the retractable power supply electrode to extend into the borehole, thereby realizing full automation of power supply for the induced polarization advance detection electrode without manual operation, greatly improving the detection efficiency, and at the same time ensuring personnel safety and improving the working environment of the operator.

[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 generate a loop with the TBM body to affect the detection result. The reliability and stability of the detection are greatly improved.

[0026] (3) The power supply electrode of the present invention is installed on the TBM shield shell, and its power supply position is fixed. The position of the power supply system is optimal, which can eliminate the influence of steel bars, gravel, etc. on the detection results. The detection accuracy of this system is higher.

[0027] (4) The invented induced polarization advance detection electrode power supply device for TBM construction can fully couple the power supply electrode with the tunnel wall through drilling, thereby improving the detection accuracy; the detection rounds can be set to more easily obtain more detection sample data.

[0028] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

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

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

[0032] Figure 3 Schematic diagram of the telescopic power supply electrode structure of an embodiment of the present invention.

[0033] Among them, 11. cutter head, 12. TBM shield shell, 13. TBM second-layer platform, 14. support shoe, 2. movable arch frame, 3. movable track, 31. drive assembly, 32. movable slide rail, 33. lead screw, 34. movable slider, 4. retractable 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. retractable 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 DESCRIPTION

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

[0035] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

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

[0037] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0038] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0039] Figure 1 Schematic diagram of the structure of the power supply device system for the induced polarization advance detection electrode according to an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides an induced polarization advance detection electrode power supply device for TBM construction, comprising: a movable arch frame 2, a movable track 3, a retractable multi-degree-of-freedom drilling rig 4, an image acquisition device 5, a controller 6 and a retractable power supply electrode 7;

[0040] The retractable multi-degree-of-freedom drilling rig 4, the image acquisition device 5, the controller 6 and the retractable power supply electrode 7 are all installed on the movable arch frame 2, and 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 installed on the mobile track 3, and the mobile track 3 is fixed on the second-floor platform of the TBM; the mobile track 3 is connected to the mobile track drive assembly, and the mobile 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, so as to control the movable track drive assembly to drive the movable track 3 to move to the next drilling position until there is no debris at the drilling position moved to, control the retractable multi-degree-of-freedom drill rig 4 to perform drilling action, and control the retractable power supply electrode 7 to extend into the borehole.

[0042] In this embodiment, the movable arch frame 2 is designed to be arched in 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] A force sensor 74 is also provided at the end of the telescopic power supply electrode 7 in the embodiment of the present invention, which is connected to the controller 6; when the telescopic power supply electrode 7 is extended into the borehole and contacts 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 reaches the optimal coupling state when the pressure between the end of the telescopic power supply electrode and the tunnel wall reaches a set value; when the detection is completed, the telescopic power supply electrode is controlled to be retracted.

[0045] In one or more embodiments, in order to ensure the strength and displacement accuracy of the track, the movable track 3 adopts a ball screw transmission method. The movable track 3 is composed of a driving assembly 31, a movable slide rail 32, a screw 33 and a movable slider 34. The driving assembly 31 is connected to the controller 6; the movable slider 34 is inserted on the screw 33, and the two ends of the screw 33 are fixed on the movable slide rail 32. The movable slider 34 can move along the movable screw 33 and the slide rail 32; the controller 6 is used to control the driving assembly 31 to drive the movable slider 34 to move along the screw 33 and the slide rail 32.

[0046] like Figure 2As shown, the telescopic multi-degree-of-freedom drilling rig 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 assembly 49; before detection, under the action of the main drive motor assembly 41, the telescopic rod 42 is controlled to extend; under the action of the first drive electric cylinder 45 and the second drive electric cylinder 48, the drill assembly 49 is adjusted to the front of the telescopic power supply electrode 7 for drilling, and the drill assembly 49 is retracted after the drilling is completed.

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

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

[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 the motor assembly 71 is installed on the movable arch frame 2 through the flange seat 72; the motor assembly 71 is used to drive the electric push rod 73 to move so as to push out or retract the power supply electrode A 74, and the extension length of the power supply electrode A 74 is adjustable.

[0050] When the power supply electrode A 75 is extended into the borehole and contacts the tunnel wall, the force sensor 74 is triggered. When the force sensor 74 reaches the set value, it can be considered that the power supply electrode A 75 reaches 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 by a high-definition camera, and its main function is to monitor the drilling position in real time and acquire images, and transmit the acquired images to the image processing unit of the controller 6. The image processing unit adopts the existing image stitching technology to identify whether there are debris such as steel bars and gravel at the drilling position; if the image processing unit identifies that there are debris at the drilling position, it will transmit the instruction to the motion control unit of the controller 6, and 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 still maintains the image acquisition and transmission action. After the image processing unit of the controller 6 identifies that there are no debris, it transmits the instruction to the motion control unit of the controller 6, and then controls the moving track drive assembly 31 to stop the action; at this time, the retractable multi-degree-of-freedom drilling rig 4 can drill.

[0052] In some specific embodiments, the controller 6 includes an image processing unit, a motion control unit, etc. The image processing unit mainly monitors and identifies the tunnel wall by splicing and processing the images captured by the high-definition camera; the motion control unit performs command control on the various driving parts of the system and records the position and status of each driving unit.

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

[0054] The induced polarization advance detection electrode power supply device used for TBM construction is arranged between the TBM shield shell 12 and the support shoe 14; wherein the movable track 3 is arranged on the TBM second-layer platform 13, the movable arch 2 is installed on the movable 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 position of the arch;

[0055] During detection, the TBM is controlled to stop excavation and several measuring electrodes M on the cutterhead are extended and coupled with the tunnel face; the movable arch is controlled to move to the rear of the TBM shield shell via the moving track to detect the initial position;

[0056] The image acquisition device is used to collect the current drilling position image and transmit it to the controller. The controller determines whether there are debris based on the drilling position image, and controls the mobile track drive assembly to drive the mobile track to the next drilling position until there is no debris at the drilling position moved to. The retractable multi-degree-of-freedom drilling rig is controlled to perform the drilling action, and the retractable power supply electrode is controlled to extend into the drill hole.

[0057] Among them, when the telescopic power supply electrode extends into the borehole and contacts the tunnel wall, the force sensor is triggered to work; the controller receives the force sensor to detect the pressure 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] When the detection is finished, the controller controls the telescopic power supply electrode to be retracted.

[0059] Specifically, during detection, the TBM stops excavating, and a number of measuring electrodes M8 on the cutterhead 11 extend out and couple with the tunnel face; the movable arch 2 moves to the rear of the TBM shield housing 12 through the moving track 3 to detect the initial position;

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

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

[0062] After the drilling is completed, the drill assembly 49 is retracted in the same manner; then the retractable power supply electrode 7 is driven by the motor assembly 71, and the electric push rod 72 is actuated to push the power supply electrode A 75 into the borehole, and 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 respectively form a loop with the reference B and reference N electrodes set on the tunnel wall at the rear end of the TBM, and a round of detection of induced polarization is completed through the controller and data imaging analysis.

[0063] It should be noted that a plurality of 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 retracted to its original position, and the movable arch frame 2 is moved as a whole in the opposite direction of the excavation direction. The moving distance depends on the size of the tunnel, generally 1-2 meters, and the second round of detection is carried out. In order 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 only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power supply device for induced polarization advance detection electrode used in TBM construction, characterized in that: include: Movable arch frame, mobile track, retractable multi-degree-of-freedom drilling rig, image acquisition device, controller and retractable power supply electrode; The retractable multi-degree-of-freedom drilling rig, the image acquisition device, the controller and the retractable power supply electrode are all installed on the movable arch frame, and 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 installed on the mobile track, and the mobile track is fixed on the second-floor platform of the TBM; the mobile track is connected to the mobile track drive assembly, and the mobile 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 the current drilling position image and transmit it to the controller; The controller is used to determine whether there is debris based on the drilling position image, so as to control the mobile track drive assembly to drive the mobile track to move to the next drilling position until the drilling position moved to is free of debris, control the retractable multi-degree-of-freedom drilling rig to perform drilling, and control the retractable power supply electrode to extend into the drill hole.

2. The induced polarization advance detection electrode power supply device for TBM construction according to claim 1, characterized in that: 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 extended into the borehole and contacts 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 advance detection electrode power supply device for TBM construction according to claim 2, characterized in that: The controller is used to determine that the telescopic power supply electrode reaches the optimal coupling state when receiving the pressure between the end of the telescopic power supply electrode and the tunnel wall reaches a set value; when the detection is completed, the telescopic power supply electrode is controlled to be retracted.

4. The induced polarization advance detection electrode power supply device for TBM construction according to claim 1, characterized in that: The movable track adopts a ball screw transmission mode.

5. The induced polarization advance detection electrode power supply device for TBM construction according to claim 1, characterized in that: The telescopic multi-degree-of-freedom drilling rig comprises a main drive motor assembly, a telescopic rod, a first drive electric cylinder, a second drive electric cylinder and a drill assembly; before detection, the telescopic rod is controlled to extend under the action of the main drive motor assembly; Under the action of the first driving electric cylinder and the second driving electric cylinder, the drill bit assembly is adjusted to the front of the telescopic power supply electrode for drilling, and the drill bit assembly is retracted after the drilling is completed.

6. The induced polarization advance detection electrode power supply device for TBM construction according to claim 5, characterized in that: The main driving motor assembly is installed on a movable arch frame, the telescopic rod is fixed to the first slide rail through a telescopic rod mounting seat, and a first slider is provided on the first slide rail; a second slide rail is installed on the first slider, and a second slider is provided on the second slide rail, and the drill assembly is installed on the second slider; the first driving electric cylinder is used to drive the movement of the first slider, and the second driving electric cylinder is used to drive the movement of the second slider, so as to realize the movement of the drill assembly in three directions: horizontal, vertical and vertical.

7. The induced polarization advance detection electrode power supply device for TBM construction according to 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 installed on a movable arch frame through a flange seat. The motor assembly is used to drive the electric push rod to push out or retract the power supply electrode A. The extension length of the power supply electrode A is adjustable.

8. A detection method based on the induced polarization advance detection electrode power supply device for TBM construction according to any one of claims 1 to 7, characterized in that: include: The power supply device of the induced polarization advance detection electrode used for TBM construction is arranged between the TBM shield shell and the support shoe; During detection, the TBM is controlled to stop excavation and several measuring electrodes M on the cutterhead are extended and coupled with the tunnel face; the movable arch is controlled to move to the rear of the TBM shield shell via the moving track to detect the initial position; The image acquisition device is used to collect the current drilling position image and transmit it to the controller. The controller determines whether there are debris based on the drilling position image, and controls the mobile track drive assembly to drive the mobile track to the next drilling position until there is no debris at the drilling position moved to. The retractable multi-degree-of-freedom drilling rig is controlled to perform the drilling action, and the retractable power supply electrode is controlled to extend into the drill hole.

9. The detection method according to claim 8, characterized in that: When the telescopic power supply electrode is extended into the borehole and contacts the tunnel wall, the force sensor is triggered to work; the controller receives the force sensor to detect the pressure 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.

10. The detection method according to claim 8, characterized in that: When the detection is finished, the controller controls the telescopic power supply electrode to be retracted.

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