Electrode coupling device for tunnel advanced detection

Abstract

The utility model discloses an electrode coupling device for tunnel advanced detection, which relates to the technical field of tunnel engineering and engineering geophysical prospecting, and comprises a drill rod system, a hydraulic telescopic system and a multi-electrode telescopic system, the drill rod system comprises a hollow drill rod, the hydraulic telescopic system comprises a hydraulic oil cylinder and a transmission oil cylinder, the hydraulic oil cylinder is connected with the transmission oil cylinder, and the transmission oil cylinder is connected with the multi-electrode telescopic system. A plurality of round holes are formed in the side wall of the hollow drill rod in the axial direction of the hollow drill rod, hydraulic telescopic mechanisms are arranged in the round holes and connected with a transmission oil cylinder, the multi-motor telescopic system comprises an annular electrode rail and copper electrodes, the annular electrode rail is arranged in the round holes, and the copper electrodes are evenly distributed on the inner circumference of the annular electrode rail. By introducing the design that a plurality of electrodes are coupled into rock, the electrode coupling device is well coupled with surrounding rock, the grounding resistance of the electrode coupling device is reduced, the signal-to-noise ratio of original data is increased, and the quality and precision of advanced detection are further guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel engineering, engineering geophysical prospecting technical field, concretely for a kind of electrode coupling device for tunnel advanced detection. BACKGROUND

[0002] In the real-time process of tunnel direct current method advanced detection, the current signal in the surrounding rock is mainly received by the electrode, thereby realizing the prediction of the surrounding rock groundwater in front of the working face, and the installation quality of the electrode is particularly important for collecting high-quality data. In traditional construction, the electrode installation is coupled in a combination mode of drilling + manual installation of electrode + hammering. While the on-site installation is time-consuming and labor-intensive, the coupling quality of the electrode system and the surrounding rock cannot be guaranteed. When the electrode coupling is poor, the grounding resistance will be high, thereby leading to low quality of observation data. SUMMARY

[0003] The utility model aims at overcoming the insufficient of prior art, provide a kind of electrode coupling device for tunnel advanced detection, realize electrode system automation, fast arrangement to surrounding rock.

[0004] The utility model aims at overcoming the insufficient of prior art, provide a kind of electrode coupling device for tunnel advanced detection, realize electrode system automation, fast arrangement to surrounding rock.

[0005] Further, the drill rod system further includes a drill rod plug and a threaded drill bit, and the two ends of the hollow drill rod are respectively connected with the drill rod plug and the threaded drill bit.

[0006] Further, a plurality of drill rod head coupling holes are formed in the drill rod plug.

[0007] Further, the hydraulic telescopic system further includes a hydraulic control system, which is used for hydraulic control of the hydraulic oil cylinder, and a hydraulic system control button is arranged on the hydraulic control system.

[0008] Further, the multi-electrode telescopic system further includes a transmission cable, and the transmission cable is connected with the annular electrode track.

[0009] The utility model discloses a beneficial effect is: the utility model improves the data observation quality of electric method detection, through the design of introducing multiple electrodes into rock coupling, makes electrode coupling device and surrounding rock coupling good, reduces the ground resistance of electrode coupling device, improves the signal to noise ratio of original data, indirectly further guarantees the quality and precision of advanced detection. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is structural schematic diagram for the utility model a kind of electrode coupling device for tunnel advanced detection;

[0011] Figure 2 It is use state diagram for the utility model a kind of electrode coupling device for tunnel advanced detection;

[0012] In the drawing, 1-transmission cable line, 2-drill rod plug, 3-multiple drill rod head coupling hole, 4-hydraulic control system, 5-hydraulic system control button, 6-hydraulic cylinder, 7-hollow drill rod, 8-transmission cylinder, 9-ring electrode track, 10-copper electrode, 11-hydraulic telescopic mechanism, 12-threaded drill bit. DETAILED DESCRIPTION

[0013] Example one

[0014] As Figure 1 And Figure 2As shown, an electrode coupling device for tunnel advance detection includes a drill rod system, within which a hydraulic telescopic system and a multi-electrode telescopic system are installed. The drill rod system includes a hollow drill rod 7. The hydraulic telescopic system includes a hydraulic cylinder 6, a transmission cylinder 8, and a hydraulic telescopic mechanism 11. The hydraulic cylinder 6 is connected to the transmission cylinder 8. Multiple circular holes are formed along the axial direction of the side wall of the hollow drill rod 7, and the hydraulic telescopic mechanism 11 is installed within each hole, connecting to the transmission cylinder 8. The multi-electrode telescopic system includes an annular electrode track 9 and copper electrodes 10. The annular electrode track 9 is installed within each hole, and multiple copper electrodes 10 are evenly distributed around its circumference. The two ends of each copper electrode 10 are connected to the hydraulic telescopic mechanism 11 and the annular electrode track 9, respectively. The hydraulic telescopic system also includes a hydraulic control system 4, which hydraulically controls the hydraulic cylinder 6. The hydraulic control system 4 is equipped with a hydraulic system control button 5. The multi-electrode telescopic system also includes a transmission cable 1, which connects to the annular electrode track 9. The specific working process is as follows: When the electrode coupling device needs to extend, the hydraulic system control button 5 switches to the extension position. The hydraulic control system 4 controls the hydraulic cylinder 6 to perform positive work on the transmission cylinder 8. The transmission cylinder 8 continues to perform positive work on the hydraulic telescopic mechanism 11, causing the hydraulic telescopic mechanism 11 to extend. During the extension process, multiple copper electrodes 10 are controlled to extend in and out of the annular electrode track 9 until the electrodes are pushed into the surrounding rock. This ensures good coupling between the electrode coupling device and the surrounding rock, reduces the grounding resistance of the electrode coupling device, improves the signal-to-noise ratio of the raw data, and indirectly further guarantees the quality and accuracy of the advanced detection. When the detection is completed and the system needs to retract, the hydraulic system control button 5 switches to the retraction position. The hydraulic control system 4 controls the hydraulic cylinder 6 to perform negative work on the transmission cylinder 8. The transmission cylinder 8 continues to perform negative work on the hydraulic telescopic mechanism 11, causing the hydraulic telescopic mechanism 11 to retract. The hydraulic telescopic mechanism 11 controls multiple copper electrodes 10 to retract within the annular electrode track 9, pulling the copper electrodes 10 pushed into the surrounding rock back into the annular electrode track 9, thus completing the entire detection process. It should be noted that the hydraulic telescopic mechanism 11 uses a hydraulic telescopic arm, which transmits hydraulic oil through a hydraulic cylinder and a transmission cylinder 8 to perform telescopic operations. This is existing technology and will not be described in detail here.

[0015] Example 2

[0016] Based on Example 1, such as Figure 1 As shown, the drill pipe system also includes a drill pipe plug 2 and a threaded drill bit 12. The two ends of the hollow drill pipe 7 are connected to the drill pipe plug 2 and the threaded drill bit 12 respectively. The drill pipe plug 2 has a multi-drill pipe head coupling hole 3. The drill pipe plug 2, the hollow drill pipe 7 and the threaded drill bit 12 are rigidly connected. The entire drill pipe system is driven by an external drilling machine. The drill pipe system and the external drilling machine are coupled by the multi-drill pipe head coupling hole 3, which improves the coupling effect between the drilling machine and the drill bit while ensuring the rigidity of the drill pipe system.

[0017] In summary, the specific implementation steps of the electrode coupling device are:

[0018] (1) Use a dedicated external drilling machine to connect the drill rod system and perform drilling operations on the surrounding rock of the tunnel hole arm until the specified depth is reached;

[0019] (2) Adjust the hydraulic system control button 5 to the extended gear, and the hydraulic control system 4 controls the hydraulic oil cylinder 6 to do positive work, so that the hydraulic telescopic mechanism 11 controls the copper electrode 10 on the annular electrode track 9 to extend into the surrounding rock of the drill hole wall;

[0020] (3) The instrument main machine system starts data acquisition work;

[0021] (4) After the data acquisition is completed, adjust the hydraulic system control button 5 to the inner shrink gear, and the hydraulic control system 4 controls the hydraulic oil cylinder 6 to do negative work, so that the hydraulic telescopic mechanism 11 controls the copper electrode 10 extended into the drill hole wall surrounding rock to shrink back into the annular electrode track 9;

[0022] (5) Remove the entire electrode coupling device system, and the test work is completed.

Claims

1. An electrode coupling device for tunnel advance detection, characterized by, The application relates to a drill rod system, which is provided with a hydraulic telescopic system and a multi-electrode telescopic system, and comprises a hollow drill rod (7), the hydraulic telescopic system comprises a hydraulic cylinder (6), a transmission cylinder (8) and a hydraulic telescopic mechanism (11), the hydraulic cylinder (6) is connected with the transmission cylinder (8), a plurality of round holes are formed in the side wall of the hollow drill rod (7) along the axial direction of the hollow drill rod (7), the hydraulic telescopic mechanism (11) is arranged in the round holes, the hydraulic telescopic mechanism (11) is connected with the transmission cylinder (8), the multi-electrode telescopic system comprises a ring-shaped electrode track (9) and a copper electrode (10), the ring-shaped electrode track (9) is arranged in the round holes, a plurality of copper electrodes (10) are arranged on the inner circumference of the ring-shaped electrode track (9), and the two ends of the copper electrode (10) are respectively connected with the hydraulic telescopic mechanism (11) and the ring-shaped electrode track (9).

2. The electrode coupling device for tunnel advance detection according to claim 1, wherein, The drill rod system further comprises a drill rod plug (2) and a threaded drill bit (12), and the two ends of the hollow drill rod (7) are respectively connected with the drill rod plug (2) and the threaded drill bit (12).

3. The electrode coupling device for tunnel advance detection of claim 2, wherein, A plurality of drill rod head coupling holes (3) are formed in the drill rod plug (2).

4. The electrode coupling device for tunnel advance detection of claim 1, wherein, The hydraulic telescopic system further comprises a hydraulic control system (4), the hydraulic control system (4) is used for controlling the hydraulic cylinder (6) in a hydraulic mode, and the hydraulic control system (4) is provided with a hydraulic system control button (5).

5. The electrode coupling device for tunnel advance detection of claim 1, wherein, The multi-electrode telescopic system further comprises a transmission cable (1), and the transmission cable (1) is connected with the ring-shaped electrode track (9).

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